Self-Protecting PTC Thermistors

TDK Self-Protecting PTC Thermistors are suitable for smoothing capacitors in power supplies to prevent short-circuit damage. These self-protecting PTC thermistors are ideal for high pulse currents and a high number of operating cycles. Inrush current limiters are not damaged when directly connected to Vmax, even without additional current limitation. Applications for TDK Self-Protecting PTC Thermistors include inrush current limiters (charging resistors) for smoothing and DC link capacitors and for the replacement of high-power fixed resistors for capacitor charging.

Results: 14
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (EUR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Resistance
Tolerance
Mounting Style
Termination Style
Minimum Operating Temperature
Maximum Operating Temperature
Qualification
Packaging


TDK PTC (Positive Temperature Coefficient) Thermistors PTC Thermistor J 204-B 130-A 10 16X3,1 251In Stock
Min.: 1
Mult.: 1

B59204 100 Ohms 25 % - 40 C + 125 C Tray
TDK PTC (Positive Temperature Coefficient) Thermistors 560 V AC, AEC-Q200 AEC-Q200
Datasheet
7 535In Stock
Min.: 1
Mult.: 1

Surface Mount OverCurrent PTC 100 Ohms 25 % PCB Mount Radial - 40 C + 125 C AEC-Q200 Case
TDK PTC (Positive Temperature Coefficient) Thermistors 440 V AC, AEC-Q200 AEC-Q200
Datasheet
4 473In Stock
Min.: 1
Mult.: 1
Inrush Current Limiter Housing Type 56 Ohms 25 % PCB Mount Radial - 40 C + 125 C AEC-Q200 Case
TDK PTC (Positive Temperature Coefficient) Thermistors 440volts 120ohms ICL AEC-Q200
Datasheet
2 904In Stock
2 500Expected 24/08/2026
Min.: 1
Mult.: 1

Inrush Current Limiter SMD Type 120 Ohms 25 % PCB Mount Radial - 40 C + 125 C AEC-Q100 Cut Tape
TDK PTC (Positive Temperature Coefficient) Thermistors 440volts 56ohms ICL AEC-Q200
Datasheet
1 058In Stock
1 500Expected 17/06/2026
Min.: 1
Mult.: 1
: 500

B597x-Cx 56 Ohms 25 % PCB Mount Radial - 40 C + 125 C AEC-Q100 Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 280AC, 400DC,50oHMS
Datasheet
3 084In Stock
3 000Expected 14/08/2026
Min.: 1
Mult.: 1
: 500

Telecom Pair Protection Over current in Housing style 50 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 440AC,620DC,120oHMS PTC Thermistor
Datasheet
3 546In Stock
1 500Expected 27/07/2026
Min.: 1
Mult.: 1

Telecom Pair Protection Over current in Housing style 120 Ohms 25 % PCB Mount Radial - 40 C + 125 C Cut Tape
TDK PTC (Positive Temperature Coefficient) Thermistors 560vAC,800vDC, 500 Ohms
Datasheet
4 827In Stock
Min.: 1
Mult.: 1
: 500

Inrush Current Limiter Leaded Disk Type 500 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 1000AC/DC,7.5KoHMS PTC Thermistor
Datasheet
1 116In Stock
3 500Expected 17/08/2026
Min.: 1
Mult.: 1
: 500

Inrush Current Limiter Leaded Disk Type 7.5 kOhms 33 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 280AC, 400DC,25oHMS
Datasheet
709In Stock
6 000On Order
Min.: 1
Mult.: 1
: 500

B597x-Cx 25 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 280AC,400DC,80oHMS PTC Thermistor
Datasheet
524In Stock
1 000Expected 24/06/2026
Min.: 1
Mult.: 1
: 500

Inrush Current Limiter Leaded Disk Type 80 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 260AC,370DC,70oHMS PTC Thermistor
Datasheet
1 041In Stock
Min.: 1
Mult.: 1
: 1 000

Inrush Current Limiter Leaded Disk Type 70 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors 440AC,620DC,500oHMS PTC Thermistor
Datasheet
5In Stock
3 000On Order
Min.: 1
Mult.: 1
: 1 000

Inrush Current Limiter Leaded Disk Type 500 Ohms 25 % PCB Mount Radial - 40 C + 125 C Ammo Pack
TDK PTC (Positive Temperature Coefficient) Thermistors PTC Thermistor J 201-B 140-A 10 16X3 Non-Stocked Lead-Time 14 Weeks
Min.: 1
Mult.: 1

B59201 20 Ohms 30 % - 40 C + 125 C Tray