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Home / Electrical / Switches / Master /Cessna Split Master Switch -Red
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Cessna Split Master Switch -Red

29 Reviews 9 Answered Questions
$47.50/Each
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Part# 11-15900
MFR Model# S1994-1-1

Overview

This versatile split red master switch has been used in virtually all single engine Cessna models since 1970 and can be used in most light aircraft with single alternator systems. Left rocker normally used for alternator and right half for battery. Order mount separately.

Amp Rating is 20.
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Reviews

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Awesome!

Automotive E Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
December 6, 2023

Dietmar K Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
October 6, 2023

Have not installed yet, but looks and feels like an exact replacement for the original.

Michael G Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
February 19, 2023

Evert J Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
December 31, 2022

Excellent fit

Bruce Y Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
November 28, 2022

Magaero L Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
September 21, 2022

Magaero L Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
September 16, 2022

Excellent pop in replacement for my stock Cessna switch

Jim P Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
June 8, 2022

Quality part

Robbey B Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
April 26, 2022

works great, old one lasted over 20 years.

Tscm G Verified Purchase

CESSNA SPLIT MASTER SWITCH S1994-1-1
March 15, 2022

Q&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.

Q: How many amps can this switch handle?

The amp rating for this switch is 20.

Q: Is this Cessna Split Master Switch - Red FAA approved for installation in certified aircraft?

Yes, this is a Cessna part and is FAA approved to be used on Cessna aircraft. A field approval my be required if installed on any other certified aircraft.

Q: What are the dimensions of this Cessna split master switch? Specifically: the height, width, and depth?

The approximate dimensions are: 1-5/16" H x 3/4" W x 1-7/8" Max Depth (End of Terminal to top of Raised Switch).

Q: Can this switch be wired in either direction? I.e. Is one pole for ground only?

Per the supplier: Yes, they can be wired in either direction.

Q: Already purchased this switch. There was no wiring instructions with it. Do you know where to find it?

The Cessna split master, part number 11-15900, does not include any specific wiring instructions. The Cessna maintenance manual supplies all information needed for this installation. The positive and negative terminals on the switch are reversible, you may wire them in either direction.

Q: Tanis Heater. Can you leave these on continuously during cold weather without harming anything?

The great thing with a Tanis Preheat System is that you can leave it plugged in all the time and not have any concern of hurting anything. The reason for this is with a Tanis Preheat System we heat all of the components that are above the oil line hotter than the oil or another way to state it is the components are above the dew point temperature in your engine. We have the only preheat system that can make this claim. This keeps any moisture that is in your oil from condensing on those components.

Q: Which wire end terimianls are used with this switch? Pidg? size? Thanks.

Pidg terminals would work, the tabs are .25" wide.

Q: I need a new split master switch for my 1979 C185F. It has the 24v system. Will this switch work?

Yes, this can be used with both 14v and 28v systems.

Q: Is the 20 Amp rating combined for both sides (10 amps per switch), or 20 Amps per side?

Its 20 amp and (1) side turns off/on the alternator.

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