Square D RJA361200CU31A RJA36120CU31A - 1200A 3 Pole Molded Case Circuit Breaker
- 1200A
- 3 Pole
- I-Line
Quantity
Square D RJA36120CU31A - 1200A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial applications, the Square D RJA361200CU31A is a 1200A, 3-pole molded case circuit breaker from the PowerPact R-Frame series. It provides robust power distribution and precise overcurrent protection. This breaker installs into standard Square D I-Line panelboards and switchboards via a secure plug-on connection. Rated 65 kAIC at 480V, it features a Micrologic 3.0 electronic trip unit with adjustable long-time and instantaneous (LI) functions and true RMS sensing.Specifications
| Brand | Square D |
|---|---|
| Part Number | RJA361200CU31A |
| Series | RJA |
| Amperage | 1200A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | I-Line Panelboards, I-Line Switchboards |
| Wire Gauge | 4x 3/0 AWG - 600 kcmil (Al/Cu) |
| Max Wire | 600 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Trip Unit Model | MicroLogic 3.0 |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Load Side Lugs (AL1200R53K) |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, NMX J-266, UL 489 |
| Approval | CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | 100% Rated, HACR Rated, True RMS Sensing |
Product FAQs
7 answersWhat does the 'C' in the RJA36120CU31A catalog number indicate?
The 'C' indicates that this breaker is 100% rated for continuous duty. Standard-rated breakers, which lack the 'C' designation, are typically limited to 80% continuous load.
What trip unit is included with the RJA36120CU31A?
This breaker includes a Micrologic 3.0 electronic trip unit, indicated by 'U31' in the part number. It provides adjustable Long-Time and Instantaneous (LI) trip functions. The 'A' at the end of the catalog number signifies it comes with the standard 'A' rating plug.
Does the RJA36120CU31A provide ground fault protection?
No, this specific model is equipped with a Micrologic 3.0 trip unit (LI), which provides Long-Time and Instantaneous protection only. For equipment ground fault protection (LSIG), a breaker with a Micrologic 6.0 trip unit is required.
What type of panels is the RJA36120CU31A compatible with?
The RJA36120CU31A features an I-Line style plug-in connection, indicated by the 'A' following the interrupting rating. It is designed exclusively for use in Square D I-Line panelboards and switchboards.
How is the RJA36120CU31A installed into the panelboard?
It utilizes Square D's I-Line plug-in mounting system. The breaker's jaws push directly onto the I-Line bus stack, and it is secured with a mounting bracket. This allows for faster installation compared to traditional bolt-on breakers.
Can the rating plug be swapped on this breaker?
Yes, the 'A' at the end of the RJA36120CU31A catalog number indicates it ships with a standard 'A' rating plug, which matches the 1200A sensor. The Micrologic trip unit allows the rating plug to be changed in the field if a lower maximum amperage limit is required for the application.
How do I identify the interrupting rating from the RJA36120CU31A catalog number?
The second letter, 'J', denotes the interrupting rating tier. In the PowerPacT R-Frame series, the J-rating provides 65kAIC at 480VAC. Other options in this frame include G, K, and L interrupting ratings.
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