---
product_id: 488330413
title: "WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip"
brand: "westinghouse"
price: "$55.28"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/488330413-westinghouseul-489-ac-miniature-circuit-breaker-20-amp-single-pole
store_origin: US
region: United States of America
---

# 20A Power 277V AC 10kA Protection WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip

**Brand:** westinghouse
**Price:** $55.28
**Availability:** ✅ In Stock

## Summary

> 🔌 Power Up Your Protection!

## Quick Answers

- **What is this?** WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip by westinghouse
- **How much does it cost?** $55.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/488330413-westinghouseul-489-ac-miniature-circuit-breaker-20-amp-single-pole)

## Best For

- westinghouse enthusiasts

## Why This Product

- Trusted westinghouse brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **⚡ Fast Response:** Current limiting design interrupts within the first half of the AC cycle.
- • **🔒 Safety First:** UL489 certified for ultimate peace of mind.
- • **⚙️ Easy Installation:** Snaps onto standard 35mm DIN rails effortlessly.
- • **🔧 Versatile Applications:** Ideal for HVAC, PLCs, and more—perfect for modern control systems.
- • **🌍 North American Approved:** Meets electrical code standards in the US and Canada.

## Overview

The Westinghouse UL 489 AC Miniature Circuit Breaker is a robust 20 Amp, single pole device designed for superior thermal overload and short circuit protection. With a 10kA short-circuit current rating and compatibility with 277V AC and 60V DC, this UL Listed breaker is perfect for a variety of applications, including HVAC systems and programmable logic controllers. Its current limiting feature ensures rapid interruption, enhancing safety and reliability in your electrical systems.

## Description

WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip

## Product Details

- **Brand:** Westinghouse
- **Current Rating:** 20 Amps
- **Circuit Breaker Type:** Standard
- **Mounting Type:** DIN Rail Mount
- **Number Of Poles:** 1

## Images

![WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip - Image 1](https://m.media-amazon.com/images/I/61Luy5kKD8L.jpg)
![WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip - Image 2](https://m.media-amazon.com/images/I/61rKRe7O5nL.jpg)
![WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip - Image 3](https://m.media-amazon.com/images/I/812jz02NJ4L.jpg)
![WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip - Image 4](https://m.media-amazon.com/images/I/71nN+uEtNqL.jpg)
![WestinghouseUL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip - Image 5](https://m.media-amazon.com/images/I/81+oIMiAgIL.jpg)

## Questions & Answers

**Q: Why does this circuit breaker have extensions on the side? Many others do not have this design.**
A: Westinghouse Miniature Circuit Breakers are certified UL-489 which means suitable for branch circuit protection. The extended barriers are necessary for UL-489 approval.  Other MCBs without the extended barriers are either NOT UL certified, or only UL approved as supplementary protectors meaning the MCB must be used with a fully rated breaker within the same panel.  Applying Westinghouse MCBs will assure that your installation is utilizing fully UL approved breakers.

## Frequently Bought Together

- Westinghouse UL 489 AC Miniature Circuit Breaker, 20 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip
- Westinghouse UL 489 AC Miniature Circuit Breaker, 15 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip
- Westinghouse UL 489 AC Miniature Circuit Breaker, 30 Amp, Single Pole, C Curve, 10kA, 277V AC, 60V DC, Non-Polarized, UL Listed, DIN Rail Breaker with Thermal Magnetic Trip

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-15*