PowerMax PMTS-50

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DISCONTINUED: PowerMax PMTS-50, 240/120 VAC 30A automatic transfer relay

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SKU: PMX-111-108 Category: Tags: ,

PowerMax’s PMTS-50 is an 120/240 VAC split-phase, 30 Amp automatic transfer switch. When plugged into shore power or a generator it will automatically provide AC power from that source to all AC appliances. To operate your appliances from an on-board generator, simply start the generator and the PMTS-50 will (after 20-30 seconds) automatically transfer to the generator to power the AC appliances. The time delay allows the generator voltage to stabilize.

The PMTS-50 can be mounted in any position. It is best to install the PMTS-50 as close to the generator and shore power cord entrance as possible in order to minimize Voltage drop across the wire.

Note: The PowerMax spec sheet claims 50 Amp for this transfer switch. However, based on the relay/contactor inside we believe 30 Amp should be the safe/proper rating.


  • An economical automatic transfer switch choice!
  • 120/240 Volt split-phase compatible
  • 30 Amp split-phase transfer capability, 60 Amp when L1 and L2 are connected together (single-phase)
  • Time delay, so a generator can stabilize before switching
  • Complies with FCC norms
  • 2 year warranty
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Weight 6 lbs
Dimensions 8 × 8 × 8 in

Mnfr. model

AC Voltage


Max. current







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