Overview
The Square D QOU3201200 is a heavy-duty molded case circuit breaker designed for 3-phase power distribution and protection. This 20 amp, 3 pole, 240 volt circuit breaker from the QOU series features an auxiliary switch and is a thermal magnetic bolt-on molded case circuit breaker designed for 3-phase applications with a 10kA interrupt rating at 240 VAC. The unit provides reliable overcurrent protection with long time and instantaneous trip functions and uses slotted box lugs for line and load side connections.
Key Features
- 10kA interrupt rating at 240 VAC
- Long time and instantaneous trip functions
- Provides reliable protection with alarm switch capability
- Bolt-on mounting for standard enclosure integration
- Thermal magnetic trip mechanism for fast response to fault conditions
- Slotted box lugs for secure line and load connections
Technical Specifications
- Amperage: 20A
- Voltage Rating: 240V AC
- Poles: 3 Pole, 3 Phase
- Interrupting Rating (AIC): 10 kA at 240V AC
- Trip Unit: Thermal Magnetic
- Mounting Type: Bolt-On
- Series: QOU
- Auxiliary Switch: 1NO Contact, 120 VAC 5A
- Connection Type: Slotted Box Lugs (Line & Load)
- Operating Temp: 40°C ambient
- Certifications: UL 489, ANSI C37
Typical Applications
The QOU3201200 is suitable for:
- 3-phase motor circuits in industrial facilities
- Branch circuit protection in manufacturing environments
- Equipment control in commercial power distribution panels
- Retrofit installations in existing QOU series enclosures
- OEM integration where 20A 3-pole 240V protection is required
Compatibility & Replacements
Compatible With
- Square D QOU series enclosures and panels
- Standard 240V three-phase power systems
- Equipment and machinery with 20A thermal magnetic protection requirements
- Control systems requiring 120V AC alarm switch integration
Replaces / Drop-In Replacement For
The QOU3201200 is compatible with other QOU series molded case breakers in the same frame size and amperage. Verify compatibility with your system integrator before ordering, as replacement breakers must match the original unit’s trip characteristics and mounting configuration.
Works With
- QOU series auxiliary switch accessories
- Standard electrical enclosure bus systems
- Thermal magnetic control circuits
- Industrial alarm and monitoring systems (via auxiliary contact)
