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Hezhongsheng STW350-ABDD-ATX 350W Industrial ATX Power Supply with Integrated Fan Cooling for SMT Machines

Name: Hezhongsheng STW350-ABDD-ATX 350W Industrial ATX Power Supply with Integrated Fan Cooling for SMT Machines
Brand: SMT PARTS SUPPLY LTD
SKU: STW350-ABDD-ATX
Price: 55.00 USD
Availability: InStock

Brand Name:	Hezhongsheng
Model Number:	STW350-ABDD-ATX

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA&JAPEN

Product Name:

SMT Mounter Host Computer Power Supply

Brand:

Hezhongsheng

Manufacturer:

Shenzhen Hezhongsheng Electronics

Model:

STW350-ABDD-ATX

Part Number:

EP06-000384

Rated Power:

350W

Power Supply Standard:

Industrial ATX

Power Conversion Type:

AC To DC

Product Category:

SMT Machine Electrical Spare Part

Main Application:

SMT Placement Machine Host Computer

Applicable Machine Series:

Compatible SM-Series SMT Mounters

Installation Position:

Industrial PC / Host Computer Cabinet

Cooling Type:

Integrated Fan Cooling

Enclosure:

Metal Housing

Input Voltage:

Confirm According To Product Nameplate

Output Voltage:

Multiple ATX DC Outputs

Highlight:

350W Power Supply

Industrial ATX Power Supply

Integrated Fan Cooling Power Supply

Product Description

Hezhongsheng STW350-ABDD-ATX 350W ATX SM-Series Power Supply EP06-000384

The Hezhongsheng STW350-ABDD-ATX is a 350W industrial ATX power supply identified by SMT spare-part number EP06-000384. It is installed in the host computer section of compatible SM-series SMT placement equipment, where it converts incoming AC electricity into regulated DC power required by the industrial computer, motherboard, storage devices, cooling fan, interface boards, and related control electronics.

A stable host-computer power supply is essential for machine startup, software operation, production-program loading, communication, data processing, and operator-interface performance. When the existing power supply becomes unstable, the placement machine may experience intermittent booting, unexpected shutdowns, control-computer alarms, display loss, repeated restarting, or communication interruptions.

For reliable selection, buyers should compare the complete model number, spare-part number, input label, output label, connector arrangement, mounting dimensions, cable length, machine model, and hardware revision before placing an order. Public listings identify this model as a 350W ATX host-PC power supply for SMT mounter applications.

Why a Stable SMT Host Power Supply Matters

An SMT placement machine depends on several interconnected control systems. Even when motors, feeders, cameras, sensors, and motion-control boards remain in good condition, an unstable host-computer power supply can prevent the machine from operating normally.

The STW350-ABDD-ATX supplies electrical power to the industrial computer responsible for running the machine operating system and placement software. Voltage instability may affect startup reliability, communication with controller boards, program execution, production-data storage, and graphical user-interface performance.

A correctly matched power supply helps maintenance teams restore the machine without unnecessary modification to the host-computer cabinet. Matching by the full model and part number also reduces the risk of ordering a general desktop ATX power supply that has different dimensions, connectors, cable routing, control signals, or electrical characteristics.

Cause — Common Reasons for Power Supply Failure

Industrial power supplies operate for long periods inside production equipment. Heat, dust, voltage fluctuation, fan deterioration, and component aging can gradually reduce performance.

Common Cause	Typical Condition	Possible Machine Result
Capacitor aging	Long operating hours and repeated thermal cycles	Difficult startup, unstable voltage, or random restart
Cooling fan deterioration	Fan noise, low airflow, dust blockage, or stopped fan	Internal overheating and protective shutdown
Dust accumulation	Conductive or insulating dust inside the power supply	Reduced cooling, short circuit risk, or unstable operation
Input voltage fluctuation	Unstable factory power or repeated surge conditions	Protection activation or damaged internal components
Loose power connector	Vibration, repeated maintenance, or poor connector seating	Intermittent computer shutdown or boot failure
Overloaded output	Additional hardware or abnormal load on a DC rail	Voltage drop, restart, overheating, or no output
Cable damage	Crushed, aged, burned, or poorly repaired wiring	Intermittent supply or excessive connector resistance
Internal component fatigue	Continuous high-temperature production environment	Reduced output stability and shortened service life
Incorrect replacement unit	Wrong connector, rating, or ATX configuration	Failure to start or risk of equipment damage
Poor cabinet ventilation	Blocked filters or failed cabinet cooling system	Increased internal temperature and recurring faults

