LCN Door Closers -Sentronic SEM 7800 Series Magnets

Sentronic SEM 7800 Series Magnets

Category: door holders | electric hold-opens | magnetic door holders...

MasterFormat: Doors and Frames | Hardware | Door Hardware

LCN Door Closers
11819 N. Pennsylvania Street
Carmel, IN 46032
Tel: (888) 925-2171

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Sentronic SEM 7800 Series Magnets

The Sentronic SEM 7800 Series are electrically controlled door-holding magnets.

The Sentronic® 7800 Series magnet releases when the fire alarm panel enters an alarm condition and the electrical current is interrupted, allowing the door to perform manually until power returns. The tri-voltage design provides 35 pounds of holding force. The magnet is fail-safe and will hold the door until the current is interrupted.

The SEM 7800 Series is protected by a 2-year warranty, meets ANSI/BHMA 156.15 and is UL Listed for metal smoke barrier or labeled fire doors. All magnets in the series feature die-cast housings and are available in aluminum and dark bronze finishes. The SEM 7820 is floor-mounted, the SEM 7830 is surface wall-mounted, the SEM 7840 is low-profile recessed wall-mounted and the SEM 7850 is standard-profile recessed wall-mounted. All magnets but the SEM 7820 are suitable for pocket door installation.

Features & Benefits

Body construction

  • Die cast housing
  • Choice of floor-mounted, recessed wall-mounted and surface-mounted wall magnets
  • Heavy-duty design

Quality and durability

  • Tri-voltage design provides 35 pounds of holding force
  • Magnets are fail-safe until the electrical current is interrupted
  • Performs manually under alarm conditions until power returns


  • Wood and machine screw pack fasteners
  • Armature extensions available
  • SEM 7830, 7840 and 7850 can be used in pocket door installations


  • Tested and certified under ANSI/BHMA A156.15
  • UL listed for metal smoke barrier or labeled fire doors

Designs & Finishes

  • Available in aluminum and dark bronze finishes
  • Standard die-cast cover

Mounting/Arm Options

The SEM 7800 Series can be floor-mounted (7820), surface wall-mounted (7830), low-profile recessed wall-mounted (7840), and standard profile recessed wall-mounted (7850). View the SEM 7800 catalog pages for mounting details and accessories.

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