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circuit-breaker
Siemens B340 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState
★★★★★
| Part Number | B340 |
| Amperes | 40 |
| Poles | 3 |
| Voltage | 240 |
| Product Type | circuit-breaker |
Regular price
$710.00
Sale price
$710.00
Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Siemens B340 - 40 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState
Regular price
$710.00
Sale price
$710.00
Regular price
Unit price
Product description
Shipping
Meet the Siemens B340 — a 40A, 240V, 3-pole bolt-on molded case circuit breaker crafted to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built for steady, long-term performance, it’s a reliable choice for complex electrical setups where safety and uptime matter.
- Secure bolt-on mounting provides a rigid, vibration-resistant connection to the bus, helping maintain consistent electrical contact even in demanding environments.
- Thermal-magnetic trip unit delivers stable, repeatable protection by responding to both overloads and short circuits, reducing nuisance trips and providing predictable performance across temperature variations.
- OEM-ready compatibility designed to work with matching Siemens OEM load centers and panelboards, simplifying installation and ensuring coordinated protection strategies.
- Versatile application suitable for residential, commercial, and light industrial panels where dependable protection is required for branch circuits.
- Part Number B340 from Siemens, a trusted name in electrical protection equipment.
Why this breaker stands out: the bolt-on design minimizes connection play and vibration, which translates to a more reliable bus connection over time. The thermal-magnetic trip unit provides a clear, consistent response to faults, helping prevent damage to wiring and connected equipment. When your panelboard or load center specifies a bolt-on molded case breaker, the Siemens B340 is engineered to fit and perform as expected, without the guesswork of aftermarket substitutes.
Use cases and ideal applications
- Installing or upgrading panelboards and load centers that require bolt-on MCCBs
- Protecting branch circuits in residential subpanels, commercial electrical rooms, and light industrial installations
- Replacing aging or incompatible breakers with a compatible Siemens solution to maintain system protection alignment
Technical snapshot
- Amperage rating: 40 A
- Voltage rating: 240 V
- Number of poles: 3
- Mounting style: Bolt-on
- Type: Thermal-magnetic molded case circuit breaker
- Manufacturer: Siemens
- Part number: B340
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