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S520 Fast-Acting Ceramic Tube Fuses

Eaton Electronics S520 Fast-Acting Ceramic Tube Fuses provide reliable overcurrent protection up to 20A and 420V_AC for high power and higher voltage applications, respectively. Typical applications include data centers, telecom systems, and intelligent commercial buildings. The S520 fuses are available in a compact small-footprint 5mm x 20mm cartridge or axial leaded packages, providing excellent board savings. These fuses can withstand operating temperatures ranging from -55°C to +125°C, making them suitable for use in various environments. All products are lead-free, halogen-free, and RoHS compliant.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CRC) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Product	Current Rating	Fuse Type	Fuse Size / Group	Voltage Rating AC	Interrupt Rating	Mounting Style	Termination Style	Minimum Operating Temperature	Maximum Operating Temperature	Packaging	Resistance
Cartridge Fuses 12.5A 420V FAST ACTING BK-S520-V-12-5-R Eaton Electronics 1: ₡3 117,59 448In Stock	Mfr. Part # BK-S520-V-12-5-R Mouser Part # 504-BK-S520-V-12-5-R	Eaton Electronics	Cartridge Fuses 12.5A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	448In Stock	₡3 117,59 ₡2 612,74 ₡2 035,02 ₡1 982,97 View ₡1 946,54 ₡1 842,45 ₡1 530,17 Quote	Min.: 1 Mult.: 1	S520	Ceramic Fuses	12.5 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8.1 mOhms
Cartridge Fuses 15A 420V FAST ACTING BK-S520-15-R Eaton Electronics 1: ₡3 372,62 11In Stock	Mfr. Part # BK-S520-15-R Mouser Part # 504-BK-S520-15-R	Eaton Electronics	Cartridge Fuses 15A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	11In Stock	₡3 372,62 ₡3 128,00 ₡2 940,63 ₡2 274,43 View ₡2 092,27 ₡1 837,24 ₡1 727,95 ₡1 717,54	Min.: 1 Mult.: 1	S520	Ceramic Fuses	15 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.8 mOhms
Cartridge Fuses 16A 420V FAST ACTING BK-S520-16-R Eaton Electronics 1: ₡2 310,87 78In Stock	Mfr. Part # BK-S520-16-R Mouser Part # 504-BK-S520-16-R	Eaton Electronics	Cartridge Fuses 16A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	78In Stock	₡2 310,87 ₡1 920,52 ₡1 774,79 ₡1 623,85	Min.: 1 Mult.: 1	S520	Ceramic Fuses	16 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.1 mOhms
Cartridge Fuses 8A 420V FAST ACTING BK-S520-8-R Eaton Electronics 1: ₡2 399,35 198In Stock	Mfr. Part # BK-S520-8-R Mouser Part # 504-BK-S520-8-R	Eaton Electronics	Cartridge Fuses 8A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	198In Stock	₡2 399,35 ₡1 993,38 ₡1 837,24 ₡1 832,04 View ₡1 681,10 ₡1 623,85	Min.: 1 Mult.: 1	S520	Ceramic Fuses	8 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	9 mOhms
Cartridge Fuses 10A 420V FAST ACTING BK-S520-V-10-R Eaton Electronics 1: ₡2 898,99 166In Stock	Mfr. Part # BK-S520-V-10-R Mouser Part # 504-BK-S520-V-10-R	Eaton Electronics	Cartridge Fuses 10A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	166In Stock	₡2 898,99 ₡2 404,55 ₡2 222,39 ₡2 185,95 View ₡1 982,97 ₡1 660,28	Min.: 1 Mult.: 1	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8 mOhms
Cartridge Fuses 15A 420V FAST ACTING BK-S520-V-15-R Eaton Electronics 1: ₡3 450,69 128In Stock	Mfr. Part # BK-S520-V-15-R Mouser Part # 504-BK-S520-V-15-R	Eaton Electronics	Cartridge Fuses 15A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	128In Stock	₡3 450,69 ₡3 216,48 ₡2 539,87 ₡2 279,64 View ₡1 873,68 ₡1 764,38 ₡1 660,28	Min.: 1 Mult.: 1	S520	Ceramic Fuses	15 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.8 mOhms
Cartridge Fuses 8A 420V FAST ACTING BK-S520-V-8-R Eaton Electronics 1: ₡3 450,69 1In Stock	Mfr. Part # BK-S520-V-8-R Mouser Part # 504-BK-S520-V-8-R	Eaton Electronics	Cartridge Fuses 8A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	1In Stock	₡3 450,69 ₡3 029,11 ₡2 321,28 ₡2 139,11 View ₡1 873,68 ₡1 774,79 ₡1 764,38	Min.: 1 Mult.: 1	S520	Ceramic Fuses	8 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	9 mOhms
