Square D JDA36125 3 Pole 125 Amp 600V Circuit Breaker

The Square D JDA36125 is a 125-amp, 3-pole, 600V PowerPact J-Frame molded case circuit breaker for I-Line plug-in applications. It provides thermal-magnetic LI protection with a 14 kAIC interrupting rating at 600VAC and 18 kAIC at 480VAC. The JDA36125 is 80% rated for continuous loading, meaning it can carry 100A continuously in a 40°C ambient environment. The I-Line plug-in design allows for quick installation and removal in Square D I-Line panelboards without tools. Dual-break rotating contacts reduce peak let-through current during fault conditions, and the integral push-to-trip button enables manual testing. UL 489 Listed, CSA Certified, and IEC 60947-2 compliant. The JDA36125 is a direct replacement for legacy FA36125, FH36125, and HFD3125 I-Line breakers and is widely used in commercial and industrial feeder applications.

JDA36125 Specifications

Specification	Value
Amperage	125A
Poles	3
Voltage	600VAC / 250VDC
Interrupt Rating	25kA @ 240V · 18kA @ 480V · 14kA @ 600V
Frame Size	J-Frame (250A Frame)
Mounting Type	I-Line Plug-In
Trip Type	Thermal Magnetic
Trip Function	LI — Long-Time, Instantaneous
Wire Size	3/0 AWG to 350 kcmil (Al/Cu)
Phase	3-Phase
Standards	UL 489, CSA C22.2 No.5, IEC 60947-2
Temperature Rating	-13°F to 158°F (-25°C to 70°C)

Key Features

• PowerPact J-Frame I-Line plug-in construction for tool-free installation and removal
• Dual-break rotating contacts reduce peak let-through current during short circuits
• Integral push-to-trip button for manual testing without external tools
• 80% continuous current rating for NEC code compliance
• Thermal-magnetic LI trip — long-time overload and instantaneous short-circuit protection
• 14 kAIC @ 600VAC / 18 kAIC @ 480VAC / 25 kAIC @ 240VAC interrupting ratings

Applications

• Commercial building feeder and branch circuit protection
• Industrial power distribution panels
• Manufacturing facility main and sub-feeder protection
• Data center power distribution units (PDUs)
• Motor control center (MCC) feeder protection

Replaces: FA36125, FH36125, HFD3125, FC36125

Buy JDA36125 Circuit Breaker

Square D PowerPact J-Frame JDA 125A 3-pole circuit breaker. In stock at AllBreakerSales.com. Call (877) 611-0034 for same-day pricing. Genuine OEM parts, ships from US warehouse.

Brand: Square D | Series: PowerPact J-Frame JDA | Catalog Number: JDA36125

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