Image shown is a representation only. Exact specifications should be obtained from the product datasheet.

Mean Well GSM120A20-R7B Power Supply 120W 20V 6A

Name: Mean Well GSM120A20-R7B Power Supply 120W 20V 6A
Brand: Mean Well
SKU: GSM120A20-R7B
Price: 60.42 USD
Availability: InStock

SKU GSM120A20-R7B

$60.42 USD

Shipping calculated at checkout.

Select model — 5 in this family

GSM120A20-R7B

GSM120B20-R7B 2 Pole Backorder$60.00 USD

GSM120A20-R7B 3 Pole Backorder$60.42 USD

GSM160B20-R7B 2 Pole Low stock$67.95 USD

GSM160A20-R7B 3 Pole Low stock$70.86 USD

GSM220B20-R7B 2 Pole Low stock$97.96 USD

Product variants

Available to order

Overview

GSM120A20-R7B is the 20V output model of this series: rated current 6A, typical efficiency 89%. Type R7B: Standard model,Power DIN 4Pin with lock type.

GSM120A is a highly reliable, 120W desktop style single-output green medical adaptor series. This product is equipped with a 3-pin (with FG) standard IEC320-C14 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, GSM120A 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. GSM120A is approved with the international medical safety certificates.

Features

3 pole AC inlet IEC320-C14, ClassⅠpower unit
Medical safety approved (2 x MOPP) according to ANSI/AAMI ES60601-1 and IEC/BS EN/EN60601-1
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> 95 K hours
Various DC plug quick adapter accessory available (Plug kit sold seperate, please refer to : https://www.meanwell.com/upload/pdf/DC_plug.pdf)
3 years warranty

Specifications

GSM120A20-R7BSpecifications from the official datasheet (2026-05-09 edition)

OUTPUT

SAFETY MODEL NO.: GSM120A20
DC VOLTAGE^Note.2: 20V
RATED CURRENT: 6A
CURRENT RANGE: 0 ~ 6A
RATED POWER (max.): 120W
RIPPLE & NOISE (max.)^Note.3: 180mVp-p
VOLTAGE TOLERANCE^Note.4: ±5.0%
LINE REGULATION^Note.5: ±1.0%
LOAD REGULATION: ±4.0%
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
FREQUENCY RANGE: 47 ~ 63Hz
POWER FACTOR (Typ.): PF>0.93 / 230VAC PF>0.97 / 115VAC at full load
EFFICIENCY (Typ.): 89%
AC CURRENT (Typ.): 1.4A / 115VAC 0.7A / 230VAC
INRUSH CURRENT (Typ.): Cold start 35A / 115VAC 70A / 230VAC
LEAKAGE CURRENT(max.): Earth leakage current < 115μA/264VAC , Touch current <100μA/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,TUV BS EN/ EN 60601-1:2006+A1+A12+A2,ANSI/AAMI ES60601-1:2005/A2:2021, CAN/CSA C22.2 No. 60601-1:2014+A2,EAC TP TC 004 approved
ISOLATION LEVEL: Primary-Secondary: 2xMOPP, Primary-Earth: 1xMOPP
WITHSTAND VOLTAGE^{Note. 9}: I/P-O/P:4KVAC I/P-FG:2KVAC O/P-FG:0.5KVAC
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: 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, 2KV/Line-FG
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, 2KV/Line-FG
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: 2413.9K hrs min. Telcordia SR-332 (Bellcore) ; 388.5K 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 notes10

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 0.1μF & 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 voltages. Pleas 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. Optional for 1.5KVAC with BF rated.
10. 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

GSM120A20-R7B Derating Curve — Derating Curve

GSM120A20-R7B Mechanical Specification — Mechanical Specification

GSM120A20-R7B DC output plug — DC output plug

GSM120A20-R7B ◎ Optional DC plug: (Available in customized cable or… — ◎ Optional DC plug: (Available in customized cable or…

GSM120A20-R7B Pin Assignment — Pin Assignment

Typical applications

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

Downloads

Datasheet1

GSM120A20-R7B datasheetGSM120A-SPEC.PDF · 2026-05-09 edition PDF Download

Certificates6

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

CB Certificate (GSM120A)(EN) PDF Download

TUV Certificate (GSM120A)(EN) PDF Download

EMC Certificate (GSM120A)(EN) PDF Download

FCC Certificate (GSM120A)(EN) PDF Download

UL Certificate(GSM120A)(EN) PDF Download

Test reports1

Test Report(GSM120A20-R7B)(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 GSM120A20-R7B for a 20V industrial panel PC or HMI?

Yes, this model is a constant-voltage 20V power supply for equipment that requires regulated 20V DC. It can provide up to 6A with 120W total output, so the connected load needs to stay within those limits.

Is this power supply suitable for a 20V embedded computer or edge device?

It can be a fit for embedded or edge hardware that is designed for 20V constant-voltage input. The available output is 20V at up to 6A, with 120W total capacity.

Can I use this in an automation or control system that needs 20V DC?

Yes, if the automation device or subsystem is specified for 20V DC constant-voltage input. This unit delivers up to 6A and 120W, and it accepts 80-264VAC input on the AC side.

Will the GSM120A20-R7B work for 20V bench, test, or instrumentation equipment?

It can work for test or instrumentation equipment that calls for a fixed 20V DC supply. The output is regulated constant voltage at 20V, with a maximum of 6A and 120W.

Is the GSM120A20-R7B appropriate for outdoor or harsh-temperature use?

The published operating temperature range is -30°C to +70°C, with output derating at higher ambient temperatures per the derating curve. The provided specs do not list an IP rating, so outdoor or wet-location suitability is not stated here.

Payment & Security

Payment methods

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Please log in to write a review.

{ "id":8655650554176, "variants" :[{ "context":"default", "variant_id": 46624865976640, "sku":"GSM120A20-R7B", "inventory_qty" : 0, "customer" :true, "custom_html" :"\u003cdiv class=\"price\"\u003e\n \u003cdiv class=\"price__default\"\u003e\n \u003cstrong class=\"price__current\"\u003e$60.42\u003c\/strong\u003e\n \u003cs class=\"price__was\"\u003e\u003c\/s\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"unit-price relative\" hidden\u003e\u003cspan class=\"visually-hidden\"\u003eUnit price\u003c\/span\u003e\u003cspan class=\"unit-price__price\"\u003e\u003c\/span\u003e\u003cspan class=\"unit-price__separator\"\u003e \/ \u003c\/span\u003e\u003cspan class=\"unit-price__unit\"\u003e\u003c\/span\u003e\u003c\/div\u003e\n\n \u003cdiv class=\"price__no-variant\" hidden\u003e\n \u003cstrong class=\"price__current\"\u003eUnavailable\u003c\/strong\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e", "volume_html" :"\u003cvolume-pricing class=\"parent-display inside_product_form\" id=\"volume-pricing-main\" \u003e\u003c\/volume-pricing\u003e" } ] }