Types of Circuit Protection

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TDK 0201 ULC TVS Diodes
TDK 0201 ULC TVS Diodes
08-12-2025
0201 size with 0.15mm height, bidirectional ESD protection of high-speed I/O line per IEC 61000-4-2.
TDK S30 & S36 NTC ICL Thermistors
TDK S30 & S36 NTC ICL Thermistors
04-21-2025
NTC inrush current limiters with a UL 94V-0 flame-retardant coating material.
TDK G14 & G20 G-Series GDT Varistors
TDK G14 & G20 G-Series GDT Varistors
04-10-2025
Features a hybrid design with low leakage and rated disk diameters of 14mm and 20mm.
TDK Immersion NTC Thermistor
TDK Immersion NTC Thermistor
01-02-2025
Features a fully sealed system for immersion applications and a lightweight design.
TDK B725x Multilayer Varistors
TDK B725x Multilayer Varistors
12-13-2024
AEC-Q200 compliant and offer reliable ESD protection up to 30kV per IEC 61000-4-2 standards.
TDK L862 and L871 NTC Thermistors
TDK L862 and L871 NTC Thermistors
10-07-2024
Designed for temperature measurement and are AEC-Q200 automotive grade.
TDK HV PTC Heater Kit
TDK HV PTC Heater Kit
07-24-2024
Contains four different series of parts with a temperature range of -40°C to +195°C.
TDK PTC Heater Kit
TDK PTC Heater Kit
06-05-2024
Features heating elements for low-voltage applications & contains 3 separate series of thermistors.
TDK NTCGS Chip NTC Thermistors
TDK NTCGS Chip NTC Thermistors
03-06-2024
AEC-Q200 qualified, 10KΩ resistance value and comes in three case sizes: 0201, 0402, and 0603.
TDK NTCWS Thermistors
TDK NTCWS Thermistors
09-07-2023
Features a compact package that achieves high accuracy and reliability at high temperatures.
TDK B7221xM SIOV Metal Oxide Varistors
TDK B7221xM SIOV Metal Oxide Varistors
05-31-2023
AEC-Q200 qualified varistors suitable for Surface Mount Device (SMD) assembly.
TDK J404 Inrush Current Limiter
TDK J404 Inrush Current Limiter
02-20-2023
Designed for DC voltages of up to 500V and AC voltages of up to 350V
TDK T850 NTC Thermistors
TDK T850 NTC Thermistors
11-18-2022
Designed for surface temperature measurement, offers 10kΩ rated resistance with 1% or 2% tolerance.
TDK HP100 NTC Thermistors
TDK HP100 NTC Thermistors
09-27-2022
Feature humidity resistance, high-temperature resistance up to 150°C, and high sensor accuracy.
TDK S14, S10, & S07 SIOV Metal Oxide Leaded Varistors
TDK S14, S10, & S07 SIOV Metal Oxide Leaded Varistors
07-05-2022
Ideal for communication systems, household appliances, power supplies, consumer & power metering. 
TDK S10 SIOV Metal Oxide Leaded Varistors
TDK S10 SIOV Metal Oxide Leaded Varistors
05-25-2022
Small ø10mm disk, high-performance varistors with a wide 130VRMS to 680VRMS operating voltage range.
TDK S07 SIOV Metal Oxide Leaded Varistors
TDK S07 SIOV Metal Oxide Leaded Varistors
05-25-2022
Small ø7mm disk, high-performance varistors with a wide 115VRMS to 460VRMS operating voltage range.
TDK S14 SIOV Metal Oxide Leaded Varistors
TDK S14 SIOV Metal Oxide Leaded Varistors
05-25-2022
Small ø14mm disk, high-performance varistors with a wide 130VRMS to 625VRMS operating voltage range.
TDK B57861 NTC Thermistors for Temperature Measurement
TDK B57861 NTC Thermistors for Temperature Measurement
04-19-2022
Provides a short response time and a temperature curve from -40°C to +155°C.
TDK NTC Thermistor Sensor Kit for Industrial Use
TDK NTC Thermistor Sensor Kit for Industrial Use
03-25-2022
Features a variety of products designed for temperature measurement in industrial applications.
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PolyPhaser 2GHz to 6GHz N-Type Bulkhead RF Surge Protectors
PolyPhaser 2GHz to 6GHz N-Type Bulkhead RF Surge Protectors
01-22-2026
Protect equipment from EMP or power surges commonly caused by lightning or electrical disturbances.
PolyPhaser IX Series Data Line Surge Protectors
PolyPhaser IX Series Data Line Surge Protectors
01-22-2026
Protects equipment from EMP or surges in power caused by lightning and other induced transients.
PolyPhaser GX Coaxial RF Surge Protectors
PolyPhaser GX Coaxial RF Surge Protectors
01-22-2026
Designed for RF coaxial applications requiring DC current on the coaxial line.
PolyPhaser IXG-05 Lightning Surge Protector
PolyPhaser IXG-05 Lightning Surge Protector
01-22-2026
Protects equipment from EMP or surges in power caused by lightning and other induced transients.
