Square D Q1370-1021 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Plug-On
Quantity
Square D Q1370-1021 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial applications, the Square D Q1370-1021 is a 70A, three-pole molded case circuit breaker. It features a factory-installed 120/240VAC shunt trip, allowing for remote tripping capabilities in safety-critical environments. This plug-on MCCB is specifically designed to fit into Square D Q1 panelboards. For modern upgrades, this unit is superseded by the QO3701021. Operating at 240VAC with a 10kAIC rating, it utilizes thermal-magnetic trip technology.Specifications
| Brand | Square D |
|---|---|
| Part Number | Q1370-1021-R |
| Series | Q1 |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Plug-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Q1 Panelboards |
| Wire Gauge | 8 AWG - 2 AWG (Al/Cu) |
| Max Wire | 2 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (120/240VAC) |
| Standards | CSA C22.2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Visual Trip Indicator |
Product FAQs
6 answersWhich panelboards accept the Q1370-1021 circuit breaker?
This breaker is designed exclusively for legacy Square D Q1 panelboards. The original Q1 frame has a wider footprint than modern QO breakers, making this specific form factor necessary for a proper physical fit in older enclosures.
What does the -1021 suffix indicate on this Square D catalog number?
The -1021 suffix denotes a factory-installed 120/240VAC shunt trip. This internal accessory allows the breaker to be tripped remotely via an external voltage signal.
Is the Square D Q1 breaker series still manufactured?
No, the Q1 series is an obsolete legacy frame no longer produced by Schneider Electric. Sourcing this specific frame allows you to service existing Q1 panelboards without the expense of a complete panel retrofit.
What protection is provided by the LI trip function?
The LI designation means the thermal-magnetic trip unit delivers Long-Time (L) protection for overloads and Instantaneous (I) protection for short circuits. Both trip thresholds are fixed on this specific model.
How is the integrated shunt trip typically utilized for safety?
The 120/240VAC shunt trip is commonly wired to emergency stop buttons, fire suppression systems, or safety interlocks. When the external circuit applies voltage to the shunt trip coil, it mechanically opens the breaker contacts to immediately de-energize the load.
Can the Q1370-1021 be installed in place of a standard Q1370?
Yes. While it includes a shunt trip for remote operation, the breaker will function normally as a standard thermal-magnetic breaker if the shunt trip control wires are left disconnected and properly capped.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- JTJeff T.ReviewingSquare D Q12100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/23/18Refurbished breaker
Found the correct breaker, it was very easy to find. Great price and shipped out on time. Definitely recommend this company.