Alternator Controller/Regulator, 14v (Homebuilt)

The LR3C Controller combines three essential devices in one physical container, making it a lightweight, space-saving, and cost-effective alternative for any aircraft electrical system, while also improving safety of flight.  First, the LR3C operates as a “quiet,” linear regulator, generating no audio or radio noise (in contrast to switching-type regulators). Second, it provides a vital safeguard for your aircraft electrical system with a solid-state, “crowbar” overvoltage protection circuit. And third, the LR3C Controller functions as an important low-voltage monitoring and warning system.

Available in 14 volt and 28 volt models, the LR3C weighs approximately 9 ounces, and may be mounted on the cockpit side of the firewall. It is also available with an optional battery temperature sensor—ideal for aircraft in colder climates.

Used on all externally regulated alternators using circuit type "B" (one field lead grounded directly).

For Experimental Aircraft ONLY

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Installation Advisory:

Select a location for mounting that will protect unit from heat, vibration, and water. The pilot side of the firewall, or inside the cabin near the instrument panel, is recommended.

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Quick Facts

LR3C-14 Wiring Diagram and Installation Instructions