Square D QMB3640 QMB Saflex Unit Series 4, 400 Amps 600V

Upgrade your electrical system with the Square D QMB-3640 QMB Saflex Unit Series 4, designed for optimal performance in high-demand environments. This robust unit features a maximum rating of 400 amps at 600 volts, ensuring reliable power distribution for commercial and industrial applications.

Key Features:

• High Capacity: Supports up to 400 Amps, ideal for heavy-duty power requirements.
• Voltage Rating: Operates at a maximum of 600V, perfect for a variety of electrical systems.
• Durable Construction: Built with quality materials to withstand harsh conditions, ensuring longevity and reliability.
• Series 4 Design: Advanced engineering for improved efficiency and safety.
• Versatile Applications: Suitable for industrial, commercial, and residential use, including substation installations.
• Easy Installation: User-friendly design for straightforward setup and integration into existing systems.
• Safety Features: Equipped with protective measures to minimize electrical hazards and enhance user safety.

Why Choose the Square D QMB-3640?

The Square D QMB-3640 is not just a product; it’s a commitment to quality and reliability. With its advanced features and proven performance, this unit is the ideal choice for professionals looking to ensure safe and efficient power distribution.

We ship orders Monday through Friday, excluding holidays. Most in-stock items are processed and shipped within 1–2 business days. Once your order ships, you’ll receive tracking information via email.

Standard Shipping: 2–5 business days (carrier: USPS, UPS, or FedEx depending on item size and destination)

Expedited Shipping: Available upon request. Contact us before ordering.

Freight Shipping: Larger or palletized orders may ship via LTL freight. We’ll contact you directly for delivery coordination.

Shipping Rates:
Shipping costs are calculated at checkout based on weight, dimensions, and destination. For bulk orders or local pickups, please contact us for custom shipping options.

New Products are covered by a 90 Day Warranty. Used Products are sold as is.

   Returns are accepted within 30 days of delivery.
    •    Items (new or used) must be in the same condition as received and include original packaging when possible.
    •    A receipt or proof of purchase is required.
    •    Buyer is responsible for return shipping unless the item is defective or not as described.

 A 20% restocking fee applies to all returns not due to defects or listing errors (e.g., ordered by mistake, no longer needed).
    •    This fee will be deducted from the refund total.