Authorized Seco-Larm Reseller

Seco-Larm SD-998C-D3AQ 1/2″ Tamper-Resistant Electric Rim Strike

Seco-LarmSKU: SD-998C-D3AQ

Sale price$242.46
Usually ships within 3-5 business days
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The SECO-LARM Surface-Mount Electric Rim Strike designed with the strength and durability for use with rim-type exit devices with a Pullman latch bolt (1/2″ throw). The strike features 12/24 VDC operating voltage, selectable fail-safe/fail-secure operation, horizontal adjustment, and a surface-mount metal housing, eliminating the need for frame cutting during installation.

  • UL 294 and 1034 Listed
  • Tamper-resistant
  • 12/24 VDC Operating voltage
  • Non-polarized connection
  • Horizontal adjustment
  • Accommodates up to 3/4″ Pullman latch
  • Reversible non-handed design
  • Stainless steel construction
  • Surface-mount on metal or wood frames
  • Works with standard rim-type exit devices including SECO-LARM SD-962AR-36A and SD-962AR-36G
  • For Indoor Use Only
  • Static strength – 1,500-lb (6673N)
  • Tested for 250,000 cycles (UL Tested)
  • Low current draw: 540mA@12VDC, 270mA@ 24VDC
  • Field-selectable for fail-safe or fail-secure operation
  • Spacers included: 1x-1/16″, 2x-1/8″ (1.5mm, 3mm)
  • The SD-998C series is intended to be used with UL Listed Exit Hardware
  • The SD-998C series shall not impair the intended operation of an emergency unit
  • The SD-998C series shall not impair the operation of panic hardware mounted on the door



Operating Voltage 12/24 VDC
Current Draw 540mA@12VDC , 270mA@24VDC
Latch Throw 1/2″
Static Strength 1,500-lb (6673N)
Dynamic strength 70ft-lb (95J)
Endurance 250,000 cycles (UL Tested), Level IV
Destructive attack Level I
Line security Level I
Standby power Level I
Operating Temperature 14°~120° F (-10°~49° C)
Operating Humidity 0~85%
Dimensions 9″x1-3/4″x1/2″ (229x45x13 mm)



Electric strike does not activate
  • Dismount the strike and check that the wiring connector is connected properly.
  • Ensure the wiring connector is connected to a 12 or 24VDC source.
  • Use a multimeter to test that the strike is receiving the proper voltage and amperage. If it is not, it may be necessary to use heavier gauge wires, or increase the output of the power supply.
  • Make sure the activation device (keypad or push-button switch) is working properly.
Door does not open when the electric strike is activated
  • Check that the door latch is operating properly, and replace if necessary.
  • The position of the electric strike may need to be adjusted by moving it or adding washers or shims.
Strike makes a buzzing sound
  • Connect the strike to a DC power supply.

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