Seco-Larm SD-994A-A1AQ Asymmetric Electric Door Strike

Fail-Secure Electric Strike for Wood Doors – Asymmetric Faceplate

The SECO-LARM SD-994A-A1AQ is a compact, fail-secure electric door strike designed for use with wood doors and cylindrical locksets. Featuring an asymmetric reversible faceplate, this model allows for right- or left-handed installations without requiring additional parts. With a corrosion-resistant housing, high jaw strength, and compatibility with standard 8–16 VAC or 12VDC systems, the SD-994A-A1AQ is ideal for residential and light-commercial access control installations.

This unit is UL-tested for performance, rated at 1,000 lbs jaw strength, and has been cycle-tested up to 500,000 uses. The compact profile and low-profile strike body make installation easier in wood door frames, especially where space is limited.

Faceplate is asymmetric (strike pocket not centered). For symmetric version, see model SD-994A-A1SQ.

Key Features

• Fail-secure operation – Remains locked during power loss (unlock on power)
• Asymmetric faceplate – Reversible for right- or left-hand door installations
• High jaw strength – Rated for 1,000 lbs holding force
• Cycle-tested durability – Rated for 500,000 cycles
• Miniature strike body – Compact design simplifies installation in wood frames
• Corrosion-resistant construction – For long-term reliability in interior environments
• Low current draw – Compatible with 8–16 VAC or 12VDC power supplies

Technical Specifications

• Model: SD-994A-A1AQ
• Operation: Fail-secure
• Faceplate Style: Asymmetric, reversible
• Input Voltage: 8–16 VAC or 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)
• Operating Temperature: 14°F to 113°F (-10°C to 45°C)
• Faceplate Dimensions: 5-7/8" × 1-1/4" × 1/8" (150 × 32 × 3.2 mm)
• Material: Zinc die-cast with corrosion-resistant components
• Weight: 10.3 oz (292 g)

Conclusion

The SECO-LARM SD-994A-A1AQ is a compact, dependable electric strike designed to secure wood doors in access-controlled environments. With high jaw strength, reversible mounting, and fail-secure functionality, it's an ideal fit for cylindrical lock setups where safety, compliance, and easy installation matter.