Overview
The Square D QOU260 is a 60-amp, 2-pole standard miniature circuit breaker in the QOU series. Rated for HACR (Heating, Air Conditioning, and Refrigeration) applications, this thermal-magnetic breaker provides reliable overcurrent and short-circuit protection at 120/240VAC with a 10 kA interrupt rating. The unit-mount construction integrates seamlessly into DIN rail systems, control panels, and OEM enclosures.
Key Features
- HACR Rated: Specifically designed for HVAC/R applications and general industrial use
- Thermal-Magnetic Trip: Long-time and instantaneous protection against overloads and short circuits
- Visi-Trip Indicator: Visual confirmation when breaker trips, reducing troubleshooting time
- Slotted Box Lugs: Accepts copper or aluminum wire (14–2 AWG) with 5.08 N·m tightening torque
- Multiple Mounting Modes: Compatible with unit mount, DIN rail, surface, and flush-mount installations
- Compact Design: 0.75 in. wide per pole; fits standard industrial enclosures
- High Humidity/Salt Resistance: Internal components resist corrosion; passes 500-hour salt spray test
Technical Specifications
- Current Rating: 60 A
- Poles: 2 Pole
- Voltage Rating: 120/240VAC (also rated 48 VDC)
- Interrupt Capacity: 10 kA @ 120/240VAC; 10 kA @ 120VAC; 5 kA @ 48VDC
- Trip Type: Thermal Magnetic (Standard)
- Connection Type: Slotted box lugs (line and load)
- Wire Gauge: 14–2 AWG (copper or aluminum)
- Mounting: Unit mount (DIN rail, surface, flush-mount compatible)
- Frequency: 50/60 Hz
- Operating Temperature: 40°C to 104°F (limited by case)
- Dimensions: 2.95 in. L × 1.5 in. W × 4.05 in. H
- Actuator: Toggle
- Certifications: UL 489 (File No. E84967), CSA C22.2 No. 5, NEMA AB1, Federal Spec W-C-375B/GEN, HACR rated
- Warranty: 18 months
Typical Applications
- HVAC/Refrigeration systems and compressor protection
- Commercial and industrial control panels
- OEM equipment and machinery enclosures
- Motor and equipment branch-circuit protection
- Wastewater treatment and food processing facilities
- Material handling and specialty machinery circuits
- Both AC and DC electrical system protection (120/240VAC or 48VDC)
Compatibility & Replacements
Compatible With
- DIN rail assemblies (standard European and industrial profiles)
- Square D QO-series enclosures and load centers
- Control panels built to UL 489 MCB standards
- Thermal-magnetic breaker slots in industrial electrical cabinets
- OEM equipment requiring 120/240VAC or 48VDC circuit protection
Replaces / Drop-In Replacement For
- Older Square D QO260 (if sourced from same era and enclosure type)
- Square D QOU-series 60A 2-pole units with identical mounting footprint
- Generic 60A thermal-magnetic 2-pole MCBs with compatible DIN/unit-mount geometry
Works With
- UL 489-compliant miniature circuit breaker ecosystems
- Industrial control system architectures (HVAC controls, compressor relays, motor starters)
- Thermal overload relays and auxiliary trip devices (when properly coordinated)
- Legacy and modern industrial electrical systems (120/240VAC or 48VDC supply)
- Surge protective devices and transient voltage suppression (when coordinated)
