Holding magnet Door Holding Magnets

platefor doorsexplosion-proof

Door holding magnets from Kendrion are electromagnetic locking devices used to keep fire barriers (fire doors, fire gates, fire valves) and conventional doors in an open state; they are released by disconnecting the power supply (e.g. via smoke switches) in case of fire.

Product range and applications

• SAFE Line: wide range of variants including base magnet, versions with mounting plate, plate+clamp, in-wall, on-wall, ground mounting, swivel heads (aluminium and plastic), distance-tube, explosion-proof and certified ship models.
• STANDARD Line: cost-efficient variants for universal applications with on-wall, swivel-head and universal designs.
• Accessories: keeper (armature) plates (standard, with angle adjustment, telescopic), brackets for wall and floor installation, circuit breakers (interrupter switches) for on-wall, in-wall and explosion-protected environments.

Key application features

• Designed primarily as hold-open devices for fire protection closures; must comply with applicable guidelines (e.g. DIBt where relevant).
• Also used for conventional doors in shops and entrance areas to hold doors open safely with low power consumption and high holding force.
• Variants available for ATEX (explosion protected) environments and maritime applications (DNV GL certified).

Benefits at a glance

• Design & functionality adapted to diverse mounting requirements
• VdS, CE, EN1155, DIN EN 14637 tested (depending on type)
• Variants for all applications (mounting, swivel heads, explosion-proof, maritime, position monitoring)

Technical Data (representative values)

• Supply voltage: 24 V DC
• Rated power: 1.4 - 90 W
• Holding force: 300 - 1,568 N (30 - 160 kg)
• Approvals (depending on type/product line): VdS, EN1155 CPD, CPR, DIN EN 14637, EN1155, CE, NF, ATEX, DNV GL
• Protection class (basic device): IP42, IP54, IP65
• Protection class (connection): up to IP65
• Accessories: brackets for wall and floor installation; armature (keeper) plates; circuit breaker
• Other features: manifold assembly and connection options; integrated inverse-polarity and spark-extinction diode; no remanence by push-off pin

Characteristics / Technical specifications

• Mounting options: wall, floor, ceiling; in-wall, on-wall and ground mounting variants available.
• Special designs: spring-damped variants for heavy doors; swivel heads (aluminium/plastic); distance tube versions for wall mounting.
• Safety & approvals: specific types tested and approved for fire-protection applications and certified variants available for maritime (DNV GL) and ATEX zones.
• Monitoring options: variants with integrated position monitoring (micro-switch) for function monitoring.
• Longstanding product history: Kendrion has manufactured door holding magnets since the late 1960s and provides a broad product range and accessories to meet varied installation requirements.