{"title":"High-Quality Magnetic Door Holders \u0026 Retainers","description":"\u003cp\u003eEnsure your premises are safe, accessible, and fully compliant with our professional range of \u003cb data-path-to-node=\"9\" data-index-in-node=\"94\"\u003emagnetic door holders\u003c\/b\u003e. Designed to hold heavy fire doors open during everyday use, these electromagnetic retainers are wired to your building's fire alarm system. In the event of an emergency, the power is cut, releasing the doors to prevent the spread of smoke and fire. Browse our selection of wall-mounted and floor-mounted door holders below to find the perfect fit for your security and safety needs.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cb data-path-to-node=\"13\" data-index-in-node=\"0\"\u003eReliable Electromagnetic Door Holders for Every Environment\u003c\/b\u003e Whether you are managing a school, hospital, office building, or care home, maintaining a safe and accessible environment is a top priority. Standard door wedges are a major fire hazard and illegal when used on fire doors. Our \u003cb data-path-to-node=\"13\" data-index-in-node=\"291\"\u003eelectromagnetic door holders\u003c\/b\u003e provide a legal, safe, and highly effective alternative.\u003c\/p\u003e\n\u003cp data-path-to-node=\"14\"\u003eBy integrating seamlessly with your existing fire alarm or door entry systems, our door retainers allow high-traffic corridors to remain open, improving ventilation and accessibility for wheelchair users, while ensuring doors close automatically when the alarm sounds.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"15\"\u003e\u003cb data-path-to-node=\"15\" data-index-in-node=\"0\"\u003eTypes of Magnet Door Holders We Supply\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"15\"\u003eWe stock a variety of door retainers to suit different installation requirements and door weights:\u003c\/p\u003e\n\u003cul data-path-to-node=\"16\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,0,0\"\u003e\u003cb data-path-to-node=\"16,0,0\" data-index-in-node=\"0\"\u003eWall-Mounted Magnetic Holders:\u003c\/b\u003e The most popular choice, easily installed onto the wall behind the door. Ideal for standard corridors and office spaces.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,1,0\"\u003e\u003cb data-path-to-node=\"16,1,0\" data-index-in-node=\"0\"\u003eFloor-Mounted Magnetic Holders:\u003c\/b\u003e Perfect for situations where wall mounting isn't possible (e.g., glass partitions or doors that open into large, open spaces).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"16,2,0\"\u003e\u003cb data-path-to-node=\"16,2,0\" data-index-in-node=\"0\"\u003eHeavy-Duty Retainers:\u003c\/b\u003e Designed with higher holding forces (measured in Newtons\/N) to securely hold heavy, oversized, or high-tension fire doors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-path-to-node=\"17\"\u003e\u003cb data-path-to-node=\"17\" data-index-in-node=\"0\"\u003eFully Compliant Fire Safety (BS EN 1155)\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"17\"\u003eWhen it comes to fire safety, cutting corners is not an option. The magnetic door stops we supply at Door Entry Online are rigorously tested and manufactured to meet strict UK and European safety standards, including \u003cb data-path-to-node=\"17\" data-index-in-node=\"262\"\u003eBS EN 1155\u003c\/b\u003e. This guarantees that the electromagnet will reliably release the door the moment your fire alarm system is triggered or in the event of a power failure, ensuring your fire compartments remain uncompromised.\u003c\/p\u003e\n\u003ch2 data-path-to-node=\"18\"\u003e\u003cb data-path-to-node=\"18\" data-index-in-node=\"0\"\u003eWhy Choose Door Entry Online?\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp data-path-to-node=\"18\"\u003eAt Door Entry Online, we specialise in providing top-tier access control and door hardware to both trade professionals and the general public.\u003c\/p\u003e\n\u003cul data-path-to-node=\"19\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"19,0,0\"\u003e\u003cb data-path-to-node=\"19,0,0\" data-index-in-node=\"0\"\u003eExpert Support:\u003c\/b\u003e Not sure which holding force you need? Our technical team is here to help.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"19,1,0\"\u003e\u003cb data-path-to-node=\"19,1,0\" data-index-in-node=\"0\"\u003eFast UK Delivery:\u003c\/b\u003e Get your access control components exactly when you need them.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"19,2,0\"\u003e\u003cb data-path-to-node=\"19,2,0\" data-index-in-node=\"0\"\u003eTrusted Brands:\u003c\/b\u003e We only stock highly reliable, tested products built for longevity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"20\"\u003e\u003cb data-path-to-node=\"20\" data-index-in-node=\"0\"\u003eFrequently Asked Questions (FAQs)\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp data-path-to-node=\"21\"\u003e\u003cb data-path-to-node=\"21\" data-index-in-node=\"0\"\u003eHow does a magnetic fire door holder work?\u003c\/b\u003e The holder consists of an electromagnet (usually fitted to a wall or floor) and an armature plate (fitted to the door). When powered, the magnet holds the plate, keeping the door open. It is wired directly to the building's fire alarm system; if the alarm goes off, the power to the magnet drops out, and the door's mechanical closer shuts it.