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ESKA - our favourite fuses

70 years of experience and quality “Made in Germany” - this is ESKA fuses. Check out how to choose a suitable fuse for your application. Also, find the most common ESKA cartridge fuses series in our stock range.
This is an archive article published 10/17/2019. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

For more than 70 years, ESKA Erich Schweizer GmbH has been developing and manufacturing fuses at its headquarters in Kassel under the “Made in Germany” quality label. ESKA offers fuses manufactured following international standards IEC / EN 60127, UL 248-14 and DIN as well as non-standard fuses. We’ve chosen the most popular series of 5x20mm cartridge fuses for our warehouse:

520.600: EN 60127-2-2, type F (quick-acting), low breaking capacity (35A)
522.500: EN 60127-2-3, type T (time lag) low breaking capacity (35A)

It is not possible to recommend correct fuse without detailed information about your application, but ESKA provides at least general guidelines for selecting the right fuse:

FF – Very fast-acting fuses are intended as short-circuit protection for semiconductors (diodes, thyristors, triacs, etc.) and for devices for which fast-acting fuses are still too slow. 

F – Quick-acting fuses are used for protection of a device without inrush current during switching on and also for the devices where high overcurrent or high short-circuit current must be interrupted quickly.
M – Medium time-lag fuses are used mainly when only small inrush currents have to be taken into consideration.
T – Time-delayed fuses are used for devices with high inrush current during switching on and slowly dropping to a steady value, for example when starting engines.
TT – Super time-lag fuses are used when the expected current surges will be greater than those which current surge resisting fuses can withstand.

FF, M and TT types are not standardized; ESKA manufactures them according to their company standards.

Recommended series of fuses for specific applications:

● For high pulse resistance at a rated voltage of 250 V (protection of switching power supplies with parallel MOV at the input, test with 8/20 µs wave at ≥ 2 kV with 2 Ω): Series 521.5XX ≥2.5 A, UL522.2XX ≥1,25 A, 522.4XX ≥1 A
● For high efficient circuits with transducers working in the kHz range: Series 522.7XX, 522.3XX, 522.0XX
● For applications with increased continuous operating current (cooling and heating systems, fans): Series 521.0XX, 632.1XX, 632.5XX, 632.0XX, 632.2XX, 1038.6XX, 1038.3XX
● For circuits with low internal resistance (high short-circuit current): Series 521.0XX ≥1.6 A, 522.7XX
● For applications with high assembly density at moderate short-circuit currents (consumer electronics): Series 885.0XX, 887.0XX, 883.0XX
● For low signal distortion in data transmission etc.: SMD Chip
● For semiconductor protection (diodes, thyristors, etc.): Series 520.1XX, 520.5XX, 520.0XX, 1038.1XX
● For industrial control systems: Series ES-MSXX, 888.4XX, 220.0XX, 222.0XX
● Short-circuit protection for batteries: 823.6XX, 888.3XX, 888.2XX
● For telecommunication applications according to ITU-K20/21, Telcordia, UL 1950: Series 522.5XX ≥1.25 A, 530.6XX, ES-SMP ≥1,25 A
● Fuses for lamp ballasts: Series 515.3XX ≥1.25 A
● Fuses following IEC 60127-4 (UMF, Universal Modular Fuses): Series 900.0XX, 910.0XX

Selected ESKA fuses can be found in our stock assortment, the other series can be ordered upon request.

If you are interested in other ESKA products or you need more details, we are ready to help you at sales@soselectronic.com

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Additional products


520.030 5x20 F 16A (520030) ESKA  
520.030 5x20 F 16A (520030)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 16A 250VAC

Cartridge Fuses

Ord. No.: 319990
Manufacturer: ESKA
in stock 90 pcs
(10/18/2024: 1000 pcs)
(11/08/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0810 £
0,0720 £
0,0661 £
0,0619 £
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520.604 5x20 F 50mA (520604) ESKA  
520.604 5x20 F 50mA (520604)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 50mA 250VAC

