Square D 997319 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Quantity
Square D 997319 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial applications, the 997319 is a 175A, 3-pole molded case breaker from Square D. It delivers reliable protection for older electrical infrastructure. This bolt-on breaker is engineered to mount securely into Square D Type ML panelboards. It provides an exact fit for facilities replacing discontinued ML Series components, including the ML3175. With a 10kAIC rating at 600VAC, it features fixed thermal and magnetic trip units for long-time and instantaneous defense.Specifications
| Brand | Square D |
|---|---|
| Part Number | 997319-R |
| Series | 99 Series |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Type ML Panelboards |
| Wire Gauge | 4 AWG-300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 4 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 |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL, CSA |
| Temp Rating | 40°C |
| Construction Features | Type 997, ML-3 Frame |
Product FAQs
5 answersWhat panelboards are compatible with the Square D 997319 circuit breaker?
The 997319 is designed specifically for installation in legacy Square D Type ML panelboards. These were commonly used in industrial power applications prior to the introduction of the I-Line panelboard family.
Can the 997319 replace older ML Series breakers?
Yes, this 99 Series breaker serves as a direct drop-in replacement for discontinued ML Series components, including the ML3175 catalog number. This allows facilities to maintain older electrical infrastructure without requiring a full panel upgrade.
What frame type is the Square D 997319?
This 175A breaker is built on the legacy ML-3 frame, which is also referred to as the 997 type within the obsolete Square D 99 Series family.
What type of connections does the 997319 require for installation?
This breaker utilizes a bolt-on mounting configuration to secure directly to the ML panelboard bus. It includes load-side lugs that accept 4 AWG to 300 kcmil aluminum or copper conductors.
Is the trip unit on the 997319 adjustable?
No, this thermal-magnetic breaker features fixed long-time and fixed instantaneous (LI) trip functions. The overcurrent and short-circuit response settings cannot be adjusted in the field.
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