Square D JDM36250U31XSA Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Quantity
Square D JDM36250U31XSA - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for industrial control panels, the JDM36250U31XSA features a Micrologic 3.2 electronic trip unit providing adjustable long-time and instantaneous protection. This 250-amp, 3-pole unit-mount breaker includes a factory-installed 120VAC shunt trip for remote tripping capabilities. Rated at 25kAIC at 240V, the PowerPacT J-Frame offers true RMS sensing and current-limiting performance for commercial applications.Specifications
| Brand | Square D |
|---|---|
| Series | JDM |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Frame Type | JDM |
|---|---|
| Terminal Type | Lugs |
| For Use With | Industrial Control Panels, Switchboards, Motor Control Centers, Unit Mount Enclosures |
| Wire Gauge | 3/0 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment, Motor Operator, Rotary Handle, Terminal Shields |
|---|---|
| Accessories | Micrologic 3.2 Trip Unit (Factory Installed), Shunt Trip, Lugs (Line Side) |
| Standards | CSA C22.2 No 5, HACR, IEC 60947-2, NEMA AB 1, NOM-003-SCFI-2000, UL 489 |
| Approval | CCC, CE, CSA, IEC, NOM, UL, UKCA |
| Temp Rating | -25C to 70C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
8 answersWhat type of trip unit is included with the JDM36250U31XSA?
This breaker is equipped with a Micrologic 3.2 electronic trip unit, indicated by the U31X suffix. It provides adjustable Long-Time and Instantaneous (LI) protection, offering more precise coordination than standard thermal-magnetic trip units.
Can I install the JDM36250U31XSA in an I-Line panelboard?
No. The JDM frame is a unit-mount circuit breaker designed for feed-thru applications in switchboards, motor control centers, and standalone enclosures. For an I-Line panelboard, you would need a plug-on variant like the JDA frame.
What is the difference between the JDM36250U31XSA and the JDL36250U31XSA?
Both are 250A, unit-mount J-Frame breakers with the same trip unit and interrupting ratings. The difference is the terminal configuration. The JDL features mechanical lugs on both the line and load sides, while the JDM comes with lugs on the ON end and terminal nuts on the OFF end. You can use a JDM to replace a JDL by adding a load-side lug kit.
How are the trip settings adjusted on this breaker?
The Micrologic 3.2 trip unit features rotary dials on the front face of the breaker. These dials allow you to fine-tune the Long-Time pickup (Ir) and Instantaneous pickup (Ii) settings to match your specific load requirements and system coordination study.
Is the JDM36250U31XSA rated for 100% continuous duty?
No, this is a standard 80% rated circuit breaker. According to NEC guidelines for 80% rated breakers, the continuous load should not exceed 200 amps (80% of its 250A maximum rating) for periods of three hours or more.
Does this breaker support field-installable accessories?
Yes, the PowerPacT J-Frame supports a variety of field-installable internal accessories, including auxiliary switches, alarm switches, shunt trips, and undervoltage releases. These install easily behind the front accessory cover.
What does the SA suffix indicate on the JDM36250U31XSA?
The SA suffix means this breaker comes with a factory-installed shunt trip accessory rated for 120VAC. This allows the breaker to be tripped remotely by applying a voltage signal to the shunt trip coil.
Does the JDM36250U31XSA feature a push-to-trip button?
Yes, like all PowerPacT J-Frame breakers, it includes an integral push-to-trip button on the front cover. This allows you to manually trip the breaker to verify the mechanical operation of the trip mechanism.
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