Cartridge Fuses S520 420Vac, 12.5A, bulk BK/S520-12-5-R Eaton Electronics 1: ₡3 690,10 12In Stock	Mfr. Part # BK/S520-12-5-R Mouser Part # 504-BK/S520-12-5-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 12.5A, bulk Learn More about Eaton Electronics eaton s520	Datasheet	12In Stock	₡3 690,10 ₡3 429,87 ₡2 919,81 ₡2 378,53 View ₡2 029,82 ₡1 889,29 ₡1 806,01	Min.: 1 Mult.: 1	S520	Ceramic Fuses	12.5 A		5 mm x 20 mm							Bulk
Cartridge Fuses 10A 420V FAST ACTING BK-S520-10-R Eaton Electronics 1: ₡3 372,62 200On Order	Mfr. Part # BK-S520-10-R Mouser Part # 504-BK-S520-10-R	Eaton Electronics	Cartridge Fuses 10A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	200On Order	₡3 372,62 ₡2 966,65 ₡2 737,65 ₡2 274,43 View ₡2 092,27 ₡1 837,24 ₡1 727,95	Min.: 1 Mult.: 1	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8 mOhms
Cartridge Fuses 20A 420V FAST ACTING BK-S520-20-R Eaton Electronics 1: ₡3 206,07 200On Order	Mfr. Part # BK-S520-20-R Mouser Part # 504-BK-S520-20-R	Eaton Electronics	Cartridge Fuses 20A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	200On Order On Order Ship Dates Mfr. #: BK-S520-20-R Stock: 0 On Order: 100 Pending 100 Expected 10/23/2026 Factory Lead-Time: 12 Weeks	₡3 206,07 ₡2 664,78 ₡2 456,60 ₡2 040,22 View ₡1 878,88 ₡1 649,88	Min.: 1 Mult.: 1	S520	Ceramic Fuses	20 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	5 mOhms
Cartridge Fuses S520 420Vac, 10A, standard S520-10-R Eaton Electronics 1: ₡6 214,36 105On Order	Mfr. Part # S520-10-R Mouser Part # 504-S520-10-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 10A, standard Learn More about Eaton Electronics eaton s520	Datasheet	105On Order	₡6 214,36 ₡3 778,58 ₡3 383,03 ₡2 987,47 ₡2 966,65	Min.: 1 Mult.: 1	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8 mOhms
Cartridge Fuses 16A 420V FAST ACTING BK-S520-V-16-R Eaton Electronics 1: ₡1 925,72 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK-S520-V-16-R Mouser Part # 504-BK-S520-V-16-R	Eaton Electronics	Cartridge Fuses 16A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 925,72 ₡1 727,95 ₡1 660,28	Min.: 1 Mult.: 1	S520	Ceramic Fuses	16 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.1 mOhms
Cartridge Fuses 20A 420V FAST ACTING BK-S520-V-20-R Eaton Electronics 1: ₡3 450,69 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK-S520-V-20-R Mouser Part # 504-BK-S520-V-20-R	Eaton Electronics	Cartridge Fuses 20A 420V FAST ACTING Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡3 450,69 ₡3 029,11 ₡2 794,90 ₡2 321,28 View ₡2 113,09 ₡1 873,68 ₡1 764,38 ₡1 759,17	Min.: 1 Mult.: 1	S520	Ceramic Fuses	20 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	5 mOhms
Cartridge Fuses S520 420Vac, 10A, BK1 BK1-S520-10-R Eaton Electronics 1 000: ₡1 644,67 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-10-R Mouser Part # 504-BK1-S520-10-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 10A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 644,67	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8 mOhms
Cartridge Fuses S520 420Vac, 12.5A, BK1 BK1-S520-12-5-R Eaton Electronics 1 000: ₡1 644,67 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-12-5-R Mouser Part # 504-BK1-S520-12-5-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 12.5A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 644,67	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	12.5 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8.1 mOhms
Cartridge Fuses S520 420Vac, 15A, BK1 BK1-S520-15-R Eaton Electronics 1 000: ₡1 644,67 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-15-R Mouser Part # 504-BK1-S520-15-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 15A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 644,67	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	15 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.8 mOhms
