Siemens HEB3B125B - 125 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens HEB3B125B is a 3‑pole bolt‑on molded case circuit breaker rated for 125 A and 600 V. Designed to safeguard branch circuits in panelboards and loadcenters, this unit delivers dependable protection with a robust, vibration‑resistant connection and a precise thermal‑magnetic trip mechanism.

• Bolt‑on mounting: provides a secure, rigid bus connection that resists movement and loosening in demanding electrical environments.
• Thermal‑magnetic trip unit: combines overload and short‑circuit protection with stable, repeatable performance across operating conditions.
• 3‑pole design for comprehensive line protection in multi‑phase circuits, suitable for 125 A branch protections at 600 V.
• OEM compatibility: engineered to fit matching Siemens loadcenters and panelboards, ensuring a clean, reliable retrofit or replacement.
• Versatile application: ideal for residential service panels, commercial electrical enclosures, and light industrial distribution where solid branch‑circuit protection is required.

Why this matters: with the HEB3B125B, you gain a protective device that stays reliable under vibration, maintains consistent trip characteristics, and integrates seamlessly into Siemens‑equipped panels. It’s a dependable choice when you need precise interruption of fault currents and firm, long‑lasting connections in a compact, bolt‑on format.

Technical snapshot:

• Manufacturer: Siemens
• Part Number: HEB3B125B
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 125 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt‑on
• Application: Branch circuit overcurrent and short‑circuit protection

Available from AmpState, the Siemens HEB3B125B equips your panel with proven protection you can trust—ready for residential, commercial, and light industrial deployments where reliability and compatibility matter most.