SIEMENS
SIEMENS B240 BL Series 40A 2 Pole 120/240V AC Circuit Breaker
A 40 A two-pole breaker rated 120/240 V AC with 10 kA interrupting capacity for Siemens P1 panels
- 40 A rating protects 120/240 V circuits reliably
- 10 kA interrupting capacity handles fault currents safely
- Bolt-on mounting fits Siemens P1 panelboards directly
- Two-pole design controls both legs of single-phase supply
- Lug terminals accept wire down to 8 AWG
SIEMENS BL Series 40 A Two-Pole Breaker
This SIEMENS BL Series miniature circuit breaker provides 40 A overload and short-circuit protection on a 120/240 V AC single-phase supply. It mounts by bolting onto compatible Siemens P1 panelboards and uses a toggle actuator for manual switching. The unit carries a 10 kA interrupting rating at its rated voltage and accepts conductors down to 8 AWG at its lug terminals.
For Siemens P1 panelboard installations needing
Electricians fitting or extending a Siemens P1 load centre will find this breaker matches the required frame size and mounting method. It is not suited for panels that accept only plug-on breakers or for systems requiring a DC voltage rating, and it cannot be used where a higher interrupting capacity is specified.
10 kA interrupting rating at 120/240 V AC
The 10 kA AIR rating is the single figure that determines whether this breaker can safely clear a fault in your installation. Verify that the available fault current at the panelboard does not exceed this value before selecting the device.
Highlights
- 40 A rating protects 120/240 V circuits reliably
- 10 kA interrupting capacity handles fault currents safely
- Bolt-on mounting fits Siemens P1 panelboards directly
- Two-pole design controls both legs of single-phase supply
- Lug terminals accept wire down to 8 AWG
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Does the breaker come with mounting hardware or lugs, or must they be ordered separately?
The unit uses bolt-on mounting and a terminal lug connection; both are integral to the breaker so no separate hardware is required.
Should I select a different ampere rating or pole count for my load center?
This model is fixed at 40 A, 2 pole, 120/240 V AC; choose it only when the circuit requires exactly that rating and your panel is a Siemens P1 series.
What does the 10 kA interrupting rating mean when the breaker is installed in a panel?
It means the breaker can safely clear a fault current up to 10 kA at 120/240 V AC without damage, provided the panel’s available fault current does not exceed that value.
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