Square D RJF36120CU44A Molded Case Circuit Breaker
- 1200A
- 3 Pole
- Unit Mount
Quantity
Square D RJF36120CU44A - 1200A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for heavy-duty applications, this 1200A Square D electronic trip MCCB delivers robust performance in industrial environments. Featuring a standard unit-mount design, the RJF36120CU44A integrates into QED switchboards and Model 6 motor control centers via secure busbar connections. A factory-installed Micrologic 6.0A trip unit offers comprehensive LSIG protection with an integrated ammeter. This 100% rated breaker provides a 65kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | RJF36120CU44A |
| Series | RJF |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 480-1200A |
|---|
| Terminal Type | Busbar Connection |
|---|---|
| For Use With | QED Switchboards, Model 6 Motor Control Centers, Power-Style Switchboards |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSIG |
| Trip Function | Long-Time, Short-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 6.0A |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Lug Kits, Communication Module |
|---|---|
| Accessories | Lugs Not Included, Micrologic 6.0A Trip Unit (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, 100% Rated, True RMS Sensing |
Product FAQs
6 answersWhat does the C in the RJF36120CU44A catalog number signify?
The C indicates that this circuit breaker is 100% rated. It can carry its full 1200A continuous current rating without the standard 80% derating, provided it is installed in a properly sized and ventilated enclosure using 90C rated wire sized to the 75C ampacity column.
What protection functions are included with the Micrologic 6.0A trip unit on this breaker?
The U44A suffix indicates it is equipped with a Micrologic 6.0A electronic trip unit featuring LSIG protection. This provides adjustable Long-Time, Short-Time, Instantaneous, and Ground-Fault protection, along with an integrated ammeter for current monitoring.
How is the RJF36120CU44A mounted in an electrical system?
This is a unit-mount circuit breaker designed for direct busbar connections on both the line and load sides. It does not use I-Line plug-on connections or standard cable lugs out of the box, though optional lug kits can be field-installed if cable connections are required.
Which switchboards and motor control centers are compatible with this R-Frame breaker?
The RJF36120CU44A is designed for integration into Square D QED Switchboards, Power-Style Switchboards, and Model 6 Motor Control Centers.
Can the Micrologic trip unit on this R-Frame breaker be swapped in the field?
Yes, PowerPacT R-Frame circuit breakers with Micrologic trip units allow the trip unit to be interchanged in the field. This provides flexibility if your protection or metering requirements change, unlike basic ET 1.0I electronic trip units which are fixed.
Does this breaker provide a way to manually disconnect power for maintenance?
Yes, like all PowerPacT circuit breakers, it features an integral push-to-trip button on the front cover. This allows qualified personnel to manually trip the breaker to verify the mechanism is working and safely disconnect power before servicing equipment.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
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.
Same Day Shipping
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.