Engineered for commercial use, the NEG631040 is a 3-pole, 40A molded case circuit breaker from Federal Pacific. It provides essential overcurrent protection for 600VAC electrical systems. This bolt-on breaker installs into legacy Federal Pacific panelboards and switchboards. It acts as a direct replacement for discontinued hardware and substitutes the NEF431040. Equipped with a fixed thermal-magnetic trip unit, it delivers reliable LI protection and is rated for 14 kAIC at 480VAC.
Federal Pacific Panelboards, Federal Pacific Switchboards
Wire Gauge
14-1/0 AWG
Max Wire
1/0 AWG
Min Wire
14 AWG
Protection and operation
Trip Technology
Thermal Magnetic
Trip Function Code
LI
Trip Function
Long-Time, Instantaneous
Trip Adjustability
Fixed Thermal, Fixed Magnetic
Standards and features
Available Options
Shunt Trip, Undervoltage Release, Bell Alarm, Auxiliary Switch
Accessories
Load Side Lugs Included
Standards
CSA C22.2, UL 489
Approval
CSA, UL
Temp Rating
40C
Construction Features
Non-Interchangeable Trip
Product FAQs
6 answers
What panels are compatible with the NEG631040 circuit breaker?
This breaker is designed for installation in legacy Federal Pacific panelboards and switchboards that accept N-frame molded case circuit breakers.
Can the NEG631040 replace older NEF series breakers?
Yes, the NEG631040 serves as a direct drop-in replacement for the older NEF631040 circuit breaker. It mounts into the same enclosures without requiring any adapters.
Is there a higher interrupting capacity alternative to the NEG631040?
Yes, the HEG631040 is an exact drop-in replacement that offers a higher interrupting capacity of 22kAIC at 480V, compared to the 14kAIC rating of the standard NEG631040.
What wire sizes are accepted by the lugs on this breaker?
The terminal lugs on the NEG631040 accept wire gauges ranging from 14 AWG to 1/0 AWG.
Are the thermal and magnetic trip settings adjustable on this breaker?
No, the NEG631040 features fixed thermal and fixed magnetic trip settings for its long-time and instantaneous protection functions.
How does this breaker mount into the panelboard?
The NEG631040 utilizes a bolt-on connection type to secure directly to the busbars in compatible Federal Pacific distribution equipment.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.