Typical Symptoms of a Faulty Host Computer Power Supply

Symptom	Possible Power-Related Explanation	Recommended Check
Host computer does not start	No AC input, no standby output, or internal power failure	Check input, fuse, switch, connectors, and PSU output
Machine starts after several attempts	Aging capacitors or unstable startup circuit	Test during cold startup and compare DC output
Computer restarts during production	Output voltage drop, heat buildup, or loose connection	Inspect load, fan, connectors, and temperature
Display suddenly turns off	Host computer power interruption	Check PSU, display power, and motherboard connection
Operating system freezes	Unstable DC output or storage-device power interruption	Check voltage stability and storage connectors
Communication alarm appears	Host computer restarts or interface board loses power	Check PC power stability before replacing control boards
Burning smell or abnormal noise	Internal component damage or fan failure	Stop the machine and isolate power immediately
Fan does not rotate	Fan failure, control issue, or no power output	Inspect after disconnecting the equipment safely
Machine works when cold but fails when warm	Thermal degradation or insufficient ventilation	Perform temperature-related testing
Connector becomes hot	Loose terminal, oxidation, or excessive contact resistance	Replace damaged connector and inspect cable condition

These symptoms may also be caused by motherboards, storage devices, memory modules, cables, or control boards. The power supply should therefore be tested as part of a complete troubleshooting process rather than replaced without inspection.

Solution — Maintenance-Focused Power Supply Selection

The STW350-ABDD-ATX provides a practical service option when the installed EP06-000384 power supply has been confirmed defective or unstable. Correct matching allows the maintenance team to replace the faulty unit while retaining the existing industrial computer configuration.

Maintenance Requirement	Recommended Solution	Operational Benefit
Restore a non-starting host PC	Match STW350-ABDD-ATX and EP06-000384 exactly	Reduces compatibility uncertainty
Minimize production interruption	Prepare the verified power supply before shutdown	Shortens maintenance waiting time
Avoid wiring modification	Compare every connector and cable position	Helps maintain the existing installation layout
Prevent repeated faults	Inspect cabinet cooling and input power quality	Protects the replacement power supply
Reduce wrong-part orders	Submit label and connector photographs	Improves quotation and selection accuracy
Support preventive maintenance	Keep one verified unit as a critical spare	Improves response to unexpected downtime
Confirm electrical suitability	Check input and output label information	Prevents voltage or configuration mismatch
Maintain safe installation	Use qualified electrical maintenance personnel	Reduces installation and equipment risk

Specifications

Specification Item	Product Information
Manufacturer / Label Brand	Shenzhen Hezhongsheng Electronics
Product Model	STW350-ABDD-ATX
SMT Spare-Part Number	EP06-000384
Product Name	SMT Mounter Host Computer Power Supply
Power Rating	350W
Power Supply Type	Industrial ATX AC-DC switching power supply
Main Function	Provides regulated DC power for the SMT machine host computer
Installation Area	Industrial PC or host-computer section of compatible SMT equipment
Application Category	SMT machine electrical spare part
Applicable Equipment	Compatible SM-series SMT placement machines using the same model and part number
Electrical Conversion	Alternating-current input to multiple direct-current outputs
Input Voltage	Confirm according to the original power supply nameplate
Input Frequency	Confirm according to the nameplate
Output Voltages	Multiple ATX DC outputs; confirm label and connector configuration
Output Current	Confirm each output rail according to the original nameplate
Main Connector Type	Machine-specific ATX configuration; photograph verification required
Additional Connectors	Depend on machine and power supply revision
Cooling Method	Integrated forced-air cooling fan
Mounting Style	Internal host-computer cabinet installation
Housing Material	Metal enclosure
Color	Metal finish or production-batch standard
Dimensions	Confirm against the removed unit before ordering
Cable Length	Confirm by actual unit or photograph
Connector Pinout	Must match the installed power supply exactly
Condition Options	Subject to quotation and current stock
Quantity	Available from one unit, subject to confirmation
Testing	Functional inspection can be confirmed before shipment
Packaging	Anti-static, cushioning, moisture-resistant export packaging
Compatibility Rule	Match model, part number, label, connectors, dimensions, and machine revision
Installation Requirement	Installation by qualified maintenance personnel
Warranty	Confirm according to product condition and quotation

