Authorized Seco-Larm Reseller

Seco-Larm E-941SA-300 300-lb Electromagnetic Lock, Indoor / Outdoor

Seco-LarmSKU: E-941SA-300

Sale price$78.95
Usually ships within 3-5 business days

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The E-941SA series of electromagnetic locks is the ideal way to secure a door against unauthorized entry. When power is applied to the electromagnetic lock, it creates an extremely strong magnetic field. The electromagnet is strongly attracted to the steel armature plate which is mounted on the secured door. Once the electromagnet is deactivated, the secured door will function normally without any residual magnetism.

  • 300-lb (136kg) Holding force
  • No residual magnetism
  • MOV Surge protection
  • Stainless steel housing
  • Adjustable mounting bracket
  • Complete mounting hardware for typical installations
  • Pre-installed 36″ (91cm) hookup wire included
  • 12VDC
  • Waterproof for outdoor use (IP67)
  • Lifetime limited warranty*

*Warranty applies in the USA and Canada only. Contact SECO­LARM for details.


Holding Force 300-lb (136kg)
Operating Voltage 12VDC±10%
Current Draw 315mA@12VDC
IP Rating IP67 Waterproof
Operating Temperature 14º~131º F (-10º~55º C)
Certification CE
Electromagnet Dimensions 6-3/4″x1″x1-1/4″ (170x23x32 mm)
RoHS Compliance Yes
Armature Dimensions 6″x3/8″x1-1/4″ (152x10x32 mm)
Case Shipping Weight 31-lb (14kg)
Weight 2-lb 13.5-oz (1.29kg)
Case Quantity 10 pcs



Door does not lock
  • Check to make sure the wires are securely tightened to the terminal block.
  • Check that the power supply is connected and operating.
  • Use a meter to check the resistance of coils inside the lock. See below.
  • Make sure the rubber washer is installed and free from damage.
Doors lock, but can easily be forced open
  • Make sure the electromagnet and armature plates are properly aligned.
  • Make sure the contact surfaces of the electromagnet and armature plates are clean and free from rust.
  • Check the power leads with a meter, and make sure 12VDC or 24VDC is present.
  • Make sure the rubber washer is installed and free from damage.
Delay in door releasing
  • The electromagnet is fitted with a metal oxide varistor to prevent interference, so do not install a second diode.
  • Ensure that the control device is connected between the power source and the positive terminal of the lock
No relay output
  • Check that the power is connected properly and turned on.
  • Make sure the lock is aligned properly.
  • Make sure the NO/NC/COM are wired properly.

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