Square D 9999SB12 Circuit Breaker, 200A, 3-Pole

Engineered for demanding industrial electrical service, the Square D 9999SB12 circuit breaker delivers dependable overcurrent protection in a robust 3-pole, 200 A package. Designed for maintenance, replacement, and upgrade projects, this part-number-specific unit makes compatibility simple—use the part number 9999SB12 to confirm fit with your application and panel requirements.

• Three-pole, 200 A protection safeguards 3-phase circuits across demanding industrial environments—ideal for manufacturing lines, heavy equipment, and process controls.
• Part-number-specific fit ensures you’re selecting the exact replacement for Square D installations; verify compatibility by cross-checking 9999SB12 with your panel and system specs.
• Industrial-grade durability built to withstand the rigors of on-site maintenance and frequent servicing in tough environments.
• Streamlined maintenance path supports preventive maintenance programs, reducing downtime during routine replacements and service events.

Ideal use cases

Choose the 9999SB12 for industrial service panels, retrofit projects, and replacement programs where 3-phase, 200 A protection is required. It’s well-suited for facilities with high-demand loads, such as manufacturing lines, material handling systems, and continuous-process equipment, where quick, reliable breaker performance is essential.

Compatibility and fit guidance

1. Confirm the system is three-phase and requires 200 A protection.
2. Verify that your panel or enclosure accepts 3-pole breakers of the required rating.
3. Cross-check the part number 9999SB12 to ensure exact form factor and electrical characteristics for your application.
4. If you’re unsure about compatibility, our team can assist with part-number matching and application requirements—message us and we’ll help.

With the Square D 9999SB12, you’re choosing a purpose-built solution for industrial protection that’s designed to integrate cleanly into existing Square D installations, helping you maintain safe, reliable operation across your electrical infrastructure.