Verified
Solid quality component. Exactly as described on the product page.
Maintenance team · Ontario
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Circuit Breaker
Zinsco | Q243040 | Circuit Breaker | 40A | 3-Pole | 240V
| Amperes | 40 |
| Poles | 3 |
| Voltage | 240 |
| Product Type | Circuit Breaker |
Regular price
$510.00
Sale price
$510.00
Regular price
Unit price
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Seamless online shopping experience guaranteed with easy shipping and returns policy.
Shop with Confidence: Our Products come with a Reliable Year-Long Warranty.
Zinsco | Q243040 | Circuit Breaker | 40A | 3-Pole | 240V
Regular price
$510.00
Sale price
$510.00
Regular price
Unit price
Product description
Shipping
Meet the Zinsco Q243040 circuit breaker—a purpose-built, 40-amp, 3-pole device engineered for reliable overcurrent protection in 240V systems. Designed with retrofit, maintenance, and replacement projects in mind, this breaker delivers the exact specifications you need when compatibility matters as much as protection.
- Amperage: 40A
- Poles: 3-Pole
- Voltage: 240V
- Part reference: Q243040
Why the 3-pole, 240V configuration matters for your system
A 3-pole design with a 240-volt rating is essential for safeguarding circuits that use three conductors or require a common trip across all poles. This configuration is common in multi-wire branch circuits and equipment that demands synchronized shutdown, reducing the risk of backfeed and ensuring safer, more predictable protection in demanding installations.
Core value and use cases
- Replacement in existing panels where Q243040 is the specified part, preserving original trip characteristics and mounting interfaces.
- Retrofit projects that require a precise 40A, 3-pole, 240V solution to match the electrical design and safety standards of your setup.
- Maintenance scenarios where exact part numbers streamline ordering, installation time, and panel labeling accuracy.
Fitment and installation guidance
- Always confirm fit and ratings before ordering—the part number Q243040 is the most reliable reference for compatibility with your panel or equipment.
- Power down the system and inspect the mounting cradle and bus connections prior to replacement to ensure a secure, proper connection.
- Consult your panel manufacturer’s documentation to verify mounting interface and trip characteristics align with this Zinsco breaker.
What you gain with the Zinsco Q243040
Consistent, predictable protection for 240V circuits with a dedicated 40A capacity, delivered through a robust 3-pole design. This helps you maintain electrical safety, minimize downtime, and keep your electrical distribution running smoothly during both upgrades and routine maintenance.
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What Our Customers Say
General feedback we often hear from customers purchasing industrial electrical parts.
Verified
Packaging was secure and the item arrived clean and ready for installation.
Electrical contractor · GTA
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We’ve used this type on multiple jobs and it’s been reliable so far.
Panel shop · Canada/US
