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Siemens ED43B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Siemens
ED43B125
Molded Case Circuit Breaker
Brand
Siemens
SKU
ED43B125
Quantity
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Siemens ED43B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens ED43B125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | ED43B125 |
| Series | ED4 |
| Amperage | 125A |
| 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, SB 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, 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, Non-Interchangeable Trip, Reverse Feed |
Quantity
Siemens ED43B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | ED43B125-R |
| Series | ED4 |
| Amperage | 125A |
| 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, SB 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, 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, Non-Interchangeable Trip, Reverse Feed |
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Description
Delivering 125A of continuous current capacity, the ED43B125 is a rugged thermal-magnetic MCCB from the Siemens Sentron series. This three-pole, bolt-on breaker is rated for 18 kAIC at 480VAC and features fixed long-time and instantaneous trip functions. It is engineered for broad compatibility, mounting into Siemens P1 through P5 panelboards, SB switchboards, and motor control centers.Specifications
| Brand | Siemens |
|---|---|
| Part Number | ED43B125 |
| Series | ED4 |
| Amperage | 125A |
| 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, SB 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included, 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, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
7 answersWhich panelboards are compatible with the ED43B125 circuit breaker?
This bolt-on breaker is designed for Siemens P1, P2, P3, P4, and P5 panelboards, as well as SB switchboards and motor control centers. Installation requires the appropriate ED frame mounting strap kit for your specific enclosure.
What is the difference between the Siemens ED43B125 and the ED63B125?
Both models share the exact same physical SENTRON ED frame footprint and accessory compatibility. The difference lies in the interrupting capacity. The ED43B125 offers 18kAIC at 480VAC, whereas the ED63B125 provides a higher rating of 25kAIC at 480VAC.
Are internal accessories field-installable on this ED frame breaker?
Yes. Siemens ED frame circuit breakers feature internal accessory pockets that allow licensed electricians to field-install components like shunt trips, auxiliary switches, and bell alarms.
Does this breaker come equipped with terminal lugs?
Yes, it includes factory-installed load lugs, typically part number TA1E6125. Because it is a bolt-on branch breaker designed for panelboards, the line side bolts directly to the panel bus assembly using a separately sourced mounting kit.
Is the trip unit on the ED43B125 interchangeable?
No. The thermal-magnetic trip unit in Siemens ED frame breakers is fixed and factory-sealed. It cannot be removed or swapped for a different amperage rating in the field.
Can this Siemens breaker be installed in legacy I-T-E enclosures?
Yes. Siemens acquired I-T-E, and current SENTRON ED frame breakers serve as direct replacements for legacy I-T-E E4 and ED4 frame breakers, provided you have the correct bolt-on mounting hardware for the panel.
Does this circuit breaker support direct current (DC) systems?
Yes. In addition to alternating current applications, the ED43B125 is rated for up to 30kAIC at 250VDC, making it suitable for DC power distribution networks.
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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.