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Siemens / ITE E23B040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Unit Mount
Siemens / ITE
E23B040
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
E23B040
Quantity
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Siemens / ITE E23B040 - 40A 3 Pole Molded Case Circuit Breaker
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40A 3 Pole Molded Case Circuit Breaker
40A 3 Pole Molded Case Circuit Breaker
40A 3 Pole Molded Case Circuit Breaker
Description
Rated for 10kAIC at 240VAC, the Siemens E23B040 is a 3-pole, 40A molded case circuit breaker designed 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 for discontinued ITE and Siemens E-Frame models. It installs seamlessly into older P1, P2, and P3 panelboards, as well as SB switchboards. The HACR-rated breaker supports reverse feed installations.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | E23B040-R |
| Series | E |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 250VDC |
| Frame Type | E2 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, SB Switchboards, ITE Panelboards |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, CSA C22.2 No. 5, IEC 60947-2 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, HID Rated |
Product FAQs
7 answersWhich panelboards are compatible with the E23B040 circuit breaker?
This E2 frame breaker is designed for use in Siemens P1, P2, and P3 panelboards, SB switchboards, and legacy ITE panelboards.
What wire sizes are accepted by the load side lugs on this breaker?
The factory installed load lugs accept wire gauges from 10 AWG up to 1/0 AWG. They are rated for both copper and aluminum conductors.
Is this breaker suitable for direct current applications?
Yes, it carries a DC rating of 250VDC with a 10kA interrupting capacity, making it suitable for specific direct current systems.
How is the E23B040 secured within a panel?
It features a unit mount, bolt-on connection type. It bolts directly to the busbar or mounting assembly in compatible Siemens and ITE enclosures.
Can this Siemens breaker replace older ITE branded E23B040 units?
Yes. Siemens acquired ITE and continues to manufacture these E2 frame breakers to the same physical and electrical specifications for direct replacement in existing systems.
Are the trip settings adjustable on this E-frame breaker?
No, the thermal magnetic trip unit features fixed long-time and fixed instantaneous trip functions. They cannot be adjusted in the field.
What does the E2 frame designation mean for this breaker?
The E2 frame indicates the physical dimensions and mounting footprint of the breaker. It ensures the unit will properly align with the bus connections in legacy ITE and modern Siemens E-frame panel spaces.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 25 reviews.
Total 5 star reviews: 24 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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.
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Rating
25 reviews
- MGMike G.Rated 5 out of 5 stars11/27/23Just what we needed and
Just what we needed and fast shipping
- TETimothy E.ReviewingSquare D HU364 Safety SwitchI recommend this productRated 5 out of 5 stars5/9/22quick response!!!!
quick response!!!!
- DGDavid G.ReviewingSquare D HU362 Safety SwitchI recommend this productRated 5 out of 5 stars4/13/22Great service and fast shipping
Great service and fast shipping
- WEWarren E.ReviewingSquare D HU361 Safety SwitchI recommend this productRated 5 out of 5 stars3/1/22600v Disconnect
They have GREAT Inventory! Even my Local suppliers did not have them in stock.
- SKSaki K.ReviewingSquare D HU361 Safety SwitchI recommend this productRated 5 out of 5 stars2/20/22Good product
Good product in good price