SIEMENS
SIEMENS B2100 Circuit Breaker, BL Series, 100A, 2 Pole, 120/240V AC
Two-pole miniature breaker rated 100 A at 120/240 V AC with 10 kA interrupting capacity for Siemens P1 panels
- Rated 100 A for high-demand circuits
- 10 kA interrupting capacity at 120/240 V AC
- Two-pole design protects both hot legs
- Bolt-on mounting fits Siemens P1 panelboards
- 125 A frame size with lug terminals accepts 2 AWG Al or 4 AWG Cu
SIEMENS B2100 BL Series Circuit Breaker
The SIEMENS B2100 is a miniature circuit breaker from the BL series rated at 100 amps for 120/240V AC single-phase systems. It uses a bolt-on mounting style with a toggle actuator and fits Siemens P1 panelboards. The frame size is 125A with a standard circuit breaker type.
Interrupting Rating and Voltage Limits
This breaker carries a maximum AIR rating of 10kA at 120/240V AC, which defines its short-circuit interrupting capacity. It has no DC voltage rating, so it cannot be used in direct current applications. The voltage rating restricts use to compatible single-phase AC panels only.
100 Amp Two-Pole Protection
The two-pole design provides 100 amp overcurrent protection across both poles for 120/240V circuits. Terminal lugs accept a minimum of 2 AWG aluminium or 4 AWG copper conductors. Buyers needing a different amperage, pole count, or DC rating must select another model.
Highlights
- Rated 100 A for high-demand circuits
- 10 kA interrupting capacity at 120/240 V AC
- Two-pole design protects both hot legs
- Bolt-on mounting fits Siemens P1 panelboards
- 125 A frame size with lug terminals accepts 2 AWG Al or 4 AWG Cu
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
How do I choose between the 100 A and 125 A frame sizes for my Siemens P1 panelboard?
This breaker is rated 100 A and fits the 125 A frame BL series; select the 100 A version when your circuit load calls for 100 A protection, and use the 125 A frame size only if the panelboard schedule specifies that frame.
What does the 10 kA AIR rating mean once the breaker is installed in a 120/240 V AC panel?
The 10 kA AIR rating means the breaker can safely interrupt up to 10 000 A of short-circuit current at 120/240 V AC, so it will protect the downstream wiring if a fault reaches that level.
Which panelboard standard does the bolt-on BL series meet, and what voltage does it cap in practice?
The bolt-on BL series is built for Siemens P1 panelboards and is rated for 120/240 V AC single-phase systems; it is not rated for DC voltages.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
