Mean Well GSM120B48-R7B Power Supply 120W 48V | Mean Well USA

Name: Mean Well GSM120B48-R7B Power Supply 120W 48V 2.5A
Brand: Mean Well
SKU: GSM120B48-R7B
Price: 60.0 USD
Availability: InStock

Overview

GSM120B48-R7B is the 48V output model of this series: rated current 2.5A, typical efficiency 91.5%. Type R7B: Standard model,Power DIN 4Pin with lock type.

GSM120B is a highly reliable, 120W desktop style single-output green medical adaptor series. This product is equipped with a 2-pin (no FG) standard IEC320-C8 power plug, adopting the input range from 80VAC to 264VAC. The entire series supplies different output voltages between 12VDC and 48VDC that can satisfy the demands for various kinds of medical electrical devices. The circuitry design meets the international medical standards (2*MOPP), having an ultra low leakage current (<100 μA), fitting the medical devices in direct electrical contact with the patients. With the efficiency up to 91.5% and the extremely low no-load power consumption below 0.15W, GSM120B is compliant with USA EISA 2007/DoE, Canada NRCan, Australia and New Zealand MEPS, EU ErP,and meet Code of Conduct (CoC) Version 5. The supreme 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. GSM120B is approved with the international medical safety certificates.

Features

2 pole AC inlet IEC320-C8, Class Ⅱ power unit
Medical safety approved (2 x MOPP) according to ANSI/AAMI ES60601-1/-1-11 and IEC/BS EN/EN60601-1/-1-11
Extremely low leakage current
No load power consumption<0.15W
Energy efficiency level VI and meet CoC Version 5
-30~+70℃ wide range working temperature
Protections: Short circuit / Overload / Over voltage / Over temperature
LED indicator for power on
Lifetime> 105 K hours
Various DC plug quick adaptor accessory available (Plug kit sold sperately, please refer to : https://www.meanwell.com/upload/pdf/DC_plug.pdf)
3 years warranty

Specifications

GSM120B48-R7BSpecifications from the official datasheet (2026-05-09 edition)

OUTPUT

SAFETY MODEL NO.: GSM120B48
DC VOLTAGE^Note.2: 48V
RATED CURRENT: 2.5A
CURRENT RANGE: 0 ~ 2.5A
RATED POWER (max.): 120W
RIPPLE & NOISE (max.)^Note.3: 200mVp-p
VOLTAGE TOLERANCE^Note.4: ±2.5%
LINE REGULATION^Note.5: ±1.0%
LOAD REGULATION: ±2.5%
SETUP, RISE TIME^Note.6: 1500ms, 30ms / 230VAC 2000ms, 30ms / 115VAC at full load
HOLD UP TIME (Typ.): 40ms / 230VAC 24ms / 115VAC at full load

INPUT

VOLTAGE RANGE^Note.7: 80 ~ 264VAC 113 ~ 370VDC
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.93 / 230VAC PF>0.97 / 115VAC at full load
EFFICIENCY (Typ.): 91.5%
AC CURRENT (Typ.): 1.4A / 115VAC 0.7A / 230VAC
INRUSH CURRENT (Typ.): Cold start 35A / 115VAC 70A / 230VAC
LEAKAGE CURRENT(max.): Touch current < 100 μA/264VAC

PROTECTION

OVERLOAD: 105 ~ 160% rated output power Protection type : Hiccup mode, recovers automatically after fault condition is removed
OVER VOLTAGE: 105 ~ 135% rated output voltage Protection type : Shut down o/p voltage, re-power on to recover
OVER TEMPERATURE: Shut down o/p voltage, re-power on to recover

ENVIRONMENT

WORKING TEMP.: -30 ~ +70℃ (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
OPERATING ALTITUDE^Note.8: 3000 meters

SAFETY & EMC

SAFETY STANDARDS: IEC 60601-1:2005+A1+A2; IEC 60601-1-11:2015+A1,TUV BS EN/ EN 60601-1:2006+A1+A12+A2; BS EN/ EN 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 BS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22 Class B
Radiated emission BS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22 Class B
Harmonic current BS EN/EN61000-3-2 Class A
Voltage flicker BS EN/EN61000-3-3
EMC IMMUNITY^{Note. 9}: BS EN/EN60601-1-2, BS EN/EN61204-3

