Seco-Larm SD-994A-A1SQ Symmetric Electric Door Strike

Symmetric Fail-Secure Electric Strike for Wood Doors

The SECO-LARM SD-994A-A1SQ is a compact, fail-secure electric door strike designed for wood doors with cylindrical locksets. Featuring a symmetric reversible faceplate, this model allows for universal left- or right-hand installations. With a centered strike pocket and durable zinc alloy housing, the A1SQ model is engineered for simplified alignment, consistent latching, and secure perimeter control in indoor environments.

Rated for 1,000 lbs jaw strength and tested to 500,000 cycles, the SD-994A-A1SQ is ideal for access-controlled doors where reliability and space efficiency are critical.

For asymmetric installations, see model SD-994A-A1AQ. Not rated for outdoor use.

Key Features

• Symmetric faceplate – Strike pocket is centered; reversible for left- or right-hand doors
• Fail-secure operation – Remains locked during power loss; unlocks when power is applied
• High jaw strength – Holds up to 1,000 lbs; tested to 500,000 cycles
• Miniature strike body – Compact design ideal for wood jamb installation
• Corrosion-resistant components – Suitable for interior, access-controlled environments
• Low voltage compatibility – Accepts 8–16 VAC or 12VDC

Technical Specifications

• Model: SD-994A-A1SQ
• Operation: Fail-secure
• Faceplate Style: Symmetric, reversible
• Input Voltage: 8–16 VAC / 12VDC
• Current Draw: 800mA @ 16VAC / 750mA @ 12VDC
• Jaw Strength: 1,000 lbs
• Cycle Life: 500,000 operations
• Keeper Depth: 21/32" (16.8 mm)
• Strike Depth: 1-1/2" (38 mm)
• Faceplate Dimensions: 5-7/8" × 1-1/4" × 1/8" (150 × 32 × 3.2 mm)
• Material: Zinc die-cast
• Temperature Range: 14°F to 113°F (−10°C to 45°C)
• Mounting Style: Recessed/mortise
• Weight: 10.3 oz (292 g)

Conclusion

The SECO-LARM SD-994A-A1SQ is a space-saving, high-strength electric strike designed for use in wood door frames where a symmetric strike profile is preferred. Its compact, reversible design and fail-secure operation make it an ideal solution for access control installations prioritizing reliability and easy alignment.