Square D 999230 Molded Case Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
Quantity
Square D 999230 - 30A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to support aging infrastructure, this 30A molded case circuit breaker delivers dependable thermal-magnetic trip functions for commercial applications. It serves as an exact bolt-on replacement for vintage Square D ML panelboards and can substitute for the ML13030 SKU. Rated for 600VAC with a 10kAIC interrupting capacity, the unit features a 2-pole configuration housed within a 3-pole frame to ensure proper fitment in classic power distribution systems.Specifications
| Brand | Square D |
|---|---|
| Part Number | 999230-R |
| Series | 99 Series |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 600VAC |
| 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL, CSA |
| Temp Rating | 40°C |
Product FAQs
5 answersWhat legacy circuit breaker does the Square D 999230 replace?
This unit serves as a direct bolt-on replacement for vintage Square D ML panelboards and can substitute for the legacy ML13030 catalog number.
Why is this 2-pole breaker housed in a 3-pole frame?
The 999230 utilizes a 2-pole configuration built into a 3-pole frame to ensure proper physical fitment and bus alignment when installed in classic Square D ML power distribution systems.
Can I use aluminum wiring with the 999230 circuit breaker?
Yes, the factory lugs are rated for both copper and aluminum conductors. They accept 12 to 10 AWG aluminum wire or 14 to 10 AWG copper wire.
Are the thermal and magnetic trip settings adjustable on this breaker?
No, the 999230 features fixed thermal and fixed magnetic trip settings. It provides standard Long-Time and Instantaneous (LI) protection without field adjustability.
How does the 999230 mount into the panelboard?
This is a bolt-on circuit breaker designed exclusively for legacy Square D ML panelboards. It fastens directly to the panel bus rather than snapping into place, providing a secure connection for commercial applications.
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