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SEM 7800 Series Magnets
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The Sentronic® SEM 7800 Series are heavy duty, electrically controlled door holding magnets. Magnets are fail safe and hold until the current is interrupted. A manual door closer is used to control and close the door. A choice of floor, recessed wall, or surface mounted wall magnets are available.

All SEM series magnets are UL listed for smoke barrier or labeled fire doors. Tested and certified under ANSI Standard A156.15.

SEM 7820 Magnet Features
  • Tri-voltage design with 35lbs. of holding force
  • Floor-mounted
  • Now available armature extensions from LCN
  • SEM 7820 magnets are shipped with die cast housing, cover, armature(s) and WMS screw pack
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7820 available in Aluminum and Dark Bronze finishes

SEM 7830 Magnet Features

  • Tri-voltage design with 35lbs. of holding force
  • Surface wall-mounted
  • Now available armature extensions from LCN
  • SEM 7830 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7830 available in Aluminum and Dark Bronze finishes

SEM 7840 Magnet Features

  • Tri-voltage design with 35lbs. of holding force
  • Low profile recessed wall-mounted
  • Now available armature extensions from LCN
  • SEM 7840 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7840 available in Aluminum and Dark Bronze finishes

SEM 7850 Magnet Features

  • Tri-voltage design with 35lbs. of holding force
  • Standard profile recessed wall-mounted
  • Now available armature extensions from LCN
  • SEM 7850 magnets are shipped with die cast housing, cover, armature and WMS screw pack
  • Suitable for use in pocket door installations
  • UL listed for smoke barrier or labeled fire doors
  • SEM 7850 available in Aluminum and Dark Bronze finishes
Armatures
  • Door Armature, SEM7820-825, SEM7830-825, SEM7840-825, SEM7870-825 Standard, die cast low profile armature.
  • Door Armature, SEM7850-828 Standard, die cast armature.
  • Door Armature, SEM1960-825, SEM1970-825 Standard, plastic low profile armature.
  • Door Armature, SEM1980-828 Standard, plastic armature.

Extensions

  • Coupler Assembly Kit, SEM7810-514 Coupler assembly is required for each door needing extension(s). Kit includes coupler link and ball pivot (alone serves as a 1 1/2” extension).
  • Extension, SEM7810-E050 Standard metal 1/2” extension.
  • Extension, SEM7810-E075 Standard metal 3/4” extension.
  • Extension, SEM7810-E100 Standard metal 1” extension.
  • Extension, SEM7810-E200 Standard metal 2” extension.
  • Extension, SEM7810-E400 Standard metal 4” extension.
  • Extension Kit, SEM7810-517
    Extension kit includes:
    10. . . . . . . . 7810SEM-E050
    10. . . . . . . . 7810SEM-E075
    10. . . . . . . . 7810SEM-E100
    5. . . . . . . . 7810SEM-E200
    20. . . . . . . . 7810SEM-514

Note: Using just the ball link and connector link will create a 1 1/2” link. Extension Links are available in different lengths and can be combined together to achieve the desired length.

Electrical Data
Holding Force: 35lbs. @ Nominal Input Voltage.
Maximum Current Draw: .020A @ 24VAC/DC, 120VAC .030A @ 12VDC

Magnets
  • Floor Magnet, SEM7820-516, SEM7870-516 Standard magnet coil
  • Wall Magnet, SEM7830-516, SEM7840-516, SEM7850-516, SEM1960-516, SEM1970-516, SEM1980-516 Standard magnet coil

Cover

  • Standard Cover, SEM7830-72, SEM7840-72, SEM7850-72 Standard, die cast cover.
  • Standard Cover, SEM1960-72, SEM1970-72, SEM1980-72 Standard, plastic cover.

Box

  • Wall Box, SEM7830-268 Standard, die cast surface wall mount box
  • Wall Box, SEM1960-268 Standard, plastic surface wall mount box