{"product_id":"siemens-sentron-5sd74-surge-arresters-type-1-2-3-busbar","title":"Siemens SENTRON 5SD74 surge arresters type 1+2+3 for 40 mm busbar","description":"\u003cp class=\"ps-intro\"\u003eSENTRON 5SD74 type 1 + type 2 + type 3 surge arresters for direct mounting on 40 mm busbar systems, with remote signaling and optional phase tap.\u003c\/p\u003e\u003ch4 class=\"ps-h\"\u003eKey features\u003c\/h4\u003e\u003cul class=\"ps-feat\"\u003e\n\u003cli\u003eType 1 + 2 + 3 protection in one device\u003c\/li\u003e\n\u003cli\u003eAdapter for 40 mm busbar systems, 47 mm width\u003c\/li\u003e\n\u003cli\u003eLightning impulse current 12.5 kA or 7.5 kA (10\/350 us)\u003c\/li\u003e\n\u003cli\u003eRemote signaling, versions with phase tap\u003c\/li\u003e\n\u003cli\u003eFor TN-C (3+0) and TN-S\/TT (3+1) systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4 class=\"ps-h\"\u003eSpecifications\u003c\/h4\u003e\u003ctable class=\"ps-kv\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSiemens SENTRON\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e5SD74\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSPD type\u003c\/th\u003e\n\u003ctd\u003eType 1 + type 2 + type 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated voltage Un\u003c\/th\u003e\n\u003ctd\u003e240\/415 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax. continuous voltage Uc\u003c\/th\u003e\n\u003ctd\u003e300 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e47 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRemote signaling\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSource\u003c\/th\u003e\n\u003ctd\u003eSiemens Catalog LV 10 · 2026, p. 514-515\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ctable class=\"ps-src\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7443-8KK21\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-C | Protection paths: L-PEN | Circuit: 3 + 0 | Iimp (10\/350 us): 12.5 kA | Phase tap: No\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7443-8KK22\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-C | Protection paths: L-PEN | Circuit: 3 + 0 | Iimp (10\/350 us): 12.5 kA | Phase tap: Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7443-8KK11\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-C | Protection paths: L-PEN | Circuit: 3 + 0 | Iimp (10\/350 us): 7.5 kA | Phase tap: No\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7443-8KK12\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-C | Protection paths: L-PEN | Circuit: 3 + 0 | Iimp (10\/350 us): 7.5 kA | Phase tap: Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7444-8KK21\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Circuit: 3 + 1 | Iimp (10\/350 us): 12.5 kA | Phase tap: No\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7444-8KK22\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Circuit: 3 + 1 | Iimp (10\/350 us): 12.5 kA | Phase tap: Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7444-8KK11\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Circuit: 3 + 1 | Iimp (10\/350 us): 7.5 kA | Phase tap: No\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e5SD7444-8KK12\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem: TN-S and TT | Protection paths: L-N, L-PE and N-PE | Circuit: 3 + 1 | Iimp (10\/350 us): 7.5 kA | Phase tap: Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":67535327166754,"sku":"5SD7443-8KK21","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1021\/0744\/7586\/files\/siemens-sentron-5sd74-surge-arresters-type-1-2-3-busbar.jpg?v=1792150078","url":"https:\/\/prosourcemro.com\/products\/siemens-sentron-5sd74-surge-arresters-type-1-2-3-busbar","provider":"ProSource MRO","version":"1.0","type":"link"}