Schneider ElectricJDA36250U31X
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Square D JDA36250CU33X Molded Case Circuit Breaker
- 250A
- 3 Pole
- I-Line
Square D
JDA36250CU33X
Molded Case Circuit Breaker
Brand
Square D
SKU
JDA36250CU33X
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Square D JDA36250CU33X - 250A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial power distribution, the Square D JDA36250CU33X is a 3-pole, 250A molded case circuit breaker from the PowerPacT J-Frame family. It delivers reliable overcurrent protection for demanding electrical systems. This plug-on unit installs into Square D I-Line panelboards and switchboards. It serves as a drop-in, microprocessor-based upgrade for legacy KA36250 breakers. The breaker features a Micrologic 3.2S electronic trip unit with adjustable LSI settings.Specifications
| Brand | Square D |
|---|---|
| Part Number | JDA36250CU33X |
| Series | JDA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC |
| Amperage Range | 62.5-250A |
|---|
| Frame Type | JDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| 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 | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release |
|---|---|
| Accessories | MicroLogic 3.2S Trip Unit |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, IEC, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | 100% Rated, HACR Rated, Visual Trip Indicator, True RMS Sensing, Mercury Free, PVC Free |
Product FAQs
8 answersWhat is the difference between the JDA36250U33X and the JDA36250CU33X?
The standard JDA36250U33X is rated for 80% continuous load. The JDA36250CU33X includes a 'C' suffix, indicating it is 100% rated and can carry its full 250A capacity continuously without violating electrical code requirements for continuous loads.
What does the U33X suffix mean on this Square D breaker?
The U33X suffix indicates the breaker is equipped with a Micrologic 3.2S electronic trip unit. This provides adjustable Long-time, Short-time, and Instantaneous (LSI) standard protection.
Are the trip settings field-adjustable on the JDA36250CU33X?
Yes, the electronic trip unit allows field adjustment of the Long-time, Short-time, and Instantaneous (LSI) protective functions. This provides flexibility for selective coordination in complex electrical systems.
Can the JDA36250CU33X replace older KA-frame circuit breakers?
Yes, this PowerPacT J-Frame breaker serves as a direct, microprocessor-based upgrade for legacy Square D KA36250 I-Line breakers. It fits into the same I-Line panelboard spaces while offering advanced electronic trip functions.
Does the JDA36250CU33X provide ground-fault protection?
No, this model features an LSI trip unit, which does not include ground-fault protection. Applications requiring ground-fault protection need an LSIG trip unit, typically indicated by a U44X suffix.
How does the JDA36250CU33X install into a panelboard?
This breaker features an I-Line style plug-in connection. It is designed to drop directly into the bus of Square D I-Line panelboards and switchboards, allowing for fast installation without requiring additional mounting hardware.
Is the JDA36250CU33X compatible with non-Square D panels?
No, the I-Line plug-in mounting style is proprietary to Square D. This breaker is only compatible with Square D I-Line panelboards and switchboards.
What does the 'D' in the JDA36250CU33X part number signify?
In the PowerPacT nomenclature, the 'D' indicates the specific interrupting capacity tier of the breaker. It signifies the standard interrupting level, which provides up to 18kAIC at 480V, distinguishing it from higher-tier G, J, or L interrupting ratings.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
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Rating
13 reviews
- TCTeddy C.Verified BuyerReviewingSquare D JDA36250 - 250A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Great product and price
Great price and fast shipping. Customer service was great. I'll definitely order from here again
- JDJerry D.Verified BuyerReviewingSquare D JDA36225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/25/26A+++
Geat product , and service !
- DHDennis H.Verified BuyerReviewingSquare D JDA36200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/30/25Thank you
I was able to get the correct breaker and it came the next day as promised
- JMjohn m.Verified BuyerReviewingSquare D JDA36200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/6/25Exact replacement
Exceeded my expectations
- TSTom S.ReviewingSquare D JDA36175 - 175A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/12/22Breakers look good
Breakers look good and delivered on time