Surface Mount Fuses – Mouser Switzerland

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437 Series SMT Fuses

Littelfuse 437 Series SMT Fuses protect circuits against overcurrent in ambient high-temperature situations. These ceramic fuses operate bewteen -55° and +150°C temperatures, providing both high I²t values and inrush current withstand capabilities. The halogen-free 437 series gives users a high performance reliability, with models ranging from 250mA to 8A current rating. These Littelfuse fast-acting, surface mount fuses are suitable for both leaded and lead-free reflow as well as wave soldering. 437 series fuses are ideal for servers, printers, scanners, data modems, LCD displays, and LED lighting applications.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CHF) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Product	Fuse Type	Current Rating	Voltage Rating AC	Voltage Rating DC	Interrupt Rating	Fuse Size/Group	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging	Resistance
Surface Mount Fuses 32V FA 1206 3.5A 043703.5WR Littelfuse 1: 1.24 CHF 3 393In Stock	Mfr. Part No. 043703.5WR Mouser Part No 576-043703.5WR	Littelfuse	Surface Mount Fuses 32V FA 1206 3.5A Learn More about Littelfuse 437 smt fuses	Datasheet	3 393In Stock	Cut Tape 1.24 CHF 1.04 CHF 0.955 CHF 0.792 CHF View Reel 0.526 CHF 0.731 CHF 0.657 CHF 0.606 CHF 0.558 CHF 0.526 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	3.5 A	45 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	27 mOhms
Surface Mount Fuses 63V 1.25A FA 1206 04371.25WR Littelfuse 1: 1.25 CHF 3 028In Stock	Mfr. Part No. 04371.25WR Mouser Part No 576-04371.25WR	Littelfuse	Surface Mount Fuses 63V 1.25A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	3 028In Stock	Cut Tape 1.25 CHF 1.11 CHF 1.06 CHF 0.854 CHF View Reel 0.526 CHF 0.731 CHF 0.699 CHF 0.607 CHF 0.559 CHF 0.526 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	1.25 A	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	318 mOhms
Surface Mount Fuses 63V 1.75A FA 1206 04371.75WR Littelfuse 1: 1.25 CHF 6 396In Stock	Mfr. Part No. 04371.75WR Mouser Part No 576-04371.75WR	Littelfuse	Surface Mount Fuses 63V 1.75A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	6 396In Stock	Cut Tape 1.25 CHF 1.11 CHF 1.06 CHF 0.854 CHF View Reel 0.539 CHF 0.731 CHF 0.699 CHF 0.607 CHF 0.559 CHF 0.539 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	1.75 A	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	71 mOhms
Surface Mount Fuses 125V .250A FA 1206 0437.250WR Littelfuse 1: 0.992 CHF 39 766In Stock	Mfr. Part No. 0437.250WR Mouser Part No 576-0437.250WR	Littelfuse	Surface Mount Fuses 125V .250A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	39 766In Stock	Cut Tape 0.992 CHF 0.894 CHF 0.737 CHF 0.67 CHF View Reel 0.598 CHF 0.608 CHF 0.598 CHF 0.598 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	250 mA	125 VAC	125 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	2.29 Ohms
Surface Mount Fuses 63V FA 1206 1A 0437001.WR Littelfuse 1: 1.36 CHF 24 678In Stock 9 000Expected 03/11/2026	Mfr. Part No. 0437001.WR Mouser Part No 576-0437001.WR	Littelfuse	Surface Mount Fuses 63V FA 1206 1A Learn More about Littelfuse 437 smt fuses	Datasheet	24 678In Stock 9 000Expected 03/11/2026	Cut Tape 1.36 CHF 1.21 CHF 1.10 CHF 0.926 CHF View Reel 0.749 CHF 0.813 CHF 0.749 CHF 0.749 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	1 A	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	360 mOhms
Surface Mount Fuses FUSE 125V FA 1206 .250A AECQ 0437.250WRA Littelfuse 1: 1.09 CHF 12 477In Stock 9 000Expected 11/03/2027	Mfr. Part No. 0437.250WRA Mouser Part No 576-0437.250WRA	Littelfuse	Surface Mount Fuses FUSE 125V FA 1206 .250A AECQ	Datasheet	12 477In Stock 9 000Expected 11/03/2027	Cut Tape 1.09 CHF 1.00 CHF 0.829 CHF 0.763 CHF View Reel 0.606 CHF 0.686 CHF 0.632 CHF 0.606 CHF 0.606 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Fuses	Fast Blow	250 mA	125 VAC	125 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C	AEC-Q200	Reel, Cut Tape, MouseReel	2.29 Ohms
