{"product_id":"mercury-6-x-32mm-f20a-quick-blow-fuses-pack-of-6","title":"Mercury 6 x 32mm F20A Quick Blow Fuses - Pack of 6","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Mercury F20A is a 6 x 32mm quick blow fuse rated at 20A and 250V, designed to interrupt current within milliseconds when an overload or short circuit occurs. The glass body houses a fine wire element that melts instantly when current exceeds the 20A threshold, protecting connected equipment and wiring from thermal damage. Each pack contains six fuses.\u003c\/p\u003e\n\u003cp\u003eQuick blow fuses are used in applications where sensitive electronic components require immediate protection rather than delayed response. Typical installations include audio amplifiers, powered speakers, DJ equipment, PA systems, power supplies and control panels where a sustained overload could damage circuitry before a slower-acting fuse would break the circuit. The 6 x 32mm format fits standard IEC fuseholders and panel-mount fuse carriers.\u003c\/p\u003e\n\u003cp\u003eThe glass tube body allows visual inspection of the fuse element without removal from the holder — a blown fuse shows a broken wire or darkened glass from the arc. The metal end caps are nickel-plated for corrosion resistance and consistent contact pressure. The 250V rating suits UK mains-derived circuits and lower-voltage DC applications up to the rated voltage. These fuses meet IEC 60127 standards for miniature fuses.\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between quick blow and slow blow fuses?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eQuick blow fuses interrupt current within milliseconds of exceeding the rated amperage, protecting sensitive electronics from brief surges. Slow blow fuses tolerate short-term overloads (such as motor start-up current) and only break the circuit if the overload is sustained, making them suitable for inductive loads like transformers and motors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat current rating should I use?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe fuse rating should be chosen based on the normal operating current of the circuit or device being protected. A 20A fuse is typically used where the steady-state current is 15-18A, allowing a small safety margin. Installing a fuse rated significantly higher than the normal current reduces protection effectiveness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these fuses be used in DC circuits?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The 250V AC rating typically corresponds to approximately 250V DC capability, but DC arc suppression is different from AC. For critical DC applications above 48V, confirm the manufacturer's DC voltage rating before use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these fuses reusable?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Quick blow fuses are single-use devices. Once the element melts, the fuse must be replaced. Attempting to bypass or repair a blown fuse creates a fire risk and removes circuit protection.\u003c\/p\u003e","brand":"AVSL","offers":[{"title":"Default Title","offer_id":45313491435787,"sku":"787.342UK","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/787342UK_CO1_50750d9e-a23a-424b-89eb-8d3362b9462f.jpg?v=1715194354","url":"https:\/\/niori.co.uk\/products\/mercury-6-x-32mm-f20a-quick-blow-fuses-pack-of-6","provider":"Niori","version":"1.0","type":"link"}