Square D HJA36100U43X Molded Case Circuit Breaker
- 100A
- 3 Pole
- I-Line
Square D
HJA36100U43X
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA36100U43X
Quantity
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Square D HJA36100U43X - 100A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial power distribution, the Square D HJA36100U43X is a 100A, 3-pole electronic trip molded case circuit breaker. It belongs to the PowerPact H-Frame family, offering advanced microprocessor-based sensing. This breaker mounts into Square D I-Line panelboards and switchboards. The plug-on I-Line connection ensures rapid, secure installation. Rated at 65kAIC at 480VAC, it features a Micrologic 5.2A trip unit with adjustable LSI protection and an integrated ammeter.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA36100U43X |
| Series | HJA |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 40-100A |
|---|
| Frame Type | HJA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 14 AWG-3/0 AWG |
| Max Wire | 3/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LSI |
| Trip Function | Long-Time, Short-Time, Instantaneous |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Communication Module, Motor Operator |
|---|---|
| Accessories | Micrologic 5.2A Trip Unit |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CCC, CE, CSA, HACR, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, 80% Rated, Reverse Feed, True RMS Sensing |
Product FAQs
7 answersWhat type of panelboards is the HJA36100U43X compatible with?
This breaker is designed exclusively for use in Square D I-Line panelboards and switchboards. It features an I-Line style plug-in connection and cannot be installed in standard QO or Homeline load centers.
What does the U43X suffix indicate on this circuit breaker?
The U43X suffix signifies that the breaker is equipped with a Micrologic 5.2A electronic trip unit. This provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) protection, as well as an integrated ammeter for local current monitoring.
What wire sizes are accepted by the load-side lugs on the HJA36100U43X?
The load-side mechanical lugs accept copper or aluminum wire ranging from 14 AWG to 3/0 AWG. The line side utilizes an I-Line plug-in connection directly to the panelboard bus.
Can the HJA36100U43X replace older Square D breakers?
Yes, the PowerPacT H-frame series is the modern replacement for legacy Square D F-frame breakers, such as the FA, FH, and FC series. It occupies the same mounting space in I-Line panelboards, allowing for a straightforward retrofit without modifying the bus.
What phase connection does the HJA36100U43X use?
This breaker features an ABC phase connection. Its I-Line jaws are configured to connect to all three phases (A, B, and C) on the panelboard bus.
Is the HJA36100U43X rated for 100% continuous current?
No, this is a standard 80% rated circuit breaker. For continuous loads lasting three hours or more, the circuit should be sized so the load does not exceed 80 Amps, which is 80% of its 100A rating.
Does this breaker include a push-to-trip feature?
Yes, PowerPacT H-frame breakers include an integral push-to-trip button on the cover. This allows you to manually trip the breaker to verify the mechanical operation of the tripping mechanism.
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