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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP460E Littelfuse 1: £1.62 2,261In Stock	Mfr. Part No. TMOV20RP460E Mouser Part No 576-TMOV20RP460E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	2,261In Stock	£1.62 £1.20 £1.10 £0.995 £0.978	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP460EL2T7 Littelfuse 1: £1.94 2,040In Stock	Mfr. Part No. TMOV20RP460EL2T7 Mouser Part No 576-TMOV20RP460EL2T7	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	2,040In Stock	Cut Tape £1.94 £1.44 £1.32 £1.19 Reel £0.995	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
Varistors 320V 20kASQ 25MM PB FREE 25S TMOV25SP320E Littelfuse 1: £3.96 549In Stock	Mfr. Part No. TMOV25SP320E Mouser Part No 576-TMOV25SP320E	Littelfuse	Varistors 320V 20kASQ 25MM PB FREE 25S Learn More about Littelfuse smov varistor	Datasheet	549In Stock	£3.96 £2.81 £2.63	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
Varistors 320V 20KA SQ 25MM 25S ROHS/PB FREE TMOV25SP320M Littelfuse 1: £3.96 785In Stock	Mfr. Part No. TMOV25SP320M Mouser Part No 576-TMOV25SP320M	Littelfuse	Varistors 320V 20KA SQ 25MM 25S ROHS/PB FREE Learn More about Littelfuse smov varistor	Datasheet	785In Stock	£3.96 £2.81 £2.63	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
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP130E Littelfuse 1: £1.38 532In Stock	Mfr. Part No. TMOV14RP130E Mouser Part No 576-TMOV14RP130E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	532In Stock	£1.38 £1.09	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
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP300EL2T7 Littelfuse 1: £1.75 1,211In Stock 2,400On Order	Mfr. Part No. TMOV14RP300EL2T7 Mouser Part No 576-TMOV14RP300EL2T7	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	1,211In Stock 2,400On Order On Order Ship Dates Mfr. No: TMOV14RP300EL2T7 Stock: 1,211 Can Dispatch Immediately On Order: 800 Expected 08/10/2026 1,600 Expected 13/10/2026 Factory Lead Time: 16 Weeks	Cut Tape £1.75 £1.30 £1.19 £1.06 £0.826 Reel £0.826	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
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP320EL2T7 Littelfuse 1: £1.65 1,060In Stock	Mfr. Part No. TMOV14RP320EL2T7 Mouser Part No 576-TMOV14RP320EL2T7	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	1,060In Stock	Cut Tape £1.65 £1.22 £1.12 £0.995 Reel £0.882 View £0.89 £0.856 £0.826	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
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP385E Littelfuse 1: £1.71 454In Stock 1,500Expected 07/12/2026	Mfr. Part No. TMOV14RP385E Mouser Part No 576-TMOV14RP385E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	454In Stock 1,500Expected 07/12/2026	£1.71 £1.27 £1.15 £1.03 View £0.978 £0.841	Min.: 1 Mult.: 1	TMOV	MOVs	PCB Mount	Radial	385 VAC	505 VDC	682 V	1.025 kV	14 mm	6 kA	150 J	360 pF	- 55 C	+ 85 C	Bulk
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP385EL2T7 Littelfuse 1: £1.70 785In Stock	Mfr. Part No. TMOV14RP385EL2T7 Mouser Part No 576-TMOV14RP385EL2T7	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	785In Stock	Cut Tape £1.70 £1.26 £1.15 £0.969 Reel £0.925 View £0.871 £0.856	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
Varistors THERMALLY PROTECTED VARISTOR 14MM TMOV14RP510E Littelfuse 1: £1.55 1,090In Stock 1,500Expected 26/10/2026	Mfr. Part No. TMOV14RP510E Mouser Part No 576-TMOV14RP510E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 14MM Learn More about Littelfuse tmov varistors	Datasheet	1,090In Stock 1,500Expected 26/10/2026	£1.55 £1.15 £1.05 £0.943 View £0.89 £0.871	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
