Zinsco / Sylvania SEH3C020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Quantity
Zinsco / Sylvania SEH3C020 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in replacement for legacy Sylvania, Challenger, and Westinghouse systems, the SEH3C020 is a 20A, 3-pole molded case circuit breaker. It installs into older commercial and industrial panelboards to maintain existing infrastructure safely. This bolt-on unit features thermal-magnetic trip technology for reliable overload and short-circuit protection. Rated for 14kAIC at 480VAC, it is fully interchangeable with the modern Eaton EHD3020, offering a seamless fit for F-Frame enclosures.Specifications
| Brand | Zinsco / Sylvania |
|---|---|
| Part Number | SEH3C020-R |
| Series | SEH |
| Amperage | 20A |
| 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
5 answersWhich panelboards accept the SEH3C020 circuit breaker?
This breaker is designed to fit legacy Sylvania, Challenger, and Westinghouse panelboards. It is also compatible with Eaton F-Frame systems that accept SEH frame breakers.
Can the SEH3C020 replace Challenger or Westinghouse SEH breakers?
Yes. Sylvania, Challenger, and Westinghouse shared the SEH frame design. This 20A, 3-pole breaker serves as a direct drop-in replacement for the equivalent models across these legacy brands.
Are the trip settings on the SEH3C020 adjustable?
No. This thermal-magnetic breaker features fixed long-time and fixed instantaneous (LI) trip functions. The trip curve is factory-set and cannot be modified in the field.
Are the lugs on the SEH3C020 rated for aluminum wire?
Yes, the breaker features lugs that are dual-rated for both aluminum and copper conductors. They accept wire gauges ranging from 14 AWG to 1/0 AWG.
How is the SEH3C020 secured inside the panelboard?
It uses a bolt-on connection to attach directly to the panelboard bus. This provides a secure, vibration-resistant installation typical of commercial and industrial electrical systems.
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