Eaton / Westinghouse QNP3020 Miniature Circuit Breaker
- 20A
- 3 Pole
- Plug-On
Quantity
Eaton / Westinghouse QNP3020 - 20A 3 Pole Miniature Circuit Breaker
Re-Certified
Quantity
Description
Engineered for legacy commercial applications, the Eaton QNP3020 is a 20-amp, three-pole miniature circuit breaker. It delivers dependable 240VAC power management for older facilities. This plug-on breaker mounts seamlessly into vintage Eaton Pow-R-Line, Westinghouse, and Quicklag panelboards. Replacing the QP3020, it ensures a precise fit without the need for aftermarket adapters. Rated at 10kAIC, the unit provides standard LI protection through robust thermal-magnetic trip mechanisms.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | QNP3020-R |
| Series | QNP |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line Panelboards, Westinghouse Panelboards, Quicklag Panelboards |
| Wire Gauge | 14-10 AWG (Cu/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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Visual Trip Indicator |
Product FAQs
8 answersWhich panelboards accept the QNP3020 circuit breaker?
This plug-on breaker is engineered for legacy commercial applications and fits directly into vintage Eaton Pow-R-Line, Westinghouse, and Quicklag panelboards.
Is the QNP3020 a suitable replacement for older QP series breakers?
Yes, the QNP3020 serves as a direct replacement for the legacy QP3020 circuit breaker. It provides a precise fit in existing panels without the need for aftermarket adapters.
What are the wiring requirements for the QNP3020 terminals?
The box lugs are rated for both copper and aluminum conductors. They accept wire gauges ranging from 14 AWG to 10 AWG. Ensure proper torque specifications are followed during installation.
How does the thermal-magnetic trip unit operate on this breaker?
The fixed thermal-magnetic mechanism provides standard LI protection. The thermal component responds to long-time overloads, while the magnetic component trips instantaneously during short-circuit events.
What must be verified regarding the interrupting rating before installing this breaker?
The QNP3020 has a maximum interrupting rating of 10kA at 240VAC. Electricians must confirm that the available fault current at the panelboard does not exceed 10,000 amps to ensure safe operation.
Does the QNP3020 bolt onto the panel bus?
No, despite some legacy documentation referring to bolt-on Quicklag breakers, the QNP series features a plug-on mounting style. It snaps directly onto the bus bars of compatible panels.
Can this 3-pole breaker be installed in a standard single-phase load center?
No, the QNP3020 is a 3-phase, 3-pole breaker designed for commercial panelboards. It will not fit or operate correctly in a standard single-phase residential load center.
Why is this breaker listed under both Eaton and Westinghouse brands?
Eaton acquired the Westinghouse electrical distribution business. The QNP3020 is manufactured by Eaton but remains fully backward compatible with legacy Westinghouse Quicklag panelboards.
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