Square D JJF36250SO Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
Square D JJF36250SO - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Belonging to Square D's PowerPacT J-frame lineup, the JJF36250SO is a 3-pole, 250A molded case circuit breaker. It delivers reliable thermal-magnetic protection with fixed long-time and adjustable instantaneous trip functions. This unit-mount breaker features busbar connections (F-termination) and installs into compatible Square D switchboards. It includes a factory-installed 24VDC shunt trip (SO suffix) for remote tripping. Rated at 65kAIC at 480VAC, it is HACR rated for HVAC applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | JJF36250SO-R |
| Series | JJ |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Terminal Type | Busbar Connection |
|---|---|
| For Use With | Square D Switchboards, Motor Control Centers, Enclosures |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release, Rotary Handle, Terminal Shields, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Lugs Not Included, Shunt Trip (Factory Installed), Mounting Hardware |
| 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, Visual Trip Indicator, 80% Rated |
Product FAQs
10 answersWhat does the SO suffix mean on the Square D JJF36250SO?
The SO suffix indicates that this circuit breaker includes a factory-installed 24VDC shunt trip (accessory part number S29390) for remote tripping capabilities.
Does the JJF36250SO come with standard line and load lugs?
No, the F in the catalog number indicates it has busbar connections (F-termination) on both the line and load sides rather than standard mechanical lugs.
Which enclosures and equipment are compatible with the JJF36250SO?
This unit-mount breaker is designed for use in compatible Square D switchboards, motor control centers, and individual circuit breaker enclosures.
What is the continuous current rating of the JJF36250SO?
This breaker is standard 80% rated, meaning the continuous load should not exceed 80% of its 250A nominal rating (200A continuous) per NEC guidelines.
How do I adjust the trip settings on the JJF36250SO?
This breaker features a thermal-magnetic trip unit with fixed long-time (thermal) protection and adjustable instantaneous (magnetic) protection. The magnetic trip threshold can be adjusted using the dials on the front of the breaker.
How can I manually test the tripping mechanism on this J-frame breaker?
All Square D PowerPacT J-frame circuit breakers feature an integral push-to-trip button on the front cover, allowing you to manually trip the breaker to verify the mechanical operation.
Is the JJF36250SO suitable for HVAC applications?
Yes, this circuit breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment.
Can I field-install a different shunt trip voltage if my control circuit is not 24VDC?
Yes, the factory-installed 24VDC shunt trip (S29390) can be removed and replaced in the field with a different PowerPacT J-frame shunt trip accessory matching your control voltage.
Is the JJF36250SO an I-Line or unit-mount breaker?
This is a unit-mount circuit breaker. It is not compatible with I-Line panelboards, which require breakers with plug-on I-Line jaw connections.
Does the JJF36250SO provide ground fault protection?
No, this breaker has an LI trip function (Long-Time and Instantaneous) and does not include integral ground fault protection.
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