Zinsco | Q243070 | Circuit Breaker | 70A | 3-Pole | 240V | 10kA | Plug-In

Zinsco Q243070 70A 3-Pole 240V Plug-In Circuit Breaker is a purpose-built solution for maintenance, retrofit, and replacement in compatible Zinsco electrical panels. Designed to slot into existing bus stabs with a plug-in architecture, this breaker helps you restore reliable protection quickly when a component wears out or a panel upgrade is needed.

• Amperage: 70 A
• Poles: 3-Pole (three-phase protection)
• Voltage: 240 V
• Interrupting Capacity: 10 kA IC (kiloampere interrupting capacity)
• Style: Plug-In design for straightforward installation in compatible Zinsco panels

Who should consider this breaker? electrical professionals and facilities managers performing panel retrofits, replacements, or routine maintenance on legacy Zinsco systems. If your project involves a 3-phase 240 V circuit that requires dependable shutoff across all three poles, this unit provides the protection and compatibility you need without complicated mounting or wiring changes.

• Use cases:
  • Replacing a failed or worn breaker in a compatible Zinsco panel
  • Retrofits where a 70 A, 3-pole, 240 V protection is required for a 3-phase load
  • Maintenance cycles to restore panel reliability and safety margins
• Why the 10 kAIC rating matters: higher fault current protection reduces the risk of arc energy damage during a surge or short circuit, helping safeguard wiring and connected equipment.

Important compatibility notes: always confirm fit and ratings before ordering. The part number Q243070 is your best reference for ensuring the breaker matches your panel’s specifications and bus interface. If you’re ever unsure, compare the Q243070 reference against your panel labeling and service documentation to avoid compatibility issues.

Practical tips for installation and operation: - Before replacement, power down the panel and verify the circuit isn’t energized. - Inspect the panel’s bus stabs and mounting area for wear; replace any damaged components during retrofit. - Keep a record of the part number (Q243070) and the panel model to streamline future maintenance or replacements.