Square D Q1L370 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Unit Mount
Square D
Q1L370
Molded Case Circuit Breaker
Brand
Square D
SKU
Q1L370
Quantity
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Square D Q1L370 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Built for commercial and industrial power distribution, the Square D Q1L370 is a 3-pole unit mount circuit breaker rated for 70 amps at 240VAC. It utilizes fixed thermal magnetic trip technology to deliver long-time and instantaneous (LI) protection. Equipped with factory-installed lugs and a Visi-Trip indicator, this 10kAIC breaker mounts into OEM panels and Q1L enclosures. When replacing aging infrastructure, note that this unit is cross-referenced with the newer QOU370.Specifications
| Brand | Square D |
|---|---|
| Series | Q1L |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | Q1L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Q1L Enclosures, OEM Panels |
| Wire Gauge | 8-2 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 Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Accessories | Lugs (Factory Installed) |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator |
Product FAQs
6 answersWhat enclosures are compatible with the Square D Q1L370?
This unit-mount circuit breaker is designed specifically for legacy Square D Q1L enclosures and compatible OEM panels.
What is the modern replacement for the legacy Q1L370 circuit breaker?
The Square D QOU370 serves as a functional substitute for the Q1L370. It provides the same 70-amp capacity and 10kAIC rating at 240VAC for facilities updating their infrastructure.
What wire gauge is supported by the lugs on the Q1L370?
The feed-thru lugs accept aluminum or copper wiring ranging from 8 AWG to 2 AWG.
How does the thermal-magnetic trip unit function on the Q1L370?
The breaker uses fixed thermal and magnetic elements to deliver long-time and instantaneous (LI) protection, safeguarding equipment against standard overloads and short circuits.
How is the Q1L370 mounted?
It features a standalone unit-mount form factor with feed-thru connections, allowing it to be secured directly to the panel or enclosure rather than plugging onto a busbar.
What frame family does the Q1L370 belong to?
It is part of the legacy Square D Q-Frame family of molded case circuit breakers.
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