Key Product Features

Feature	Description
350W Rated Power	Designed to support the electrical requirements of a compatible industrial host-computer system
Industrial ATX Configuration	Intended for equipment control computers rather than ordinary consumer desktop selection
Model-Based Compatibility	Clearly identified by STW350-ABDD-ATX for easier maintenance matching
SMT Part-Number Identification	EP06-000384 helps buyers compare maintenance records and installed components
Stable Power Conversion	Converts AC input into regulated DC outputs required by host-computer electronics
Integrated Cooling	Internal fan assists heat removal during continuous machine operation
Metal Protective Housing	Supports internal protection and mechanical installation within the computer cabinet
Maintenance-Friendly Design	Allows replacement of a defective host power supply after proper verification
Reduced Selection Risk	Label, connector, dimension, and machine-revision checks improve ordering accuracy
Export Packaging Support	Protective packing helps reduce transportation damage during international shipment

Application

The STW350-ABDD-ATX is primarily used in the industrial host-computer section of compatible SMT placement machines. Its purpose is different from a servo driver, feeder power supply, motion controller, or machine-level 24V switching power supply.

Application Area	Function of the Power Supply
SMT placement machine host PC	Supplies regulated DC power to the industrial computer
Machine operating system	Supports computer startup and continuous software operation
Placement-program management	Powers the hardware used to load, edit, and store production programs
Operator interface	Supports display, keyboard, storage, and communication functions
Industrial motherboard	Provides ATX power rails and startup-control functions
Storage device	Supplies power to the system disk or other compatible storage hardware
Interface and communication cards	Supports communication between the host PC and machine controllers
Maintenance spare inventory	Provides a verified spare for critical machine downtime situations
SMT machine refurbishment	Used during restoration of compatible host-computer systems
Production-line repair	Helps recover equipment affected by host power instability

Suitable Purchasing Scenarios

Purchasing Scenario	Why This Model May Be Required
Existing unit is marked STW350-ABDD-ATX	Direct model comparison is possible
Maintenance record shows EP06-000384	Spare-part identification supports selection
Host computer cannot start	The installed PSU may require testing or replacement
Computer restarts during operation	DC output may be unstable under load
Cooling fan has stopped	Continued use may cause overheating
Power supply shows heat damage	Replacement and cabinet inspection are recommended
Customer maintains several compatible machines	A verified spare can reduce emergency downtime
Machine is being refurbished	The host power system may need inspection or renewal
Local repair is not economical	A complete tested unit may simplify maintenance
Buyer needs international delivery	Protective individual packaging can be arranged

How It Works

The STW350-ABDD-ATX functions as the electrical conversion and distribution unit for the industrial host computer.

Working Stage	Operating Principle
1. AC Power Input	The power supply receives AC electricity from the machine’s approved electrical circuit
2. Input Protection	Internal protective components help manage abnormal current and basic electrical disturbances
3. Rectification and Switching	Incoming AC is converted and processed through a high-frequency switching circuit
4. Voltage Transformation	Internal transformer and control circuits produce the required low-voltage DC outputs
5. Output Regulation	Feedback circuitry stabilizes output voltage as the computer load changes
6. ATX Control	Standby power and startup signals support controlled motherboard startup and shutdown
7. Power Distribution	Connectors deliver DC power to the motherboard, storage device, fan, and related hardware
8. Thermal Management	The integrated fan removes heat from internal switching components
9. Protection Response	The supply may shut down when abnormal load, temperature, or electrical conditions are detected
10. Continuous Operation	Stable DC power supports the machine host computer during production

Because ATX power supplies can use similar external connectors while having different pin arrangements or cable configurations, visual similarity alone is not sufficient for selection.

