GENERAC RTSN400J3 RTSN400J3 - ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,762.00
GENERAC RTSN400J3 RTSN400J3 - 400 Amp Transfer Switch 120/240 3Ø NEMA 3R CUL

GENERAC RTSN400J3 RTSN400J3 - 400 Amp Transfer Switch 120/240 3Ø NEMA 3R CUL

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Model: RTSN400J3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,762.00
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RTSN400J3 - 400 Amp Transfer Switch 120/240 3Ø NEMA 3R CUL

  • Features

    • The Heavy Duty Generac Contactor is a cUL recognized device, designed for years of service
    • Designed for use with three-phase generators 60-kw and below
    • Digital Power Technology (DPM) allows these switches to have the capability to manage up to 4 individual HVAC (24 VAC controlled) loads with no additional hardware
    • Three-phase, 120/240-volt; cUL listed
    • RTSN400J3
    • Generac Automatic Transfer Switches are housed in an aluminum NEMA/UL Type 3R enclosure, with electrostatically applied and baked powder paint
    • When used in tandem with Smart Management Modules, up to 8 loads can be managed as well, providing the most installation efficient power management options available

  • Certifications and Standards

    • UL Listed

Manufacturer Resources

Product Specs

Amperage:
400 A
Assembled Weight:
130 lbs
Color Finish:
Grey
Country Of Origin:
United States
Installation Hardware Included:
transfer switch
Installation Instructions Included:
Yes
Manufacturer Warranty:
5 year limited
Maximum Generator Input:
48000 W
Overall Depth:
17 in
Overall Height:
52 in
Overall Width:
25 in
Restrictions:
No
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Transfer Switch
Product Voltage:
120 V
Product Material:
Aluminum
Product Weight:
130 lbs

Generac RTSN400J3 – Frequently Asked Questions

1) Will the Generac RTSN400J3 work with a single-phase generator?
No. The RTSN400J3 is a three-phase, 120/240-volt switch built for use with three-phase generators 60 kW and below. If your set is single-phase, this is the wrong switch and you need a single-phase RTS model instead.
2) Can the Generac RTSN400J3 transfer switch be mounted outdoors?
Yes. It comes in an aluminum NEMA/UL Type 3R enclosure with electrostatically applied, baked powder paint, which is a rainproof outdoor rating. Finish is grey.
3) How much wall space do I need for a 400 amp Generac RTSN400J3 transfer switch?
Plan on 52 inches high by 25 inches wide with 17 inches of depth off the wall. At 130 lbs it is a two-person set, and the mounting surface needs to carry that load plus the conductors landing in it.
4) What size generator can the RTSN400J3 handle?
The switch is rated 400 amps with a maximum generator input of 48,000 watts, and Generac specifies it for three-phase generators 60 kW and below. Size the feeder and overcurrent protection to the 400 amp rating, not to the generator.
5) Can this Generac transfer switch shed air conditioning loads without extra hardware?
Yes. Digital Power Management is built in, so the switch controls up to four individual 24 VAC controlled HVAC loads with no additional hardware. Add Smart Management Modules and total managed loads go to eight.
6) Is the Generac RTSN400J3 listed for commercial work?
It is UL Listed, and the heavy duty Generac contactor inside is a cUL recognized device. The enclosure is a NEMA/UL Type 3R.
7) What is the exact part number to order this 400 amp three-phase Generac switch?
Generac model and MPN RTSN400J3. The J3 designation is the three-phase 120/240-volt, 400 amp NEMA 3R configuration. Country of origin is the United States.
8) Does the Generac RTSN400J3 come with installation instructions and mounting hardware?
It ships as a complete transfer switch with installation hardware and printed installation instructions included. Conductors, lugs sizing to your feeder, conduit and the generator control wiring are the installer's responsibility.
How fast can I get the Generac RTSN400J3 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Generac RTSN400J3 come with a warranty?
Absolutely. The Generac RTSN400J3 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Generac RTSN400J3?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Generac RTSN400J3 from ZenSupply?
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