Surface Mount Fuses 125V .375A FA 1206 0437.375WR Littelfuse 1: 1.06 CHF 9 731In Stock	Mfr. Part No. 0437.375WR Mouser Part No 576-0437.375WR	Littelfuse	Surface Mount Fuses 125V .375A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	9 731In Stock	Cut Tape 1.06 CHF 0.945 CHF 0.917 CHF Reel 0.917 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	375 mA	125 VAC	125 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	1.33 Ohms
Surface Mount Fuses .375A 125V AECQ 0437.375WRA Littelfuse 1: 1.41 CHF 15 712In Stock	Mfr. Part No. 0437.375WRA Mouser Part No 576-0437.375WRA	Littelfuse	Surface Mount Fuses .375A 125V AECQ	Datasheet	15 712In Stock	Cut Tape 1.41 CHF 1.21 CHF 1.13 CHF 0.926 CHF View Reel 0.606 CHF 0.821 CHF 0.762 CHF 0.68 CHF 0.627 CHF 0.606 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Fuses	Fast Blow	375 mA	125 VAC	125 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C	AEC-Q200	Reel, Cut Tape, MouseReel	1.33 Ohms
Surface Mount Fuses 63V .500A FA 1206 0437.500WR Littelfuse 1: 0.992 CHF 10 857In Stock	Mfr. Part No. 0437.500WR Mouser Part No 576-0437.500WR	Littelfuse	Surface Mount Fuses 63V .500A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	10 857In Stock	Cut Tape 0.992 CHF 0.91 CHF 0.739 CHF 0.645 CHF View Reel 0.461 CHF 0.585 CHF 0.539 CHF 0.529 CHF 0.461 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	500 mA	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	908 mOhms
Surface Mount Fuses 63V .750A FA 1206 0437.750WR Littelfuse 1: 1.21 CHF 3 225In Stock	Mfr. Part No. 0437.750WR Mouser Part No 576-0437.750WR	Littelfuse	Surface Mount Fuses 63V .750A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	3 225In Stock	Cut Tape 1.21 CHF 1.12 CHF 0.926 CHF 0.813 CHF View Reel 0.578 CHF 0.722 CHF 0.665 CHF 0.617 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	750 mA	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	665 mOhms
Surface Mount Fuses 63V FA 1206 2A 0437002.WR Littelfuse 1: 1.21 CHF 4 711In Stock 3 000Expected 14/06/2027	Mfr. Part No. 0437002.WR Mouser Part No 576-0437002.WR	Littelfuse	Surface Mount Fuses 63V FA 1206 2A Learn More about Littelfuse 437 smt fuses	Datasheet	4 711In Stock 3 000Expected 14/06/2027	Cut Tape 1.21 CHF 1.12 CHF 0.926 CHF 0.854 CHF View Reel 0.73 CHF 0.767 CHF 0.73 CHF 0.73 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	2 A	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	62 mOhms
Surface Mount Fuses 32V FA 1206 3A 0437003.WR Littelfuse 1: 1.28 CHF 9 798In Stock	Mfr. Part No. 0437003.WR Mouser Part No 576-0437003.WR	Littelfuse	Surface Mount Fuses 32V FA 1206 3A Learn More about Littelfuse 437 smt fuses	Datasheet	9 798In Stock	Cut Tape 1.28 CHF 1.15 CHF 0.983 CHF 0.87 CHF View Reel 0.578 CHF 0.776 CHF 0.707 CHF 0.651 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	3 A	32 VAC	35 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	33 mOhms
Surface Mount Fuses 32V FA 1206 5A 0437005.WR Littelfuse 1: 1.28 CHF 11 797In Stock	Mfr. Part No. 0437005.WR Mouser Part No 576-0437005.WR	Littelfuse	Surface Mount Fuses 32V FA 1206 5A Learn More about Littelfuse 437 smt fuses	Datasheet	11 797In Stock	Cut Tape 1.28 CHF 1.13 CHF 0.983 CHF 0.87 CHF View Reel 0.578 CHF 0.813 CHF 0.749 CHF 0.669 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	5 A	32 VAC	35 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	16 mOhms
