Alarm Controls Magnetic Lock Accessories - Drop Down Plates for Single Locks

It is a mounting wall plate for a single magnetic lock, used where the lock body cannot sit directly against the header or the frame face. The plate drops the lock down off the header so the armature on the door lines up with the magnet. The AM3300 is the 1/2 inch version for a 600 Series single maglock; the AM3305 is the 5/8 inch version of the same plate.

The plates are series specific, so pick by the lock you already have. For a 600 Series single lock the plates are AM3300 (1/2 inch), AM3305 (5/8 inch) and AM3330 (additional header wall plate). For a 1200 Series single lock the equivalents are AM6300 (1/2 inch), AM6305 (5/8 inch) and AM6330 (additional header wall plate). Ordering the 3300 group for a 1200 Series lock, or the reverse, gets you a plate that does not match the lock body.

Thickness, and that is the whole decision. The 1/2 inch plate (AM3300 for 600 Series, AM6300 for 1200 Series) drops the lock 1/2 inch off the mounting surface; the 5/8 inch plate (AM3305 and AM6305) drops it 5/8 inch. You choose based on how much offset you need to get the magnet face and the armature to meet flush. Measure the gap on the actual opening before you pick.

No. Every plate in this group is specified for a single magnetic lock, 600 or 1200 Series. A pair of doors with a maglock on each leaf needs the double lock plates, not these. Order the single lock plate only when there is one lock at the header.

The AM3330 is an extra header plate that fits all 600 Series single magnetic locks, and the AM6330 is the same part for all 1200 Series single locks. It stacks on to add more offset when a single drop down plate does not bring the lock far enough off the header. Unlike the 1/2 and 5/8 inch plates, the 3330 and 6330 are not tied to one lock model within their series.

Standard finish on the drop down plates is clear anodized aluminum, US28, which matches the usual aluminum storefront frame. If you are working on a dark bronze opening, the AM6330-DURO is the additional header plate for 1200 Series single locks in US40 duranodic. That duranodic option is only offered on the 6330 header plate.

You need one when the magnet face and the armature plate do not meet flat. On a door with an offset header, a recessed frame, or a stop that keeps the lock body from sitting where the armature swings, the magnet only makes partial contact and the lock will not hold its rated force. The drop down plate moves the lock body out to close that gap. Check the offset on the opening first, then order the 1/2 inch or 5/8 inch plate for your series, and add the header plate if you need more.

Yes, these are commercial door hardware, the same class of part used on aluminum storefront and interior access control openings in offices, schools and multi family buildings. The clear anodized aluminum plate is the common pairing with an anodized aluminum frame.