FEATURES
• Wide range of trip and non-trip currents:
From 47 mA up to 1 A for the non-trip current
• Small ratio between trip and non-trip currents
(It/Int = 1.5 at 25 °C)
• High maximum inrush current (up to 13 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:
• Telecommunications
• 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.

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 still
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 grey 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.