Siemens HED42B020 Molded Case Circuit Breaker

This bolt-on breaker is designed for use in Siemens Sentron panelboards, as well as P1, P2, and P3 panelboards, and SB switchboards. It mounts directly to the bus using bolted connections.

Yes, this thermal-magnetic breaker is rated for DC applications up to 250VDC, providing an interrupting capacity of 30kAIC for direct current systems.

The factory-installed lugs accept 14 to 10 AWG copper wire or 12 to 10 AWG aluminum wire. Ensure proper preparation of aluminum conductors with an oxide inhibitor before termination.

Both series share the same physical ED frame footprint and mount into the same panelboards. The difference is the interrupting capacity. Standard ED4 breakers are rated at 18kAIC at 480VAC, while the HED4 series provides a higher interrupting capacity of 42kAIC at 480VAC.

This breaker features a bolt-on connection type. It mounts directly to the busbars of compatible Siemens panelboards using bolted connections, ensuring a secure and reliable electrical contact under high fault conditions.

It utilizes a fixed thermal-magnetic trip unit with LI functions. This provides both long-time (thermal) protection against overloads and instantaneous (magnetic) protection against short circuits.

Yes. Siemens acquired I-T-E and maintained the same physical ED frame dimensions. A modern Siemens HED42B020 can directly replace an older I-T-E breaker with the exact same catalog number in existing panelboards.

When installed in a 240VAC system, the HED42B020 provides a maximum interrupting rating of 100kAIC, making it suitable for high fault current applications where standard 10kAIC or 22kAIC breakers would be insufficient.

It is part of the Siemens ED frame group. This standardized frame size ensures physical compatibility across various ED and HED breaker types within supported Siemens panelboards and switchboards.