Siemens / ITE E42B050 Molded Case Circuit Breaker
- 50A
- 2 Pole
- Unit Mount
Quantity
Siemens / ITE E42B050 - 50A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed for demanding industrial environments, this 50-amp Sentron series breaker offers reliable thermal-magnetic trip capabilities. The unit mounts into Siemens P1, P2, and P3 panelboards, along with motor control centers and SB switchboards. With an 18kA interrupting rating at 480V, it provides essential short-circuit and overload defense. This legacy model is fully interchangeable with the ED42B050, making it an ideal exact-fit solution for maintaining existing electrical infrastructure.Specifications
| Brand | Siemens / ITE |
|---|---|
| Series | ED4 |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | E4 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, SB Switchboards, Motor Control Centers |
| 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
7 answersWhich panelboards are compatible with the E42B050 circuit breaker?
The Siemens E42B050 is designed for use in Siemens P1, P2, and P3 panelboards, as well as SB switchboards and motor control centers. It is not interchangeable with standard residential load center breakers.
How does the Siemens E42B050 mount into a panel?
This breaker features a unit mount, bolt-on connection type. It bolts directly to the bus bar in compatible Siemens commercial panelboards and switchboards, rather than snapping into place like a residential plug-on breaker.
Can the E42B050 be used in DC applications?
Yes, the E42B050 is rated for up to 250VDC with an interrupting capacity of 30kAIC. This makes it suitable for specific direct current applications in addition to standard AC systems.
What wire gauge is accepted by the lugs on the E42B050?
The standard lugs on this 50A breaker accept 10 AWG to 1/0 AWG copper or aluminum wire. Ensure proper torque specifications are followed during installation to prevent high-resistance connections.
Is the E42B050 an ITE or Siemens breaker?
It is manufactured by Siemens, which acquired ITE. The breaker may be labeled as Siemens, ITE, or Sentron, but the E42B050 catalog number remains the exact same across these brand names.
Can I use a different brand of breaker to replace the E42B050 in my Siemens panel?
No. To maintain the UL listing of your panelboard and ensure safety, you must use a Siemens or ITE E42B050 or an explicitly UL-classified replacement. Mixing unapproved brands can cause poor connections and fire hazards.
Are the trip settings on the E42B050 adjustable?
No. The E42B050 uses a fixed thermal magnetic trip unit, providing long-time and instantaneous (LI) protection. Both the thermal and magnetic trip elements are fixed and cannot be adjusted in the field.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 20 reviews.
- GGGerson G.Verified BuyerReviewingSiemens ED43B100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26Siemens ED43B100 breeaker
Breaker arrived even earlier than expected. In great condition and very well packaged. Customer service was helpful and resolve all questions.
- KLKristofer L.Verified BuyerReviewingSiemens ED43B015 - 15A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/1/26Product delivered was perfect.
This was my first order with Super Breakers so you just don't know what you will get. My products came quickly and just as described. I was very pleased with my experience and will use them in the future.
- SWScott W.Verified BuyerReviewingSiemens ED43S100A - 100A 3 Pole Molded Case SwitchI recommend this productRated 5 out of 5 stars6/10/26Great transaction
We received the breaker we needed in great shape and in a timely manner!
We will defiantly be ordering from Super breaker again.
- KKKurt k.Verified BuyerReviewingSiemens ED43B080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/18/26Fast shipping
I needed the breaker quickly for a job. It arrived earlier than I expected which kept the job moving along.
- MSmark s.Verified BuyerReviewingSiemens ED41B020 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/16/26Exactly what I ordered
I ordered 12 Siemens breakers. My order was exactly what I ordered, They came fast, and everything was in good shape. I will be using superbreakers in the future.