MEAN WELL GST40A12-P1J Power Supply

The MEAN WELL GST40A12-P1J is an AC-DC industrial desktop adapter that delivers 12 V DC at up to 3.34 A (40 W). It accepts a universal input voltage of 90–264 V AC, meets RoHS requirements and comes in a compact enclosure (50 mm wide, 125 mm deep) weighing 287 g. The adapter uses a 3-pole IEC320-C14 AC inlet and is intended for reliable low-voltage power supply in a variety of electronic devices.

Advantages

This 40 W power adapter provides a stable 12 V output with a wide input range, enabling use in different mains environments. Its compact size and moderate weight make it suitable for desktop installations where space is limited. The unit is RoHS compliant and uses a standard IEC320-C14 inlet for easy connectivity with common AC cords.

Suitable for

• Powering routers, switches and small network equipment
• Supplying LED drivers and signage controllers
• Desktop electronics, small industrial control modules
• Replacement or spare adapter for compatible 12 V devices

Key specifications

• Brand: MEAN WELL
• Model: GST40A12-P1J
• Output: 12 V DC, 3.34 A (40 W)
• Input voltage: 90–264 V AC
• AC inlet: 3-pole IEC320-C14
• Compliance: RoHS
• Dimensions: 50 mm (W) × 125 mm (D)
• Weight: 287 g
• MPN: GST40A12-P1J
• EAN: 4021087028547

How to use

Connect a compatible IEC320-C13 mains cord to the adapter's IEC320-C14 inlet and plug the cord into a suitable AC outlet within the 90–264 V range. Connect the adapter's DC output lead to the 12 V input of the target device, ensuring correct polarity. Verify the device's required current does not exceed 3.34 A. Place the adapter on a stable, ventilated surface and avoid covering ventilation areas during operation.

Recommendations

Use the adapter only with devices specified for 12 V DC input and within the 3.34 A current limit. Do not expose the unit to moisture or extreme temperatures. If used as a replacement, confirm connector compatibility and polarity before powering the device.