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Part# 07-01173
MFR Model# B-00387-1
Lamar PNDescriptionApplicationsPN
B-00387-1Voltage Regulator with Overvoltage Protection, 28VHawker Beech 36-380096-107-01173


The Lamar MC10 is a master electrical control unit developed for 14V and 24V single engine experimental aircraft. It is designed to mount on the firewall or fuselage. It houses all the major electrical components except for the battery, starter, and alternator. The MC10 provides a greater degree of protection against moisture, dust and accidental electrical shorts along with the convenience of all the primary electrical components in one location. Features low installation cost, ease of installation and simplified troubleshooting and repair with several new performance and safety features.

* All astricked items are available through OEM only.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Master (battery) (solenoid) control closing the master switch on pilot's panel connects the battery to the primary bus
  • 3 aircraft bus outputs, protected via resetable circuit breakers
  • Alternator Control; voltage regulation, overvoltage protection, field output over-load protection, alternator feeder fault protection
  • Starter control (solenoid)
  • Low voltage warning.(L model also includes overvoltage, over-current and reverse-current annunciation)
  • Battery charge/ discharge ammeter drive (current shunt)
  • Clock output (always-on) pro-tected with easily accesible external mounted fuse
  • Ground power receptacle & control (solenoid) with reverse polarity protection
  • Frequently Purchased With
  • Customers Also Viewed


Works great, super easy install. Note the pictured item doesnt represent the various listed voltage regulators.

Plane C
May 18, 2021


Please note,'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. 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.

Q: when searching for voltage regulator Lamar B-00331-2 image shows a different part looks nothing like mine, is this correct

The photo is a representative image. Some part #'s listed on this page may look different than the photo.

Q: What is the warranty on the voltage regulator? (B-00331-2)

(1) year from receipt.