SMD2920 Datasheet, PDF (2/8 Pages) List of Unclassifed Manufacturers – Surface Mount PTC Devices

TM
SMD2920 Surface Mount PTC Devices R.O.C. Patent#415624
How to Select a Polymer PTC fuse:
(1) Determine the following operating parameters for the circuits:
(A) Normal Operating Current (I hold)
(B) Maximum Circuit Voltage (V max)
(C) Maximum Interrupt Current (I max)
(D) Normal Operating Temperature (min /max )
(2) Select the device form factor and dimension suitable for the application:
Surface Mount Device (SMD Series)
Radial Leaded Device (RLD Series)
Axial Leaded Strap Device (STD Series)
Other Custom-designed Device (Disc/Chip)
(3) Compare the maximum ratings for V max and I max of the PTC device with
the circuit in application and make sure that the circuit’s requirement does
not exceed the device ratings.
(4) Check that the PTC device’s trip time (time-to-trip) will protect the circuit.
(5) Verify that the circuit operating temperatures are within the PTC device’s
normal operating temperature range.
(6) Verify the performance and suitability of the chosen PTC device in the
application.
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