Square D 994320 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Quantity
Square D 994320 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial and industrial power systems, the 994320 is a 3-pole, 20A molded case circuit breaker from Square D's 99 Series. This bolt-on breaker mounts into Square D ML panelboards. It serves as a reliable component for power distribution and can substitute for the ML23020 SKU. Delivering a 10 kAIC interrupt rating at 480VAC, it features fixed thermal and magnetic trip functions (LI) to safeguard circuits from overcurrents and short circuits.Specifications
| Brand | Square D |
|---|---|
| Part Number | 994320-R |
| Series | 99 Series |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 480VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D ML Panelboards |
| Wire Gauge | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| 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, NEMA AB-1 |
| Approval | UL, CSA |
| Temp Rating | 40°C |
Product FAQs
4 answersWhich panelboards accept the Square D 994320 circuit breaker?
This breaker is specifically designed to bolt into legacy Square D ML panelboards. It serves as a direct replacement component for maintaining older commercial and industrial electrical distribution systems.
What type of wiring is permitted for the 994320 terminal lugs?
The load-side lugs are dual-rated for both copper and aluminum conductors. They accept 14 to 10 AWG copper wire or 12 to 10 AWG aluminum wire. Ensure proper torque is applied during installation to prevent terminal overheating.
Can the trip settings on the 994320 be adjusted in the field?
No. The thermal-magnetic trip unit features fixed long-time and instantaneous (LI) functions. These protection parameters are factory-calibrated and cannot be modified by the user.
Is the 994320 breaker part of a current product line?
The 994320 belongs to the legacy 99 Series frame group. While the original ML panelboards are no longer manufactured, these breakers are used to support and maintain existing infrastructure without requiring a full panel upgrade.
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