Square D JJA36250SA Molded Case Circuit Breaker
- 250A
- 3 Pole
- I-Line
Quantity
Square D JJA36250SA - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Providing advanced control for industrial systems, the Square D JJA36250SA features a factory-installed 120VAC shunt trip. This 250A PowerPacT J-Frame breaker utilizes a thermal-magnetic trip unit for reliable LI protection. Designed for plug-on convenience, it installs into Square D I-Line panelboards and switchboards, replacing legacy KC36250 and KH36250 models. With a 65kAIC rating at 480VAC, this MCCB includes a Visi-Trip indicator and is HACR rated for commercial HVAC applications.Specifications
| Brand | Square D |
|---|---|
| Series | JJA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | JJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Square D I-Line Switchboards |
| Wire Gauge | 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 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 | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Terminal Shields |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NEMA, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, Non-Interchangeable Trip, Mercury Free, PVC Free |
Product FAQs
7 answersWhat does the "SA" suffix mean on the JJA36250SA?
The "SA" suffix indicates that this breaker includes a factory-installed 110-130VAC shunt trip. This accessory allows the breaker to be tripped remotely for safety or control purposes.
Can the JJA36250SA replace older Square D K-Frame breakers?
Yes, the PowerPacT J-Frame is the modern replacement for legacy 250A K-Frame breakers. The JJA36250SA can replace older I-Line models like the KA36250, KC36250, and KH36250, provided the shunt trip accessory is required for your application.
What is the difference between the JJA36250SA and the JGA36250SA?
The difference lies in their interrupting capacity. The JJA series offers a higher interrupting rating of 65kA at 480VAC, whereas the JGA series is rated for 35kA at 480VAC. Both share the same physical dimensions, I-Line mounting, and factory-installed shunt trip.
How is the JJA36250SA installed in an electrical panel?
This breaker features an I-Line plug-on connection for the line side, allowing it to snap directly onto the busbar of compatible Square D I-Line panelboards and switchboards. The load side utilizes mechanical lugs for standard wire termination.
Can I change the shunt trip voltage on the JJA36250SA?
Yes. Although the 110-130VAC shunt trip comes factory-installed, PowerPacT J-Frame breakers feature a modular accessory compartment. This allows you to field-install a different shunt trip or undervoltage release if your control circuit requirements change.
How does the factory-installed shunt trip improve safety?
The 110-130VAC shunt trip allows the breaker to be opened remotely via a control signal. This is commonly used to tie the breaker into fire alarms, emergency stop (E-stop) buttons, or other safety interlock systems, ensuring power is immediately cut during an emergency.
How does the adjustable magnetic trip on the JJA36250SA benefit my installation?
The adjustable magnetic trip allows you to fine-tune the instantaneous short-circuit protection threshold. This is particularly useful for preventing nuisance tripping during high inrush currents, such as when starting large motors, while still maintaining strict safety compliance.
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