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White rectangular three pole breaker with toggle switches and lug terminals

SIEMENS

SIEMENS B380 BL Series Miniature Circuit Breaker 80A 3 Pole 240V AC 10kA

SKU CH-T8JF-93875

Three-pole miniature circuit breaker rated 80 A at 240 V AC with a 10 kA interrupting capacity for Siemens P1 panelboards

  • 80 A rating protects three-phase circuits up to 240 V AC
  • 10 kA interrupting capacity clears faults safely at rated voltage
  • Bolt-on mounting fits directly into Siemens P1 panelboards
  • Terminal lugs accept aluminium wire from 2 AWG to 1/0 AWG
  • 125 A frame size in standard BL series form factor

SIEMENS B380 80A Three-Pole Breaker

The SIEMENS B380 is a bolt-on miniature circuit breaker from the BL series rated at 80 amps and 240 volts AC. It provides standard overcurrent protection for three-phase circuits and installs directly into compatible Siemens P1 panelboards with a 10kA interrupting rating at 240V AC.

Suits P1 panelboard retrofits

Electricians wiring Siemens P1 load centers for three-phase distribution will find this breaker matches the bus and mounting style. It is not rated for DC applications and the bolt-on design prevents use in plug-on or other manufacturer panelboards.

80A continuous capacity

The breaker handles 80 amp loads on copper conductors from 4 AWG up to 1/0 AWG or aluminum from 2 AWG up to 1/0 AWG. Its 125A frame size sets the physical limit, so circuits requiring higher ampacity need a larger frame device.

How it compares

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Price $384.99
Pricier than about 90% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

What panelboard series must I already have to mount this BL-series breaker?

It is designed for Siemens P1 panelboards and load-center series P1, bolt-on mounting only.

Can I use 4 AWG copper wire with the 80 A breaker?

Yes, the lug accepts copper from 4 AWG up to 1/0 AWG and aluminium from 2 AWG up to 1/0 AWG.

How do I confirm the breaker trips at the rated 10 kA interrupting capacity?

The toggle will move to the centre trip position during an over-current event; only a calibrated high-current test set can verify the 10 kA rating.

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