Engineered for older commercial power systems, the Siemens HE3B070 is a 70A, 3-pole molded case circuit breaker delivering robust thermal-magnetic protection for classic HE-frame infrastructure. This bolt-on breaker mounts into Siemens P1, P2, and P3 panelboards. It offers a true drop-in replacement experience without requiring aftermarket adapters, and can be substituted by the HED43B070 for newer projects. With a 25kAIC interrupt capacity at 480VAC, the HACR-rated unit provides fixed LI trips.
HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip
Product FAQs
5 answers
Which panelboards are compatible with the HE3B070 circuit breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards.
What wire sizes are accepted by the lugs on this breaker?
The standard lugs accept wire gauges from 10 AWG up to 1/0 AWG and are rated for both copper and aluminum conductors.
Is the HE3B070 rated for direct current applications?
Yes, it carries a DC rating of 250VDC with an interrupting capacity of 10kAIC.
Are the trip settings on the HE3B070 adjustable?
No, this breaker features a thermal magnetic trip unit with fixed thermal and fixed magnetic settings for long time and instantaneous protection.
Is the HE frame series still in active production?
The HE frame is classified as a legacy molded case circuit breaker. It is typically sourced for replacing existing units in older Siemens or ITE installations.
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