{"title":"Seco-Larm","description":null,"products":[{"product_id":"seco-larm-dh-171sq","title":"Seco-Larm DH-171SQ Magnetic Door Holder Flush-Mount","description":"\u003ch2\u003eSeco-Larm DH-171SQ Magnetic Door Holder Flush-Mount, UL Listed\u003c\/h2\u003e\u003cdiv class=\"ths-mfr-data\"\u003e\n\u003cp\u003eUL Listed flush-mount electromagnetic door holder for remote door release in residential, commercial and public buildings. It is used with a door closer to hold a door open and release it when power is removed. The tri-volt coil works on 12 or 24 VAC\/VDC or 120 VAC and the armature plate is adjustable for door alignment.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFail-safe operation\u003c\/li\u003e\n\u003cli\u003eThree selectable voltages: 12 VAC\/VDC, 24 VAC\/VDC, 120 VAC (factory preset at 120 V)\u003c\/li\u003e\n\u003cli\u003eAdjustable armature plate\u003c\/li\u003e\n\u003cli\u003eLow-profile design with cast aluminum faceplate\u003c\/li\u003e\n\u003cli\u003eNo residual magnetism\u003c\/li\u003e\n\u003cli\u003eBuilt-in voltage spike suppressor\u003c\/li\u003e\n\u003cli\u003eOptional extension bars: 3\/4\", 1\", 4\", 7\"\u003c\/li\u003e\n\u003cli\u003e5-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"ths-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eOperating voltage\u003c\/th\u003e\n\u003ctd\u003e12 VAC\/VDC, 24 VAC\/VDC, 120 VAC (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCurrent draw\u003c\/th\u003e\n\u003ctd\u003e52 mA @ 12 VAC, 60 mA @ 12 VDC; 27 mA @ 24 VAC, 31 mA @ 24 VDC; 24 mA @ 120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eHolding force\u003c\/th\u003e\n\u003ctd\u003e33 lb (15 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMounting type\u003c\/th\u003e\n\u003ctd\u003eFlush-mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eManual release\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMagnet dimensions\u003c\/th\u003e\n\u003ctd\u003e2-3\/4\" x 4-9\/16\" x 2-1\/16\" (70 x 116.5 x 52 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eArmature dimensions\u003c\/th\u003e\n\u003ctd\u003e2-9\/16\" dia. x 1-9\/16\" (65 x 40 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eMagnet 1 lb 1.6 oz (498 g); armature 8.4 oz (237 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eCompatible With\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSECO-LARM door closers SD-C121-S, SD-C131-SQ, SD-C101-SGQ, SD-C101-SBAQ\u003c\/li\u003e\n\u003cli\u003eExtension bars DH-100E-07SQ, DH-100E-10SQ, DH-100E-40SQ, DH-100E-70SQ\u003c\/li\u003e\n\u003cli\u003eArmature plate DH-100A-01SQ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDocuments \u0026amp; Downloads\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.seco-larm.com\/wp-content\/uploads\/2026\/07\/PI_DH-1xxxx_260722.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDH-1xxxx Magnetic Door Holders Product Information Sheet\u003c\/a\u003e (Data Sheet)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.seco-larm.com\/wp-content\/uploads\/2026\/07\/MI_DH-1xxxx_250710_V260724.pdf\" target=\"_blank\" rel=\"noopener\"\u003eDH-1xxxx Magnetic Door Holders Manual\u003c\/a\u003e (Installation Manual)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Seco-Larm","offers":[{"title":"Default Title","offer_id":48539615002848,"sku":"DH-171SQ","price":146.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0653\/7186\/5312\/files\/3_DH_171SQ_220622_1440x1440-600x600_png.webp?v=1768642748"}],"url":"https:\/\/thefirealarmsupplier.com\/collections\/seco-larm.oembed","provider":"The Fire Alarm Supplier","version":"1.0","type":"link"}