TMOV Thermally Protected Varistors

Littelfuse TMOV Thermally Protected Varistors are radially leaded metal oxide varistors (MOVs) with a thermally activated element designed to open during overheating. The integrated thermal element and the enclosure design work together to facilitate surge-protection module compliance to UL1449. These performance capabilities of Littelfuse TMOV varistors serve cord or permanently connected applications. These Littelfuse varistors offer quick thermal response due to the proximity of the thermal element to the MOV body. This integrated configuration provides the added benefit of lower inductance than most discrete solutions.

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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
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
2,291In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 460 VAC 610 VDC 825 V 1.24 kV 20 mm 10 kA 360 J 200 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
2,040In Stock
Min.: 1
Mult.: 1
: 300

TMOV MOVs PCB Mount Radial 460 VAC 610 VDC 825 V 1.24 kV 20 mm 10 kA 360 J 200 pF - 55 C + 85 C Reel, Cut Tape
Littelfuse Varistors 320V 20kASQ 25MM PB FREE 25S
Datasheet
549In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 320 VAC 420 VDC 561 V 825 V 25 mm 20 kA 490 J 1.08 nF - 55 C + 85 C Bulk
Littelfuse Varistors 320V 20KA SQ 25MM 25S ROHS/PB FREE
Datasheet
785In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 320 VAC 420 VDC 561 V 825 V 25 mm 20 kA 390 J 1.08 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
862In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 130 VAC 170 VDC 225.5 V 340 V 14 mm 6 kA 50 J 1 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
2In Stock
1,800On Order
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 175 VAC 225 VDC 297 V 455 V 14 mm 6 kA 70 J 700 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
454In Stock
4,500On Order
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 275 VAC 350 VDC 473 V 710 V 14 mm 6 kA 110 J 450 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
1,211In Stock
2,400Expected 28/10/2026
Min.: 1
Mult.: 1
: 400

TMOV MOVs PCB Mount Radial 300 VAC 470 VDC 517 V 775 V 14 mm 6 kA 125 J 400 pF - 55 C + 85 C Reel, Cut Tape
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
1,060In Stock
Min.: 1
Mult.: 1
: 400

TMOV MOVs PCB Mount Radial 320 VAC 510 VDC 561 V 840 V 14 mm 6 kA 136 J 380 pF - 55 C + 85 C Reel, Cut Tape
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
1,185In Stock
Min.: 1
Mult.: 1
: 400

TMOV MOVs PCB Mount Radial 385 VAC 620 VDC 682 V 1.025 kV 14 mm 6 kA 150 J 360 pF - 55 C + 85 C Reel, Cut Tape
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 14MM
Datasheet
1,090In Stock
1,500Expected 01/10/2026
Min.: 1
Mult.: 1
TMOV MOVs PCB Mount Radial 510 VAC 670 VDC 902 V 1.355 kV 14 mm 6 kA 185 J 200 pF - 55 C + 85 C Bulk
Littelfuse Varistors Thermally Protected 14MM
Datasheet
444In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 550 VAC 715 VDC 1.001 kV 1.355 kV 14 mm 6 kA 190 J 180 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
Product Comments
32In Stock
1,200Expected 21/10/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 130 VAC 170 VDC 225.5 V 340 V 20 mm 10 kA 100 J 1.9 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
568In Stock
1,200Expected 19/10/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 175 VAC 225 VDC 297 V 455 V 20 mm 10 kA 135 J 1.4 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
898In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 230 VAC 360 VDC 396 V 595 V 20 mm 10 kA 160 J 1.1 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
897In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 250 VAC 320 VDC 429 V 650 V 20 mm 10 kA 170 J 1 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
1,072In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 320 VAC 561 VDC 561 V 840 V 20 mm 10 kA 372 J 750 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
996In Stock
Min.: 1
Mult.: 1
: 300

TMOV MOVs PCB Mount Radial 320 VAC 510 VDC 561 V 840 V 20 mm 10 kA 372 J 750 pF - 55 C + 85 C Reel, Cut Tape
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
74In Stock
2,100Expected 01/12/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 420 VAC 560 VDC 748 V 1.12 kV 20 mm 10 kA 320 J 600 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
685In Stock
1,200Expected 24/12/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 550 VAC 715 VDC 1.001 kV 1.5 kV 20 mm 10 kA 360 J 300 pF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 20MM
Datasheet
5In Stock
1,200Expected 21/01/2027
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 625 VAC 1.1 kVDC 1.1 kV 1.65 kV 20 mm 10 kA 400 J 250 pF - 55 C + 85 C Bulk
Littelfuse Varistors 115V 20KA SQ 25MM PB FREE 25S
Datasheet
116In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 125 VAC 150 VDC 198 V 295 V 25 mm 20 kA 170 J 3.2 nF - 55 C + 85 C Bulk
Littelfuse Varistors 150V 20KA SQ 25MM 25S ROHS / LEAD FREE
Datasheet
45In Stock
900Expected 16/11/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 150 VAC 200 VDC 216 V 390 V 25 mm 20 kA 220 J 2.3 nF - 55 C + 85 C Bulk
Littelfuse Varistors 275V 20KA SQ 25MM PB FREE 25S
Datasheet
212In Stock
800Expected 15/09/2026
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 275 VAC 350 VDC 387 V 700 V 25 mm 20 kA 350 J 1.25 nF - 55 C + 85 C Bulk
Littelfuse Varistors THERMALLY PROTECTED VARISTOR 34 MM DISC
Datasheet
1In Stock
Min.: 1
Mult.: 1

TMOV MOVs PCB Mount Radial 275 VAC 369 VDC 473 V 730 V 34 mm 40 kA 550 J 4.5 nF - 55 C + 85 C Bulk