Aircraft External Power Receptacle - Keep an eye on your inbox for your $25 off code. Valid on Orders Placed within 14 Days of Code Request
AN2552-3A – Oval Shaped, 3 -pin external power receptacle, designed to mount in opening in the skin of aircraft. Used on Beech, Cessna, Mooney, Grumman. Mates with AN2551 type plugs like the ASOC 6216 Ground power plug for auxiliary power, battery charging and GPU use. Dim: 3 3/16" x 1 3/4" x 2 5/8".
Aircraft External Power Receptacle
Two larger pins provide power and ground for the main high voltage circuit. The shorter third pin powers a low amperage circuit that energises a solenoid to close the high amperage circuit after the longer pins have first been partially inserted into their sockets. The low amperage circuit makes use of the aircraft electrical systems common ground and therefore needs only one pin for power. All three pins are silver plated to avoid arcing.
Roger Roger
The Question by a customer “can this be used with a solar charger” was not given a good answer. The answer is “YES” it can be used for that purpose...PROVIDED the AN2552/MS3506 is directly connected to the battery and not thru a relay. (See your aircraft wiring schematic. An example is the Cessna 170B Illustrated Parts Catalog, in which the AN2552/MS3506 is directly connected to the battery-side of the master switch relay at the battery box. ) This is how mine is installed and I keep it continuously served by a battery maintainer this way. Hope this helps.
AN2551 The purpose of the 3 pin ground power unit connector. The purpose of the 3 pin ground power unit connector in aircraft? Why the third pin is shorter in length than the other two and is it positive or negative?
It allows the device to be plugged in, the power connections made, and then the power turned on as the connector is inserted. It also allows the power to be disconnected prior to the larger power pins clearing the connector.
Some Exclusions Apply (GA Batteries/Plugs/Filters/Tires/Oil, MRP/MAP/Sale Items & Others)
Oval External Power Receptacle An -A
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Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.
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