FAA-PMA APPROVED for Certified AircraftContinuous Duty (Battery/Master Solenoid). Available in 12V and 24V. Activation: -(Ground) to S-Terminal. (Floating ground frame).
All stock meets Service Bulletin 72.
so far so good
Good fit. Solid construction. No more jiggling battery leads to get relay to engage.
to replace an original equipment solenoid in my OLD Mooney, this is the only game in town (and at a reasonable price too). it fit just fine and operates exactly as expected. as usual, no complaints with anything from Aircraft Spruce.
This product fit in the mount and to this point accomplishes the intended task at a fraction of the OEM part.
Good Part- standard replacement.
We installed them on 3 of the Cessnas in our rental fleet. Had problems with one of them dropping out in flight. Complied with the service bulletin and Hartzell sent 3 new units. One of the new units in a Cessna 150 failed ON after about 60 hrs. We were able to bring a flat battery back. Hartzell replaced the unit for free. The replacement unit has now also failed ON after 45 hrs.
Installed in my E-AB. Aircraft is yet to fly and this product failed with under 100 cycles of use. Only has been turned on to test/calibrate. Solenoid actuates but the contacts internally have glazed and it does not permit power to flow through. Shows 13.6 VDC in but 0.22 VDC out. Would not purchase again.
The total current draw is 0.8 amps.
The STS-M12 is for the battery master. The STS-a12 is for Auxiliary master, like a GPU.
The coil terminals are #10's and the power terminals are 5/16ths. It is recommended to mount per the airframe specifications. If none, it is recommended to mount with the cap up.
Per Vendor: This product does not include the diode. You do not need the diode for the part to work correctly, it is simply a safety precaution some like to take. The airframe manufacturer might have a diode they recommend.
12 mo from date of installation of product or 500 hrs - whichever comes first. Log books are required for warranty