Cartridge Fuses

Ord. No.: 319148
Manufacturer: ESKA
in stock 240 pcs
10 pcs+
20 pcs+
50 pcs+
200 pcs+
800 pcs+
0,3827 £
0,3701 £
0,3408 £
0,3157 £
0,2956 £
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520.605 5x20 F 63mA (520605) ESKA  
520.605 5x20 F 63mA (520605)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 63mA 250VAC

Cartridge Fuses

Ord. No.: 319056
Manufacturer: ESKA
in stock 580 pcs
10 pcs+
20 pcs+
50 pcs+
200 pcs+
1200 pcs+
0,3014 £
0,2922 £
0,2688 £
0,2487 £
0,2236 £
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520.608 5x20 F 125mA (520608) ESKA  
520.608 5x20 F 125mA (520608)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 125mA 250VAC

Cartridge Fuses

Ord. No.: 319057
Manufacturer: ESKA
in stock 60 pcs
(12/06/2024: 100 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0808 £
0,0719 £
0,0660 £
0,0617 £
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520.609 5x20 F 160mA (520609) ESKA  
520.609 5x20 F 160mA (520609)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 160mA 250VAC

Cartridge Fuses

Ord. No.: 319058
Manufacturer: ESKA
in stock 0 pcs
(10/18/2024: 100 pcs)
(10/25/2024: 100 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0808 £
0,0719 £
0,0660 £
0,0617 £
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520.611 5x20 F 250mA (520611) ESKA  
520.611 5x20 F 250mA (520611)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 250mA 250VAC

Cartridge Fuses

Ord. No.: 319060
Manufacturer: ESKA
in stock 220 pcs
(10/25/2024: 100 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0658 £
0,0616 £
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520.615 5x20 F 630mA (520615) ESKA  
520.615 5x20 F 630mA (520615)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 630mA 250VAC

Cartridge Fuses

Ord. No.: 319063
Manufacturer: ESKA
in stock 160 pcs
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0807 £
0,0718 £
0,0659 £
0,0616 £
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520.617 5x20 F 1A (520617) ESKA  
520.617 5x20 F 1A (520617)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 1A 250VAC

Cartridge Fuses

Ord. No.: 319065
Manufacturer: ESKA
in stock 0 pcs
(10/18/2024: 3000 pcs)
(10/25/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0659 £
0,0616 £
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520.618 5x20 F 1,25A (520618) ESKA  
520.618 5x20 F 1,25A (520618)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 1,25A 250VAC

Cartridge Fuses

Ord. No.: 319066
Manufacturer: ESKA
in stock 120 pcs
(10/25/2024: 200 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0717 £
0,0658 £
0,0615 £
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520.620 5x20 F 2A (520620) ESKA  
520.620 5x20 F 2A (520620)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 2A 250VAC

Cartridge Fuses

Ord. No.: 319068
Manufacturer: ESKA
in stock 480 pcs
(12/06/2024: 2000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0921 £
0,0888 £
0,0790 £
0,0726 £
0,0663 £
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520.621 5x20 F 2,5A (520621) ESKA  
520.621 5x20 F 2,5A (520621)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 2,5A 250VAC

Cartridge Fuses

Ord. No.: 319069
Manufacturer: ESKA
in stock 1300 pcs
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0658 £
0,0615 £
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520.622 5x20 F 3,15A (520622) ESKA  
520.622 5x20 F 3,15A (520622)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 3,15A 250VAC

Cartridge Fuses

Ord. No.: 319070
Manufacturer: ESKA
in stock 380 pcs
(10/25/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0658 £
0,0615 £
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520.624 5x20 F 5A (520624) ESKA  
520.624 5x20 F 5A (520624)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 5A 250VAC

Cartridge Fuses

Ord. No.: 319072
Manufacturer: ESKA
in stock 540 pcs
(12/06/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0658 £
0,0616 £
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520.625 5x20 F 6,3A (520625) ESKA  
520.625 5x20 F 6,3A (520625)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 6,3A 250VAC

