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Square D A1B3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
A1B3100
Molded Case Circuit Breaker
Brand
Square D
SKU
A1B3100
Quantity
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Square D A1B3100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Built for commercial and industrial applications, the Square D A1B3100 is a 3-pole, 100A molded case circuit breaker. It delivers reliable thermal-magnetic protection for older electrical distribution systems. This bolt-on unit is specifically designed to install into legacy Square D NA1B panelboards. While the original A1B series is discontinued, it can be replaced by the modern QOB3100 when used with the appropriate retrofit kit.Specifications
| Brand | Square D |
|---|---|
| Part Number | A1B3100 |
| Series | A1B |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | A1B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D NA1B Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu/Al) |
| Max Wire | 1/0 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, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator, Long Body |
Product FAQs
6 answersWhich panelboards accept the Square D A1B3100 circuit breaker?
The A1B3100 is engineered specifically for installation in legacy Square D NA1B panelboards.
Is the A1B3100 circuit breaker still in production?
The original A1B series is obsolete. If a direct replacement is unavailable, a modern QOB3100 breaker can be used as a substitute when paired with the correct NA1B retrofit mounting kit.
What are the wiring requirements for the A1B3100 load lugs?
The terminal lugs accommodate either copper or aluminum conductors ranging from 4 AWG up to 1/0 AWG.
What type of protection does the A1B3100 trip unit provide?
It is equipped with a fixed thermal-magnetic trip unit, delivering both long-time thermal protection for overloads and instantaneous magnetic protection for short circuits.
How is the A1B3100 secured within the panelboard?
This breaker features a bolt-on mounting design, requiring it to be mechanically bolted directly to the panelboard busbars for a secure electrical connection.
Does the A1B3100 support direct current applications?
Yes, alongside its standard 240VAC rating, this breaker is also rated for use in 48VDC electrical systems.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- NLNoble L.ReviewingSquare D A1B115 - 15A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/19/21Great Service, On Time Delivery, Great Price
SuperBreakers is my a dependable source to meet my customer's requirements at a good value and with on time delivery. When you throw in great customer service, you can't beat that combination.
- CHCobe H.ReviewingSquare D A1B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/11/19Repeat customer
Although these breakers are refurbished they work great. It beats having to change the whole panel because of one breaker.