SDC EHRA4A 4” Adjustable Armature Extension | For EH Series Door Holders

The SDC EHRA4A is a heavy-duty 4-inch adjustable armature extension rod designed specifically for the SDC EH Series electromagnetic door holders. This essential hardware accessory is the professional solution for door restoration in facilities where the distance between the wall-mounted magnet and the door-mounted catch plate exceeds standard projection limits. By providing an additional 4 inches of reach and fine-tuned adjustability, the EHRA4A ensures a secure, flush connection between the magnet and armature, making it a critical solution for commercial door security and life safety compliance.

Enhanced Alignment for Fire and Life Safety

The SDC EHRA4A is more than just a spacer; it is a precision alignment tool. It acts as a proactive solution for door surface repair by compensating for extreme architectural misalignments or deep door recesses:

• Superior Reach & Adjustability: Provides a 4-inch extension to bridge large gaps between the door and the wall. The "adjustable" design allows for granular length modification to ensure the armature sits perfectly flush against the magnet face.
  
• Optimized Operational Alignment: Proper contact is required to achieve full holding force (up to 40 lbs standard or 110 lbs high-holding). The EHRA4A ensures that even with warped doors or uneven walls, the catch plate maintains maximum surface contact.
• Failsafe Emergency Release: Designed to work seamlessly with fire life safety systems. When power is cut by the fire alarm, the extension rod ensures the door is released cleanly from its held-open position to provide a barrier against fire and smoke.
  
• Durable Construction: Built from high-quality aluminum with a chrome powder coat finish (689/US28), providing an aesthetically pleasing look that matches modern commercial hardware.
  

Versatile Installation and Benefits

The SDC EHRA4A is a field-installable solution for door restoration that simplifies complex door-opening challenges:

• Universal Compatibility: Designed to work with all SDC EH Series models, including EH10 (Flush), EH20 (Semi-Flush), EH30 (Surface), and EH40 (Floor Mount) units.
• Compensates for Misalignment: Ideal for installations where the door cannot swing close enough to the wall due to obstacles, plumbing, or architectural trim.
• Hands-Free Installation: Part of the EZ mount assembly system, the extension rod integrates quickly with the existing armature swivel base, requiring minimal tools for a secure fit.
• Secure Fastening: Mounts firmly to the door using standard hardware or high-strength thru bolts for maximum stability in high-traffic corridors like those found in hospitals, schools, and industrial centers.

Technical Details & Specifications

• Brand: SDC (Security Door Controls)
• Model: EHRA4A (Adjustable Extension Rod)
  
• Extension Length: 4 Inches (Adjustable)
  
• Material: Die-Cast Aluminum
• Finish: Chrome Powder Coat (689/US28 Matte Silver)
• Series Compatibility: SDC EH Series Magnetic Door Holders
• Application: Interior and perimeter fire-rated doors