\u003c\/p\u003e\n\u003cp data-path-to-node=\"22\"\u003e\u003cb data-path-to-node=\"22\" data-index-in-node=\"0\"\u003eCan I use a magnetic holder on any fire door?\u003c\/b\u003e Yes, provided the door is equipped with a functional overhead door closer and the magnetic holder is properly wired into the fire detection system.\u003c\/p\u003e\n\u003cp data-path-to-node=\"23\"\u003e\u003cb data-path-to-node=\"23\" data-index-in-node=\"0\"\u003eWhat holding force do I need?\u003c\/b\u003e Standard internal doors usually require a holding force of around 200N (Newtons). For heavier doors, high-traffic areas, or areas prone to strong drafts, a 400N or 500N holder may be required.\u003c\/p\u003e","products":[{"product_id":"magnetic-lock-gd870-gd970","title":"Magnetic Lock GD870S","description":"\u003ch3\u003eGD870S Wall\/Surface Mounted Door Holder\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e The GD870S is a wall or surface-mounted electromagnetic door holder equipped with a manual test button.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e Selectable 12V DC or 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolding Force:\u003c\/strong\u003e 45kg (100lbs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e125mA @ 12V DC\u003c\/li\u003e\n\u003cli\u003e60mA @ 24V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 80mm (H) x 80mm (W) x 65mm (D)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Troubleshooting\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the magnet running warm or hot?\u003c\/strong\u003e It is normal for \"power to lock\" devices to feel warm, as they require constant power to operate. However, excessive heat can be caused by:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncorrect Voltage:\u003c\/strong\u003e Supplying 24V DC to a magnet configured for 12V DC operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsufficient Amperage:\u003c\/strong\u003e The power supply is not providing enough current, causing electrical resistance and heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Drop:\u003c\/strong\u003e Using a long cable run with an inadequate wire gauge can reduce the current reaching the magnet, causing it to run hot.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the armature plate vibrating?\u003c\/strong\u003e Vibration is typically caused by:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA faulty or underrated power supply.\u003c\/li\u003e\n\u003cli\u003ePowering a 24V DC magnet with a 12V DC supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy won't the magnet lock properly, allowing the door to be pulled open easily?\u003c\/strong\u003e Common causes for a weak lock include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMisalignment:\u003c\/strong\u003e The armature plate is not correctly aligned with the magnet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Issues:\u003c\/strong\u003e The power supply is faulty, underrated, or you are using a 12V DC supply for a magnet set to 24V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify Wiring:\u003c\/strong\u003e Before powering on, double-check that the wiring connections match your chosen power supply (12V DC or 24V DC). Failure to do so can cause the magnet to overheat or fail to lock, eventually damaging the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Periodically clean the surfaces of both the magnet and the armature plate with a light oil to ensure optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Magnetic Lock\u003c\/li\u003e\n\u003cli\u003e1 x Armature Plate\u003c\/li\u003e\n\u003cli\u003e1 x Fixing Kit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Door Entry Online","offers":[{"title":"Default Title","offer_id":56327173800200,"sku":"GD970","price":53.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/8294\/9896\/files\/door-holder-magnet-gd870S.jpg?v=1780060289"},{"product_id":"magnetic-lock-gd830f-gd830f","title":"Magnetic Lock GD870F","description":"\u003ch2\u003eGD870F Floor-Mounted Door Holder\u003c\/h2\u003e\n\u003cp\u003eThe GD870F is a floor-mounted magnetic door holder equipped with a convenient test button.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e 12V DC or 24V DC (selectable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolding Force:\u003c\/strong\u003e 45kg (100lbs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e 125mA @ 12V DC | 60mA @ 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (mm):\u003c\/strong\u003e 105 (H) x 103 (W) x 70 (D)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Troubleshooting\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the magnet running hot?\u003c\/strong\u003e \"Power to Lock\" devices like magnetic locks can become warm during normal operation due to the constant power they require. However, excessive heat is often caused by:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncorrect Voltage:\u003c\/strong\u003e Supplying 24V DC to a magnet set for 12V DC operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsufficient Amperage:\u003c\/strong\u003e The power supply is not providing enough current, causing the magnet to heat up as it struggles to maintain its hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Drop:\u003c\/strong\u003e Using an inadequate wire gauge over a long cable run can reduce the current reaching the magnet, leading to overheating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the armature plate vibrating?