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Square D LHL3640030DC1625 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Square D
LHL3640030DC1625
Molded Case Circuit Breaker
Brand
Square D
SKU
LHL3640030DC1625
Quantity
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Square D LHL3640030DC1625 - 400A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding commercial applications, this 400-amp molded case circuit breaker offers robust LI protection. The device is uniquely rated for 500VDC operations. This unit-mount component fits securely into Square D panelboards and industrial switchboards. Line and load lugs are included, accommodating up to 600 kcmil conductors. Advanced control capabilities are provided by a factory-installed 2A/2B auxiliary switch and a 24VDC undervoltage release. It achieves a 65kA rating at 240VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | LHL3640030DC1625-R |
| Series | LHL |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 20kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D L-Frame Enclosures, Switchboards, Panelboards |
| Wire Gauge | (1) 1 AWG - 600 kcmil (Al/Cu) or (2) 1 AWG - 250 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 1 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Handle Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included, Undervoltage Release (Factory Installed), Auxiliary Switch (Factory Installed) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity, 500VDC Rated |
Product FAQs
6 answersWhat equipment is the LHL3640030DC1625 circuit breaker designed to fit?
This unit-mount L-Frame breaker is compatible with Square D L-Frame enclosures, switchboards, and panelboards. It is designed for hardwired unit-mount installations rather than plug-on load centers.
What wire sizes are supported by the lugs on this 400A breaker?
The terminal lugs accept either a single 1 AWG to 600 kcmil wire or dual 1 AWG to 250 kcmil wires per phase. Both aluminum and copper conductors are supported.
What are the contact ratings for the included LA11352 auxiliary switch?
The factory-installed LA11352 auxiliary switch provides a 2NO-2NC contact configuration rated for 10A at 125 to 250 VAC, and 5A at 30 VDC. It is used for remote status signaling and control circuit integration.
How does the 24V undervoltage release function on this breaker?
The factory-installed undervoltage release trips the breaker automatically if the 24V control voltage drops below a specific threshold. This safety feature prevents connected machinery from restarting unexpectedly when power is restored.
How is the trip unit configured on this L-Frame breaker?
It utilizes a thermal magnetic trip system with Long-Time and Instantaneous (LI) functions. The thermal overload protection is fixed, while the magnetic short-circuit pickup is adjustable to coordinate with other protective devices in your system.
Can this Square D breaker be used in DC power systems?
Yes, it is rated for use in DC applications up to 500VDC with a 20kA interrupting capacity. This makes it suitable for ungrounded DC configurations and industrial DC power distribution.
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