At a glance
- Output Voltage
- 5 V
- Rated Output Current
- 4 A
- Rated Output Power
- 20 W
- Input Voltage Range
- 80 to 264 V AC, 113 to 370 V DC
- Efficiency (typ.)
- 80%
- Operating Temperature
- -25 to +60 °C
MEAN WELL GSM25B05-P1J AC/DC Power Adapter, 5 V, 4 A, 20 W
Price on request
At a glance
- Output Voltage
- 5 V
- Rated Output Current
- 4 A
- Rated Output Power
- 20 W
- Input Voltage Range
- 80 to 264 V AC, 113 to 370 V DC
- Efficiency (typ.)
- 80%
- Operating Temperature
- -25 to +60 °C
Medical type external adapter that powers equipment from a mains socket, for devices that need low leakage and strong isolation from the mains. 20 W AC/DC power adapter with a 5 V DC output rated at 4 A, for 80 to 264 V AC, 113 to 370 V DC input.
Include the required quantity and configuration in your quote request. Price and availability will be confirmed in the quotation.
- WarrantyManufacturer warranty under MEAN WELL's terms: 3 years. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
What it is
The MEAN WELL GSM25B05-P1J is a 20 W AC/DC power adapter from the GSM25B series (25 W AC-DC Reliable Green Medical Adaptor). It provides a 5 V DC output with up to 4 A of rated current.
What it is used for
External adapters power equipment from a wall socket without opening the device, for example network gear, small controllers and cameras that accept the matching DC plug. MEAN WELL describes this series as a medical type; confirm the medical safety approvals for your equipment in the datasheet.
Key Specifications
- Input range: 80 to 264 V AC, 113 to 370 V DC.
- Output: 5 V, 4 A rated current, 20 W rated power.
- Typical efficiency: 80%.
- Operating temperature: -25 to +60 °C (see derating curve in datasheet).
- Dimensions: 79 x 54 x 33 mm (L x W x H).
Buying considerations
Choose a rated current with headroom above the total load of the connected devices, and check the derating curve in the datasheet if the supply will run hot or at low input voltage. Other output voltages and power ratings in the same series are listed on this page.
Installation considerations
MEAN WELL treats this unit as a component to be installed inside final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring, safety and EMC details are in the official datasheet linked below.
Features

Size and fit
- Dimensions
- 79 x 54 x 33 mm (L x W x H)
- Weight
- 235g
- Mounting
- Adapter
Technical specifications
Key facts
- What is it?
- Chargers & Power AdaptersBrand MEAN WELL, model GSM25B05-P1J
- What does it output?
- 5 V, 4 A, 20 W
- What input does it accept?
- 80 to 264 V AC, 113 to 370 V DC
- Which documents are available?
- Datasheet, certificate Open documents
Output
- Output Voltage
- 5 V
- Rated Output Current
- 4 A
- Output Current Range
- 0 to 4 A
- Rated Output Power
- 20 W
- Output Voltage Tolerance
- ±6.0%
- Ripple and Noise (max.)
- 60 mVp-p
- Line Regulation
- ±1.0%
- Load Regulation
- ±6.0%
- Efficiency (typ.)
- 80%
- Hold Up Time (typ.)
- 16 ms / 230 V AC, 16 ms / 115 V AC at full load
Input
- Input Voltage Range
- 80 to 264 V AC, 113 to 370 V DC
- Input Frequency Range
- 47 to 63 Hz
Protection
- Withstand Voltage
- I/P-O/P: 4 kV AC
Environment
- Operating Temperature
- -25 to +60 °C (see derating curve in datasheet)
- Operating Humidity
- 20% to 90% RH non-condensing
Physical
- Dimensions
- 79 x 54 x 33 mm (L x W x H)
- Weight
- 235g
- Mounting
- Adapter
Approvals
- MTBF
- 3887.1K hrs min. Telcordia SR-332 (Bellcore)
Other
- Series
- GSM25B
- Warranty
- Manufacturer warranty under MEAN WELL's terms: 3 years. How claims work
Product attributes and shipping details
| Brand | MEAN WELL |
|---|---|
| Power Output | 20 W |
Downloads
Documentation
- GSM25B series datasheetDatasheet · Family · meanwell.comDownload
Certificate and compliance document (1)
- GSM25B CE declaration of conformityCertificate · Family · meanwell.comDownload
Series documents can differ from your exact model. Report a wrong or missing file
Questions about this product
What input voltage does the GSM25B05-P1J accept?
MEAN WELL lists an input range of 80 to 264 V AC, 113 to 370 V DC for the GSM25B series.
Ask about this modelSetup, compatibility, what is in the box
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