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Siemens HED42B050L Molded Case Circuit Breaker
- 50A
- 2 Pole
- Unit Mount
Siemens
HED42B050L
Molded Case Circuit Breaker
Brand
Siemens
SKU
HED42B050L
Quantity
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Siemens HED42B050L - 50A 2 Pole Molded Case Circuit Breaker
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Description
Belonging to the Sentron ED-frame family, this 50-amp, two-pole molded case circuit breaker provides reliable thermal-magnetic protection for commercial facilities. It features a fixed LI trip function to handle demanding loads. The unit-mount configuration allows installation into standalone enclosures and switchboards. It includes LN1E100 line and load lugs for 10-1/0 AWG wire. With a 42kAIC rating at 480VAC, it ensures robust fault clearing. Replaced by the 3VA5150-6EC26-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HED42B050L |
| Series | HED4 |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 42kA @ 480VAC, 30kA @ 250VDC |
| Frame Type | HED |
|---|---|
| Terminal Type | Lugs |
| For Use With | Enclosures, Switchboards |
| Wire Gauge | 10 AWG - 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 |
|---|---|
| Accessories | Line and Load Lugs (LN1E100) |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
8 answersWhat does the "L" suffix in the HED42B050L part number indicate?
The "L" suffix means the circuit breaker is factory-supplied with both line and load lugs installed. Standard Siemens ED-frame breakers without this suffix typically only include load-side lugs.
Can the Siemens HED42B050L be reverse fed?
Yes. Siemens ED-frame circuit breakers can be reverse connected. They do not have restrictive line and load directional markings.
What equipment is compatible with the HED42B050L breaker?
This unit-mount ED-frame breaker is designed for installation in Siemens Sentron panelboards, switchboards, and standalone enclosures configured for ED-frame molded case circuit breakers.
What does the "H" in the HED4 frame designation mean?
The "H" indicates that this is a high-interrupting capacity version of the ED frame, providing a 42kA fault current rating at 480V AC compared to standard-tier ED frames.
What wire sizes are compatible with the lugs on this breaker?
The factory-installed lugs accept 10 AWG through 1/0 AWG copper or aluminum conductors. Always verify specific torque requirements printed on the breaker label before terminating.
Can the HED42B050L be used in DC applications?
Yes, this thermal-magnetic breaker is rated for use on direct current systems up to 250V DC, where it provides a 30kA interrupting rating.
Can I swap the trip unit on the HED42B050L to change the amperage?
No. Siemens ED-frame breakers feature a fixed, non-interchangeable thermal-magnetic trip unit. The entire breaker must be replaced to change the amperage rating.
What does the LI trip function on the HED42B050L provide?
The LI designation indicates a thermal-magnetic trip unit that provides Long-Time protection for standard overloads and Instantaneous protection for short circuits.
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