PolyPhaser 125MHz to 1GHz Type-N Coaxial RF Surge Protectors
PolyPhaser 125MHz to 1GHz Type-N Coaxial RF Surge Protectors
01-22-2026
Help protect equipment from EMP, power surges, or other strong electrical disturbances.
PolyPhaser IS-B50 Coaxial RF Surge Protectors
PolyPhaser IS-B50 Coaxial RF Surge Protectors
01-22-2026
Designed to protect against lightning events and are ideal for HF, UHF, and VHF radios.
PolyPhaser 400MHz to 2.5GHz RF Coaxial Surge Protectors
PolyPhaser 400MHz to 2.5GHz RF Coaxial Surge Protectors
01-22-2026
Protect equipment from EMP or power surges caused by lightning or electrical disturbances. 
PolyPhaser 4MHz to 900MHz & 5MHz to 400MHz Surge Protectors
PolyPhaser 4MHz to 900MHz & 5MHz to 400MHz Surge Protectors
01-22-2026
Protect equipment from EMP or power surges caused by lightning or strong electrical disturbances.
PolyPhaser 6GHz to 10GHz Type N F/F RF Surge Protector
PolyPhaser 6GHz to 10GHz Type N F/F RF Surge Protector
01-22-2026
Patented spiral inductor design that delivers near-instantaneous surge response to lightning surges.
PolyPhaser 40MHz to 400MHz Coaxial RF Surge Protectors
PolyPhaser 40MHz to 400MHz Coaxial RF Surge Protectors
01-22-2026
Protect equipment from EMP or power surges caused by lightning or other strong electrical changes.
PolyPhaser IX-2M Lightning Surge Protectors
PolyPhaser IX-2M Lightning Surge Protectors
01-22-2026
Protect equipment from EMP or power surges caused by lightning and other induced transients.
PolyPhaser TSX HT RF EMP Surge Protectors
PolyPhaser TSX HT RF EMP Surge Protectors
01-22-2026
HEMP tested to protect a wide range of 2.7GHz WiFi® and cellular power configurations.
PolyPhaser TSX & TUSX Bulkhead Coaxial RF Surge Protectors
PolyPhaser TSX & TUSX Bulkhead Coaxial RF Surge Protectors
01-22-2026
Manufactured with a coaxial in-line design, offering a wide operating frequency range.
PolyPhaser Surge Protector Accessories
PolyPhaser Surge Protector Accessories
01-22-2026
Provide the necessary accessories to complete the grounding installation.
Vishay NTCASCW78A NTC Immersion Temperature Sensor
Vishay NTCASCW78A NTC Immersion Temperature Sensor
01-20-2026
Designed for accurate thermal monitoring in demanding environments.
Bourns SE Breakers (Thermal Cut-Off Devices)
Bourns SE Breakers (Thermal Cut-Off Devices)
01-19-2026
TCO devices that control abnormal, excessive current virtually instantaneously up to rated limits.
Littelfuse SM15KPA-HRA & SM30KPA-HRA High Reliability Diodes
Littelfuse SM15KPA-HRA & SM30KPA-HRA High Reliability Diodes
01-13-2026
Protects I/O interfaces, VCC bus, and other circuits in avionics, aviation, and eVTOL applications.
Eaton 14DE High Breaking Capacity Semiconductor Fuses
Eaton 14DE High Breaking Capacity Semiconductor Fuses
01-13-2026
Features a 20kA high breaking capacity for high-energy applications.
KYOCERA AVX AMTS Motor Transient Suppressor Varistors
KYOCERA AVX AMTS Motor Transient Suppressor Varistors
01-12-2026
Offer transient voltage protection and EMI/RFI suppression for electric motor circuits.
Calian TW170 Coaxial GNSS RF Surge Protectors
Calian TW170 Coaxial GNSS RF Surge Protectors
01-09-2026
Professional-grade coaxial GNSS full-band surge protectors or lightning arrestors.
Littelfuse SP432x-01WTG TVS Diodes
Littelfuse SP432x-01WTG TVS Diodes
01-08-2026
Provide ultra-low capacitance, bidirectional, and a high level of protection.
Schurter APO 1000V Pyro Fuse
Schurter APO 1000V Pyro Fuse
01-02-2026
Safety device engineered for high-voltage DC applications with high reliability and safety.
Bourns GDT25H High Voltage Gas Discharge Tube Arrestors
Bourns GDT25H High Voltage Gas Discharge Tube Arrestors
12-26-2025
Features a surface-mount design and is built with advanced computer simulation techniques.
PolyPhaser DC to 7GHz RF Coaxial Surge Protectors
PolyPhaser DC to 7GHz RF Coaxial Surge Protectors
12-23-2025
Protect against EMP, High Altitude Electro-Magnetic Pulse (HEMP), or power surges.
PolyPhaser 650MHz to 2.7GHz RF Coaxial Surge Protectors
PolyPhaser 650MHz to 2.7GHz RF Coaxial Surge Protectors
12-23-2025
Protect against EMP, High Altitude Electro-Magnetic Pulse (HEMP), or power surges.
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