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Siemens / ITE E23B050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Siemens / ITE
E23B050
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
E23B050
Quantity
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Siemens / ITE E23B050 - 50A 3 Pole Molded Case Circuit Breaker
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50A 3 Pole Molded Case Circuit Breaker
50A 3 Pole Molded Case Circuit Breaker
Description
Built for commercial applications, the Siemens E23B050 is a 3-pole, 50A molded case circuit breaker that serves as a vital replacement component. It is engineered to fit perfectly into legacy Siemens P1, P2, and P3 panelboards, as well as SB switchboards and classic ITE panels. This unit mount breaker ensures continued operation of older electrical systems without requiring extensive modifications. Delivering 10kAIC at 240VAC, it utilizes fixed thermal and magnetic (LI) trip functions.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | E23B050-R |
| Series | E |
| Amperage | 50A |
| 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, Padlock Attachment |
|---|---|
| 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, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
8 answersWhich panelboards are compatible with the Siemens E23B050 circuit breaker?
This breaker is designed for use in legacy Siemens P1, P2, and P3 panelboards, as well as SB switchboards and classic ITE panelboards.
Can I install the E23B050 in a standard residential load center?
No. The E23B050 is a bolt-on molded case circuit breaker intended for commercial and industrial panelboards and switchboards, not standard plug-on residential load centers.
What wire sizes are accepted by the load side lugs on the E23B050?
The factory-installed lugs accept copper or aluminum conductors ranging from 10 AWG to 1/0 AWG.
How does the E23B050 mount into the electrical panel?
This is a unit mount, bolt-on circuit breaker that fastens directly to the panelboard bus using bolted connections to ensure a secure fit in high-vibration commercial environments.
Is the E23B050 rated for direct current applications?
Yes. In addition to its standard alternating current rating, this breaker is rated for up to 250VDC with a 10kA interrupting capacity.
What type of trip unit does the E23B050 feature?
It is equipped with a thermal-magnetic trip unit providing fixed long-time and instantaneous (LI) protection against overloads and short circuits.
Is the E23 frame an active or legacy circuit breaker?
The E2 frame is a legacy molded case circuit breaker originally manufactured by ITE and later by Siemens. It is typically sourced as a direct replacement component to maintain existing switchgear without requiring extensive panel modifications.
Why is it important to properly torque the lug connections on the E23B050?
Properly torquing the load side lugs to the manufacturer specifications printed on the breaker label prevents loose connections, which can lead to arcing, overheating, and potential electrical fires.
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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