Electronic Alliance

www.eaa.net.au

PTC SERIES SPECIFICATION

Common Glossary:

Rate Zero-power Resistance (Rn):DC resistance value of the thermistor measured under 25℃ by adopting

sufficiently low power consumption.

Maximum Operating Voltage (Vmax) The maximum rated voltage the PTC thermistor can continuously

endure at 25℃.

Maximum Inrush Current (Imax) The maximum current (effective value) through the PTC thermistor under

max.rated voltage. Exceeding this current may result in damage to the PTC components.

Reference Temperature (Tsw) The temperature at which the resistance value of the PTC thermistor increases

to twice Rmin, also called Curie temperature.

Non-trip Current (Int) Rated current or holding current, at maximum operating temperature, this is the

maximum current value that doesn’t trip the PTC to the high resistance state. Under these conditions, PTC

performs as a fixed resistor.

Trip Current (It) The minimum current value that will cause the PTC to trip to the protective high resistance

state.

Operating Temperature Range The ambient temperature range in which PTC can be used when the maximum

voltage is applied. Range is -10℃to+60℃.

Temperature Coefficient of Resistance(aT) The Temperature coefficient is calculated from the linear range at

the steepest portion of resistance (Tb-Tp) as illustrated in Fig.1. aT=(InRp-InRb)˙100/(Tp-Tb) (%/℃)

Dissipation Factor (δ) The ratio power dissipation change to temperature change of PTC thermistor(in mw/

℃). δ=p/(T-Tr)

Where P=dissipation power

T=thermistor body temperature

Tr=room temperature

1/9

http://www.Datasheet4U.com/