{"product_id":"mercury-5-x-20mm-f3-15a-quick-blow-fuses-250v-glass","title":"Mercury 5 x 20mm F3.15A Quick Blow Fuses - 250V Glass","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Mercury F3.15A is a 5x20mm quick blow fuse housed in a clear glass tube with nickel-plated brass end caps. Rated at 250V, the fuse uses a thin wire element that melts rapidly when current exceeds 3.15A, interrupting the circuit before sensitive components can be damaged. Quick blow fuses respond faster than time-delay or slow-blow types, making them suited to circuits where transient spikes are rare and immediate protection is needed.\u003c\/p\u003e\n\u003cp\u003eThese fuses fit standard 5x20mm clips and holders in consumer electronics, mains-powered audio equipment, small power supplies, bench multimeters, and low-current appliances where over-current protection is required by design or regulation. The 3.15A rating sits between the more common 2A and 5A sizes, providing closer protection margins for circuits drawing 2-2.8A under normal load.\u003c\/p\u003e\n\u003cp\u003eThe clear glass tube allows visual inspection of the wire element — if the fuse has blown, the break in the wire is visible without needing a continuity tester. The nickel-plated end caps resist corrosion in humid environments and maintain good contact with spring-loaded clips. Each fuse is manufactured to IEC 60127 standards, ensuring consistent breaking capacity and dimensional accuracy across production batches.\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does 'quick blow' mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eQuick blow (or fast-acting) fuses respond immediately to over-current conditions without intentional time delay. The thin wire element melts within milliseconds once the rated current is exceeded, providing rapid protection for sensitive circuits that cannot tolerate brief over-current spikes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this replace a slow-blow fuse of the same rating?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Slow-blow (time-delay) fuses are designed to tolerate brief inrush currents during motor start-up or capacitor charging. Using a quick blow fuse in place of a slow-blow will result in nuisance blowing during normal operation. Always replace with the same fuse type specified by the equipment manufacturer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat voltage is it rated for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis fuse is rated at 250V, meaning it can safely interrupt a circuit operating at up to 250V AC or DC. Using it in higher-voltage circuits risks arcing or failure to interrupt the fault.\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 clear glass tube allows you to visually inspect the wire element inside. If blown, you'll see a visible break in the wire or a dark scorch mark on the glass. If the element appears intact, test with a continuity meter to confirm.\u003c\/p\u003e","brand":"AVSL","offers":[{"title":"Default Title","offer_id":45313488847115,"sku":"787.265UK","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/787265UK_LB1_50a0f001-5cc8-4e99-a64a-c356d2385dde.jpg?v=1715194268","url":"https:\/\/niori.co.uk\/products\/mercury-5-x-20mm-f3-15a-quick-blow-fuses-250v-glass","provider":"Niori","version":"1.0","type":"link"}