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TRC 50 Amp Automatic Transfer Switch

Catalog Item # 67274
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This model is a basic automatic transfer switch.
Automatically transfers RV to generator power 30 seconds after generator start-up to ensure generator output voltage is stable before powering appliances and accessories. Once the generator shuts down, it transfers to shore power after a 3-4 second delay when you are connected to a shore power pedestal. Mechanical interlocking contactors prevent contact damage during high current transfer operations.


  • 120/240 volt, 50 amp, 60 hz
  • ETL listed
  • Full transfer switch rating, UL1008
  • Contactor rating 50 amp
  • Generator dominant
  • Mechanical interlocking contactors

  • Technical Specs

    Tech Specs

    Weight: 11.4 lbs.

    Dimensions: 13.5"H x 9.5"W x 6"D

    Manufacturer: Technology Research Corp

    Mfg Part #: 40100

    Tech Notes: Electrical Rating: 120/240V, 50A
    Contactor Rating: 50A, FLA
    Time Delay at Power Up (Shore 3-4 Sec, Gen 30 Sec.): Yes
    Third Party Listed: Yes
    Generator Dominant: Yes
    Mechanical Interlocking Contactors: Yes

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    TRC 50 Amp Automatic Transfer Switch: Customer Reviews

    Camper's Choice Rating

    (5 Based on 1 Review)

    Heavy wire (1)
    Solid casing (1)
    Little room for connecting wires (1)

    Reviewed by 1 customers


    Very happy with product

    0 out of 0 people found this review helpful.
    December 30, 2014
    Same physical size as my old one making mounting easier. Wiring connections were heavy duty and internal wiring bigger than my old switch. Contactors are heavy duty. All in all, a well built unit. I also like the generator dominate feature, which allows overriding the post power during brownouts or park low voltage without having to go outside to unplug the post especially during rain.
    Pros: Solid casing, Heavy wire
    Cons: Little room for connecting wires
    Was this review helpful? Yes / No

    Q & A

    Product Question & Answer

    2 questions : 2 answers
    Expand All
    Will this replace a model ats 50 magnetiek type 1?
    1 answer(s)
    Can this product be used on a 35 foot class a motorhome with a 5500 watt onan generator?
    1 answer(s)

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