MEAN WELL GSM120B20 120W 20V 6A Adaptor

Part numberGSM120B20-R7B Model: GSM120B20
Output voltage 20 V
Rated current 6 A
Rated power 120 W
$79.59Excluding tax and shipping
Ships in 3–5 business daysLead time is the time from order to dispatch, and does not include transit time.
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GSM120B model selection table Desktop (Level VI) — Medical
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Key specifications

Complete technical specifications
Output
Output voltage 20 V
Rated current 6 A
Rated power 120 W
AC input range 80–264 VAC
Typical efficiency 89.5 %
Mechanical
Operating temperature -30 to 70 °C
Power factor correction Supported
Dimensions (L × W × H) 167 × 67 × 35 mm

Is this model right for you?

The GSM120B20 lists 80 ~ 264VAC 113 ~ 370VDC input, the same as the other models in the GSM120B series. They are distinguished by details this page does not carry; the datasheet lists them in full.

Product overview

The GSM120B20 is an AC/DC Adaptor from the MEAN WELL GSM120B series in the Desktop (Level VI) — Medical family. Its input range is 80 ~ 264VAC or 113 ~ 370VDC at 47 ~ 63Hz. The product measures 167 × 67 × 35 mm and has a net weight of 600 g. Operating temperature range is -30 to 70 °C.

Where this model fits

The GSM120B20 is used in Security & Surveillance. Its operating temperature range is -30 to 70 °C, and its dimensions are 167 × 67 × 35 mm with a net weight of 600 g.

Complete technical specifications

Rev. 2026-05-09
Output
Output voltage 20 V
Rated current 6 A
Rated power 120 W
Input
AC input range 80–264 VAC
DC input range 113–370 VDC
Frequency range 47–63 Hz
Typical efficiency 89.5 %
Power factor 0.93
Power factor correction Supported
Environmental
Operating temperature -30 to 70 °C
Storage temperature -40 to 85 °C
Vibration 10 ~ 500Hz, 2G 10min./1cycle, period for 60min. each along X, Y, Z axes
Mechanical
Dimensions (L × W × H) 167 × 67 × 35 mm
Net weight 600.0 g
Safety & compliance
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

These approvals are recorded for the series as a whole. Where a line names particular models or ratings, it applies only to those — read it against this part number, and ask us for the certificate if your approval process needs it.

Identification
Part number GSM120B20
Brand MEAN WELL
Category AC/DC Adaptor
Series GSM120B

Approvals and compliance

From the manufacturer's datasheet for this series

Canada

  • CSA

    Certification to a CSA C22.2 standard, the Canadian counterpart of the UL series. Datasheets cite the specific C22.2 number, which is how you tell a power-supply certificate from a luminaire-controlgear one.

Europe

  • TÜV

    A TÜV certificate is third-party testing against the European EN standard. It is the evidence behind a CE declaration rather than a replacement for it: CE remains the manufacturer's own declaration, and the TÜV report is what makes that declaration defensible.

Eurasian Economic Union

  • EAC

    Conformity with the Eurasian Economic Union technical regulations, covering Russia, Belarus, Kazakhstan, Armenia and Kyrgyzstan. TP TC 004 is the low-voltage regulation and TP TC 020 the electromagnetic-compatibility one, so which number appears tells you what was assessed.

Isolation and electromagnetic compatibility
Withstand voltage I/P-O/P: 4KVAC
EMC emission Parameter Standard Test Level / Note

Standards certified against

  • ANSI/AAMI ES60601-1
  • EN 60601-1
  • EN 60601-1-11
  • IEC 60601-1
  • IEC 60601-1-11
Read the datasheet's exact wording

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

Reproduced unedited from the manufacturer's datasheet. Where an approval covers only some models, the wording says so. Ask us for the certificate itself if your approval process needs it.

Certificates

Certificate copy supplied with this model.

  • CE · R50453592

    100%
    CE certificate R50453592

    CE · Certificate number R50453592

Ordering & shipping information

Order and delivery terms
Part number GSM120B20
SKU GSM120B20-R7B
Minimum order quantity 1
Country of origin China
Typical packed weight 797 g
Unit weight 600 g

Downloads

GSM120B model comparison

View all models
ModelOutput voltageRated currentRated powerPriceAvailability
GSM120B20 20 V6 A120 W$79.59
Ships in 3–5 business days
GSM120B4848 V2.5 A120 W$79.59
Ships in 3–5 business days
GSM120B1515 V7 A105 W$79.59
Ships in 3–5 business days

GSM120B20: 20 V output; the rest of the series runs 12 V to 48 V.

GSM120B20: 6 A output current; the rest of the series runs 2.5 A to 8.5 A.

GSM120B20: 120 W rated power; GSM120B12 and GSM120B12-R7B: 102 W; GSM120B15 and GSM120B15-R7B: 105 W.

GSM120B20: 89.5% typical efficiency; the rest of the series runs 88% to 91.5%.

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Technical data source

Primary source
MEAN WELL
Datasheet revision
2026-05-09
Last verified

View the manufacturer datasheet How we source and verify product data

Specifications are transcribed from the manufacturer datasheet and are subject to change without notice. The current manufacturer datasheet governs in case of any discrepancy.