Cartridge Fuses

Ord. No.: 212639
Manufacturer: ESKA
in stock 90 pcs
(10/25/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0806 £
0,0718 £
0,0658 £
0,0615 £
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522.510 5x20 T 200mA (522510) ESKA  
522.510 5x20 T 200mA (522510)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 200mA 250VAC

Cartridge Fuses

Ord. No.: 319133
Manufacturer: ESKA
in stock 140 pcs
(11/08/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0871 £
0,0837 £
0,0747 £
0,0686 £
0,0641 £
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522.514 5x20 T 500mA (522514) ESKA  
522.514 5x20 T 500mA (522514)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 500mA 250VAC

Cartridge Fuses

Ord. No.: 319137
Manufacturer: ESKA
in stock 0 pcs
(11/08/2024: 1000 pcs)
(11/22/2024: 1000 pcs)
(12/06/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0862 £
0,0831 £
0,0740 £
0,0679 £
0,0636 £
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522.515 5x20 T 630mA (522515) ESKA  
522.515 5x20 T 630mA (522515)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 630mA 250VAC

Cartridge Fuses

Ord. No.: 319138
Manufacturer: ESKA
in stock 1700 pcs
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0808 £
0,0719 £
0,0660 £
0,0618 £
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522.517 5x20 T 1A (522517) ESKA  
522.517 5x20 T 1A (522517)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 1A 250VAC

Cartridge Fuses

Ord. No.: 319140
Manufacturer: ESKA
in stock 0 pcs
(10/25/2024: 1000 pcs)
(11/08/2024: 1000 pcs)
(11/22/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0871 £
0,0837 £
0,0749 £
0,0687 £
0,0643 £
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522.518 5x20 T 1,25A (522518) ESKA  
522.518 5x20 T 1,25A (522518)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 1,25A 250VAC

Cartridge Fuses

Ord. No.: 319141
Manufacturer: ESKA
in stock 180 pcs
(11/08/2024: 100 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0862 £
0,0831 £
0,0740 £
0,0679 £
0,0636 £
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522.519 5x20 T 1,6A (522519) ESKA  
522.519 5x20 T 1,6A (522519)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 1,6A 250VAC

Cartridge Fuses

Ord. No.: 319142
Manufacturer: ESKA
in stock 1440 pcs
(10/25/2024: 5000 pcs)
(12/06/2024: 8000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0862 £
0,0831 £
0,0740 £
0,0679 £
0,0636 £
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522.520 5x20 T 2A (522520) ESKA  
522.520 5x20 T 2A (522520)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 2A 250VAC

Cartridge Fuses

Ord. No.: 319143
Manufacturer: ESKA
in stock 0 pcs
(10/11/2024: 1000 pcs)
(10/25/2024: 3000 pcs)
(11/08/2024: 3000 pcs)
(11/22/2024: 1000 pcs)
(11/29/2024: 1000 pcs)
(12/06/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0862 £
0,0765 £
0,0703 £
0,0641 £
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522.523 5x20 T 4A (522523) ESKA  
522.523 5x20 T 4A (522523)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 4A 250VAC

Cartridge Fuses

Ord. No.: 319146
Manufacturer: ESKA
in stock 0 pcs
(10/11/2024: 1000 pcs)
(10/25/2024: 1000 pcs)
(11/08/2024: 2000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0904 £
0,0871 £
0,0779 £
0,0714 £
0,0653 £
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522.524 5x20 T 5A (522524) ESKA  
522.524 5x20 T 5A (522524)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 5A 250VAC

Cartridge Fuses

Ord. No.: 319147
Manufacturer: ESKA
in stock 0 pcs
(11/22/2024: 2000 pcs)
(12/06/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0862 £
0,0831 £
0,0740 £
0,0679 £
0,0636 £
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522.525 5x20 T 6,3A (522525) ESKA  
522.525 5x20 T 6,3A (522525)

