Square D JJA36175 Molded Case Circuit Breaker | 175A 3-Pole 600V I-Line Plug-In
Square D JJA36175 Molded Case Circuit Breaker | 175A 3-Pole 600V I-Line Plug-In
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The Square D JJA36175 is a heavy-duty, 3-pole molded case circuit breaker (MCCB) from the PowerPact™ J-Frame series by Schneider Electric. Rated at 175 Amps and 600VAC, this I-Line plug-in breaker is engineered for reliable overload and short-circuit protection in commercial and industrial power distribution systems.
With its thermal-magnetic trip unit, the JJA36175 delivers Long-Time (L) and Instantaneous (I) protection — offering precise, dependable response to both sustained overloads and sudden fault conditions. The I-Line plug-in design ensures fast, secure installation into Square D I-Line panelboards and switchboards, making it ideal for new installations, retrofits, and upgrades.
Key Specifications
- Part Number: JJA36175
- Manufacturer: Square D by Schneider Electric
- Series: PowerPact™ J-Frame (JJA)
- Ampere Rating: 175A
- Voltage Rating: 600VAC / 250VDC
- Poles: 3-Pole, 3-Phase
- Phase Connection: ABC
- Interrupting Rating: 65kA @ 480VAC | 25kA @ 600VAC | 100kA @ 240VAC
- Trip Type: Thermal-Magnetic | LI – Long-Time & Instantaneous
- Continuous Current Rating: 80%
- Connection Type: I-Line™ Plug-In (Line Side) / Mechanical Lug (Load Side)
- Wire Range: 4 AWG to 4/0 AWG (Copper or Aluminum)
- Mounting Style: Plug-On / I-Line
- Frequency: 50/60 Hz
- Operating Temperature: -25°C to 70°C (-13°F to 158°F)
- Dimensions: 4.12" W × 5" D × 7.52" H
- Frame: J-Frame
- Trip Setpoints: 875A (Low) / 1750A (High)
- HACR Rated: Yes
- Reverse Feed: Suitable for reverse-fed applications
- Visi-Trip Indicator: Yes
Certifications & Compliance
- ✅ UL Listed (UL 489)
- ✅ CSA Certified
- ✅ CE Marked
- ✅ IEC Certified
- ✅ NOM Certified
- ✅ RoHS Compliant
- ✅ Mercury Free & PVC Free
- ✅ Current Limiting
- ✅ Non-Interchangeable Trip
What Is the Square D JJA36175?
The JJA36175 is a molded case circuit breaker (MCCB) — a switching and protective device designed to safeguard electrical circuits from damage caused by excess current. Unlike fuses, MCCBs can be reset after a trip event, making them ideal for protecting feeder and branch circuits in commercial buildings, industrial facilities, and data centers.
The "JJA" designation indicates this breaker belongs to Square D's PowerPact J-Frame family, which covers 15A to 250A applications and is compatible with Square D I-Line panelboards and switchboards. The I-Line plug-in design simplifies installation and replacement without requiring extensive rewiring.
Common Applications
- Commercial and industrial power distribution panels
- Feeder and branch circuit protection
- I-Line style panelboards and switchboards
- Manufacturing facilities and process equipment
- Data centers and critical infrastructure
- Upgrade/replacement for legacy KC36175 and KH36175 breakers
Why Choose the JJA36175?
The Square D PowerPact J-Frame series is trusted by electrical engineers and contractors worldwide for its rugged construction, flexible accessory options, and proven protection performance. The JJA36175 delivers 65kA interrupting capacity at 480VAC — well above the interrupting demands of most commercial and industrial installations — ensuring maximum protection in high-fault environments.
Its I-Line plug-in connection provides a clean, efficient installation experience, reducing downtime during panel upgrades or emergency replacements. The non-interchangeable thermal-magnetic trip unit ensures consistent, tamper-resistant performance over the life of the breaker.
Frequently Asked Questions
What panelboards is the JJA36175 compatible with?
The JJA36175 is designed for Square D I-Line style panelboards and switchboards that accept J-Frame plug-in breakers.
What is the interrupting rating of the JJA36175?
The JJA36175 has an interrupting rating of 65kA at 480VAC, 25kA at 600VAC, and 100kA at 240VAC.
Can the JJA36175 replace a KC36175 or KH36175?
Yes. The JJA36175 is a direct upgrade replacement for legacy Square D KC36175 and KH36175 circuit breakers in compatible I-Line panelboards.
Is the JJA36175 suitable for reverse-fed applications?
Yes, the JJA36175 is rated and listed for reverse-fed applications.
What wire sizes does the JJA36175 accept?
The JJA36175 accepts wire sizes from 4 AWG to 4/0 AWG for both copper and aluminum conductors on the load side lug terminals.
What trip functions does the JJA36175 have?
The JJA36175 features a thermal-magnetic trip unit with Long-Time (L) and Instantaneous (I) trip functions for overload and short-circuit protection.