Surface Mount Fuses 32V FA 1206 2.5A 043702.5WR Littelfuse 1: 1.39 CHF 2 549In Stock	Mfr. Part No. 043702.5WR Mouser Part No 576-043702.5WR	Littelfuse	Surface Mount Fuses 32V FA 1206 2.5A Learn More about Littelfuse 437 smt fuses	Datasheet	2 549In Stock	Cut Tape 1.39 CHF 1.21 CHF 1.11 CHF 0.926 CHF View Reel 0.578 CHF 0.829 CHF 0.762 CHF 0.692 CHF 0.642 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	2.5 A	45 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	43 mOhms
Surface Mount Fuses 32V FA 1206 4A 0437004.WR Littelfuse 1: 1.28 CHF 1 498In Stock 9 000On Order	Mfr. Part No. 0437004.WR Mouser Part No 576-0437004.WR	Littelfuse	Surface Mount Fuses 32V FA 1206 4A Learn More about Littelfuse 437 smt fuses	Datasheet	1 498In Stock 9 000On Order On Order Ship Dates Mfr. No: 0437004.WR Stock: 1 498 Can Dispatch Immediately On Order: 3 000 Expected 16/11/2026 6 000 Expected 23/11/2026 Factory Lead Time: 27 Weeks	Cut Tape 1.28 CHF 1.18 CHF 0.945 CHF 0.837 CHF View Reel 0.578 CHF 0.752 CHF 0.694 CHF 0.614 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	4 A	32 VAC	32 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	22 mOhms
Surface Mount Fuses 32V FA 1206 7A 0437007.WR Littelfuse 1: 1.44 CHF 568In Stock 9 000Expected 11/01/2027	Mfr. Part No. 0437007.WR Mouser Part No 576-0437007.WR	Littelfuse	Surface Mount Fuses 32V FA 1206 7A Learn More about Littelfuse 437 smt fuses	Datasheet	568In Stock 9 000Expected 11/01/2027	Cut Tape 1.44 CHF 1.20 CHF 1.04 CHF 0.91 CHF View Reel 0.578 CHF 0.799 CHF 0.736 CHF 0.68 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	7 A	32 VAC	35 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	10 mOhms
Surface Mount Fuses 32V FA 1206 8A 0437008.WR Littelfuse 1: 1.41 CHF 200In Stock 9 000On Order	Mfr. Part No. 0437008.WR Mouser Part No 576-0437008.WR	Littelfuse	Surface Mount Fuses 32V FA 1206 8A Learn More about Littelfuse 437 smt fuses	Datasheet	200In Stock 9 000On Order On Order Ship Dates Mfr. No: 0437008.WR Stock: 200 Can Dispatch Immediately On Order: 3 000 Expected 30/11/2026 6 000 Expected 28/12/2026 Factory Lead Time: 27 Weeks	Cut Tape 1.41 CHF 1.18 CHF 1.02 CHF 0.91 CHF View Reel 0.578 CHF 0.813 CHF 0.745 CHF 0.688 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	8 A	32 VAC	35 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	8.7 mOhms
Surface Mount Fuses 63V FA 1206 1.5A 043701.5WR Littelfuse 1: 1.21 CHF 1 557In Stock 3 000Expected 15/04/2027	Mfr. Part No. 043701.5WR Mouser Part No 576-043701.5WR	Littelfuse	Surface Mount Fuses 63V FA 1206 1.5A Learn More about Littelfuse 437 smt fuses	Datasheet	1 557In Stock 3 000Expected 15/04/2027	Cut Tape 1.21 CHF 1.12 CHF 0.926 CHF 0.854 CHF View Reel 0.578 CHF 0.767 CHF 0.707 CHF 0.651 CHF 0.578 CHF MouseReel Available	Min.: 1 Mult.: 1 : 3 000	437	Surface Mount Ceramic Fuses	Fast Blow	1.5 A	63 VAC	63 VDC	50 A, 50 A	1206 (3216 metric)	- 55 C	+ 150 C		Reel, Cut Tape, MouseReel	209 mOhms
Surface Mount Fuses FUSE 63V AUTOC FA 1206 .750A 0437.750KRA Littelfuse 10 000: 0.584 CHF Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 0437.750KRA Mouser Part No 576-0437.750KRA	Littelfuse	Surface Mount Fuses FUSE 63V AUTOC FA 1206 .750A	Datasheet	Non-Stocked Lead-Time 21 Weeks	Reel 0.584 CHF	Min.: 10 000 Mult.: 10 000 : 10 000	437											Reel
Surface Mount Fuses FUSE 63V AUTOC FA 1206 2A 0437002.KRA Littelfuse 10 000: 0.642 CHF Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 0437002.KRA Mouser Part No 576-0437002.KRA	Littelfuse	Surface Mount Fuses FUSE 63V AUTOC FA 1206 2A	Datasheet	Non-Stocked Lead-Time 21 Weeks	Reel 0.642 CHF	Min.: 10 000 Mult.: 10 000 : 10 000	437											Reel
Surface Mount Fuses 63V 1.75A FA 1206 04371.75WRP Littelfuse 3 000: 0.591 CHF Non-Stocked	Mfr. Part No. 04371.75WRP Mouser Part No 576-04371.75WRP	Littelfuse	Surface Mount Fuses 63V 1.75A FA 1206 Learn More about Littelfuse 437 smt fuses	Datasheet	Non-Stocked	Reel 0.591 CHF	Min.: 3 000 Mult.: 3 000 : 3 000	437	Surface Mount Fuses										Reel

437 Series SMT Fuses

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