Zinsco / Sylvania SEH3C050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
Zinsco / Sylvania SEH3C050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for discontinued systems, the SEH3C050 restores functionality to commercial facilities. This 50-amp, three-pole MCCB utilizes thermal-magnetic trip technology to protect circuits against overloads. It mounts into legacy Sylvania, Challenger, and Westinghouse panelboards without aftermarket adapters. For modern upgrades, this unit is replaced by the Eaton EHD3050. Rated 14kAIC at 480VAC, it features fixed trip settings, load-side lugs, and is HACR rated.Specifications
| Brand | Zinsco / Sylvania |
|---|---|
| Series | SEH |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC |
| Frame Type | SEH |
|---|---|
| Terminal Type | Lugs |
| For Use With | Eaton F-Frame Panelboards, Sylvania Panelboards, Challenger Panelboards, Westinghouse Panelboards |
| Wire Gauge | 14 AWG - 1/0 AWG (Al/Cu) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB 1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
6 answersWhich panelboards accept the SEH3C050 circuit breaker?
The SEH3C050 is a direct fit for legacy Sylvania, Challenger, and Westinghouse panelboards. It is also fully compatible with modern Eaton F-Frame enclosures.
Is the Sylvania SEH3C050 interchangeable with Challenger or Westinghouse versions?
Yes. Due to historical acquisitions by Eaton, the Sylvania SEH3C050 serves as a direct replacement for Challenger SEH3C050 and Westinghouse SEH3C050 molded case circuit breakers.
What wire sizes and materials are supported by the SEH3C050 lugs?
The included lugs accommodate both aluminum and copper conductors, accepting wire sizes from 14 AWG up to 1/0 AWG.
What are the short-circuit interrupting ratings for the SEH3C050?
The breaker provides an interrupting capacity of 18kA when used on 240VAC systems, and 14kA on 480VAC systems.
Does the SEH3C050 snap into the panel or bolt on?
This is a bolt-on circuit breaker. It must be mechanically fastened to the panelboard busbar using bolts, which provides a secure and reliable connection for industrial and commercial applications.
How does the trip unit operate on the SEH3C050?
It utilizes a fixed thermal-magnetic trip unit. The thermal component provides long-time delay protection against sustained overloads, while the magnetic component provides instantaneous protection against short circuits.
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