Operational Benefits

Benefit	Value for SMT Production
Reliable host startup	Helps the machine control computer start consistently
Stable computer operation	Reduces power-related restart and shutdown risk
Improved maintenance efficiency	Model and part-number matching simplifies identification
Lower downtime exposure	A verified spare can shorten emergency repair time
Existing-system retention	Allows continued use of the current industrial computer configuration
Easier inventory control	Clear model identification supports spare-parts management
Reduced diagnostic confusion	Power instability can be isolated before expensive boards are replaced
Safer purchasing process	Connector and label verification reduces wrong-unit orders
International supply support	Suitable for individual or batch spare-parts procurement
Preventive maintenance value	Can be stocked for machines with long operating histories

How to Choose the Correct STW350-ABDD-ATX

A model name alone should not be the only purchasing reference. SMT equipment may have different production years, computer revisions, connector arrangements, or internal modifications.

Compatibility Checklist

Verification Item	What the Buyer Should Provide	Why It Is Important
Complete model number	Clear photograph showing STW350-ABDD-ATX	Prevents confusion with similar power supplies
Spare-part number	Photograph or record showing EP06-000384	Confirms the SMT maintenance reference
Manufacturer label	Full front and side label photographs	Shows rating and production information
Input specification	Voltage and frequency printed on the label	Ensures electrical compatibility
Output specification	Complete output-voltage and current table	Confirms load capability
Main connector	Front and rear photographs	Verifies connector style and position
Connector pin count	Clear close-up images	Reduces wiring mismatch risk
Additional cables	Photographs of every plug	Confirms storage and auxiliary connections
Housing dimensions	Length, width, and height	Ensures correct cabinet installation
Mounting holes	Hole positions and installation direction	Prevents mechanical mismatch
Cable length	Approximate length of each cable group	Ensures connectors reach installed hardware
Fan orientation	Photograph of fan and air outlet	Maintains correct cabinet airflow
Machine model	Full SMT machine model	Supports application checking
Machine serial number	Equipment identification plate	Helps distinguish hardware revisions
Existing fault	Startup, restart, fan, voltage, or alarm details	Helps confirm whether the PSU is the likely cause
Required condition	New, tested used, or refurbished	Allows an accurate quotation
Required quantity	Number of units needed	Supports stock and delivery planning

Important Model-Matching Rules

Rule	Recommendation
Do not order by wattage only	Two 350W power supplies may have different connectors or pinouts
Do not order by appearance only	Similar housings can contain different electrical configurations
Check both identifiers	Match STW350-ABDD-ATX and EP06-000384 whenever possible
Compare the complete label	Input and output information should agree with the removed unit
Confirm the machine revision	Different production years may use different host computers
Inspect all connectors	Quantity, shape, pin count, and cable position must match
Measure the enclosure	The unit must fit the existing cabinet and mounting points
Check the fan direction	Incorrect airflow can increase cabinet temperature
Report previous modifications	Repaired or modified wiring may no longer follow the standard layout
Ask before energizing	Uncertain wiring should be checked by a qualified technician

Installation Guidance

The following procedure is intended as a general maintenance reference. Actual installation should follow the machine service documentation and local electrical-safety requirements.

Installation Step	Recommended Action
1. Stop production	Complete the current machine cycle and save required production data
2. Shut down software	Use the normal operating-system shutdown procedure
3. Isolate electricity	Turn off and lock out the machine power source
4. Confirm zero-energy state	Wait for internal capacitors to discharge before handling
5. Record connections	Photograph every cable and connector before removal
6. Label cables	Mark each cable to prevent incorrect reconnection
7. Remove the defective unit	Support the power supply while removing mounting screws
8. Compare both units	Check label, dimensions, connectors, cables, and fan direction
9. Install securely	Tighten mounting screws without damaging the housing
10. Reconnect carefully	Confirm connector orientation and complete insertion
11. Inspect the cabinet	Remove dust and verify ventilation before startup
12. Perform initial test	Start the host computer without beginning production immediately
13. Check system stability	Observe fan operation, startup, display, and software loading
14. Run a controlled trial	Test machine communication and basic operation
15. Resume production	Monitor the machine during the first production period

Never open the power supply enclosure while it is connected to electricity. Internal capacitors may retain hazardous energy even after the external power has been disconnected.

Pre-Shipment Inspection

A professional inspection process can reduce installation problems and international return costs.

