Mean Well GSM25U09-P1J Power Supply 25W 9V 2.77A

Name: Mean Well GSM25U09-P1J Power Supply 25W 9V 2.77A
Brand: Mean Well
SKU: GSM25U09-P1J
Price: 16.69 USD
Availability: InStock

Overview

GSM25U09-P1J is the 9V output model of this series: rated current 2.77A, typical efficiency 84%.

GSM25U is a highly reliable, 25W wall-mounted style single-output green medical adaptor series. This product is equipped with a 2-pin (no FG) standard USA AC power plug, adopting the input range from 80VAC to 264VAC. The entire series supplies different output voltages between 5VDC and 48VDC that can satisfy the demands for various kinds of miniaturize medical devices. The circuitry design meets the international medical standards (2×MOPP), having an ultra low leakage current (<50 μA), fitting the medical devices in direct electrical contact with the patients. With the efficiency up to 88% and the extreme low no-load power consumption below 0.1W, GSM25U is compliant with USA EISA 2007/DoE and Canada NRCan; the superme feature allows the adaptor to save the energy when it is either under the operating mode or the standby mode. The entire series utilizes the 94V-0 flame retardant plastic case, providing the double insulation that effectively prevents electrical shock. GSM25U is approved with the international medical safety certificates.

Features

2 pole USA plug, Class Ⅱ power unit
Medical safety approved (2×MOPP) according to ANSI/AAMI ES60601-1/-1-11
Extremely low leakage current
No load power consumption<0.1W
Energy efficiency Level Ⅵ ( except 5~9V for Level Ⅴ)
-25~+60℃ wide range working temperature
Protections: Short circuit / Overload / Over voltage
LED indicator for power on
Various DC plug quick adapter accessory available (Plug kit sold sperately, please refer to : https://www.meanwell.com/upload/pdf/DC_plug.pdf)
3 years warranty

Specifications

GSM25U09-P1JSpecifications from the official datasheet (2026-04-03 edition)

OUTPUT

SAFETY MODEL NO.: GSM25U09
DC VOLTAGE^Note.2: 9V
RATED CURRENT: 2.77A
CURRENT RANGE: 0 ~ 2.77A
RATED POWER (max.): 25W
RIPPLE & NOISE (max.)^Note.3: 80mVp-p
VOLTAGE TOLERANCE^Note.4: ±5.0%
LINE REGULATION^Note.5: ±1.0%
LOAD REGULATION: ±5.0%
SETUP, RISE TIME^Note.6: 500ms, 30ms / 230VAC 1000ms, 30ms / 115VAC at full load
HOLD UP TIME (Typ.): 16ms / 230VAC 16ms / 115VAC at full load

INPUT

VOLTAGE RANGE^Note.7: 80 ~ 264VAC 113 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
EFFICIENCY (Typ.): 84%
AC CURRENT (Typ.): 0.7A / 115VAC 0.35A / 230VAC
INRUSH CURRENT (Typ.): 55A / 230VAC 30A / 115VAC
LEAKAGE CURRENT(max.): Touch current < 50μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 170% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 9.45 ~ 13V Protection type : Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -25 ~ +60℃ (Refer to "Derating Curve")
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -40 ~ +85℃, 10 ~ 95% RH non-condensing
TEMP. COEFFICIENT: ±0.03% / ℃ (0~40℃)
VIBRATION: 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes

SAFETY & EMC (Note. 8)

SAFETY STANDARDS: IEC 60601-1:2005+A1+A2; IEC 60601-1-11:2015+A1, ANSI/AAMI ES60601-1:2005+A2; ANSI/AAMI HA60601-1-11+A1 CAN/CSA C22.2 No. 60601-1:2014+A2; CSA C22.2 NO. 60601-1-11:2015+A1, EAC TP TC 004 approved
ISOLATION LEVEL: Primary-Secondary: 2xMOPP
WITHSTAND VOLTAGE: I/P-O/P:4KVAC
ISOLATION RESISTANCE: I/P-O/P:100M Ohms / 500VDC / 25℃/ 70% RH
EMC EMISSION: Parameter Standard Test Level

Conducted emission FCC PART 15 / CISPR22 Class B
Radiated emission FCC PART 15 / CISPR22 Class B

Parameter	Standard	Test Level
Conducted emission	FCC PART 15 / CISPR22	Class B
Radiated emission	FCC PART 15 / CISPR22	Class B

OTHERS

MTBF: 3887.1K hrs min. Telcordia SR-332 (Bellcore) ; 791.9K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 79*54*33mm (L*W*H)
PACKING: 215g ; 60pcs / 13.9Kg / CARTON

CONNECTOR

PLUG: See page 4~5 ; Other type available by customer requested
CABLE: See page 4~5 ; Other type available by customer requested

Test conditions and notes8

1. All parameters are specified at 115VAC input, rated load, 25℃ 70% RH ambient.
2. DC voltage: The output voltage set at point measure by plug terminal & 50% load.
3. Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1μF & 47μF capacitor.
4. Tolerance: includes set up tolerance, line regulation, load regulation.
5. Line regulation is measured from low line to high line at rated load.
6. Length of set up time is measured at first cold start. Turning ON/OFF the power supply may lead to increase of the set up time.
7. Derating may be needed under low input voltage. Please check the derating curve for more details.
8. The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

GSM25U09-P1J Derating Curve — Derating Curve

GSM25U09-P1J Mechanical Specification — Mechanical Specification

GSM25U09-P1J DC output plug — DC output plug

GSM25U09-P1J G S M 2 5 U series — G S M 2 5 U series

Typical applications

Blood glucose meter
Blood pressure meter
Nebulizer
Inhaler
Portable medical device

Downloads

Datasheet1

GSM25U09-P1J datasheetGSM25U-SPEC.PDF · 2026-04-03 edition PDF Download

Certificates4

UL Certificate (GSM25U)(EN) PDF Download

FCC Certificate (GSM25U)(EN) PDF Download

CB Certificate (GSM25U)(EN) PDF Download

NRCAN Certificate (GSM25U)(EN) PDF Download

Test reports1

Test Report(GSM25U09-P1J)(EN) PDF Download

Catalogues3

Mean Well Medical Catalog PDF Download

Mean Well Adaptor Catalog PDF Download

Mean Well Catalog (Industrial) PDF Download

FAQ

Can I use the GSM25U09-P1J to power a 9V embedded controller or development board?

Yes, this model is a constant-voltage 9V power supply rated for up to 2.77A and 25W. It fits embedded or control electronics that specifically require a regulated 9V DC input and stay within that current and power limit.

Is the GSM25U09-P1J suitable for small industrial monitoring or alarm equipment that runs on 9V DC?

It can be a fit for compact industrial monitoring, alarm, or interface devices that are designed for 9V constant-voltage input. The unit provides up to 25W, so it is intended for lower-power 9V equipment rather than larger loads.

Can this 9V power supply be used for IT or communications accessories that need 9V DC?

Yes, if the accessory is specified for 9V DC constant-voltage input and draws no more than 2.77A. The 80-264VAC input range also helps when the equipment may be used across different AC mains environments.

How do I know if 25W is enough for my 9V device?

This supply is limited to 9V output, 2.77A maximum current, and 25W total power. Your device should match the 9V constant-voltage requirement and remain at or below both the 2.77A and 25W limits.

Is the GSM25U09-P1J appropriate for indoor or outdoor use?

The listed operating temperature is -25°C to +60°C, so the temperature range supports demanding indoor environments. No IP rating is provided in the product data, so the specs do not confirm outdoor exposure to water or dust without additional protection.

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