Square D JJA36250U31X 250A 3-Pole 600V I-Line Solid State Circuit Breaker
Square D JJA36250U31X 250A 3-Pole 600V I-Line Solid State Circuit Breaker
Product images are representative only. Actual product may vary.
The Square D JJA36250U31X 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 breaker features an adjustable electronic trip unit for precise overcurrent protection of large industrial feeder and main circuits in three-phase 600V systems.
Specifications
| Attribute | Value |
|---|---|
| Part Number | JJA36250U31X |
| 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
- Adjustable solid-state trip unit with long-time, short-time, and instantaneous settings for selective coordination
- I-Line plug-in mounting for fast installation in Square D JJ-frame compatible switchboards
- 250A rating for large industrial feeder and main circuit protection
- 3-pole for complete three-phase 600V protection
- High 65kA interrupting rating at 600V
- UL 489 Listed, NEC compliant
Common Applications
- Industrial feeder and sub-main protection in 600V switchboards
- Motor control center (MCC) main incoming protection
- Heavy manufacturing and process facility power distribution
- Systems requiring selective coordination with adjustable trip settings
- Data center and critical infrastructure 600V feeder circuits
Frequently Asked Questions
What is the Square D JJA36250U31X?
The JJA36250U31X is a 250-amp, 3-pole, 600V solid-state I-Line plug-in MCCB from Square D used to protect large feeder and main circuits in three-phase 600V industrial and commercial electrical distribution systems.
What does U31X mean in the JJA36250U31X part number?
The U31X suffix identifies the rating plug configuration of the solid-state electronic trip unit, which sets the adjustable current pickup range. This differs from U33X and U44X variants. Consult Schneider Electric documentation to confirm the correct plug for your coordination study.
How does the JJA36250U31X differ from JJA36250U33X or JJA36250U44X?
All three are Square D 250A, 3-pole, 600V I-Line solid-state JJ-frame MCCBs. The U31X, U33X, and U44X suffixes indicate different rating plug configurations that affect the adjustable trip current range of the electronic trip unit. Select the correct suffix based on your protection coordination requirements.