Square D Q2L2150H Molded Case Circuit Breaker
- 150A
- 2 Pole
- Unit Mount
Square D
Q2L2150H
Molded Case Circuit Breaker
Brand
Square D
SKU
Q2L2150H
Quantity
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Square D Q2L2150H - 150A 2 Pole Molded Case Circuit Breaker
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Description
Part of Square D's legacy Q-Frame series, the Q2L2150H is a 2-pole molded case circuit breaker built for commercial and industrial power distribution. It provides reliable thermal-magnetic protection with fixed long-time and instantaneous (LI) trip functions. This 150A unit mount breaker is designed for use in Square D individual enclosures, metering devices, and switchboards. Rated at 22kAIC at 240VAC, it features a Visi-Trip indicator and is HACR rated. It is replaced by the QDL22150.Specifications
| Brand | Square D |
|---|---|
| Series | Q2L |
| Amperage | 150A |
| Poles | 2 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC |
| Frame Type | Q2L |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Individual Enclosures, Metering Devices, Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| 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 | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip, High Interrupting Capacity |
Product FAQs
7 answersWhat panels and enclosures are compatible with the Square D Q2L2150H?
This legacy Q-Frame breaker is designed for unit mounting in Square D individual enclosures, metering devices, switchboards, and legacy NQOD panelboards.
How does the Q2L2150H mount into the electrical system?
The Q2L2150H is a unit-mount, feed-thru circuit breaker. It does not plug onto a busbar or bolt onto a panelboard bus. Instead, it secures via mounting hardware and features lug terminals on both the line and load sides for direct wire connections.
What wire sizes are accepted by the factory lugs on the Q2L2150H?
The line and load lugs accept aluminum or copper conductors ranging from 4 AWG up to 300 kcmil.
What does the H in the Q2L2150H catalog number signify?
The H indicates a high interrupting rating. This specific model provides a 22kAIC rating at 240VAC, which is significantly higher than the standard 10kAIC rating found on base Q2L2150 models.
What type of trip unit is equipped on the Q2L2150H?
It features a fixed thermal-magnetic trip unit providing Long-Time (L) and Instantaneous (I) overcurrent protection. Both the thermal and magnetic trip settings are non-interchangeable and factory-fixed.
Can I use a modern PowerPact Q-frame breaker to replace the Q2L2150H?
While modern PowerPact Q-frame breakers are the current manufacturer substitutes, installing the exact legacy Q2L2150H preserves the original UL listing of your existing NQOD panelboards and enclosures without requiring field modifications.
Why is it critical to match the 22kAIC rating when replacing an existing Q2L2150H?
The interrupting rating must meet or exceed the available fault current at the installation point. Downgrading to a standard 10kAIC breaker in a system designed for 22kAIC could result in catastrophic equipment failure during a severe short circuit.
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