Zinsco Q243090 Circuit Breaker, 90A, 3-Pole, 240V

The Zinsco Q243090 is a rugged three-pole circuit breaker engineered for industrial electrical service, maintenance, and replacement projects. With a 90 A rating and a 240 V operating range, this unit powers demanding three-phase loads while protecting downstream equipment from overloads and faults. It’s part of the Case Breaker Q series, a family designed to work within Zinsco panels that support this form factor. To ensure a proper fit, verify compatibility using the part number Q243090 and your specific application requirements.

Key advantages

• Three-pole design for three‑phase systems: Provides balanced protection across all conductors in industrial configurations.
• 90 A, 240 V specification: Suits heavy machinery, motors, compressors, and other high-demand equipment common in manufacturing and processing environments.
• Case Breaker Q series compatibility: Designed to integrate with Zinsco Q-series panels, enabling straightforward replacement in compatible electrical rooms.
• Part-number clarity: The Q243090 designation helps you confirm exact fit for your panel and circuit requirements—minimal guesswork during procurement.

Ideal use cases

• Upgrading or replacing aging breakers in industrial switchgear and distribution panels.
• Protecting three-phase motors and heavy equipment in manufacturing facilities, process plants, and HVAC systems.
• Maintenance projects where compatibility with existing Q-series panels is essential to avoid mismatched components.

Specifications at a glance

• Amperage: 90 A
• Poles: 3
• Voltage: 240 V
• Series: Case Breaker Q
• Manufacturer: Zinsco
• Part Number: Q243090

Compatibility & installation notes

Notes: Verify fit by part number and application requirements. If you need help matching a part number or confirming compatibility, message us and we’ll assist in identifying the right solution for your panel configuration and load needs.

In short, the Zinsco Q243090 90A 3-pole 240V circuit breaker is a purpose-built choice for industrial environments where reliable protection, precise fit, and compatibility with the Case Breaker Q series matter most. Use it for safe, compliant, and predictable operation of your three-phase electric systems.