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Siemens ED43M020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Siemens
ED43M020
Molded Case Circuit Breaker
Brand
Siemens
SKU
ED43M020
Quantity
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Siemens ED43M020 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Calibrated for 50°C ambient environments, the Siemens ED43M020 is a 3-pole, 20A MCCB built for demanding industrial conditions. It features thermal-magnetic technology for fixed LI protection. This bolt-on breaker mounts into Siemens Sentron panelboards, switchboards, and motor control centers. It serves as a high-temperature alternative to the standard 40°C ED43B020. Rated 18 kAIC at 480VAC, it provides reliable short-circuit mitigation. The unit is HACR rated and reverse feed capable.Specifications
| Brand | Siemens |
|---|---|
| Series | ED4 |
| Amperage | 20A |
| 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 Sentron Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG (Cu), 12 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 50C |
| Construction Features | 50C Ambient Calibration, HACR Rated, Reverse Feed |
Product FAQs
6 answersWhat equipment is the Siemens ED43M020 designed to be installed in?
This ED frame breaker is engineered for bolt-on installation in Siemens Sentron panelboards, switchboards, and motor control centers. It is not compatible with standard plug-on residential load centers.
What does the M in the ED43M020 catalog number indicate?
The M designates that this breaker is calibrated for 50 degrees Celsius ambient environments, making it ideal for high-temperature industrial or marine applications. The standard commercial version, the ED43B020, is calibrated for 40 degrees Celsius.
How are the line and load connections configured on this breaker?
As a bolt-on breaker, the line side bolts directly to the busbar in compatible Siemens distribution equipment. The load side features mechanical lugs that accept 14 to 10 AWG copper or 12 to 10 AWG aluminum wire.
Is the ED43M020 suitable for heating and air conditioning equipment?
Yes, this breaker is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment. It is also reverse feed capable for flexible installation.
Can the ED43M020 replace older ITE or Gould circuit breakers?
Yes, because Siemens maintained the Sentron ED frame design after acquiring ITE, the ED43M020 can directly replace legacy ITE or Gould ED4 frame breakers with matching specifications in existing distribution equipment.
How does the thermal magnetic trip mechanism in the ED43M020 protect electrical circuits?
The fixed thermal element provides a time-delayed response to safely clear sustained overloads, while the instantaneous magnetic element immediately trips the breaker during severe short circuits to prevent equipment damage and electrical hazards.
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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.