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Siemens E42M020 ED42M020 - 20A 2 Pole Molded Case Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
Siemens
E42M020
ED42M020 - 20A 2 Pole Molded Case Circuit Breaker
Brand
Siemens
SKU
E42M020
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Siemens ED42M020 - 20A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial and marine applications, the Siemens E42M020 provides robust overcurrent protection. This 2-pole, 20-amp molded case circuit breaker utilizes a fixed thermal-magnetic trip unit to safeguard critical electrical infrastructure. The bolt-on design installs into Siemens Sentron panelboards and switchboards. It includes factory-installed load lugs and supports reverse feed configurations. Rated at 18 kAIC at 480VAC, this ED4 frame breaker features a 50°C ambient calibration.Specifications
| Brand | Siemens |
|---|---|
| Part Number | E42M020-R |
| Series | ED4 |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards, Switchboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 50C |
| Construction Features | 50C Ambient Calibration, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
7 answersWhat panelboards are compatible with the Siemens ED42M020?
This ED4-frame breaker is designed for installation in Siemens Sentron panelboards and switchboards. Always verify your specific panel's labeling to confirm acceptance of ED4 frame bolt-on breakers.
What wire sizes and materials are accepted by the lugs on the ED42M020?
The factory lugs accept 14 to 10 AWG copper (Cu) wire or 12 to 10 AWG aluminum (Al) wire. Ensure you torque the connections to the manufacturer's specifications during installation.
What does the LI trip function mean on this breaker?
LI stands for Long-Time and Instantaneous trip functions. The thermal-magnetic trip unit uses a bimetallic strip for Long-Time overload protection and an electromagnetic assembly for Instantaneous short-circuit protection.
Are the part numbers E42M020 and ED42M020 interchangeable?
Yes, E42M020 is a common shorthand for the full Siemens catalog number ED42M020. Both refer to the same 20-amp, 2-pole ED4-frame molded case circuit breaker.
Can I substitute a different brand of breaker for the Siemens ED42M020?
No. Mixing breaker brands can void the UL listing of your panelboard and create a fire hazard. You should only install Siemens ED-frame breakers in Siemens panels designed for them.
How is the ED42M020 secured inside the panelboard?
It is a bolt-on breaker, meaning it fastens directly to the panel's bus bars with screws or bolts. This provides a highly secure, vibration-resistant connection commonly required in commercial and industrial environments.
Can the ED42M020 be used in direct current (DC) systems?
Yes. While commonly used for 240V or 480V AC systems, this breaker is also rated for 250V DC applications, providing a 30kA interrupting capacity for industrial DC circuits.
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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.