Cartridge Fuses – Mouser United Kingdom

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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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Part #

Cartridge Fuses 12.5A 420V FAST ACTING

BK-S520-V-12-5-R
Eaton Electronics
1: £4.50
448In Stock

Mfr. Part No.
BK-S520-V-12-5-R

Mouser Part No
504-BK-S520-V-12-5-R

Eaton Electronics

Cartridge Fuses 12.5A 420V FAST ACTING

Learn More

Datasheet

448In Stock

£4.50

£3.77

£2.93

£2.92

View

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 10A 420V FAST ACTING

BK-S520-10-R
Eaton Electronics
1: £3.57
17In Stock
200Expected 10/09/2026

Mfr. Part No.
BK-S520-10-R

Mouser Part No
504-BK-S520-10-R

Eaton Electronics

Cartridge Fuses 10A 420V FAST ACTING

Learn More

Datasheet

17In Stock

200Expected 10/09/2026

£3.57

£3.29

£2.72

£2.51

View

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-S520-15-R
Eaton Electronics
1: £3.57
11In Stock

Mfr. Part No.
BK-S520-15-R

Mouser Part No
504-BK-S520-15-R

Eaton Electronics

Cartridge Fuses 15A 420V FAST ACTING

Learn More

Datasheet

11In Stock

£3.57

£3.30

£2.73

£2.72

£2.21

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: £2.77
78In Stock

Mfr. Part No.
BK-S520-16-R

Mouser Part No
504-BK-S520-16-R

Eaton Electronics

Cartridge Fuses 16A 420V FAST ACTING

Learn More

Datasheet

78In Stock

£2.77

£2.56

£2.12

£2.10

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: £2.87
198In Stock

Mfr. Part No.
BK-S520-8-R

Mouser Part No
504-BK-S520-8-R

Eaton Electronics

Cartridge Fuses 8A 420V FAST ACTING

Learn More

Datasheet

198In Stock

£2.87

£2.65

£2.43

£2.10

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: £3.47
166In Stock

Mfr. Part No.
BK-S520-V-10-R

Mouser Part No
504-BK-S520-V-10-R

Eaton Electronics

Cartridge Fuses 10A 420V FAST ACTING

Learn More

Datasheet

166In Stock

£3.47

£3.20

£3.18

£2.50

View

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: £4.28
143In Stock

Mfr. Part No.
BK-S520-V-15-R

Mouser Part No
504-BK-S520-V-15-R

Eaton Electronics

Cartridge Fuses 15A 420V FAST ACTING

Learn More

Datasheet

143In Stock

£4.28

£3.83

£3.02

£2.72

View

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: £4.85
1In Stock

Mfr. Part No.
BK-S520-V-8-R

Mouser Part No
504-BK-S520-V-8-R

Eaton Electronics

Cartridge Fuses 8A 420V FAST ACTING

Learn More

Datasheet

1In Stock

£4.85

£4.07

£3.17

£2.85

View

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: £4.97
44In Stock

Mfr. Part No.
BK/S520-12-5-R

Mouser Part No
504-BK/S520-12-5-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 12.5A, bulk

Learn More

Datasheet

44In Stock

£4.97

£4.67

£4.48

£3.10

View

Min.: 1
Mult.: 1

S520

Ceramic Fuses

12.5 A

5 mm x 20 mm

Bulk

Cartridge Fuses 20A 420V FAST ACTING

BK-S520-20-R
Eaton Electronics
1: £3.84
130On Order

Mfr. Part No.
BK-S520-20-R

Mouser Part No
504-BK-S520-20-R

Eaton Electronics

Cartridge Fuses 20A 420V FAST ACTING

Learn More

Datasheet

130On Order

£3.84

£3.54

£2.94

£2.71

View

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: £8.02
105Expected 09/09/2026

Mfr. Part No.
S520-10-R

Mouser Part No
504-S520-10-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 10A, standard

Learn More

Datasheet

105Expected 09/09/2026

£8.02

£6.24

£4.97

£4.76

View

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: £2.30
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK-S520-V-16-R

Mouser Part No
504-BK-S520-V-16-R

Eaton Electronics

Cartridge Fuses 16A 420V FAST ACTING

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.30

£2.19

£2.14

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: £3.95
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK-S520-V-20-R

Mouser Part No
504-BK-S520-V-20-R

Eaton Electronics

Cartridge Fuses 20A 420V FAST ACTING

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£3.95

£3.64

£3.02

£2.65

View

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-10-R

Mouser Part No
504-BK1-S520-10-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 10A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-12-5-R

Mouser Part No
504-BK1-S520-12-5-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 12.5A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-15-R

Mouser Part No
504-BK1-S520-15-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 15A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-16-R

Mouser Part No
504-BK1-S520-16-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 16A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-20-R

Mouser Part No
504-BK1-S520-20-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 20A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £2.12
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
BK1-S520-8-R

Mouser Part No
504-BK1-S520-8-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 8A, BK1

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£2.12

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: £7.73
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
S520-12-5-R

Mouser Part No
504-S520-12-5-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 12.5A, standard

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£7.73

£3.83

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: £8.02
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
S520-15-R

Mouser Part No
504-S520-15-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 15A, standard

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£8.02

£6.24

£4.97

£4.49

View

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: £8.02
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
S520-16-R

Mouser Part No
504-S520-16-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 16A, standard

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£8.02

£6.24

£4.97

£4.46

View

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: £8.42
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
S520-20-R

Mouser Part No
504-S520-20-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 20A, standard

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£8.42

£3.83

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: £7.73
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
S520-8-R

Mouser Part No
504-S520-8-R

Eaton Electronics

Cartridge Fuses S520 420Vac, 8A, standard

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

£7.73

£5.76

£5.36

£4.91

View

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: £2.23
Non-Stocked Lead-Time 12 Weeks

Mfr. Part No.
TR2-S520-V-10-R

Mouser Part No
504-TR2-S520-V-10-R

Eaton Electronics

Cartridge Fuses S520 axial 420Vac, 10A, tape and reel

Learn More

Datasheet

Non-Stocked Lead-Time 12 Weeks

Reel

£2.23

£2.22

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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