What panelboards is this breaker compatible with?
Siemens P1 panelboards and compatible BL frame installations
1 actual photo shown first. Reference images are model-matched and must be confirmed before purchase.
Siemens
B370
Miniature Circuit Breaker, 70 A, 240V AC, 3‑Pole, Bolt‑On
Siemens
From $70.71In stock
Product Description
This 3‑pole miniature circuit breaker is designed for Siemens P1 panelboards and provides reliable overcurrent protection for low-voltage distribution. Rated 70 A at 240V AC with a 10 kA interrupt rating, it features a bolt‑on mounting style for secure installation and a toggle actuator for straightforward operation. The BL series thermal magnetic trip unit delivers dependable performance across typical branch circuit applications. Lug terminals support straight‑in wiring to bus bars for clean, efficient panel organization. Dimensions and weight are optimized for panelboard integration, and the unit is CSA certified. Ideal for three‑phase systems requiring a compact, stable breaker form factor compatible with Siemens BL frame devices.
Key Features
- •70 A at 240V AC three phase
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: RFQ
Availability: Sourced on request
Lead time: Quoted after RFQ
Never Used
Price: RFQ
Availability: Sourced on request
Lead time: Quoted after RFQ
Used
Price: $70.71
Availability: 6 in stock
Lead time: Ships from stock
FNFP
Price: RFQ
Availability: 18 in stock
Lead time: Ships from stock
Specifications
- Type
- BL series miniature circuit breaker
- Amperage
- 70 A
- Voltage Rating
- 240V AC
- Number of Poles
- 3
- Phase
- Three
- Interrupt Rating
- 10 kA at 240V AC
- Mounting Style
- Bolt on
- Actuator
- Toggle
- Terminal Connection
- Lug
- For Use With
- Siemens P1 panelboards
- Frame Size
- 125A/BL
- Wire Size
- 8 AWG min, 4 AWG Cu max
- Standards
- CSA certified
- Length
- 12.8 in
- Width
- 4.5 in
- Height
- 3.7 in
- Depth
- 3 in
- Weight
- 0.95 lb
- Country of Origin
- Mexico
- Trip Type
- Thermal magnetic
- Model Number
- B370
- Manufacturer
- Siemens
- Brand
- Siemens
- Part #
- B370
- Category
- Circuit Breaker
- Subcategory
- Molded Case Circuit Breaker
- Weight
- 1.00 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
DHL, FedEx, UPS, or forwarder options can be quoted with packing photos and tracking details.
Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
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We are not an authorized distributor, reseller, or representative of Siemens, Mitsubishi, Omron, or other manufacturers listed on this site. All product names, trademarks, brands, and logos are the property of their respective owners. Products may be used, refurbished, surplus, or sourced from the secondary market unless otherwise stated.
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FAQ
What is the interrupt rating?
10 kA at 240V AC
How is it mounted?
Bolt‑on mounting with lug terminals
What trip mechanism does it use?
Thermal magnetic trip
What are the dimensions?
Approximately 3.7 in height, 4–4.5 in width, 12.8 in length, 3 in depth
What wire sizes are supported?
8 AWG minimum and up to 4 AWG copper maximum