MT ThermoFuse™ Varistors

TDK MT ThermoFuse™ Varistors are equipped with monitor outputs and integrated thermal protective components for overvoltage protection. These specially developed quadratic disk varistors are connected in series with a patented thermal protective component design. In the case of a persistent overvoltage and heating of the TDK varistor, the fuse is activated and separates the varistor from the circuit with a high level of reliability. This prevents potential damage to the PCB or the components installed in the varistor’s vicinity.

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Qty. RoHS ECAD Model Series
Product
Mounting Style
Termination Style
Voltage Rating AC
Voltage Rating DC
Varistor Voltage
Clamping Voltage
Diameter
Max Surge Current
Surge Energy Rating
Capacitance
Minimum Operating Temperature
Maximum Operating Temperature
Packaging
TDK Varistors 550VAC 10% 25mm SuperioR
Datasheet
845In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 550 VAC 745 VDC 910 V 1.5 kV 27.5 mm 20 kA 780 J 860 pF - 40 C + 105 C Bulk
TDK Varistors 130VAC 10% 20mm 3-pin ThermoFuse
Datasheet
590In Stock
Min.: 1
Mult.: 1

Thermo-fused Varistor 3-pin, AdvanceD 20mm MOVs PCB Mount Radial 130 VAC 170 VDC 205 V 340 V 23 mm 10 kA 100 J 1.85 nF - 40 C + 85 C Bulk
TDK Varistors 230VAC 10% 25mm SuperioR
Datasheet
345In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 230 VAC 300 VDC 360 V 595 V 27.5 mm 20 kA 315 J 2.25 nF - 40 C + 105 C Bulk
TDK Varistors 300VAC 10% 25mm SuperioR
Datasheet
404In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 300 VAC 385 VDC 470 V 775 V 27.5 mm 20 kA 410 J 1.75 nF - 40 C + 105 C Bulk
TDK Varistors 250VAC 10% 25mm SuperioR
Datasheet
724In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 250 VAC 320 VDC 390 V 650 V 27.5 mm 20 kA 345 J 2.1 nF - 40 C + 105 C Bulk
TDK Varistors 385VAC 10% 25mm SuperioR
Datasheet
815In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 385 VAC 505 VDC 620 V 1.025 kV 27.5 mm 20 kA 600 J 1.25 nF - 40 C + 105 C Bulk
TDK Varistors 420VAC 10% 25mm SuperioR
Datasheet
619In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 420 VAC 560 VDC 680 V 1.12 kV 27.5 mm 20 kA 700 J 1.15 nF - 40 C + 105 C Bulk
TDK Varistors 460VAC 10% 25mm SuperioR
Datasheet
1,080In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 460 VAC 615 VDC 750 V 1.24 kV 27.5 mm 20 kA 720 J 1.05 nF - 40 C + 105 C Bulk
TDK Varistors Leaded Disk Varistor 710pF, 680VAC, 895VDC
Datasheet
741In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 680 VAC 895 VDC 1.1 kV 1.815 kV 27.5 mm 20 kA 940 J 710 pF - 40 C + 105 C Bulk
TDK Varistors 275VAC 10% 20mm 3-pin ThermoFuse
Datasheet
620In Stock
Min.: 1
Mult.: 1

Thermo-fused Varistor 3-pin, AdvanceD 20mm MOVs PCB Mount Radial 275 VAC 350 VDC 430 V 710 V 9.5 mm 10 kA 215 J 850 pF - 40 C + 85 C Bulk
TDK Varistors 440VAC 10% 25mm SuperioR
Datasheet
185In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 440 VAC 585 VDC 715 V 1.18 kV 27.5 mm 20 kA 710 J 1.1 nF - 40 C + 105 C Bulk
TDK Varistors 510VAC 10% 25mm SuperioR
Datasheet
239In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 510 VAC 670 VDC 820 V 1.355 kV 27.5 mm 20 kA 750 J 950 pF - 40 C + 105 C Bulk
TDK Varistors 580VAC 10% 25mm SuperioR
Datasheet
260In Stock
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 580 VAC 780 VDC 940 V 1.58 kV 27.5 mm 20 kA 800 J 830 pF - 40 C + 105 C Bulk
TDK Varistors 275VAC 10% 25mm SuperioR
Datasheet
2,400Expected 08/10/2026
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 275 VAC 350 VDC 430 V 710 V 25 mm 20 kA 375 J 1.32 nF - 40 C + 105 C Bulk

TDK Varistors 320VAC 10% 25mm SuperioR
Datasheet
2,390Expected 08/10/2026
Min.: 1
Mult.: 1

Disc Varistor, SuperioR 25mm MOVs PCB Mount Radial 320 VAC 420 VDC 510 V 840 V 27.5 mm 20 kA 445 J 1.6 nF - 40 C + 105 C Bulk
TDK Varistors 20mm,130Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,140Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,150Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,175Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,210Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,250Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,275Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 20mm,300Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk
TDK Varistors 320VAC 10% 20mm 3-pin ThermoFuse
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 1
Mult.: 1

Thermo-fused Varistor 3-pin, AdvanceD 20mm MOVs PCB Mount Radial 320 VAC 420 VDC 510 V 840 V 23 mm 10 kA 273 J 720 pF - 40 C + 85 C Bulk
TDK Varistors 20mm,320Vac ,thermo-fused type,3pin
Datasheet
Non-Stocked Lead-Time 22 Weeks
Min.: 750
Mult.: 750

Thermo-fused Varistor 3-pin, AdvanceD 20mm Bulk