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Square D 999250 Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Square D
999250
Molded Case Circuit Breaker
Brand
Square D
SKU
999250
Quantity
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Square D 999250 - 50A 2 Pole Molded Case Circuit Breaker
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50A 2 Pole Molded Case Circuit Breaker
50A 2 Pole Molded Case Circuit Breaker
50A 2 Pole Molded Case Circuit Breaker
Description
Part of the legacy 999 series, this 50A molded case circuit breaker provides essential overcurrent protection for industrial facilities. It utilizes a unique design that places a 2-pole mechanism inside a 3-pole housing. This bolt-on breaker installs into Square D ML panelboards and compatible motor control centers. It features standard lug terminals for secure wire connections. Rated for 10kA at 600VAC, it includes fixed thermal and magnetic trip functions to defend against overloads.Specifications
| Brand | Square D |
|---|---|
| Part Number | 999250-R |
| Series | 999 |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 1 |
| 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 |
| Standards | UL 489, CSA C22.2 No. 5 |
|---|---|
| Approval | UL, CSA |
| Temp Rating | 40°C |
| Construction Features | 2-Pole in 3-Pole Housing |
Product FAQs
3 answersCan the 999250 be installed in modern Square D I-Line or NQOD panels?
No, this breaker is specifically designed for legacy Square D ML panelboards and compatible Motor Control Centers. It utilizes a specific bolt-on mounting configuration that will not fit modern I-Line or NQOD panelboards.
Why does the product description mention three poles for a two-pole breaker?
The 999250 is part of the legacy 999 series, which utilizes a unique design that places a 2-pole mechanism inside a 3-pole housing to properly align with specific legacy panelboard bus configurations.
Is the Square D 999250 still actively manufactured?
No, the 999250 is a legacy breaker from the 999 series and is no longer in active production by Schneider Electric. It is typically sourced as a replacement component for maintaining existing ML-frame setups.
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