\u003c\/strong\u003e This is typically due to one of the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA faulty or underrated power supply.\u003c\/li\u003e\n\u003cli\u003eThe magnet is set for 24V DC operation, but the power supply is only 12V DC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy won't the magnet lock properly?\u003c\/strong\u003e If the door can be pulled open easily, the most common causes are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncorrect alignment between the armature plate and the magnetic lock.\u003c\/li\u003e\n\u003cli\u003eA faulty or underrated power supply.\u003c\/li\u003e\n\u003cli\u003eA voltage mismatch (e.g., a 24V DC magnet with a 12V DC power supply).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify Wiring:\u003c\/strong\u003e This magnetic lock operates on either 12V DC or 24V DC. Before powering on, double-check that the wiring connections match your selected power supply (12V or 24V). Failure to do so can cause the lock to overheat or fail to engage, potentially damaging the system over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e Periodically clean the surfaces of both the magnet and the armature plate using a light oil to ensure optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Magnetic Lock\u003c\/li\u003e\n\u003cli\u003e1 x Armature Plate\u003c\/li\u003e\n\u003cli\u003e1 x Fixing Kit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Door Entry Online","offers":[{"title":"Default Title","offer_id":56327177142536,"sku":"GD830F","price":53.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/8294\/9896\/files\/gd830f.jpg?v=1780062676"},{"product_id":"magnetic-lock-gd830s-gd830s","title":"Magnetic Lock GD830S","description":"\u003ch2\u003eGD830S Wall\/Surface Mounted Door Holder\u003c\/h2\u003e\n\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe GD830S is a versatile magnetic door holder designed for either wall or surface mounting. It includes a convenient test button for easy operation checks.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Wall or surface mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Input:\u003c\/strong\u003e Selectable 12V DC or 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolding Force:\u003c\/strong\u003e 45kg (100lbs)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Draw:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e125mA @ 12V DC\u003c\/li\u003e\n\u003cli\u003e60mA @ 24V DC\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 65mm (H) x 90mm (W) x 31mm (D)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQs \u0026amp; Troubleshooting\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the magnet running warm or hot?\u003c\/strong\u003e \"Power to Lock\" devices require constant power and can naturally run warm. However, excessive heat is usually caused by:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Mismatch:\u003c\/strong\u003e A 12V DC magnet is being powered by a 24V DC supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsufficient Amperage:\u003c\/strong\u003e The power supply does not provide enough amperage, causing electrical resistance and heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Drop:\u003c\/strong\u003e A long cable run with an inadequate wire gauge is preventing sufficient current from reaching the magnet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is the armature plate vibrating?\u003c\/strong\u003e This typically points to an issue with the power supply. The cause is either a faulty\/under-rated power supply or a voltage mismatch (e.g., a 24V DC magnet receiving only 12V DC).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy won't the magnet lock properly?\u003c\/strong\u003e If the door can be pulled open easily, check the following:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eMisalignment:\u003c\/strong\u003e The armature plate and the magnet are not correctly aligned.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Issues:\u003c\/strong\u003e The power supply is faulty, under-rated, or there is a voltage mismatch (e.g., a 24V DC magnet receiving only 12V DC).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eTech Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify Wiring:\u003c\/strong\u003e This magnetic lock supports both 12V DC and 24V DC. Before powering on, double-check that the wiring connections match your power supply's voltage. Failure to do so can cause the lock to overheat, fail to engage properly, and eventually damage the system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance:\u003c\/strong\u003e To ensure optimal performance, periodically clean the surfaces of both the magnet and the armature plate with a light oil.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Magnetic Lock\u003c\/li\u003e\n\u003cli\u003e1 x Armature Plate\u003c\/li\u003e\n\u003cli\u003e1 x Fixing Kit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Door Entry Online","offers":[{"title":"Default Title","offer_id":56327178289416,"sku":"GD830S","price":53.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/8294\/9896\/files\/door-holder-magnet-gd830S.jpg?v=1780062770"}],"url":"https:\/\/www.doorentryonline.co.uk\/collections\/magnet-door-holders.oembed","provider":"Door Entry Online","version":"1.0","type":"link"}