Description
The Square D QBA221504 is a molded case circuit breaker designed for 150 A, 240 VAC applications in single-phase electrical systems. This breaker uses an I-Line plug-in connection to provide secure, quick installation in compatible distribution equipment. Its thermal magnetic trip unit ensures consistent protection against overloads and short-circuit events.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Square D |
| Category |
Circuit Breakers |
| Part Number |
QBA221504 |
| Subcategory |
Molded Case Circuit Breakers |
| Series / Frame |
QBA / Q Frame |
| Amperage |
150 A |
| Voltage Rating |
240 VAC |
| Phase |
1 |
| Poles |
2 |
| Interrupt Rating |
10 kA @ 240 VAC |
| Trip Unit |
Thermal Magnetic (Long-Time, Instantaneous) |
| Connection Type |
I-Line Style Plug-In |
| Terminal Connection |
Load Side Lug |
| Actuator Type |
Control Lever |
| Mounting Type |
I-Line Plug-In |
| Temperature Rating |
–25°C to 70°C |
| Certifications |
UL Listed, CSA, NEMA, NOM, HACR |
| Country of Origin |
United States |
| Dimensions (H × W × D) |
6.47 × 4.44 × 3.09 in |
| Protection Type |
Overload and Short-Circuit |
| Weight |
2.14 lbs |
Information About QBA221504
The QBA221504 is part of the Square D QBA series, built for use in I-Line power distribution systems requiring reliable, high-capacity circuit protection. It incorporates a Q frame design, offering a compact footprint while supporting demanding residential, commercial, and light industrial applications. The breaker is compatible with single-phase systems and includes load-side lug terminals for straightforward wiring. Its LI (long-time and instantaneous) trip functions enable stable operation under varying electrical conditions.
Key Features:
- 150A Current Capacity: Supports high-demand branch and feeder circuits in commercial and industrial applications.
- 240 VAC Single-Phase Operation: Designed for standard low-voltage distribution systems.
- Thermal Magnetic Trip Unit: Provides overload and short-circuit protection through long-time and instantaneous trip functions.
- I-Line Plug-In Mounting: Enables fast, secure installation with Square D I-Line panelboards.
- 10 kA Interrupt Rating: Safely interrupts fault currents up to 10kA at 240 VAC.
- Q Frame Construction: Compact design suitable for tight equipment spacing and high-density installations.
- UL Listed Compliance: Meets recognized safety and performance standards for dependable field use.
- Wide Temperature Tolerance: Rated for operation between –25°C and 70°C for flexibility in varying environments.
The QBA221504 delivers the reliability and precision required for critical overcurrent protection in modern electrical distribution systems.