Varistors Thermally Protected 14MM TMOV14RP550E Littelfuse 1: £1.61 344In Stock	Mfr. Part No. TMOV14RP550E Mouser Part No 576-TMOV14RP550E	Littelfuse	Varistors Thermally Protected 14MM Learn More about Littelfuse tmov varistors	Datasheet	344In Stock	£1.61 £1.20 £1.09 £0.978 £0.96	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP130E Littelfuse 1: £1.68 32In Stock 1,200Expected 04/11/2026	Mfr. Part No. TMOV20RP130E Mouser Part No 576-TMOV20RP130E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	32In Stock 1,200Expected 04/11/2026	£1.68 £1.25 £1.14 £1.02 £0.943	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP175E Littelfuse 1: £1.58 543In Stock 1,200Expected 02/02/2027	Mfr. Part No. TMOV20RP175E Mouser Part No 576-TMOV20RP175E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	543In Stock 1,200Expected 02/02/2027	£1.58 £1.18 £1.07 £0.96 £0.943	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP230E Littelfuse 1: £1.58 898In Stock	Mfr. Part No. TMOV20RP230E Mouser Part No 576-TMOV20RP230E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	898In Stock	£1.58 £1.18 £1.07 £0.96 £0.943	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP250E Littelfuse 1: £1.58 897In Stock	Mfr. Part No. TMOV20RP250E Mouser Part No 576-TMOV20RP250E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	897In Stock	£1.58 £1.18 £1.07 £0.96 £0.943	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP320E Littelfuse 1: £1.58 627In Stock	Mfr. Part No. TMOV20RP320E Mouser Part No 576-TMOV20RP320E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	627In Stock	£1.58 £1.41 £1.27 £1.13 View £1.07 £0.986 £0.943	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP320EL2T7 Littelfuse 1: £1.89 996In Stock	Mfr. Part No. TMOV20RP320EL2T7 Mouser Part No 576-TMOV20RP320EL2T7	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	996In Stock	Cut Tape £1.89 £1.41 £1.28 £1.15 Reel £0.96	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP385E Littelfuse 1: £1.62 859In Stock 1,500Expected 28/12/2026	Mfr. Part No. TMOV20RP385E Mouser Part No 576-TMOV20RP385E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	859In Stock 1,500Expected 28/12/2026	£1.62 £1.20 £1.10 £0.995 £0.978	Min.: 1 Mult.: 1	TMOV	MOVs	PCB Mount	Radial	385 VAC	505 VDC	682 V	1.025 kV	20 mm	10 kA	300 J	700 pF	- 55 C	+ 85 C	Bulk
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP420E Littelfuse 1: £1.72 74In Stock 2,100Expected 16/02/2027	Mfr. Part No. TMOV20RP420E Mouser Part No 576-TMOV20RP420E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	74In Stock 2,100Expected 16/02/2027	£1.72 £1.54 £1.41 £1.05 View £0.986 £0.978	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP550E Littelfuse 1: £2.06 685In Stock 1,200Expected 28/12/2026	Mfr. Part No. TMOV20RP550E Mouser Part No 576-TMOV20RP550E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	685In Stock 1,200Expected 28/12/2026	£2.06 £1.53 £1.41 £1.20 View £1.15 £1.13 £1.03	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
Varistors THERMALLY PROTECTED VARISTOR 20MM TMOV20RP625E Littelfuse 1: £1.96 5In Stock 1,200Expected 28/12/2026	Mfr. Part No. TMOV20RP625E Mouser Part No 576-TMOV20RP625E	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 20MM Learn More about Littelfuse tmov varistors	Datasheet	5In Stock 1,200Expected 28/12/2026	£1.96 £1.46 £1.34 £1.27 £1.20	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
Varistors 115V 20KA SQ 25MM PB FREE 25S TMOV25SP115M Littelfuse 1: £3.57 116In Stock	Mfr. Part No. TMOV25SP115M Mouser Part No 576-TMOV25SP115M	Littelfuse	Varistors 115V 20KA SQ 25MM PB FREE 25S Learn More about Littelfuse smov varistor	Datasheet	116In Stock	£3.57 £2.51 £2.33	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
Varistors 140V 20KA SQ 25MM PB FREE 25S TMOV25SP140M Littelfuse 1: £3.59 28In Stock 800Expected 15/02/2027	Mfr. Part No. TMOV25SP140M Mouser Part No 576-TMOV25SP140M	Littelfuse	Varistors 140V 20KA SQ 25MM PB FREE 25S Learn More about Littelfuse smov varistor	Datasheet	28In Stock 800Expected 15/02/2027	£3.59 £2.53 £2.35	Min.: 1 Mult.: 1	TMOV	MOVs	PCB Mount	Radial	140 VAC	180 VDC	242 V	355 V	25 mm	20 kA	210 J	2.5 nF	- 55 C	+ 85 C	Bulk
Varistors 150V 20KA SQ 25MM 25S ROHS / LEAD FREE TMOV25SP150M Littelfuse 1: £3.61 45In Stock 900Expected 09/12/2026	Mfr. Part No. TMOV25SP150M Mouser Part No 576-TMOV25SP150M	Littelfuse	Varistors 150V 20KA SQ 25MM 25S ROHS / LEAD FREE Learn More about Littelfuse smov varistor	Datasheet	45In Stock 900Expected 09/12/2026	£3.61 £2.54 £2.36	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
Varistors THERMALLY PROTECTED VARISTOR 34 MM DISC TMOV34S271EP Littelfuse 1: £16.44 1In Stock	Mfr. Part No. TMOV34S271EP Mouser Part No 576-TMOV34S271EP	Littelfuse	Varistors THERMALLY PROTECTED VARISTOR 34 MM DISC Learn More about Littelfuse tmov varistors	Datasheet	1In Stock	£16.44 £12.60 £12.00 £11.93	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