Siemens B135 - 35 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens B135 — a 35A, 120V, 1-pole bolt-on molded case circuit breaker designed to protect your electrical system with precision. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, it delivers reliable performance where it matters most.

Why it stands out

• Secure bolt-on mounting: a rigid, vibration-resistant bus connection that stays solid under typical panelboard vibrations and equipment movement.
• Thermal-magnetic trip unit: combines thermal overload protection with magnetic short‑circuit protection for fast, stable, repeatable response to faults.
• OEM-compatible design: engineered to integrate seamlessly with matching Siemens OEM load centers and panelboards for hassle-free installation.
• Versatile applications: ideal for residential, commercial, and light industrial circuits needing dependable 35A protection at 120V.

Key specifications

• Manufacturer: Siemens
• Part Number: B135
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 35A
• Voltage Rating: 120V
• Number of Poles: 1
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases

Use the Siemens B135 to safeguard common branch circuits in your home or business — from lighting runs and receptacle circuits to small equipment feeders. Its bolt-on design suits compatible panelboards, while the 120V, 35A rating aligns with typical residential and light commercial layouts, delivering reliable protection without complicating upgrades.

Installation and compatibility tips

Pair this 1-pole bolt-on breaker with matching Siemens OEM panelboards for optimal performance. Confirm your panelboard is designed for 1-pole molded case breakers and that the amperage aligns with your circuit design. For best results, torque the mounting bolts to the manufacturer’s specifications and test the trip unit during routine inspections to ensure reliable operation.

Why choose Siemens B135?

Siemens brings decades of expertise in protective devices. The B135’s thermal-magnetic trip unit offers stable, repeatable protection—swiftly addressing short circuits while minimizing nuisance trips during normal load fluctuations. The bolt-on construction provides a secure, vibration-resistant connection, reducing maintenance needs and downtime in both new installations and upgrades.

Whether upgrading an aging panel, installing a new service, or stocking a service truck, the B135 35A 120V 1-pole breaker is designed to integrate smoothly with Siemens panelboards and deliver dependable protection where it matters most.