Square D HDA260451 Molded Case Circuit Breaker
- 45A
- 2 Pole
- I-Line
Square D
HDA260451
Molded Case Circuit Breaker
Brand
Square D
SKU
HDA260451
Quantity
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Square D HDA260451 - 45A 2 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial environments, the Square D HDA260451 functions as a 2-pole, 45A molded case circuit breaker. As part of the PowerPacT H-Frame series, it utilizes thermal-magnetic trip technology to deliver dependable long-time and instantaneous (LI) protection. Designed for seamless integration, it mounts into Square D I-Line panelboards and switchboards. This specific model features an AB phase connection and acts as a direct replacement for the legacy FA26045AB breaker.Specifications
| Brand | Square D |
|---|---|
| Series | HDA |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 20kA @ 250VDC |
| Frame Type | HDA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, Switchboards |
| Wire Gauge | 14 AWG - 3/0 AWG (Al/Cu) |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits, Terminal Shields |
|---|---|
| Accessories | Phase Connection AB |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UKCA, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Visual Trip Indicator, Reverse Feed, Non-Interchangeable Trip, 80% Rated, Phase Connection AB |
Product FAQs
7 answersWhat type of panelboards accept the HDA260451 breaker?
This breaker features an I-Line style plug-on connection, making it compatible with Square D I-Line panelboards and switchboards.
What does the letter D in the HDA260451 catalog number signify?
The letter D indicates the interrupting capacity rating. For this PowerPacT H-frame breaker, the D rating provides 14kA at 600VAC, 18kA at 480VAC, and 25kA at 240VAC.
How is the HDA260451 mounted in a panel?
It uses an I-Line bracket mounting system. The line side features plug-on jaws that connect directly to the panelboard bus, while the load side uses mechanical lugs for wire termination.
What type of lugs are included on the load side of this breaker?
The load side is equipped with standard AL150HD mechanical lugs, which accept 14 AWG to 3/0 AWG aluminum or copper wire.
What is the difference between the HDA260451 and HGA260451 breakers?
The difference is the interrupting rating. The HDA has a D rating (14kA at 600VAC), while the HGA has a higher G rating (18kA at 600VAC, 35kA at 480VAC, 65kA at 240VAC). Both share the same physical dimensions and mounting style.
Can the HDA260451 I-Line breaker be reverse fed?
No. Because it is an I-Line breaker with plug-on jaws on the line side and lugs on the load side, it cannot be reverse fed. Only unit-mount H-frame breakers with lugs on both ends are suitable for reverse feeding.
Can the HDA260451 replace an older F-frame circuit breaker?
Yes, the PowerPacT H-frame series is the modern replacement for legacy Square D F-frame breakers. The HDA260451 can be used to replace an obsolete FA26045 45A, 2-pole I-Line breaker, though the physical dimensions differ slightly.
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