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Siemens ED43M050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Siemens
ED43M050
Molded Case Circuit Breaker
Brand
Siemens
SKU
ED43M050
Quantity
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Siemens ED43M050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Designed for industrial power distribution, the Siemens ED43M050 is a 3-pole, 50A molded case circuit breaker utilizing thermal-magnetic technology for high-temperature settings. This bolt-on device fits Siemens P1 through P5 panelboards and switchboards. The ED4 frame provides a secure connection for demanding infrastructure. Interrupting 18kA at 480VAC, it includes a 50°C ambient calibration. The breaker is HACR rated, allows reverse feeding, and features a fixed trip unit.Specifications
| Brand | Siemens |
|---|---|
| Series | ED4 |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | ED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards, Switchboards |
| 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, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 50C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhat does the "M" in the ED43M050 catalog number signify?
The "M" indicates that this breaker features a 50 degree Celsius ambient temperature calibration. This is designed for high-temperature environments, unlike standard ED4 frame breakers with a "B" designation which are calibrated for 40 degrees Celsius.
Which panelboards accept the ED43M050 circuit breaker?
This ED frame breaker is compatible with Siemens P1, P2, P3, P4, and P5 panelboards and switchboards. Note that installing this bolt-on breaker into these panels requires the appropriate bus connection hardware or mounting strap kit specific to your panelboard type.
Can the ED43M050 be reverse fed?
Yes. Siemens thermal magnetic ED frame circuit breakers with non-interchangeable trip units, such as the ED43M050, are suitable for reverse feed applications per UL 489 guidelines.
Can the Siemens ED43M050 replace older I-T-E circuit breakers?
Yes. Siemens acquired I-T-E and retained the same physical footprint for the ED frame. The ED43M050 can directly replace legacy I-T-E ED4 frame breakers with matching electrical specifications.
What wire sizes do the standard lugs on the ED43M050 accept?
The factory-installed lugs accept 10 AWG to 1/0 AWG copper or aluminum conductors. Always verify the required torque values printed directly on the breaker nameplate prior to terminating the wires.
How is the ED43M050 applied in DC circuits?
This breaker is rated for 250VDC with a 30kA interrupting capacity. When applying thermal magnetic molded case circuit breakers in DC systems, specific pole wiring configurations are required. Consult Siemens documentation for the correct series connection across the poles for 250VDC applications.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 20 reviews.
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Rating
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.