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Siemens ED42B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens
ED42B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
ED42B125
Quantity
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Siemens ED42B125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens ED42B125 - 125A 2 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | ED42B125 |
| Series | ED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | ED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (TA1E6125) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens ED42B125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | ED42B125 |
| Series | ED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | ED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (TA1E6125) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Engineered for demanding applications, the Siemens ED42B125 is a 2-pole, 125A molded case circuit breaker providing dependable long-time and instantaneous (LI) thermal magnetic protection. This bolt-on MCCB fits Siemens Sentron P1, P2, and P3 panelboards, switchboards, and motor control centers. It features factory-installed load side lugs and is superseded by the 3VA5112-4ED21-0AA0. Featuring an 18 kAIC rating at 480VAC, this ED4 frame breaker is HACR rated and reverse feed capable.Specifications
| Brand | Siemens |
|---|---|
| Part Number | ED42B125 |
| Series | ED4 |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | ED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3-3/0 AWG (Cu), 1-2/0 AWG (Al) |
| Max Wire | 3/0 AWG (Cu), 2/0 AWG (Al) |
| Min Wire | 3 AWG (Cu), 1 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs (TA1E6125) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
9 answersWhat types of panels are compatible with the Siemens ED42B125?
This bolt-on circuit breaker is designed for use in Siemens Sentron P1, P2, and P3 panelboards, as well as compatible Siemens switchboards and motor control centers.
Can I use this breaker to replace older ITE or Gould models?
Yes. Siemens acquired ITE and Gould, and this ED4 frame breaker serves as a direct replacement for legacy ITE and Gould ED4 frame circuit breakers with matching specifications.
Is the ED42B125 suitable for reverse feeding?
Yes, this ED frame molded case circuit breaker is reverse feed capable, allowing it to be wired for back-feeding applications where permitted by local electrical codes.
Does this circuit breaker carry an HACR rating?
Yes, the ED42B125 is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment group motor installations.
How does this breaker mount into the panel?
This is a bolt-on circuit breaker. The line side bolts directly to the panelboard bus bars, while the load side uses standard mechanical lugs for wire connections.
Are load side lugs included with this breaker?
Yes, factory-installed load side lugs are standard on this model. They accept 3 to 3/0 AWG copper or 1 to 2/0 AWG aluminum wire.
Does this breaker provide GFCI or AFCI protection?
No, this is a standard thermal-magnetic circuit breaker. It provides long-time and instantaneous trip functions for overload and short-circuit protection, but does not include ground fault or arc fault circuitry.
Can this breaker be mounted on a standard DIN rail?
No, the ED42B125 is a panel-mount, bolt-on circuit breaker. It is not designed for DIN rail installation.
Are the trip settings on the ED42B125 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time overload and instantaneous short-circuit trip thresholds are factory set 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 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.