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility BS EN/EN61000-4-3 Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts BS EN/EN61000-4-4 Level 3, 2KV
Surge susceptibility BS EN/EN61000-4-5 Level 3, 1KV/Line-Line
Conducted susceptibility BS EN/EN61000-4-6 Level 3, 10V
Magnetic field immunity BS EN/EN61000-4-8 Level 4, 30A/m
Voltage dip, interruption BS EN/EN61000-4-11 100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

Parameter	Standard	Test Level
Conducted emission	BS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22	Class B
Radiated emission	BS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22	Class B
Harmonic current	BS EN/EN61000-3-2	Class A
Voltage flicker	BS EN/EN61000-3-3

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibility	BS EN/EN61000-4-3	Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT bursts	BS EN/EN61000-4-4	Level 3, 2KV
Surge susceptibility	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line
Conducted susceptibility	BS EN/EN61000-4-6	Level 3, 10V
Magnetic field immunity	BS EN/EN61000-4-8	Level 4, 30A/m
Voltage dip, interruption	BS EN/EN61000-4-11	100% dip 1 periods, 30% dip 25 periods, 100% interruptions 250 periods

OTHERS

MTBF: 2546.9K hrs min. Telcordia SR-332 (Bellcore) ; 372.0K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 167*67*35mm (L*W*H)
PACKING: 0.6Kg; 20pcs/13,0Kg/0.89CUFT

CONNECTOR

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

MODEL ENCODING

R7B (this model): Standard model,Power DIN 4Pin with lock type
Blank: Other options available by customer requested (see Page 4~5)

Test conditions and notes9

1. All parameters are specified at 230VAC 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 0.1 μF & 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 ambient temperature derating of 3.5 ℃/1000m with fanless models and of 5 ℃/1000m with fan models for operating altitude higher than 2000m(6500ft).
9. 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

GSM120B48-R7B Derating Curve — Derating Curve

GSM120B48-R7B Mechanical Specification — Mechanical Specification

GSM120B48-R7B DC output plug — DC output plug

GSM120B48-R7B ◎ Optional DC plug: (Available in customized cable or… — ◎ Optional DC plug: (Available in customized cable or…

GSM120B48-R7B Pin Assignment — Pin Assignment

Typical applications

Mobile clinical workstation
Oral irrigator
Portable hemodialysis machine
Breath Machine
Medical computer monitor

Downloads

Datasheet1

GSM120B48-R7B datasheetGSM120B-SPEC.PDF · 2026-05-09 edition PDF Download

Certificates7

EMC Certificate (ELG-75)(EN) PDF Download

CB Certificate (GSM120B)(EN) PDF Download

TUV Certificate (GSM120B)(EN) PDF Download

EMC Certificate (GSM120B)(EN) PDF Download

FCC Certificate (GSM120B)(EN) PDF Download

NRCan Certificate(GSM120B)(EN) PDF Download

UL Certificate(GSM120B)(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 GSM120B48-R7B for 48V telecom or network equipment?

This supply provides constant-voltage 48V DC output with a maximum of 2.5A and 120W. It is appropriate for telecom or network equipment only when the device requires 48V DC and its load stays within 2.5A.

Is this 48V power supply suitable for industrial communication hardware?

Yes, for equipment that is designed for a fixed 48V DC source. The available output is 120W total, with current limited to 2.5A.

Can this model power a 48V control or monitoring device in an industrial setting?

It can power industrial control or monitoring devices that specifically call for 48V DC constant-voltage input. The load must remain at or below 2.5A and 120W.

Would the GSM120B48-R7B fit a 48V embedded system or appliance?

It fits embedded systems or appliances that require 48V DC and do not exceed the unit's 2.5A output rating. Because it is a constant-voltage model, the application needs to match a fixed 48V supply.

Is this unit rated for outdoor exposure or washdown areas?

The operating temperature range is -30°C to +70°C, so the thermal range is wide. However, the product information does not provide an IP rating, so the listing does not confirm protection against direct water or dust exposure.

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Mean Well GSM120B48-R7B Power Supply 120W 48V 2.5A

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Overview

Features

Specifications

OUTPUT

INPUT

PROTECTION

ENVIRONMENT

SAFETY & EMC

OTHERS

CONNECTOR

MODEL ENCODING

Technical drawings

Typical applications

Downloads

Datasheet1

Certificates7

Catalogues3

FAQ

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Mean Well GSM120B48-R7B Power Supply 120W 48V 2.5A

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