Multiquip ATS-53913 Automatic Transfer Switch 120/240VAC 1-Phase 400A 2-Pole UL NEMA3R

The Multiquip ATS-53913 is a genuine OEM Automatic Transfer Switch rated at 120/240VAC 1-Phase, 400A, 2-Pole, UL-listed, and built for NEMA3R-rated enclosure configurations. As a direct OEM replacement, the part meets the exact electrical specifications required for safe and dependable transfer switching in Multiquip generator and power distribution applications. This switch is UL-listed and housed in a NEMA3R-rated enclosure, making it suitable for outdoor and weather-exposed installations. When you need a code-compliant, drop-in replacement, the Multiquip ATS-53913 delivers the correct ratings and connections without compromise.

Key Features

• Correct Electrical Ratings — Rated 120/240VAC, 1-Phase, 400A, ensuring the switch handles full load capacity at the specified voltage without derate or modification.
• 2-Pole Configuration — Dual-pole switching architecture provides complete line transfer for single-phase power systems, maintaining circuit integrity across both conductors during a transfer event.
• UL-Listed Compliance — Carries UL certification, confirming the switch has been independently tested to meet established safety standards for automatic transfer switching equipment.
• NEMA3R Enclosure Rating — Designed for outdoor and semi-exposed environments, the NEMA3R housing protects internal contacts and switching mechanisms from rain, sleet, and external ice formation.
• Genuine OEM Component — Sourced directly from Multiquip, the part is built to the same specification as the original, ensuring correct terminal layout and switching characteristics for NEMA3R-configured installations.

An automatic transfer switch monitors incoming utility power and automatically switches the connected load to a standby generator source when utility power is lost — then transfers back once utility power is restored. The 400A rating of the ATS-53913 determines the maximum current the switch can safely carry, making correct amperage selection critical to system protection. A failed or incorrectly rated transfer switch can result in lost power transfer capability, arc faults, or damage to connected equipment, making a like-for-like OEM replacement the safest and most reliable service option.

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.

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