{"product_id":"mercury-5-x-20mm-f20a-quick-blow-fuses-pack-of-5","title":"Mercury 5 x 20mm F20A Quick Blow Fuses - Pack of 5","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Mercury F20A is a 5 x 20mm glass cartridge quick blow fuse rated at 20A and 250V, supplied in packs of five. Quick blow (fast-acting) fuses are designed to interrupt the circuit within milliseconds of an overcurrent event, providing protection for sensitive electronics, amplifiers, power supplies and AV equipment where rapid fault response is needed.\u003c\/p\u003e\n\u003cp\u003eDesigned for installation in fused IEC mains inlets, fuse holders, amplifier rear panels and power distribution units, the 5 x 20mm format is a standard size across audio, AV, lighting control and electrical equipment. The glass body allows visual inspection of the internal wire element, making it easy to identify a blown fuse without needing a multimeter.\u003c\/p\u003e\n\u003cp\u003eThe 20A rating handles equipment drawing up to 20 amps on a 250V supply before the fuse blows. The quick blow response time means the fuse interrupts the circuit faster than slow-blow or time-delay fuses, which are used in equipment that has high inrush currents on startup. The fuses meet IEC standards for safety and performance, ensuring consistent operation across different installations.\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between quick blow and slow blow fuses?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eQuick blow fuses interrupt the circuit within milliseconds of an overcurrent event. Slow blow (time-delay) fuses tolerate brief current surges on startup before blowing, making them suitable for motors and transformers. Quick blow fuses are used where immediate protection is needed for sensitive electronics.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat equipment uses 5 x 20mm fuses?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5 x 20mm format is common in audio amplifiers, DJ mixers, lighting controllers, power supplies, IEC mains inlets and distribution units. Check your equipment's manual or the existing fuse to confirm the size and rating before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a blown fuse with a higher-rated one?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Always replace a fuse with the same rating and type (quick blow vs slow blow) specified by the equipment manufacturer. Using a higher-rated fuse removes the protection the original fuse was designed to provide, risking damage to the equipment or fire hazard.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know if the fuse has blown?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe glass body allows you to see the internal wire element. A blown fuse will have a broken wire visible inside the glass tube, often with black discolouration on the glass itself.\u003c\/p\u003e","brand":"AVSL","offers":[{"title":"Default Title","offer_id":45313490125067,"sku":"787.273UK","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/787273UK_LB1_9ae86466-4c38-4e56-8949-452e6bad8acd.jpg?v=1715194294","url":"https:\/\/niori.co.uk\/products\/mercury-5-x-20mm-f20a-quick-blow-fuses-pack-of-5","provider":"Niori","version":"1.0","type":"link"}