Prevents burnout of a single-phase motor

Basic Characteristics

Product summary

Detects overcurrent / locked rotor current and protects a motor from burnout

Product purpose

Prevent burnout of general-purpose single-phase motors

Intended use

Submerged pump
Various general-purpose motors, and more

Operating type

Bimetal type
(Convert a current applied to the product into heat in the internal heater, which then operates the bimetal and interrupts the circuit)

Compatible standard

UL (with some exceptions)

Mechanical Characteristics

Case material

Phenolic resin
(UL 94, V-0, CTI 175 or higher)

Operating temperature range

Temperature near motor: 20°C to 100°C
No freezing or condensation allowed

Connection terminal type

Solder terminal
FASTON tab terminal (#250)

Product mounting method

Fixed in place with M4 screws or by other means
38-mm interval

Electrical Characteristics

Rated voltage

AC 125/250V

Rated capacity

Up to 2.2 kW

Contact withstand current


Contact withstand count

2,000 times or more

Withstand voltage

1500 V for 1 minute
Leakage current: 10 mA or less

Insulation resistance

50 MΩ or higher with a 500-VDC megohmmeter

Characteristics Unique to This Product

  • Set operating temperature: 100°C to 140°C
  • Set return temperature: 60°C to 70°C
  • Temperature tolerance: ±10°C