Glass Body Cartridge Fuse 5x20mm Slow-Acting T 6,3A 250VAC

Cartridge Fuses

Ord. No.: 319076
Manufacturer: ESKA
in stock 6200 pcs
(10/25/2024: 2000 pcs)
(11/08/2024: 1000 pcs)
(11/22/2024: 1000 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0862 £
0,0831 £
0,0740 £
0,0679 £
0,0636 £
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522.725 K5x20 T 6,3A (522725) ESKA  
522.725 K5x20 T 6,3A (522725)

Ceramic Body Cartridge Fuse 5x20mm Slow-Acting T 6,3A 250VAC

Cartridge Fuses

Ord. No.: 50920
Manufacturer: ESKA
in stock 100 pcs
20 pcs+
40 pcs+
140 pcs+
700 pcs+
2820 pcs+
0,1231 £
0,1189 £
0,1072 £
0,0988 £
0,0904 £
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632.315 6,3x32 T 630mA (632315) ESKA  
632.315 6,3x32 T 630mA (632315)

Glass Body Cartridge Fuse 6,3x32mm Slow-Acting T 630mA 250VAC

Cartridge Fuses

Ord. No.: 319115
Manufacturer: ESKA
in stock 90 pcs
10 pcs+
20 pcs+
200 pcs+
400 pcs+
1600 pcs+
0,2118 £
0,2043 £
0,1733 £
0,1691 £
0,1583 £
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632.325 6,3x32 T 6,3A (632.325) ESKA  
632.325 6,3x32 T 6,3A (632.325)

Glass Body Cartridge Fuse with Sand 6,3x32mm Slow-Acting T 6,3A 250VAC

Cartridge Fuses

Ord. No.: 8221
Manufacturer: ESKA
in stock 80 pcs
10 pcs+
20 pcs+
200 pcs+
400 pcs+
1600 pcs+
0,2135 £
0,2068 £
0,1750 £
0,1708 £
0,1599 £
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632.617 6,3x32 F 1A (632617) ESKA  
632.617 6,3x32 F 1A (632617)

Glass Body Cartridge Fuse 6,3x32mm Fast-Acting F 1A 250VAC

Cartridge Fuses

Ord. No.: 319089
Manufacturer: ESKA
in stock 80 pcs
10 pcs+
20 pcs+
100 pcs+
500 pcs+
2500 pcs+
0,1666 £
0,1465 £
0,1306 £
0,1197 £
0,1089 £
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520.607 5x20 F 100mA (520607) ESKA  
520.607 5x20 F 100mA (520607)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 100mA 250VAC

Cartridge Fuses

Ord. No.: 156372
Manufacturer: ESKA
in stock 3800 pcs
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0938 £
0,0904 £
0,0804 £
0,0725 £
0,0675 £
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520.610 5x20 F 200mA (520610) ESKA  
520.610 5x20 F 200mA (520610)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 200mA 250VAC

Cartridge Fuses

Ord. No.: 319059
Manufacturer: ESKA
in stock 0 pcs
(10/11/2024: 200 pcs)
(10/25/2024: 300 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0807 £
0,0718 £
0,0659 £
0,0616 £
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520.614 5x20 F 500mA (520614) ESKA  
520.614 5x20 F 500mA (520614)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 500mA 250VAC

Cartridge Fuses

Ord. No.: 91572
Manufacturer: ESKA
in stock 0 pcs
(10/04/2024: 7970 pcs)
(10/11/2024: 3000 pcs)
(10/18/2024: 4330 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0807 £
0,0718 £
0,0659 £
0,0616 £
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520.619 5x20 F 1,6A (520619) ESKA  
520.619 5x20 F 1,6A (520619)

Glass Body Cartridge Fuse 5x20mm Fast-Acting F 1,6A 250VAC

Cartridge Fuses

Ord. No.: 319067
Manufacturer: ESKA
in stock 600 pcs
(11/29/2024: 500 pcs)
20 pcs+
40 pcs+
200 pcs+
1000 pcs+
4000 pcs+
0,0888 £
0,0807 £
0,0718 £
0,0659 £
0,0616 £
  • ADD TO CART
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