Square D NENL34050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Unit Mount
Quantity
Square D NENL34050 - 50A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for robust power distribution, the Square D NENL34050 is a 3-pole, 50A molded case circuit breaker. It utilizes fixed thermal and magnetic trip units to deliver reliable LI protection. This unit mount device integrates into Square D enclosures, control panels, and QED switchboards. Facilities needing a modern substitute can use the HDL36050, which replaces this model. It provides an 18 kAIC interrupting rating at 480Y/277VAC and features standard lug terminals for 14-2 AWG wire.Specifications
| Brand | Square D |
|---|---|
| Part Number | NENL34050 |
| Series | NENL |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480Y/277VAC |
| Frame Type | NENL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Enclosures, Control Panels, QED Switchboards |
| Wire Gauge | 14-2 AWG (Cu/Al) |
| Max Wire | 2 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat enclosures and panels are compatible with the NENL34050?
This breaker is designed for integration into Square D enclosures, control panels, and QED switchboards.
What wire sizes and materials are supported by the terminal lugs?
The lugs accept 14 AWG to 2 AWG wire and are rated for both copper (Cu) and aluminum (Al) conductors.
How is this circuit breaker mounted?
It utilizes a unit mount, feed-thru connection. This means it bolts directly to a backpan or mounting bracket rather than plugging into a panelboard busbar.
What protection is provided by the LI trip function?
The LI designation indicates Long-Time and Instantaneous trip functions. It uses thermal magnetic technology to protect circuits against both sustained overloads and sudden short circuits.
Can the trip curve be adjusted on this model?
No, the NENL34050 features fixed thermal and fixed magnetic trip settings.
What is the modern replacement for the NENL34050?
The Square D PowerPact HDL36050 is the modern substitute for this breaker, offering the same 50A rating, 3-pole configuration, and matching interrupting capacity.
What frame type is the NENL34050?
It belongs to the Square D NENL frame family, which is also cross-referenced as a Merlin Gerin Compact NSE100N type breaker.
What safety procedures are required before installing this unit mount breaker?
Always de-energize the control panel or QED switchboard completely and verify the absence of voltage with a properly rated testing device before mounting or wiring the breaker.
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