Square D NENL34020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Unit Mount
Quantity
Square D NENL34020 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering robust circuit protection, the Square D NENL34020 is a 3-pole, 20A unit mount molded case circuit breaker providing long-time and instantaneous (LI) protection. This device installs into Square D enclosures, control panels, and QED switchboards. When maintenance requires a newer generation replacement, this model is superseded by the HDL36020 frame. With an 18kA interrupting rating at 480Y/277VAC, it effectively manages fault currents.Specifications
| Brand | Square D |
|---|---|
| Part Number | NENL34020 |
| Series | NENL |
| Amperage | 20A |
| 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 | 14-4 AWG (Cu/Al) |
| Max Wire | 4 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
6 answersWhat equipment is the Square D NENL34020 compatible with?
This unit-mount circuit breaker is designed for installation in standard Square D enclosures, industrial control panels, and QED switchboards. Because it is a feed-thru breaker, it is not compatible with I-Line panelboards or plug-on load centers.
What is the modern replacement for the NENL34020 circuit breaker?
The NENL34020 is a legacy E-frame breaker. For new installations or direct replacements, facilities can use the Square D PowerPacT HDL36020. The HDL36020 is a unit-mount H-Frame breaker that matches the 20A, 3-pole configuration and 18kAIC at 480VAC rating.
How is the NENL34020 mounted inside a panel?
The NENL34020 features a unit-mount design. It fastens directly to an enclosure backplate or mounting pan using hardware, rather than plugging onto a busbar. It utilizes mechanical lugs for both line and load connections.
What type of wire connections does the NENL34020 use?
The breaker is equipped with standard mechanical lugs on both the line and load sides. These lugs are rated for dual-rated copper or aluminum (Cu/Al) conductors ranging from 14 AWG to 4 AWG. Proper torque must be applied during installation to ensure a secure feed-thru connection.
How does the thermal-magnetic trip unit function on the NENL34020?
The breaker uses fixed thermal and magnetic elements to provide LI (Long-Time and Instantaneous) protection. The thermal component responds to sustained overloads by heating a bimetallic strip, while the magnetic component reacts immediately to high-level short-circuit faults to protect downstream equipment.
Can the NENL34020 be used on 240V and 480V systems?
Yes, this breaker is rated for use on both 240VAC and 480VAC systems. Its fault-clearing capacity scales with the system voltage, providing up to 25kAIC of protection at 240V and 18kAIC at 480V.
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