Square D NA36900 Molded Case Circuit Breaker
- 900A
- 3 Pole
- I-Line
Quantity
Square D NA36900 - 900A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial environments, the Square D NA36900 is a 3-pole, 900A molded case circuit breaker providing thermal-magnetic LI protection. This legacy N-Frame unit features an I-Line mounting style for seamless integration into Square D panelboards and switchboards. Rated for 50kAIC at 480VAC, it includes an adjustable magnetic trip and HACR certification. For modern upgrades, this model is replaced by the PowerPact PJA36100U31A when the trip is set to 900A.Specifications
| Brand | Square D |
|---|---|
| Part Number | NA36900 |
| Series | NA |
| Amperage | 900A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC |
| Frame Type | NA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (4) 3/0 AWG - 600 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Lugs (AL1200NA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Trip-Free Mechanism |
Product FAQs
6 answersWhat panelboards are compatible with the NA36900 circuit breaker?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features an I-Line style plug-in connection that mounts directly to the bus assembly.
What is the magnetic trip adjustment range for this breaker?
The NA36900 features a fixed thermal and adjustable magnetic trip system. The magnetic instantaneous trip can be adjusted from a low setting of 5000A to a high setting of 10000A.
What wire sizes are supported by the standard lugs on the NA36900?
The breaker uses AL1200NE6 lugs, which accept four conductors per phase. The supported wire range is 3/0 AWG to 600 kcmil for both aluminum and copper conductors.
Is the NA36900 part of a legacy breaker series?
Yes, this is a legacy Square D N-frame molded case circuit breaker. It serves as a direct drop-in replacement for existing 900A I-Line applications, eliminating the need to retrofit older switchboards with newer frame types.
What does the LI trip function code indicate on this N-frame breaker?
The LI code stands for Long-Time and Instantaneous protection. The Long-Time component handles sustained thermal overloads, while the Instantaneous magnetic component clears high-level short circuits.
Does the I-Line connection require additional mounting hardware?
No, the I-Line style plug-in design features integrated jaws that connect directly to the panelboard bus. This allows for faster installation compared to traditional bolted-style breakers.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 28 reviews.
- JMJimmy M.Verified BuyerReviewingFederal Pacific NA230 - 30A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/8/26NA230-30
Breaker arrived well packaged and sealed. Installed easily and working great for the customer.
- JEJames E.Verified BuyerReviewingFederal Pacific NA250 - 50A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/23/26Satisfactory
Fast shipping and exactly as expected
- EDErik D.Verified BuyerReviewingFederal Pacific NA250 - 50A 2 Pole Miniature Circuit BreakerI do not recommend this productRated 1 out of 5 stars7/21/26Result of FP
Breakers were wrong size and could not be useful....lost monies.
- JLJeff L.Verified BuyerReviewingFederal Pacific NA20 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/22/26Hard to find breaker
Fit perfectly. Great service
- PPPaul P. J.Verified BuyerReviewingFederal Pacific NA20 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/27/25perfect ...
all is great in the universe the FP 20A Breaker worked perfect.