Cartridge Fuses S520 420Vac, 16A, BK1 BK1-S520-16-R Eaton Electronics 1 000: ₡1 769,58 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-16-R Mouser Part # 504-BK1-S520-16-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 16A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 769,58	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	16 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.1 mOhms
Cartridge Fuses S520 420Vac, 20A, BK1 BK1-S520-20-R Eaton Electronics 1 000: ₡1 644,67 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-20-R Mouser Part # 504-BK1-S520-20-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 20A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 644,67	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	20 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	5 mOhms
Cartridge Fuses S520 420Vac, 8A, BK1 BK1-S520-8-R Eaton Electronics 1 000: ₡1 644,67 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # BK1-S520-8-R Mouser Part # 504-BK1-S520-8-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 8A, BK1 Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡1 644,67	Min.: 1 000 Mult.: 1 000	S520	Ceramic Fuses	8 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	9 mOhms
Cartridge Fuses S520 420Vac, 12.5A, standard S520-12-5-R Eaton Electronics 1: ₡6 214,36 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # S520-12-5-R Mouser Part # 504-S520-12-5-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 12.5A, standard Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡6 214,36 ₡3 716,12 ₡3 398,64 ₡2 966,65	Min.: 1 Mult.: 1	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	8.1 mOhms
Cartridge Fuses S520 420Vac, 15A, standard S520-15-R Eaton Electronics 1: ₡6 214,36 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # S520-15-R Mouser Part # 504-S520-15-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 15A, standard Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡6 214,36 ₡4 585,30 ₡3 653,67 ₡3 507,94 View ₡3 336,18 ₡3 216,48 ₡3 096,77 ₡2 997,88 Quote	Min.: 1 Mult.: 1	S520	Ceramic Fuses	15 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.8 mOhms
Cartridge Fuses S520 420Vac, 16A, standard S520-16-R Eaton Electronics 1: ₡6 214,36 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # S520-16-R Mouser Part # 504-S520-16-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 16A, standard Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡6 214,36 ₡3 747,35 ₡3 367,41 ₡2 982,27 ₡2 966,65	Min.: 1 Mult.: 1	S520	Ceramic Fuses	16 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	6.1 mOhms
Cartridge Fuses S520 420Vac, 20A, standard S520-20-R Eaton Electronics 1: ₡6 214,36 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # S520-20-R Mouser Part # 504-S520-20-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 20A, standard Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡6 214,36 ₡4 106,47 ₡3 674,49 ₡3 278,93 View ₡3 044,72 ₡2 966,65	Min.: 1 Mult.: 1	S520	Ceramic Fuses	20 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	5 mOhms
Cartridge Fuses S520 420Vac, 8A, standard S520-8-R Eaton Electronics 1: ₡6 214,36 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # S520-8-R Mouser Part # 504-S520-8-R	Eaton Electronics	Cartridge Fuses S520 420Vac, 8A, standard Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	₡6 214,36 ₡4 934,01 ₡4 777,87 ₡4 288,63 View ₡4 064,83 ₡3 950,33 ₡3 825,42 ₡3 721,33 Quote	Min.: 1 Mult.: 1	S520	Ceramic Fuses	8 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Bulk	9 mOhms
Cartridge Fuses S520 axial 420Vac, 10A, tape and reel TR2-S520-V-10-R Eaton Electronics 1 500: ₡1 691,51 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # TR2-S520-V-10-R Mouser Part # 504-TR2-S520-V-10-R	Eaton Electronics	Cartridge Fuses S520 axial 420Vac, 10A, tape and reel Learn More about Eaton Electronics eaton s520	Datasheet	Non-Stocked Lead-Time 12 Weeks	Reel ₡1 691,51	Min.: 1 500 Mult.: 1 500 : 1 500	S520	Ceramic Fuses	10 A	Fast Blow	5 mm x 20 mm	420 VAC	1.5 kA	Board Mount	Axial	- 55 C	+ 125 C	Reel	8 mOhms

S520 Fast-Acting Ceramic Tube Fuses

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