Sensata Technologies has developed the electrical self-hold temperature cut-out in order to offer a non-self-resetting device suitable for high current applications, thus fulfilling the growing need for higher safety.

One ceramic pin has a layer of resistive material, functioning as a small heater when a voltage is supplied.

The operating principle of the TH series simple and effective. A current flows through the resistive Klixon bimetal disc. When a fault condition occurs, the increased ambient temperature causes the bimetal disc to snap open the contacts. The resistive layer spots the voltage over the open contacts and a current flows through the resistor, generating sufficient heat to keep the contacts open. When the power is switched off, the device cools down to a safe temperature and the contacts will close.

CSA

LR31809-61

Rating 13 (2) A250 / 10,000

ENEC

2014531.14

Rating 16 (2) A250 / 1,000

UL

E54813

Rating 13 (2) A250 / 30,000

 

Standard Operating Temperature Range

60°C to 150°C

60°C to 130°C

Tolerance on Open Temperature

± 5K

± 5K

Maximum Ambient Temperature

200°C

200°C

Self-hold Function in Still Air

> -20°C

> -35°C

Voltage maintained thermal cut–out

Incorporated, non–electric

IP00

For internal conductors only

Riveting, soldering, spot welding, spring loaded contacting

200°C

PTI 250

By various means in conjunction with (holes in) terminals, such that adequate creepage and clearance distances are maintained between live parts and accessible metal parts

For continuous operation

Type 2C

Voltage maintained off-position through heat from the heater film on one ceramic pin. Device resets by interrupting the power supply

Whole control

Normal