#121B20-B2M Individual Breaker | Circuit Breakers

121B20-B2M

Circuit Breaker

NSN 5925-01-600-7960

DEMIL
Shelf Life
UOM
NIIN
Demil:
NO
Shelf Life:
UOM:
NIIN:
016007960

Product Technical Spec.

Body Style:
Single pole type
Overall Width:
0.790 inches
Body Length:
1.240 inches
Body Width:
0.790 inches
Body Height:
0.640 inches
Case Material:
Metal
Center To Center Distance Between Terminals Parallel To Length:
0.690 inches
Unthreaded Mounting Hole Diameter:
0.196 inches
Distance Between Centerlines Of Mounting Facilities Parallel To Body Length:
1.560 inches
Boss Height:
0.560 inches
Mounting Surface To Terminal End Distance:
1.250 inches
Pole Quantity:
1
Mounting Facility Type And Quantity:
2 unthreaded hole
Thready Qty Per Inch (tpi):
32
Maximum Continuous Load Current Rating Per Pole:
20.0 amperes dc all locations
Operating Voltage Type And Rating Per Pole In Volts:
14.0 dc all locations and 28.0 dc all locations
Maximum Interrupting Capacity Current Type And Rating Per Pole In Amps:
1.5 dc all locations
Circuit Protection Type:
Overcurrent all locations
Trip Release Method:
Thermal all locations
Trip Release Characteristic:
Time delay all locations
Reset Method:
Automatic
Internal Trip Release Configuration:
Series trip all locations
Thread Size:
0.190 inches
Trip Release Duty Cycle:
Continuous all locations
Trip Release Ambient Tempurature Rating:
-40.0 degrees fahrenheit all locations and 185.0 degrees fahrenheit all locations
Part Name Assigned By Controlling Agency:
Series 12x shortstop circuit breaker, 20amp dc
Thread Series Designator:
Unf
NSN:
5925-01-600-7960
Item Name:
Breaker,individual
Cage Code:
11873

Cross Referenced Parts

Part Number
Cage
RNCC
RNVC
RNAAC
Status
MSDS
SADC
Part Number:
CB-20A
Cage Code:
Z08X2
RNCC:
5
RNVC:
2
RNAAC:
ZA
Status:
A
MSDS:
SADC:
Part Number:
121B20-B2M
Cage Code:
1JY78
RNCC:
3
RNVC:
2
RNAAC:
9Z
Status:
A
MSDS:
SADC:

  We Guarantee with Every Order

  •   100% Genuine Manufacturers Parts
  •   Every Product thoroughly Inspected
  •   Sales Record Retention of 7 years
  •   Fast Delivery
  •   HAZMAT Certified
  •   Global Shipping

Pricing & Availability

Submit this form for current pricing and availability quote on part number 121b20-b2m and/or cross reference parts.
Part / NSN:
Qty:
Your Email:
Phone:
Ref. / PO #:
Company:

We do not share or sell your information to anyone.
Privacy | Terms

Catalog Drilldown
--- Electrical And Electronic Equipment Components
------ Circuit Breakers
--------- Circuit Breakers
------------ P/N 121B20-B2M

New Products Recently updated in circuit breakers

  • 27-10388-1 circuit breaker
    NSN 5925-00-166-3440

    Multipole-single actuator type body style, 0.250 inches bushing length, 1.312 inches body length, 2.140 inches body width, 2.156 inches body height

  • 1536-007-10 circuit breaker
    NSN 5925-00-166-3440

    Multipole-single actuator type body style, 0.250 inches bushing length, 1.312 inches body length, 2.140 inches body width, 2.156 inches body height

  • 314C920G21 circuit breaker
    NSN 5925-00-165-8693

    3 pole quantity, 150.0 amperes ac all locations maximum continuous load current rating per pole, 600.0 ac all locations operating voltage type and rating per pole in volts

  • KA3150 circuit breaker
    NSN 5925-00-165-8693

    3 pole quantity, 150.0 amperes ac all locations maximum continuous load current rating per pole, 600.0 ac all locations operating voltage type and rating per pole in volts

  • 504C336G21 circuit breaker
    NSN 5925-00-165-8693

    3 pole quantity, 150.0 amperes ac all locations maximum continuous load current rating per pole, 600.0 ac all locations operating voltage type and rating per pole in volts

  • BAB1015 circuit breaker
    NSN 5925-00-165-8694

    1 pole quantity, 15.0 amperes ac single location maximum continuous load current rating per pole, 240.0 ac single location operating voltage type and rating per pole in volts


Best-Selling Products A collection of our most popular products

Last Updated: 08/11/2025