Inspection Item	Inspection Content
Model verification	Confirm STW350-ABDD-ATX marking
Part-number verification	Confirm EP06-000384 identification when available
Exterior condition	Check housing, screws, fan guard, and visible damage
Connector condition	Inspect plugs, terminals, locking clips, and cable insulation
Fan condition	Check smooth rotation and abnormal mechanical noise
Cable condition	Inspect for cuts, crushing, overheating, or previous repair
Electrical test	Confirm startup and basic output according to available test conditions
Load test	Can be discussed according to order requirements
Photograph record	Product photographs can be prepared before shipment
Packaging inspection	Confirm anti-static and cushioning protection
Label protection	Prevent label abrasion during transportation
Final quantity check	Confirm ordered quantity and packing list

Testing methods and available reports should be confirmed before ordering, especially for used or refurbished units.

Packaging and International Delivery

Packaging Layer	Purpose
Anti-static protection	Helps protect electronic components from electrostatic discharge
Moisture-resistant wrapping	Reduces exposure to humidity during transportation
Connector protection	Prevents plugs and pins from impact or deformation
Cushioning material	Absorbs vibration and external shock
Individual inner carton	Separates the unit from other spare parts
Reinforced outer carton	Provides additional protection for export shipment
Clear product label	Supports warehouse identification and receiving inspection
Packing-list verification	Confirms model, quantity, and order reference

For urgent maintenance orders, buyers should provide the destination country, postal code, required quantity, and preferred delivery date when requesting a quotation.

Recommended Spare-Parts Strategy

SMT factories often focus their spare inventory on feeders, nozzles, motors, and sensors, while the host-computer power supply is overlooked. However, a failed computer power supply can stop the complete machine.

Inventory Situation	Recommended Action
One machine using this model	Record the complete label and supplier reference
Multiple machines using this model	Maintain at least one verified common spare
Machine operates continuously	Include the power supply in preventive inspection
Equipment is more than several years old	Inspect fan noise, dust, and startup stability
Replacement lead time is long	Order a verified spare before an emergency occurs
Factory power is unstable	Check surge protection and electrical grounding
Cabinet temperature is high	Improve filters, fans, and ventilation
Previous PSU failure occurred	Investigate the root cause before installing another unit

FAQ

1. Is STW350-ABDD-ATX the same as EP06-000384?

STW350-ABDD-ATX is the power supply model, while EP06-000384 is the SMT spare-part reference commonly associated with the unit. Buyers should still compare the complete label, connectors, dimensions, output ratings, and machine revision before confirming compatibility.

2. Can I select this product only because my old power supply is rated 350W?

No. Wattage alone is not sufficient. Different 350W ATX power supplies may use different cable lengths, connector quantities, pin arrangements, mounting dimensions, fan positions, or startup-control configurations. Always match the complete model and actual photographs.

3. Which SMT machines can use this power supply?

It is intended for compatible SM-series SMT placement-machine host computers using STW350-ABDD-ATX and EP06-000384. Compatibility should be verified by the installed unit rather than by machine family alone because hardware revisions may differ.

4. What information is required for a quotation?

Please provide the machine model, machine serial number, required quantity, delivery country, complete old-unit label photograph, front and rear photographs, all connector images, housing dimensions, and preferred product condition. This information helps prevent an incorrect order.

5. What should be checked after installation?

Check the cooling fan, host-computer startup, display, operating-system loading, machine-software operation, communication with machine controllers, abnormal noise, connector temperature, and restart stability. Run a controlled machine test before returning to full production.

Contact Us

Contact our SMT spare-parts team for model confirmation, stock status, condition options, testing requirements, packaging details, delivery time, and quotation support.

To receive an accurate offer, please send:

Required Information	Details
Product model	STW350-ABDD-ATX
Spare-part number	EP06-000384
Machine information	Complete model and serial number
Label photographs	Clear images of all rating labels
Connector photographs	Main connector and every auxiliary plug
Product dimensions	Length, width, and height
Required quantity	Trial order or batch requirement
Product condition	Confirm preferred condition
Delivery destination	Country, city, and postal code
Required delivery date	Standard or urgent maintenance order
Fault description	No startup, restart, fan failure, or other symptom

Send your complete requirement for fast compatibility checking and a detailed quotation. Correct identification before shipment helps reduce maintenance delays, return costs, and production downtime.

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