The Square D QO3100 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 100 Amps and a voltage rating of 120/240VAC, 48VDC. It has an interrupting rating of 10kAIC at 120/240VAC. The QO3100 has a plug-in connection type and includes long time and instantaneous trip functions.
Specifications
Brand
Square D
Series
QO
Amperage
100
Voltage
120/240VAC, 48VDC
Poles
3
Phase
3
Mounting Type
Plug-In
Approval
UL, CSA
Interrupting Rating
10kAIC at 120/240VAC
Frame Type
QO
Connection Type
Plug-In
Protection
Thermal Magnetic
Functions
Long Time and Instantaneous Trip
Terminal Connection
Box Lugs
Length (in)
2.9
Width (in)
2.2
Height (in)
3.5
Wire Gauge
AWG 4 to AWG 2/0, Copper or Aluminum
For Use With
QO Load Centers and NQ Panelboards
Standards
RoHS, REACh, HACR
Temperature Rating
40 °C
Circuit Breaker Type
Standard
Breaker Feature
Mercury Free
Actuator Type
Paddle
Max Wire Size
AWG 2
Min Wire Size
AWG 4
Mpn
QO3100
Upc
785901004417
Gtin
785901004417
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5.0
Rated 5.0 out of 5 stars
Based on 240 reviews
5
Rated out of 5 stars
231
Total 5 star reviews: 231
4
Rated out of 5 stars
9
Total 4 star reviews: 9
3
Rated out of 5 stars
0
Total 3 star reviews: 0
2
Rated out of 5 stars
0
Total 2 star reviews: 0
1
Rated out of 5 stars
0
Total 1 star reviews: 0
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 8/2/25
Customers say this electrical supply company delivers products quickly and reliably. Many reviews mention the availability of hard-to-find breakers and components. The ordering process is straightforward, and items arrive well-packaged. Reviews frequently note competitive pricing and consistent product availability. Most users report their items fit and function as expected.
W use a lot of these breakers and they seem to work great for us.
SR
Steve R.
Verified Buyer
Reviewing
Square D QO2100 2 Pole Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/15/25
Fast Response
Just tried this company out and was very pleased at how fast their order to delivery was. IMy order arrived in perfect condition 2 days later. Exactly what I ordered. I definitely recommend them. Their pricing is reasonable also. No complaints.
PP
Parts P.
Verified Buyer
Reviewing
Square D QO320 3 Pole Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
8/13/25
Square D QO320 3 Pole Circuit Breaker
We used these breakers a lot and have good success with these breakers.