Square D JDA36250SA Molded Case Circuit Breaker
- 250A
- 3 Pole
- I-Line
Quantity
Square D JDA36250SA - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed for advanced control, the Square D JDA36250SA is a 3-pole, 250A PowerPacT J-Frame MCCB featuring a factory-installed 120V shunt trip. Utilizing an I-Line plug-on connection, it mounts into Square D I-Line panelboards and switchboards. It also replaces legacy KA36250 breakers. It delivers thermal-magnetic protection with an 18 kAIC rating at 480VAC. The integrated shunt trip enables remote disconnection for added safety.Specifications
| Brand | Square D |
|---|---|
| Series | JDA |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| 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 | 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 |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL, CCC |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Mercury Free, PVC Free |
Product FAQs
7 answersWhat does the "SA" suffix indicate on the JDA36250SA circuit breaker?
The "SA" suffix designates that this PowerPacT J-frame breaker includes a factory-installed shunt trip with a control voltage of 110-130 VAC. This accessory allows the breaker to be opened remotely via an external control signal.
Which panelboards are compatible with the JDA36250SA circuit breaker?
This breaker features an I-Line style plug-in connection and is designed exclusively for use in Square D I-Line panelboards and switchboards. It cannot be used in standard unit-mount applications or non-I-Line enclosures.
How does the trip unit operate on the JDA36250SA?
It utilizes a thermal-magnetic trip mechanism with LI (Long-Time and Instantaneous) functions. The thermal element provides fixed overload protection, while the magnetic instantaneous trip is adjustable, allowing electricians to coordinate the short-circuit response with other devices in the system.
Does the JDA36250SA require bolted line-side connections?
No, the I-Line mounting style features plug-on jaws that connect directly to the panelboard bus stack. Only the load-side connections require wiring to the factory-installed lugs, which accept 3/0 AWG to 350 kcmil aluminum or copper conductors.
Is the JDA36250SA suitable for direct current (DC) systems?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for use in DC systems up to 250VDC, where it provides an interrupting capacity of 20kA.
Can the JDA36250SA replace an older Square D KA-frame circuit breaker?
Yes, the PowerPacT J-frame is the direct modern replacement for legacy Square D KA-frame breakers. It will fit into the same I-Line panelboard space as an older KA36250. Just verify that the 18kA at 480V interrupting rating meets your system requirements and that your application requires the 120V shunt trip included on this SA model.
What safety precautions should be taken before adjusting the magnetic trip settings on the JDA36250SA?
Adjustments to the instantaneous magnetic trip settings should only be performed by a qualified electrician after a proper coordination study. Incorrect settings can compromise system safety by causing nuisance tripping or failing to clear a short-circuit fault in the required time.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.