Siemens B240HH Miniature Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Quantity
Siemens B240HH - 40A 2 Pole Miniature Circuit Breaker
New
Quantity
Description
Designed for systems requiring maximum fault protection, the Siemens B240HH delivers an extra-high 65kAIC interrupting rating at 120/240VAC. This 2-pole, 40A thermal-magnetic circuit breaker belongs to the HBL series and provides robust long-time and instantaneous trip functions. It features a reliable bolt-on mounting configuration that installs into Siemens P1, P2, P3, P4, and P5 panelboards. The unit is HACR rated for commercial heating and cooling equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B240HH |
| Series | BL |
| Amperage | 40A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the B240HH circuit breaker?
This bolt-on miniature breaker is designed for installation in Siemens P1, P2, P3, P4, and P5 panelboards.
What wire gauges are supported by the terminals on the B240HH?
The load-side lugs accept 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
What does the HH suffix indicate in the B240HH part number?
The HH designates this as an HBL type breaker within the Siemens BL family, providing an extra-high interrupting rating of 65kAIC at 120/240V AC for systems with high available fault currents.
How does the B240HH connect to the panelboard bus?
It uses a bolt-on connection rather than a plug-on design. This provides a secure, vibration-resistant mechanical and electrical connection to the panelboard busbars.
What type of fault protection does the B240HH provide?
It features a thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal element protects against sustained overloads, while the magnetic element trips instantly during short circuits.
Can the B240HH replace standard BL or BLH breakers?
Yes, the B240HH shares the same physical footprint and bolt-on mounting as standard BL (10kAIC) and BLH (22kAIC) breakers. It can be used as a direct replacement or upgrade where a 65kAIC rating is required.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 35 reviews.
- TSTom S.Verified BuyerReviewingSiemens B3100 3 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Superbreakers is our go to!
Great prices, great service and quick delivery.
- MGMaggie G.Verified BuyerReviewingSiemens B250 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/24/26Great Service
Came in great condition and in an incredibly timely manner. Will continue superbreakers for all of my orders in the future!
- DBDonnie B.Verified BuyerReviewingSiemens B115 - 15A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26New Breaker
Awesome breaker & Superbreakers is a awesome company!
- BLBrian L.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/4/26Brian
Works great
- JFJoseph F.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/23/26Great value
It was a great value