Square D Q1B350 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
Square D Q1B350 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial power distribution, this 50A molded case circuit breaker delivers dependable thermal-magnetic trip functions. It handles standard overloads in 240VAC systems. Designed for bolt-on installation, this breaker fits into Square D NQOB panelboards. For upgrades, it is replaced by the QOB350 when utilizing the SK5668 mounting assembly. Rated for 10kAIC, the unit features a Visi-Trip indicator to easily spot tripped circuits. It accommodates #8-2 AWG wiring.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1B350-R |
| Series | Q1B |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Box Lugs |
|---|---|
| For Use With | Square D NQOB Panelboards |
| Wire Gauge | #8-2 AWG |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Common Trip, Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards are compatible with the Q1B350 circuit breaker?
This legacy bolt-on breaker is designed specifically for use in Square D NQOB commercial panelboards.
What is the modern replacement for a Q1B350 breaker?
To replace a Q1B350 in an NQOB panel, use the modern equivalent QOB350 circuit breaker along with an SK5668 mounting assembly kit, which includes the necessary phase connectors for a 3 pole breaker.
Is the Q1B350 suitable for HVAC applications?
Yes, this breaker is HACR rated, making it approved for use with heating, air conditioning, and refrigeration equipment.
How can I tell if the Q1B350 has tripped?
This breaker features a Visi-Trip visual indicator. When the breaker trips, a highly visible red indicator appears, allowing you to quickly spot the faulted circuit in the panel.
What are the safety certifications for the Q1B350?
It is a UL 489 listed and CSA certified molded case circuit breaker, calibrated for a standard ambient operating temperature of 40 degrees Celsius.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- MCMichael C.ReviewingSquare D Q1B3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/11/22Fast Service.
Fast Service.