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FEATURES

? Wide range of trip and non-trip currents:

From 94 mA up to 2 A for the trip current

? Small ratio between trip and non-trip currents

(It/Int = 1.5 at 25 °C)

? High maximum overload current (up to 23 A)

? Leaded parts withstand mechanical stresses

and vibration

? UL file E148885 according to XGPU standard UL1434

? Material categorization: for definitions of compliance

please see www.vishay.com/doc?99912

APPLICATIONS

Overload (current, voltage, temperature) protection in:

? Industrial electronics

? Consumer electronics

? Electronic data processing

DESCRIPTION

These directly heated ceramic-based thermistors have a

positive temperature coefficient and are primarily intended

for overload protection. They consist of a ceramic pellet

soldered between two tinned CCS wires and coated with a

UL 94 V-0 high temperature hard silicone lacquer.

Bare metalized pellets are available on request.

MOUNTING

PTC thermistors can be mounted by wave, reflow, or

hand-soldering. Current levels have been determined

according IEC 60738 conditions. Different ways of

mounting or connecting the thermistors can influence their

thermal and electrical behavior. Standard operation is in air,

any potting or encapsulation of PTC thermistors is not

recommended and will change its operating characteristics.

Typical Soldering

235 °C; duration: 5 s (lead (Pb)-bearing)

245 °C, duration: 5 s (lead (Pb)-free)

Resistance to Soldering Heat

260 °C, duration: 10 s max.

MARKING

Only the gray lacquered thermistors with a diameter of

8.5 mm to 20.5 mm are marked with BC, R25 value

(example 1R9) on one side and Int, Vmax. on the other side.