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Square D 999316 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Square D
999316
Molded Case Circuit Breaker
Brand
Square D
SKU
999316
Quantity
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Square D 999316 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial applications, the Square D 999316 provides essential overcurrent protection for aging electrical systems. This 100A, 3-pole molded case circuit breaker features a rugged bolt-on design for secure connections. It mounts into obsolete Square D ML panelboards and compatible motor control centers. As a direct replacement, it helps maintain existing infrastructure without a complete system upgrade.Specifications
| Brand | Square D |
|---|---|
| Part Number | 999316-R |
| Series | 999 |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D ML Panelboards, Square D Motor Control Centers |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Accessories | Load Side Lugs Included |
|---|---|
| Standards | UL 489 |
| Approval | UL |
| Temp Rating | 40°C |
| Construction Features | Type ML-1, Obsolete/Legacy |
Product FAQs
5 answersWhich enclosures and panels accept the Square D 999316 circuit breaker?
This breaker is specifically designed to mount into legacy Square D ML panelboards and compatible Square D motor control centers. It serves as a direct replacement to help maintain older electrical infrastructure without requiring a complete panel upgrade.
How are the line and load connections configured on the 999316?
The line side features a bolt-on connection for secure mounting directly to the panelboard bus, while the load side utilizes standard mechanical lugs for terminating the phase conductors.
Are the trip settings adjustable on the 999316 breaker?
No, this breaker is equipped with a thermal-magnetic trip unit that has fixed thermal and fixed magnetic settings. It provides standard long-time and instantaneous (LI) protection without the need for field calibration.
Is the Square D 999316 an active or legacy product?
The 999316 is an obsolete, legacy ML-1 type circuit breaker. It is no longer in active production by Schneider Electric but is sourced to support and maintain existing commercial electrical systems.
What type of overcurrent protection does the 999316 provide?
This breaker delivers reliable thermal-magnetic protection against overloads and short circuits in commercial 3-phase systems. The fixed long-time and instantaneous trip functions ensure safe operation for aging electrical infrastructure.
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