Designed for commercial facilities, the Siemens HE43B030 is a 30A molded case circuit breaker. It provides dependable protection for three-phase systems. This bolt-on MCCB fits Siemens P1, P2, and P3 panelboards, plus older ITE enclosures. It replaces legacy HE-frame installations, with the HED43B030 as its current substitute. The breaker features a 25kA interrupt capacity at 480VAC and is HID rated for lighting applications. It utilizes a trip-free mechanism to ensure safety during faults.
What panelboards accept the HE43B030 circuit breaker?
This bolt-on breaker is compatible with Siemens P1, P2, and P3 panelboards, as well as legacy ITE panelboards.
Is the HE43B030 interchangeable with older ITE breakers?
Yes, the HE43B030 is a legacy HE frame circuit breaker originally manufactured by ITE. Siemens acquired ITE and continued producing this exact frame, making it a direct drop-in replacement for older ITE enclosures.
What is the current production replacement for the HE43B030?
The HED43B030 is the modern substitute for legacy HE frame installations requiring a 30A, 3-pole breaker with a 25kAIC rating at 480VAC.
Can the HE43B030 be used in direct current (DC) systems?
Yes, in addition to its AC ratings, this thermal magnetic breaker is rated for up to 250VDC applications.
How does the interrupting capacity change between 240V and 480V applications?
The HE43B030 provides a maximum interrupting capacity of 65kAIC when used on 240VAC systems, which drops to 25kAIC when applied to 480VAC systems.
Are the trip settings adjustable on the HE43B030?
No, this breaker features fixed thermal and fixed magnetic trip elements for both long-time and instantaneous protection.
What wire sizes and materials are compatible with the HE43B030 lugs?
The factory lugs accept 10 AWG to 1/0 AWG conductors and are rated for both copper (Cu) and aluminum (Al) wire.
How does the HE43B030 mount inside the panelboard?
This is a bolt-on MCCB. It secures directly to the panelboard busbars using bolted connections, providing a more secure mechanical and electrical joint than plug-in alternatives.
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