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Siemens B2100 BL series 100A 2-pole bolt-on breaker, grey toggle, lug terminals

SIEMENS

SIEMENS B2100 Circuit Breaker, BL Series, 100A, 2 Pole, 120/240V AC

SKU CH-B6H3-DATJ8

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.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $240.99
Pricier than about 84% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

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.

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