Square D HJA36100YP Molded Case Circuit Breaker

Square D (Schneider Electric) HJA36100YP — PowerPact H Molded Case Circuit Breaker

A 3-pole, 100 A, 600 V AC I-Line molded case circuit breaker (MCCB) from the Square D PowerPact H / J-frame family, equipped with a thermal-magnetic trip unit and a padlockable toggle handle, designed for mains and branch-circuit protection in industrial and commercial power distribution.

Key Technical Specifications

表格

Advantages & Features

• High interrupting capacity — 25 kA at 480/600 V AC provides robust fault protection in heavy industrial distribution systems.
• Thermal-magnetic protection — inverse-time thermal trip for overloads plus instantaneous magnetic trip for short circuits, suitable for both feeder and motor-circuit duty.
• I-Line plug-on design — quick, tool-light busbar installation and removal; saves panel space versus bolted lugs.
• Padlockable handle — supports lockout/tagout (LOTO) for safe maintenance and isolation.
• Proven PowerPact H platform — 4.5 in frame width, compatible with existing Square D I-Line switchboards and panelboards.
• Worldwide certifications — UL, CSA, VDE, IEC, CE, CCC — suitable for export projects and global OEM applications.
• Visual trip indication — toggle handle moves to the tripped (mid-position) on overcurrent, providing clear fault status.
• Durable molded-case construction — long mechanical and electrical life for demanding industrial environments.

Typical Applications

• Main circuit protection and feeders in low-voltage switchboards and motor control centers (MCCs)
• Commercial and industrial building power distribution
• I-Line panelboards and switchboards
• Motor branch-circuit short-circuit and ground-fault protection (when coordinated with proper overload relays)
• Data centers, manufacturing plants, water/wastewater, oil & gas, and commercial facilities
• Generator, UPS, and transformer secondary main protection

Notes / Considerations

• 80% rated device: continuous load should not exceed 80 A for general use; 100% rating requires a separately listed 100%-rated installation / enclosure.
• Verify available fault current at the installation point does not exceed the breaker's interrupting rating (25 kA at 480/600 V).
• This is an I-Line version — it only mates with Square D I-Line busways/centers; it cannot be bolt-mounted like the JL/L-frame lug versions.
• Always install within a certified enclosure; the breaker itself is open-type (IP00).
• Observe line/load orientation on I-Line units; torque all bus connections to the manufacturer's listed values.
• For motor protection, the thermal-magnetic trip must be coordinated with the motor starter overload relay — do not rely on the breaker alone for running-overload protection.
• Padlock hasp supports LOTO; use only with padlocks and tags rated for industrial lockout.
• Replace only with the same or UL-listed equivalent rating; do not upsize frame without re-evaluating busbar and short-circuit coordination.