The Square D QO120 is a standard miniature circuit breaker designed for reliable electrical protection. It is a 1-pole, 20-amp plug-in breaker that operates at 120/240 V AC (or 120 V AC) and 48 V DC. The breaker features an interrupt rating of 10 kA at 120/240 V AC and 5 kA at 48 V DC. It includes a Visi-Trip indicator that provides a clear visual signal when the breaker has tripped. The QO120 is HACR and Switching Duty rated and accepts AWG 14 to AWG 8 copper or aluminum wire via a pressure plate connection. It is UL listed and CSA certified, with an ambient operating temperature rating of 104 °F (40 °C). It requires one panel space. Please confirm panel compatibility, condition, source, availability, and lead time in the written quote before proceeding with installation or purchase.
Application context: The QO120 is designed for use in QO load centers and provides reliable protection for electrical systems. It is commonly used in residential and commercial applications requiring a 20A single-pole standard breaker.
Primary technical source for QO120 | Supporting documentation
The Square D QO120 is a standard miniature circuit breaker designed for reliable electrical protection. It is a 1-pole, 20-amp plug-in breaker that operates at 120/240 V AC (or 120 V AC) and 48 V DC. The breaker features an interrupt rating of 10 kA at 120/240 V AC and 5 kA at 48 V DC. It includes a Visi-Trip indicator that provides a clear visual signal when the breaker has tripped. The QO120 is HACR and Switching Duty rated and accepts AWG 14 to AWG 8 copper or aluminum wire via a pressure plate connection. It is UL listed and CSA certified, with an ambient operating temperature rating of 104 °F (40 °C). It requires one panel space. Please confirm panel compatibility, condition, source, availability, and lead time in the written quote before proceeding with installation or purchase.
| Specification | Value |
|---|---|
| Amperage | 20 A |
| Poles | 1 |
| Voltage | 120/240 V AC, 120 V AC, 48 V DC |
| Interrupt Rating | 10 kA at 120/240 V AC, 5 kA at 48 V DC |
| Mounting | Plug-in |
| Wire Size | AWG 14 to AWG 8 (Cu/Al) |
| Certifications | UL listed, CSA |
The QO120 is designed for use in QO load centers and provides reliable protection for electrical systems. It is commonly used in residential and commercial applications requiring a 20A single-pole standard breaker. Match the physical nameplate, panel label, mounting method, electrical ratings, and manufacturer instructions before purchase or installation.
Square D QO120 catalog record. Call (951) 903-9804 to request a written quote confirming the nameplate, ratings, mounting, condition, source, availability, lead time, shipping method, warranty, and compatibility requirements.
Brand: Square D | Catalog Number: QO120 | Series: QO Plug-In