Zeftronics Voltage Regulators - Generator Controllers For Single Engine

From $361.00 to $398.00
Mfr PN Description Replacement for PN Price Buy
G1120N14V, 12A GCU
Trouble Shooting Light, GCU will not cause OV fault in system, Reverse Current Protection
Delco Remy: 1118383, 1118902
Electrodelta: VR300-14-12
Cessna: 0413025-1
G1200N14V, 20A GCU
Trouble Shooting Light, GCU will not cause OV fault in system, Reverse Current Protection
Delco Remy: 1118736, 1118904, 1119226
Electrodelta: VR300-14-20
Lycoming: 72205
Piper: 450-383
Cessna: 0413025-4, 5, 12
G1250N14V, 25A GCU
Trouble Shooting Light, GCU will no cause OV fault in system, Reverse Current Protection
Delco Remy: 1118384
Electrodelta: VR300-14-25
Cessna: 0413025-2, 3
G1350N14V, 35A GCU
Trouble Shooting Light, GCU will not cause OV fault in system, Reverse Current Protection
Delco Remy: 1118704, 1119220, 1118892
Electrodelta: VR300-14-35
Cessna: 0413025-6, 8, 10
Beech: 35-380142-7
Piper: 450-390
Lycoming: 62883
G1500N14V, 50A GCU
Trouble Shooting Light, GCU will not cause OV fault in system, Reverse Current Protection
Delco Remy: 1118884, 1118713, 1119224
Electrodelta: VR300-14-50
Cessna: 0413025-7, 9, 11
Mooney: 940035-501
Beech: 35-380142-9
Lycoming: 71745
Subtotal $0.00
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Note: Manufacturer C of C not available on Zeftronics stocked units. Zeftronics C of C available via special order only. If certs are required, please add part # 07-00000 with your order (See Accessories).

As a factory authorized Zeftronics distributor, we can assure you the fastest delivery and best prices on all of your Zeftronics engine accessory requirements. We carry the complete Zeftronics product line. If you do not see the product you need listed, please call us for price and availability.

We have complete information on file cross referencing Zeftronics part numbers to all OEM part numbers.If you are not sure what part number you need for your aircraft, please call us for immediate assistance.

Download Aircraft Eligibility Chart in .pdf.

Note: Please read wiring instructions carefully prior to installation of voltage regulators. Improper wiring will void warranty All returns subject to manufacturer's warranty inspection. For an accurate cross reference, OEM Part Number Required. For Aircraft Eligibility, download the Eligibility Chart
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100% bolt in swap out. Works perfectly.

Geoffrey M Verified Purchase


November 18, 2021

Awesome! Brought my 80 year old generator to life!

Richard T Verified Purchase


October 15, 2021

Received quickly, product is as described. Fast free shipping and no problems. No time to install yet A&P has been super busy

Floyd T
April 9, 2021 improvement over the stock points style regulator. Seeing voltages of 13.8-14.2V consistently. I few confident running with all my lights at night now. Highly recommended.

Anthony-michel R
April 9, 2021

Direct replacement for the old one, much less jumpy on the ammeter. So far so good

Fred V
December 29, 2020

I have gone through 3 volatage regulators in less than 1 year. Now have Zeftronics voltage regulator and working great. Hasnt been long on yet but the others would have already quit.

Leroy Q
November 15, 2020

works great, had quite a problem trying to check out as a guest because I do not have (or want) a nother password to remember but a phone call solved that problem, this time.

March 28, 2020

I would like to update my pervious review. The GCU was not defective the issue was in my aircrafts wiring. This GCU works very well since it has been installed with new wiring.

Joel G
November 13, 2018

Easy to install as per the included installation manual. Works much better than the old relays based regulators. With the old regulator my Ammeter was all over the place. Now it is rock-steady and the current output at low RPMs (1500 RPM) is higher.

Mark J
May 14, 2017

They work better than the old point type and they cost less.

March 20, 2017


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.

Q: Are the Zeftronics Voltage Regulators TSO'd.

Per the Manufacturer, the Zeftronics Voltage Regulators are PMA'd but not TSO'd.

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