W51-A121B1-20
Circuit Breakers, Thermal, Trip-Free - Switchable, Illuminated, Red, Operating
Voltage 125 VAC, Operating Voltage 50 VDC, 20A Current Rating, 1 Pole
W51-A121B1-20
ACTIVE
TE Internal #: 1423673-7
Circuit Breakers, Thermal, Trip-Free - Switchable, Illuminated, Red,
Operating Voltage 125 VAC, Operating Voltage 50 VDC, 20A
Current Rating, 1 Pole
View on TE.com >
Relays & Contactors > Circuit Breakers
Circuit Breaker Type: Thermal
Circuit Function: Trip-Free - Switchable
Illuminated: With
Actuator Color: Red
Operating Voltage: 125 VAC
Features
Product Type Features
Circuit Breaker Style
Angular Button
Actuator Type
Rocker
Circuit Breaker Type
Thermal
Illuminated
With
Configuration Features
Panel Cutout Size
28.5 x 13.5 mm[1.122 x .531 in]
Circuit Function
Trip-Free - Switchable
Number of Poles
1
Electrical Characteristics
Operating Voltage
50 VDC
Current Rating
20 A
Interrupt Capacity
1000A @ 250VAC/50VDC
Body Features
Actuator Color
Red
Contact Features
Trip Time at 200%
4 – 40 seconds
Termination Features
Terminal Configuration
Mechanical Attachment
For support call+1 800 522 6752
6.35 [.25] Straight Quick Connect Tab
05/16/2024 05:46PM | Page 1
W51-A121B1-20
Circuit Breakers, Thermal, Trip-Free - Switchable, Illuminated, Red, Operating
Voltage 125 VAC, Operating Voltage 50 VDC, 20A Current Rating, 1 Pole
Mechanical Attachment
Mounting Options
Snaps Into 1.122 x .531 (28.5 x 13.5) Panel
Cutout
Dimensions
Panel Thickness (Recommended)
.75 – 3 mm[.03 – .118 in]
Identification Marking
Stamped Marking Type
RESET/OFF Printed
Product Compliance
For compliance documentation, visit the product page on TE.com>
EU RoHS Directive 2011/65/EU
Compliant with Exemptions
EU ELV Directive 2000/53/EC
Not Compliant
China RoHS 2 Directive MIIT Order No 32, 2016
Restricted Materials Above Threshold
EU REACH Regulation (EC) No. 1907/2006
Current ECHA Candidate List: JAN 2024
(240)
Candidate List Declared Against: JAN 2024
(240)
SVHC > Threshold:
Cd (1.55% in Component Part)
Article Safe Usage Statements:
Use personal protective equipment as required. Do not eat, drink or smoke when
using this product. Recycle if possible and dispose of the article by following all
applicable governmental regulations relevant to your geographic location.
Halogen Content
Low Halogen - Br, Cl, F, I < 900 ppm per
homogenous material. Also BFR/CFR/PVC
Free
Solder Process Capability
Not applicable for solder process capability
Product Compliance Disclaimer
This information is provided based on reasonable inquiry of our suppliers and represents our current actual knowledge
based on the information they provided. This information is subject to change. The part numbers that TE has identified as
EU RoHS compliant have a maximum concentration of 0.1% by weight in homogenous materials for lead, hexavalent
chromium, mercury, PBB, PBDE, DBP, BBP, DEHP, DIBP, and 0.01% for cadmium, or qualify for an exemption to these
limits as defined in the Annexes of Directive 2011/65/EU (RoHS2). Finished electrical and electronic equipment products
will be CE marked as required by Directive 2011/65/EU. Components may not be CE marked. Additionally, the part
numbers that TE has identified as EU ELV compliant have a maximum concentration of 0.1% by weight in homogenous
materials for lead, hexavalent chromium, and mercury, and 0.01% for cadmium, or qualify for an exemption to these limits
as defined in the Annexes of Directive 2000/53/EC (ELV). Regarding the REACH Regulation, the information TE provides
on SVHC in articles for this part number is based on the latest European Chemicals Agency (ECHA) ‘Guidance on
requirements for substances in articles’ posted at this URL: https://echa.europa.eu/guidance-documents/guidance-onreach
Compatible Parts
For support call+1 800 522 6752
05/16/2024 05:46PM | Page 2
W51-A121B1-20
Circuit Breakers, Thermal, Trip-Free - Switchable, Illuminated, Red, Operating
Voltage 125 VAC, Operating Voltage 50 VDC, 20A Current Rating, 1 Pole
TE Part # 1-1423673-4
TE Part # 175022-1
W51-A122B1-20=CKTBKR,THERM,ROC
250 PL EX REC. 18-14AWG PTBR
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LUMAWISE ENDURANCE S BASE
ASSEMBLY, 80MM
Documents
CAD Files
3D PDF
3D
Customer View Model
ENG_CVM_CVM_1423673-7_E.2d_dxf.zip
English
Customer View Model
ENG_CVM_CVM_1423673-7_E.3d_igs.zip
English
Customer
For support call+1
800 522 View
6752 Model
05/16/2024 05:46PM | Page 3
W51-A121B1-20
Circuit Breakers, Thermal, Trip-Free - Switchable, Illuminated, Red, Operating
Voltage 125 VAC, Operating Voltage 50 VDC, 20A Current Rating, 1 Pole
English
Customer View Model
ENG_CVM_CVM_1423673-7_E.3d_stp.zip
English
By downloading the CAD file I accept and agree to the Terms and Conditions of use.
Datasheets & Catalog Pages
W51 Rocker-Actuated Thermal Circuit Breaker/Power Switch With Optional Indicator Lamp
English
Agency Approvals
CCC Certificate
English
For support call+1 800 522 6752
05/16/2024 05:46PM | Page 4
