Part of the legacy E-Frame series, the Siemens E23B035 is a 3-pole, 35A molded case circuit breaker for commercial applications. It provides reliable thermal-magnetic protection with fixed long-time and instantaneous trip functions. This unit mount MCCB serves as an exact drop-in replacement, fitting seamlessly into Siemens P1, P2, and P3 panelboards, as well as SB switchboards. Rated for 10kAIC at 240VAC, this HACR-rated breaker supports reverse feed installations and uses 10-1/0 AWG lugs.
Which panelboards are compatible with the E23B035 circuit breaker?
This bolt-on breaker is compatible with Siemens P1, P2, and P3 panelboards, SB switchboards, and legacy ITE panelboards.
How is the E23B035 connected within the panel?
It is a unit mount, bolt-on breaker. The line side bolts directly to the panel bus, while the load side features lugs that accept 10 AWG to 1/0 AWG copper or aluminum wire.
Can I use this Siemens breaker to replace an older ITE E23B035?
Yes. Siemens acquired ITE and maintained the same E2 frame architecture and catalog numbers. A Siemens E23B035 is a direct, interchangeable replacement for a legacy ITE breaker with the exact same part number.
Is this E-frame breaker rated for direct current (DC) systems?
Yes, in addition to its standard alternating current rating, it is rated for up to 250VDC with a 10kA interrupting capacity for use in direct current applications.
Are the thermal and magnetic trip settings adjustable on this model?
No. The E23B035 features a fixed thermal-magnetic trip unit. The Long-Time (thermal) and Instantaneous (magnetic) protection settings are factory calibrated and cannot be adjusted in the field.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 25 reviews.
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Based on 25 reviews
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Total 4 star reviews: 1
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Reviews Summary
Generated by AI from 30 most recent customer reviews
Last updated 8/15/25
Customers say this electrical breaker meets their expectations in terms of functionality and performance. Many reviews mention quick delivery times and competitive pricing. While one user reports voltage detection issues, most find these units work effectively. Common feedback includes satisfaction with product condition upon arrival and straightforward installation. Reviews indicate availability of specialty models that are often hard to find through local suppliers.