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Square D HJA36045 Molded Case Circuit Breaker
- 45A
- 3 Pole
- I-Line
Square D
HJA36045
Molded Case Circuit Breaker
Brand
Square D
SKU
HJA36045
Quantity
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Square D HJA36045 - 45A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D HJA36045 - 45A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | HJA36045 |
| Series | HJA |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | H |
|---|---|
| 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 | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, 80% Rated |
Quantity
Square D HJA36045 - 45A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | HJA36045 |
| Series | HJA |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | H |
|---|---|
| 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 | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, 80% Rated |
Similar Items
40A 3 Pole Molded Case Circuit Breaker
35A 3 Pole Molded Case Circuit Breaker
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Description
Designed for heavy-duty commercial systems, the Square D HJA36045 is a 3-pole, 45A PowerPacT H-Frame MCCB. It provides long-time and instantaneous (LI) protection. This 80% rated breaker mounts into standard I-Line panelboards. It serves as an ideal upgrade for legacy FA36045, FC36045, and FH36045 models. Featuring a 65kAIC rating at 480VAC, the current-limiting MCCB utilizes fixed thermal and fixed magnetic trip settings. It fully supports reverse feed applications.Specifications
| Brand | Square D |
|---|---|
| Part Number | HJA36045 |
| Series | HJA |
| Amperage | 45A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | H |
|---|---|
| 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 | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, 80% Rated |
Product FAQs
8 answersWhat enclosures or panelboards are compatible with the HJA36045?
This breaker is engineered exclusively for Square D I-Line panelboards and switchboards. Its plug-on jaw design is not compatible with standard NEMA enclosures or standard DIN rail mounting.
How does the HJA36045 connect to the panelboard bus?
As an I-Line breaker, the line side uses plug-on jaws that clamp directly onto the panelboard's vertical bus stack. The load side utilizes standard mechanical lugs for outbound wire connections.
Can the HJA36045 be used for direct current circuits?
Yes, in addition to its AC ratings, this breaker is certified for up to 250VDC with a 20kA interrupting capacity. This allows it to protect certain industrial DC control circuits or battery systems.
What does the letter J signify in the HJA36045 part number?
Within the PowerPacT H-Frame nomenclature, the letter J indicates the specific interrupting capacity tier. It delivers a maximum interrupting rating of 100kA at 240VAC and 65kA at 480VAC.
Does this thermal magnetic breaker offer adjustable trip settings?
No, this specific model is equipped with fixed thermal and fixed magnetic trip elements. If your application requires adjustable long-time or short-time settings, you would need a breaker equipped with a Micrologic electronic trip unit instead.
What are the instantaneous magnetic trip parameters for the HJA36045?
The fixed magnetic trip unit on this 45A breaker features a hold current rating of 400A and an instantaneous trip current of 850A.
Are internal accessories interchangeable with other PowerPacT frames?
Yes, many internal accessories, such as shunt trips and auxiliary switches, are designed to be universally compatible across PowerPacT H, J, and L frame molded case circuit breakers.
What precautions should be taken when installing the HJA36045 onto an I-Line bus?
Always ensure the panelboard is completely de-energized before installation. The plug-on jaws must be seated fully onto the bus stack, and the breaker must be securely fastened to the mounting pan to maintain safe electrical and mechanical contact.
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Reviews
Review summary
Customers rate this product 4.7 out of 5 based on 15 reviews.
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Rating
15 reviews
- RFRon F.Verified BuyerReviewingSquare D HJA36050 - 50A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/26Square D HJA36050 review
The delivery was on and exactly what I ordered as usual. I highly recommend Super Breakers!
- CMChris M.Verified BuyerReviewingSquare D HJA36080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/23/26Quick delivery
Everything arrived correctly and on time.
- HEHeineken E.Verified BuyerReviewingSquare D HJA36150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars2/9/26Quick Delivery
Good condition Quick Delivery
- JBJosh B.Verified BuyerReviewingSquare D HJA36060 - 60A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/30/26Quick Shipping
Breaker showed up quickly and as described.
- JCJoe C.Verified BuyerReviewingSquare D HJA36035 - 35A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars7/29/25HJA
Shipped fast