Siemens HEB3B100 Bolt-On 3-Phase Circuit Breaker

Siemens HEB3B100 Bolt-On 3-Phase Molded Case Circuit Breaker delivers 100 A of protection in a compact 3-pole bolt-on package for low-voltage distribution panels, designed for Siemens‑compatible gear and for straightforward field replacement in motor feeders, switchboards, and panelboards. This HEB-series MCCB uses a thermal-magnetic trip to provide both long-time and instantaneous overcurrent protection, with a voltage rating of up to 600 V AC and an interrupting capacity of 65 kA at 480 V, making it suitable for moderate-to-heavy motor loads and feeder protection. The unit is built with load-side lug terminals for secure conductor connections, supports bolt-on mounting, and carries a 40 °C ambient temperature rating, aligning with common industrial installation practices and enabling reliable protection in standard environments. As a Type HEB device, this 3P 100 A breaker is intended for use in compact, modular protective schemes where a field-serviceable bolt-on MCCB is required to protect feeders and motors, while maintaining Siemens’ compatibility with other HEB-series components.