Power adapter MEAN WELL GSM40B12-P1J 40W 12V 80-264V

The MEAN WELL GSM40B12-P1J is an AC-DC medical desktop adapter delivering 12V DC at 3.34A (40W) from an 80–264V AC input. It uses a 2-pin IEC320-C8 input socket and supplies output through a P1J tuning fork plug with outer diameter 5.5 mm, inner diameter 2.1 mm and length 11 mm. The adapter meets EN 60601 medical safety requirements with 2xMOPP isolation, is Class II and RoHS compliant. Its compact dimensions (50 mm × 125 mm) and weight of 281.8 g make it suitable for medical and professional devices requiring a reliable low-voltage supply.

Advantages

The GSM40B12-P1J provides a stable 12V/3.34A output with built-in medical-grade isolation (EN 60601, 2xMOPP) and Class II double insulation, reducing risk in clinical environments. Its wide input range (80–264V AC) allows global use without an external converter, while the standardized P1J tuning fork plug (5.5 × 2.1 × 11 mm) and IEC320-C8 inlet simplify installation and replacement. Compact size and RoHS compliance add to its suitability for regulated equipment.

Suitable for

• Medical desktop equipment requiring 12V, 3.34A power
• Professional devices with P1J (5.5×2.1×11 mm) DC input
• Applications needing EN 60601-compliant power supplies

Key specifications

• Manufacturer: MEAN WELL (brand: mean well)
• Model / MPN: GSM40B12-P1J
• EAN: 4021087036863
• Input: 80–264V AC via 2-pin IEC320-C8
• Output: 12V DC, 3.34A (40W)
• Output connector: P1J tuning fork plug, OD 5.5 mm, ID 2.1 mm, length 11 mm
• Medical safety: EN 60601 with 2xMOPP isolation
• Class: Class II
• Compliance: RoHS
• Dimensions (W × D): 50 mm × 125 mm
• Weight: 281.8 g

How to use

Connect the adapter to mains power using the IEC320-C8 inlet, then insert the P1J tuning fork plug into the target device’s DC input socket ensuring correct polarity. Verify that the device requires 12V DC and does not draw more than 3.34A. Place the adapter on a stable, ventilated surface and do not cover the unit during operation. Disconnect from mains before performing any maintenance on the connected device.

Recommendations

Use the GSM40B12-P1J only with equipment designed for a 12V DC supply and compatible P1J connector dimensions; avoid exposure to liquids, extreme temperatures, or mechanical stress. For medical environments follow facility electrical safety procedures and schedule regular inspections of the adapter and cable.