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High-Surge MELF Resistors (HSMW)

Welwyn / TT Electronics High-Surge MELF Resistors (HSMW) are engineered to deliver exceptional surge tolerance and controlled failure performance in compact, surface-mount designs. Combining wirewound construction with a robust MELF package, these resistors deliver reliable protection against high-energy transients while maintaining stable operation under continuous load. The HSMW product line from Welwyn / TT Electronics withstands fast inrush energies up to 6.5J and protects against lightning surge events up to 3.8kV (1.2/50µs). These resistors are designed for use in power conversion and mains-connected applications where reliability and safety are crucial.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CLP) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	ECAD Model	Resistance	Power Rating	Tolerance	Temperature Coefficient	Minimum Operating Temperature	Maximum Operating Temperature	Diameter	Length	Packaging
	MELF Resistors 100 OHM 5% 200PPM 1W HSMW0309-100RJT2 Welwyn Components / TT Electronics 1: $428 3.510In Stock New Product	Mfr. Part # HSMW0309-100RJT2 Mouser Part # 756-HSMW0309-100RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 100 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	3.510In Stock	Cut Tape $428 $321 $244 $143 Reel $88,9 View $117 $102 $88,9 $78 $71,4	Min.: 1 Mult.: 1 : 2.000			100 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 10 OHM 5% 200PPM 1W HSMW0309-10RJT2 Welwyn Components / TT Electronics 1: $428 3.865In Stock New Product	Mfr. Part # HSMW0309-10RJT2 Mouser Part # 756-HSMW0309-10RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 10 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	3.865In Stock	Cut Tape $428 $321 $244 $143 Reel $88,9 View $117 $102 $88,9 $78 $71,4	Min.: 1 Mult.: 1 : 2.000			10 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 1 OHM 5% 200PPM 1W HSMW0309-1R0JT2 Welwyn Components / TT Electronics 1: $428 5.815In Stock New Product	Mfr. Part # HSMW0309-1R0JT2 Mouser Part # 756-HSMW0309-1R0JT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 1 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	5.815In Stock	Cut Tape $428 $321 $244 $143 Reel $88,9 View $117 $102 $88,9 $78 $71,4	Min.: 1 Mult.: 1 : 2.000			1 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 220 OHM 5% 200PPM 1W HSMW0309-220RJT2 Welwyn Components / TT Electronics 1: $450 4.808In Stock New Product	Mfr. Part # HSMW0309-220RJT2 Mouser Part # 756-HSMW0309-220RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 220 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	4.808In Stock	Cut Tape $450 $351 $267 $150 Reel $97,7 View $124 $108 $97,7 $83,4 $78	Min.: 1 Mult.: 1 : 2.000			220 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 2.2 OHM 5% 200PPM 1W HSMW0309-2R2JT2 Welwyn Components / TT Electronics 1: $428 5.970In Stock New Product	Mfr. Part # HSMW0309-2R2JT2 Mouser Part # 756-HSMW0309-2R2JT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 2.2 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	5.970In Stock	Cut Tape $428 $321 $244 $143 Reel $88,9 View $117 $102 $88,9 $78 $71,4	Min.: 1 Mult.: 1 : 2.000			2.2 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 4.7 OHM 5% 200PPM 1W HSMW0309-4R7JT2 Welwyn Components / TT Electronics 1: $439 5.934In Stock New Product	Mfr. Part # HSMW0309-4R7JT2 Mouser Part # 756-HSMW0309-4R7JT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 4.7 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	5.934In Stock	Cut Tape $439 $322 $245 $144 Reel $90 View $119 $103 $90 $78 $71,4	Min.: 1 Mult.: 1 : 2.000			4.7 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 470 OHM 5% 200PPM 1W HSMW0309-470RJT2 Welwyn Components / TT Electronics 1: $461 5In Stock 6.000Expected 10/14/2026 New Product	Mfr. Part # HSMW0309-470RJT2 Mouser Part # 756-HSMW0309-470RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 470 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	5In Stock 6.000Expected 10/14/2026	Cut Tape $461 $352 $268 $152 View Reel $85,6 $125 $109 $85,6 $85,6	Min.: 1 Mult.: 1 : 2.000			470 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 22 OHM 5% 200PPM 1W HSMW0309-22RJT2 Welwyn Components / TT Electronics 1: $439 5.950On Order New Product	Mfr. Part # HSMW0309-22RJT2 Mouser Part # 756-HSMW0309-22RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 22 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	5.950On Order	Cut Tape $439 $322 $245 $144 View Reel $93,3 $119 $103 $93,3 $93,3	Min.: 1 Mult.: 1 : 2.000			22 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape
	MELF Resistors 47 OHM 5% 200PPM 1W HSMW0309-47RJT2 Welwyn Components / TT Electronics 1: $439 6.000On Order New Product	Mfr. Part # HSMW0309-47RJT2 Mouser Part # 756-HSMW0309-47RJT2 New Product	Welwyn Components / TT Electronics	MELF Resistors 47 OHM 5% 200PPM 1W Learn More about Welwyn Components / TT Electronics welwyn hsmw resistors	Datasheet	6.000On Order	Cut Tape $439 $322 $245 $144 View Reel $93,3 $119 $103 $93,3 $93,3	Min.: 1 Mult.: 1 : 2.000			47 Ohms	1 W	5 %	200 PPM / C	- 55 C	+ 155 C	3.5 mm	9 mm	Reel, Cut Tape