Square D 997316 Molded Case Circuit Breaker
- 150A
- 3 Pole
- Bolt-On
Quantity
Square D 997316 - 150A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial electrical systems, the 997316 is a 150A molded case circuit breaker from Square D. It provides robust protection using proven thermal-magnetic trip technology. This bolt-on MCCB fits into Square D Type ML panelboards. It serves as an exact replacement for older ML series breakers, helping maintain existing infrastructure. Rated for 600VAC, the unit delivers a 10kA interrupting capacity. The ML-3 frame construction ensures compliance with UL 489 standards.Specifications
| Brand | Square D |
|---|---|
| Part Number | 997316-R |
| Series | 99 Series |
| Amperage | 150A |
| 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 answersWhich panelboards are compatible with the Square D 997316 circuit breaker?
This bolt-on breaker is designed specifically for installation in legacy Square D Type ML panelboards.
Can the 997316 be used to replace older ML-3 frame breakers?
Yes, this 99 Series breaker serves as a direct replacement for aging or discontinued ML-3 frame circuit breakers within existing Square D ML panelboards.
What wire sizes and materials do the lugs on the 997316 accept?
The load-side lugs are rated for both aluminum and copper conductors, accepting wire gauges from 4 AWG up to 300 kcmil.
Are the thermal and magnetic trip settings adjustable on the 997316?
No, this breaker features a fixed thermal-magnetic trip unit. The long-time and instantaneous trip thresholds are factory set and cannot be modified in the field.
What type of protection does the LI trip function provide on the 997316?
The LI designation indicates that the thermal-magnetic trip unit provides both Long-Time protection against sustained overloads and Instantaneous protection against short circuits.
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