{"product_id":"mercury-5-x-20mm-t10a-slow-blow-fuse-250v-iec-approved","title":"Mercury 5 x 20mm T10A Slow Blow Fuse - 250V IEC Approved","description":"\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cp\u003eThe Mercury T10A is a 5 x 20mm glass cartridge fuse rated at 10A and 250V, designed as a slow blow (time-delay) fuse for circuits where initial surge current is normal but sustained overload must be interrupted. The glass body contains a fusible element that tolerates brief current spikes without melting, then blows cleanly when sustained overload exceeds the 10A rating.\u003c\/p\u003e\n\u003cp\u003eSlow blow fuses suit motors, transformers, switch-mode power supplies and other inductive loads that draw a high inrush current on startup before settling to a lower running current. A fast-blow fuse would trip unnecessarily on startup; a slow blow fuse allows the surge, then protects the circuit during continuous operation. The 5 x 20mm cartridge fits standard panel-mount and PCB-mount fuse holders, and is a common replacement size in audio amplifiers, lighting control circuits and low-voltage power distribution boards.\u003c\/p\u003e\n\u003cp\u003eThe fuse is manufactured to IEC standards, ensuring consistent blow characteristics and predictable performance under fault conditions. Each fuse is marked with the T10A rating on the metal end caps, allowing quick identification when replacing. The transparent glass body allows visual inspection of the fusible element to confirm whether the fuse has blown.\u003c\/p\u003e\n\u003ch5\u003eFrequently Asked\u003c\/h5\u003e\n\u003cp\u003e\u003cstrong\u003eWhat does \"slow blow\" mean?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSlow blow (also called time-delay) means the fuse tolerates brief current surges above its rating without blowing. This suits circuits where inrush current on startup is normal, such as motors or transformers. A sustained overload above 10A will still blow the fuse within seconds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat voltage is it rated for?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe fuse is rated at 250V. It can be used in circuits up to 250V AC or DC, including standard UK 230V mains-fed equipment and lower-voltage distribution circuits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit my fuse holder?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 5 x 20mm cartridge is a standard size that fits most panel-mount and PCB-mount fuse holders rated for this dimension. Measure your existing fuse to confirm it's 5mm diameter and 20mm long.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many fuses are in the pack?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePack quantity depends on the SKU variant. Check the product title or specification table for the exact quantity supplied.\u003c\/p\u003e","brand":"AVSL","offers":[{"title":"Default Title","offer_id":45313486815499,"sku":"787.020UK","price":1.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0729\/8993\/3835\/files\/787020UK_LB1_acdd3491-4e7f-44bc-9962-86647ce2bf32.jpg?v=1715194156","url":"https:\/\/niori.co.uk\/products\/mercury-5-x-20mm-t10a-slow-blow-fuse-250v-iec-approved","provider":"Niori","version":"1.0","type":"link"}