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Siemens ED42B050L Molded Case Circuit Breaker
- 50A
- 2 Pole
- Unit Mount
Siemens
ED42B050L
Molded Case Circuit Breaker
Brand
Siemens
SKU
ED42B050L
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Siemens ED42B050L - 50A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial applications, the Siemens ED42B050L is a 2-pole, 50A molded case circuit breaker from the Sentron ED frame family. It delivers robust thermal-magnetic protection with fixed long-time and instantaneous trip functions. Designed for unit mounting in individual enclosures and switchboards, this breaker includes both line and load lugs for immediate installation. It features an 18kAIC rating at 480VAC. Note: Replaced by the 3VA5150-4ED26-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | ED42B050L |
| Series | ED4 |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 65kA @ 240VAC, 18kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | ED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Enclosures, Individual Mounting, 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, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included (LN1E100) |
| 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
8 answersWhat does the L suffix indicate in the ED42B050L catalog number?
The L suffix designates that the circuit breaker is supplied from the factory with both line and load side lugs installed, ready for wire termination.
Is there a newer replacement series for the ED42B050L?
Yes, Siemens is transitioning the legacy Sentron ED frame to the modern 3VA series. The direct cross-reference for this 50A breaker is catalog number 3VA5150-4ED26-0AA0.
Can the ED42B050L be reverse fed?
Yes, this thermal-magnetic breaker is rated for reverse feed applications. Power can be supplied to either the top or bottom terminals without affecting the performance of the trip unit.
What type of enclosures are compatible with this unit mount breaker?
As a unit mount, feed-thru breaker, it is designed for individual enclosures like the Siemens W53045, as well as compatible Sentron switchboards and control panels that do not require bolt-on panelboard connections.
Is this 50A breaker suitable for HVAC equipment?
Yes, the ED42B050L is HACR rated, meaning it is safety certified to provide overcurrent protection for heating, air conditioning, and refrigeration motor loads.
Does the ED42B050L support internal accessories?
Yes, ED-frame breakers can accommodate field-installable internal accessories such as shunt trips, auxiliary switches, and undervoltage releases (like the U02ED60) for advanced control and monitoring.
Can this breaker be used in DC distribution systems?
Yes, the thermal-magnetic trip unit is rated for direct current applications up to 250VDC. This allows the breaker to be utilized in industrial DC control panels, battery systems, and transit applications requiring a 30kAIC rating.
Can the trip settings on the ED42B050L be adjusted?
No, this breaker features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip functions are factory calibrated and cannot be modified 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.