5×20 mm Hitro (Počasi) Cevne varovalke z vodniki

The 520 fuse is a cylindrical glass or ceramic fuse tube with a diameter of 5mm and a length of 20mm. The rated voltage is usually 250V, and the current ranges from 0.1A to 30A.

There are two main types of 5*20 varovalke: fast-blow type (F vrsta) and slow-blow type (T vrsta). Fast-blow type is suitable for general electronic equipment, while slow-blow type is suitable for equipment with large starting current such as motors. The current specifications are very wide, ranging from the smallest 0.1A to the largest 30A.

F5AL Fast-Blow Fuse 5A 250V Glass Fuses 0.2 x 0.79 palec, 5 x 20 mm (5amp)

2250 V 5 mm x 20 mm hitro delujoča varovalka iz steklene cevi

5 * 20mm Axial Glass fuse tube With Lead Wire size picture

Glede scenarijev uporabe, ta vrsta varovalke se pogosto uporablja v gospodinjskih aparatih, industrijska oprema, avtomobilska elektronika in druga področja. Parametri, na katere je treba biti pozoren pri nakupu, vključujejo nazivni tok, nazivna napetost, lastnosti zlivanja (hitro ali počasi), in standardi certificiranja (kot je UL, CSA, VDE, itd.).

There are also different types of 5*20 fuse holders, such as direct plug-in type, waterproof type with leads, and PCB mounting type. Waterproof fuse holders are suitable for harsh environments such as outdoor lighting. The current carrying capacity of the fuse holder is usually 6-10A, and can reach up to 30A.

5*20 fuse is a standard size (5mm premer, 20mm length) cylindrical circuit protection component, mainly used for overcurrent protection. The following is its core characteristics and application information:

I. Basic specifications and types
‌Size standard‌
Unified cylindrical design with a diameter of 5mm×length of 20mm, glass or ceramic package, and metal cap electrodes at both ends. ‌
Steklena cev: transparent and visible, easy to observe the fuse status (common in low-voltage household appliances).
Keramična cev: strong high temperature resistance, suitable for industrial environments. ‌

‌Current and voltage range‌
Nazivna napetost: mainstream is 250V, and some models support 125V. ‌
Trenutni razpon: Covering ‌0.1A~30A‌, common segments include:
‌Small current‌ (≤1A): 0.1A, 0.2A, 0.25A, 0.5A, 1A (precision instruments, LED osvetlitev);
‌Medium and high current‌ (>1A): 2A, 3A, 5A, 10A, 15A, 20A, 30A (power supply equipment, motor);

‌Fusing characteristics‌ ‌Fast-break type (F vrsta): Quick response, suitable for sensitive electronic equipment (marked such as F1A, F5A). ‌
Počasen tip (T vrsta): Resistant to instantaneous current shock, primeren za motorje in transformatorje (marked such as T2A, T10A). ‌

5 * 20mm Axial Glass fuse tube Fast Blow 250V With Lead Wire 0.5A/1A/2A/3A/3.15A/4A/5A/6.3A/8A/10A/12A/15A

5 * 20mm Axial Glass Fuse Quick Fast Break 250V with Lead Wire 0.5A-25A

520S-250mA .25A 250V Slow Blow 5 x 20 Kartušna varovalka

Ii. Key parameters and certifications ‌

Electrical performance‌ ‌Breaking capacity‌: 35A@250V (low current model) to 200A@250V (high current model), zagotavljanje varnega odklopa v primeru kratkega stika. ‌
Prilagodljivost na temperaturo: Working temperature ‌-55℃~125℃‌, passed the hot and cold shock test (-40℃~90℃ cycle). ‌

‌Safety certification‌
Mainstream products have passed ‌UL, CSA, CCC, VDE, RoHS‌ certification and meet international safety standards. ‌

🛠️ III. Application scenarios and accessories ‌Typical applications‌
Gospodinjski aparati: power adapter, small appliance circuit board (commonly used 1A~5A). ‌
Industrijska oprema: servo pogon, napajalni modul (commonly used 10A~30A). ‌
‌Outdoor equipment‌: vodotesno držalo za varovalke (IP67 razred) for street lights and vehicle-mounted equipment. ‌

Ustrezno držalo varovalke
‌Vrsta namestitve PCB‌: straight leg/bent leg design (such as PTF-77), supporting 10A~20A current. ‌
‌Waterproof lead type‌: with PVC sheath and nickel-plated brass terminals (kot je H3-520E), suitable for harsh environments. ‌

💡 IV. Purchase recommendations ‌Current matching‌
Select according to 1.5 times the maximum operating current of the circuit (na primer: the maximum current of the circuit is 2A → select a 3A fuse). ‌
‌Motor type‌: Prefer slow-break type (T) to avoid false fuse at startup. ‌Digital circuit‌: Select fast-break type (F) to enhance overcurrent response. ‌
‌Certification and reliability‌
Confirm that the product has the ‌UL/CCC‌ mark to avoid uncertified brands (high safety risks). ‌

‌Purchase channels‌
Bulk purchase: Yaxun Electronics’ 1688 platform ($0.02/kos, 100 kosov najmanj) ‌
Retail replacement: Yaxun Electronics’ JD/Tmall (približno $0.5 za 10 pieces). ‌

💎 Povzetek
5*20 fuse is the basic protection component of electronic circuits. The selection needs to be based on current demand, fusing characteristics and environmental conditions. Give priority to brand products with complete certifications (such as Litte and Huade), and match them with corresponding fuse holders to ensure stable installation. ‌ For industrial or outdoor scenes, be sure to choose waterproof and high temperature resistant models to ensure long-term reliability.