Multiquip ATS-53944 Automatic Transfer Switch 120/240VAC 1-Phase 400A 2-Pole UL NEMA3R

The Multiquip ATS-53944 is a genuine OEM Automatic Transfer Switch 120/240VAC 1-Phase 400A 2-Pole UL NEMA3R designed for NEMA3R-rated generator and power distribution applications. This is a direct OEM replacement sourced through Multiquip's authorized parts supply chain, ensuring correct electrical ratings and enclosure classification. The ATS-53944 carries UL listing and a NEMA3R outdoor-rated enclosure, making it a code-compliant solution for protected exterior installations. Confirm ATS-53944 against your unit's parts manual before ordering to ensure a correct application match.

Key Features

• OEM-Rated Electrical Specifications — Rated at 120/240VAC single-phase, 400A, 2-pole — exact output and load ratings matched to Multiquip-approved transfer switch requirements, not a generic substitution.
• UL-Listed for Code Compliance — Carries Underwriters Laboratories (UL) certification, supporting compliance with electrical installation codes and inspection requirements for transfer switch installations.
• NEMA3R Enclosure Rating — Built with a NEMA3R outdoor-rated enclosure that resists rain, sleet, and external ice formation, suitable for protected exterior mounting on jobsite power distribution systems.
• Direct OEM Replacement — Supplied as a genuine Multiquip OEM component under part number ATS-53944, matching the original unit's terminal layout and mounting configuration for a straightforward swap.
• Critical Power Continuity Function — A correctly functioning automatic transfer switch ensures uninterrupted switchover between utility and generator power; a failed or incorrectly rated ATS can result in unsafe back-feed conditions or complete loss of protected loads.

An automatic transfer switch (ATS) monitors incoming utility power and automatically switches connected loads to a generator source when utility power is lost — then switches back once utility power is restored. The 400A, 2-pole, single-phase configuration of the ATS-53944 defines the maximum current capacity and circuit arrangement the switch can safely manage, making correct rating matching essential. A failed or undersized transfer switch can result in overheating, tripped protection devices, or unsafe back-feed voltage reaching utility lines, so replacing it with the correct OEM-rated unit is critical to safe and compliant operation.

For questions about fitment or to confirm this part is correct for your application, contact the DHS Equipment parts team directly.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.