{"product_id":"40a-single-pole-b-curve-mcb-miniature-circuit-breaker-for-residential-and-light-commercial-panels","title":"40A Single Pole B Curve MCB Miniature Circuit Breaker For Residential And Light Commercial Panels","description":"\u003cdiv\u003e\n\u003cp\u003e\nThis 40A Single Pole B Curve MCB is a compact, trustworthy overcurrent protection device designed for single-phase electrical circuits. It’s ideal for residential and light commercial panels where reliable, fast response to overloads and short circuits is essential.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCurrent rating\u003c\/b\u003e: 40A capacity for protecting branch circuits up to 40 amps in 1‑phase systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePole configuration\u003c\/b\u003e: Single Pole design for a single live conductor in a typical 1‑phase distribution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTripping curve\u003c\/b\u003e: B curve, delivering a fast instantaneous trip at 3–5 times the rated current to limit fault current exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProtection type\u003c\/b\u003e: Thermal‑magnetic mechanism providing protection against both overloads and short circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eApplication\u003c\/b\u003e: Suited for use in standard electrical panels and distribution boards in homes and light commercial settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis MCB helps minimize insulation wear, reduces the risk of electrical fires, and simplifies fault recovery. Its resettable design enables quick restoration after a fault, maintaining ongoing circuit safety with predictable, consistent performance.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Hager","offers":[{"title":"Default Title","offer_id":53423102099783,"sku":"MTN140","price":4.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/1156\/5895\/files\/695c7ee9-0002536_40a-single-pole-b-curve-mcb_415.png?v=1772219135","url":"https:\/\/electricallighting.co.uk\/products\/40a-single-pole-b-curve-mcb-miniature-circuit-breaker-for-residential-and-light-commercial-panels","provider":"Electrical Lighting ","version":"1.0","type":"link"}