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Square D Q1B3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
Q1B3100
Molded Case Circuit Breaker
Brand
Square D
SKU
Q1B3100
Quantity
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Square D Q1B3100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Delivering reliable thermal-magnetic protection, this 100A breaker provides 10kAIC of interrupting capacity. It features robust long-time and instantaneous trip functions for three-phase systems. The integrated Visi-Trip indicator allows personnel to quickly spot tripped circuits. The bolt-on design installs into legacy Square D NQO and NQOB load centers. Facilities can transition to the newer QOB3100 by installing an SK5668 horizontal bus bar kit. This 240VAC component is HACR rated.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1B3100-R |
| Series | Q1B |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q1B |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | Square D NQO, NQOB Panelboards |
| Wire Gauge | #4-2/0 AWG |
| Max Wire | 2/0 AWG |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| 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 |
Product FAQs
7 answersWhich panelboards are compatible with the Q1B3100?
This legacy breaker mounts exclusively in Square D NQO and NQOB series panelboards.
What is the recommended replacement for an obsolete Q1B3100?
To replace this unit with modern hardware, Schneider Electric recommends installing a QOB3100 branch breaker paired with an SK5668 mounting assembly kit to fit the existing NQOB panelboard.
Does installing the exact Q1B3100 require a retrofit adapter kit?
No. When using this exact Q1B frame replacement, it bolts directly into NQO and NQOB panelboards. Adapter kits like the SK5668 are only required when upgrading to the newer QOB frame.
What wire gauge range is supported by the Q1B3100 lugs?
The factory box lugs accept conductor sizes ranging from #4 AWG up to 2/0 AWG.
How is this breaker secured to the panelboard?
The Q1B3100 uses a bolt-on connection. It fastens directly to the busbar with screws, providing a secure, vibration-resistant installation typical of commercial distribution systems.
Can the trip curve on the Q1B3100 be field-adjusted?
No. It uses a thermal-magnetic trip unit with fixed long-time and instantaneous functions that cannot be altered after factory calibration.
Is the Q1B3100 rated for high available fault currents?
It features a standard interrupting capacity of 10kA at 240V AC. It must not be deployed in systems where the available short-circuit current exceeds 10,000 amps.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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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.