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Mean Well GSM120B20-R7B Power Supply 120W 20V 6A

SKU GSM120B20-R7B
$54.00 USD
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GSM120B20-R7B
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Overview

GSM120B20-R7B is the 20V output model of this series: rated current 6A, typical efficiency 89.5%. 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

GSM120B20-R7BSpecifications from the official datasheet (2026-05-09 edition)

OUTPUT

SAFETY MODEL NO.
GSM120B20
DC VOLTAGENote.2
20V
RATED CURRENT
6A
CURRENT RANGE
0 ~ 6A
RATED POWER (max.)
120W
RIPPLE & NOISE (max.)Note.3
150mVp-p
VOLTAGE TOLERANCENote.4
±5.0%
LINE REGULATIONNote.5
±1.0%
LOAD REGULATION
±4.0%
SETUP, RISE TIMENote.6
1500ms, 30ms / 230VAC 2000ms, 30ms / 115VAC at full load
HOLD UP TIME (Typ.)
40ms / 230VAC 24ms / 115VAC at full load

INPUT

VOLTAGE RANGENote.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.)
89.5%
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 ALTITUDENote.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
ParameterStandardTest Level
Conducted emissionBS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22Class B
Radiated emissionBS EN/EN55011 (CISPR11), FCC PART 15 / CISPR22Class B
Harmonic currentBS EN/EN61000-3-2Class A
Voltage flickerBS EN/EN61000-3-3
EMC IMMUNITYNote. 9

BS EN/EN60601-1-2, BS EN/EN61204-3

ParameterStandardTest Level
ESDBS EN/EN61000-4-2Level 4, 15KV air; Level 4, 8KV contact
RF field susceptibilityBS EN/EN61000-4-3Level 3, 10V/m( 80MHz~2.7GHz ) Table 9, 9~28V/m( 385MHz~5.78GHz )
EFT burstsBS EN/EN61000-4-4Level 3, 2KV
Surge susceptibilityBS EN/EN61000-4-5Level 3, 1KV/Line-Line
Conducted susceptibilityBS EN/EN61000-4-6Level 3, 10V
Magnetic field immunityBS EN/EN61000-4-8Level 4, 30A/m
Voltage dip, interruptionBS EN/EN61000-4-11100% 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. 1. All parameters are specified at 230VAC input, rated load, 25℃ 70% RH ambient.
  2. 2. DC voltage: The output voltage set at point measure by plug terminal & 50% load.
  3. 3. Ripple & noise are measured at 20MHz by using a 12" twisted pair terminated with a 0.1 μF & 47μF capacitor.
  4. 4. Tolerance: includes set up tolerance, line regulation, load regulation.
  5. 5. Line regulation is measured from low line to high line at rated load.
  6. 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. 7. Derating may be needed under low input voltage. Please check the derating curve for more details.
  8. 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. 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

GSM120B20-R7B Derating Curve
Derating Curve
GSM120B20-R7B Mechanical Specification
Mechanical Specification
GSM120B20-R7B DC output plug
DC output plug
GSM120B20-R7B ◎ Optional DC plug: (Available in customized cable or…
◎ Optional DC plug: (Available in customized cable or…
GSM120B20-R7B Pin Assignment
Pin Assignment

Typical applications

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

Downloads

FAQ

Can I use the GSM120B20-R7B for a 20V industrial panel PC or HMI?

This model is a constant-voltage 20V power supply rated for up to 6A and 120W. It is suitable for a panel PC or HMI only if that equipment specifically requires 20V DC and its load stays within 6A and 120W.

Is this 20V power supply a fit for embedded computing equipment that needs stable DC output?

Yes, it is intended for equipment that needs a fixed 20V constant-voltage source. With 120W available and a 6A output rating, it fits embedded systems whose input requirement matches 20V DC and stays within those limits.

Can this unit power a 20V display, terminal, or office device used in commercial environments?

It can support commercial or technical equipment that is designed for 20V DC input. The key limits are the fixed 20V output, 6A maximum current, and 120W total output capacity.

Would this work for a 20V automation accessory or control device?

It can be used for automation equipment when the device is specified for 20V DC constant-voltage input. The supply provides up to 6A, so the connected load must remain at or below 120W.

Is the GSM120B20-R7B suitable for outdoor or harsh-environment use?

The listed operating temperature range is -30°C to +70°C, so the temperature tolerance is broad. However, no IP rating is provided in the product specs, so the listing does not state protection against water or dust exposure.

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Other GSM120 Models

1 other model
ModelPower Voltage Current IP RatingPrice
Mean Well GSM120A24-R7B Power Supply 120W 24V 5A 120W 24V 5A IP20$54.01 View
Mean Well GSM Series Power Supply 20V (120~220W) -  - powersupplymall.com
Mean Well

Mean Well GSM120B20-R7B Power Supply 120W 20V 6A

$54.00 USD

GSM120B20-R7B is the 20V output model of this series: rated current 6A, typical efficiency 89.5%. 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

Typical applications

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

Model

  • 120W 20V 3 Pole
  • 120W 20V 2 Pole
  • 160W 20V 3 Pole
  • 160W 20V 2 Pole
  • 220W 20V 2 Pole
View product