Square D JJL36250C Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Square D
JJL36250C
Molded Case Circuit Breaker
Brand
Square D
SKU
JJL36250C
Quantity
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Square D JJL36250C - 250A 3 Pole Molded Case Circuit Breaker
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Description
Designed for continuous operation without derating, the JJL36250C delivers 100% rated, 250-amp thermal-magnetic protection. This 3-pole PowerPacT J-Frame device provides dependable long-time and instantaneous (LI) trip functions for demanding industrial environments. It installs into Square D enclosures, switchboards, and motor control centers using the included AL250JD lugs. Delivering a 65 kAIC rating at 480VAC, this current-limiting breaker features an adjustable magnetic trip and Visi-Trip.Specifications
| Brand | Square D |
|---|---|
| Series | JJL |
| 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 |
| Frame Type | JJL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Industrial Enclosures, Switchboards, Motor Control Centers |
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Lugs (AL250JD) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, 100% Rated |
Product FAQs
8 answersWhat does the "C" suffix mean in the JJL36250C catalog number?
The "C" suffix indicates that this circuit breaker is 100% rated. This allows the breaker to carry its full 250A continuous current rating without the standard 80% derating, provided it is installed with 90-degree Celsius rated wire in a properly sized and ventilated enclosure.
What does the second "J" in the JJL36250C part number represent?
The second "J" indicates the breaker's interrupting rating tier within the Square D PowerPacT family. For this model, it signifies an interrupting capacity of 100kAIC at 240VAC, 65kAIC at 480VAC, and 25kAIC at 600VAC.
Is the JJL36250C an I-Line or unit-mount breaker?
The JJL36250C is a unit-mount, feed-thru circuit breaker. The "L" in the catalog number indicates it comes factory-equipped with lugs on both the line and load sides. It is not compatible with I-Line plug-on panelboards.
Is the JJL36250C suitable for reverse-fed applications?
Yes, standard thermal-magnetic PowerPacT J-Frame breakers like the JJL36250C can be reverse-fed. This means the incoming line power can be connected to either the top or bottom lugs without affecting the breaker's protective functions.
What type of trip unit does the JJL36250C use?
It is equipped with a thermal-magnetic trip unit featuring fixed thermal (Long-Time) and adjustable magnetic (Instantaneous) protection. This allows users to fine-tune the instantaneous trip threshold for specific application needs.
What wire sizes are compatible with the JJL36250C lugs?
The standard line and load lugs accept either aluminum or copper (Al/Cu) conductors ranging from 3/0 AWG to 350 kcmil. Ensure proper torque specifications are followed during installation.
Can the JJL36250C be used in DC electrical systems?
Yes, this breaker is rated for use in DC systems up to 250VDC, providing an interrupting rating of 20kAIC at that voltage. It is suitable for both AC and DC applications.
Where is the JJL36250C typically installed?
This unit-mount breaker is commonly installed in Square D industrial enclosures, switchboards, and motor control centers that require a 250A, 3-pole configuration.
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