Square D - JJA36250U43X 250A 3-Pole 600V I-Line Solid State Circuit Breaker
Square D - JJA36250U43X 250A 3-Pole 600V I-Line Solid State Circuit Breaker
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The Square D JJA36250U43X is a 3-pole, 250-amp solid-state molded case circuit breaker (MCCB) rated for 600VAC with I-Line plug-in mounting. Manufactured by Schneider Electric, this JJ-frame electronic trip breaker delivers adjustable, highly accurate overcurrent protection for large industrial feeder circuits and main distribution applications. Available in new and used (reconditioned) condition, it is a high-performance solution for three-phase 600V systems requiring selective coordination.
Specifications
| Attribute | Value |
|---|---|
| Part Number | JJA36250U43X |
| Manufacturer | Square D / Schneider Electric |
| Amperage Rating | 250A |
| Voltage Rating | 600VAC |
| Number of Poles | 3 |
| Trip Type | Solid State (Electronic) |
| Mount Type | I-Line Plug-In |
| Interrupting Rating | 65kA @ 600V |
| Standard | UL 489 Listed |
| Frame Series | JJ |
Key Features
- Solid-state electronic trip unit with adjustable long-time, short-time, and instantaneous settings
- I-Line plug-in mounting for quick installation in Square D JJ-frame compatible switchboards
- 250-amp rating for large feeder and sub-main circuit protection
- 3-pole design for three-phase 600V industrial power systems
- High 65kA interrupting rating at 600V for demanding environments
- Available new and reconditioned — all units tested prior to shipment
Common Applications
- 250A feeder and main circuit protection in industrial 600V switchboards
- Motor control center (MCC) main incoming feeds
- Sub-main protection in large industrial and commercial facilities
- Process plant and manufacturing facility power distribution
- Selective coordination systems requiring adjustable trip settings
Frequently Asked Questions
What is the Square D JJA36250U43X?
The JJA36250U43X is a 250-amp, 3-pole, 600V solid-state I-Line plug-in MCCB from Square D (Schneider Electric). It is used for main and feeder overcurrent protection in three-phase industrial and commercial 600V electrical distribution systems.
What is the difference between JJA36250U43X and JJA36250U44X?
Both are Square D 250A, 3-pole, 600V I-Line solid-state MCCBs in the JJ frame. The U43X and U44X suffixes indicate different rating plug configurations for the electronic trip unit, which affects the adjustable current pickup range. Consult Schneider Electric to confirm which plug is correct for your system coordination study.
Is the JJA36250U43X available in used condition?
Yes. Alpha Brokers & Controls stocks the JJA36250U43X in both new and used (reconditioned) condition. All used breakers are inspected and tested before shipping to ensure reliable operation.