Bohemian Biker Blog

SAE 2 Pin, 2 Prong, 2 Pole, 2 Conductor – 12 Volt Connector

by on Apr.05, 2009, under SAE 2 Pin

SAE 2 Pin Connector

SAE 2 Pin Connector

It seems “SAE 2 Pin” is the most common “name” I’ve seen or heard given this handy connector, but I’ve also seen and heard the following (or variations of the following): SAE 2 Prong, SAE 2 Pole, SAE 2 Conductor, SAE 2 Wire…sometimes in combination with “molded”, “flat”, “trailer light”, or “trailer type” connector.

SAE 2 Pin Extension

SAE 2 Pin Extension

This is an assembly in which the SAE 2 pin connector is commonly seen – a 12″ extension often used in trailer light applications.   Note that this assembly, being a “true” extension, has the red wire leading to an exposed “male” pin at one end, and protected “female” socket at the other.  Thus, if you have an SAE 2 Pin that you want to connect to…and extend another 12″…the resulting end will have the same “pin” and “socket” arrangement you wanted to “extend”.
This brings up a key but subtle point.  As a matter of practice, if you have a set of wires coming from a source of power…such as a battery…to a SAE 2 Pin connector…the protected “female” socket will be the “hot” (+) positive side of the connector.  A good example of this is the fused “Quick Connect” provided by Deltran with their popular Battery Tenders…which is normally left installed on the battery for ease of battery charge maintenance when desired.  If the “Quick Connect” (or battery “pigtail”…as we sometimes call them) is installed correctly, the protected “female” socket will be the “hot” (+) positive side of the connector.
Think about it…you want the protection from “arcing out” on adjacent metal parts provided by that “enclosed’ socket…rather than have a “hot” exposed pin that could potentially “ground out” and “arc out” on the frame of the bike (regardless of having the tethered cap for protection while not in use).
So…the 12″ extension actually provides what you need to make an SAE 2 Pin “Junction”.  If you cut this assembly in half…you’ll have (2) SAE 2 Pin connectors…each with 6″ leads…and here’s the beauty of this…when you join these two connectors to each other…alas…the red wire leading to the male pin on one joins to the female socket of the other…with its red wire extending in the other direction…a beautiful thing.
This, my friends was one of the recognitions that gave me my start down this road – setting out to aid others in the integration and use of this useful connector.  I thought to myself, this information will be of use to other bikers in their “do-it-yourself” motorcycle accessory circuit wiring projects.  This came after, and as a result of an earlier recognition that both Deltran Battery Tenders  and many portable solar chargers use SAE 2 Pin connectors.  So this is what I’d fondly call a “Paul Harvey moment”…”and now you know the rest of the story”…sorry to hear this gentleman and famous radio personality passed March 1, 2009.
So, you might ask “why are you letting the cat out of the bag with respect to your source of these connectors with pigtail leads?”.  Well, I believe it’s a matter of “value added” – the value I add to this basic component, that is.  I work diligently at being a “search friendly” economical source of these connectors, as well as a source of information about these connectors.  I am more than happy to share what I’ve learned about this connector, and its use.  For some, it might be very easy to find a first hand source of SAE 2 Pin connectors, but for others…living in remote areas, for example…it might not be so easy.  In addition, when I package these “pigtailed” connectors, I make it a point to surprise my customers with the necessary sections of heat shrinkable tubing to aid in making neat installations.  Obviously, do-it-yourselfers could very well have this already, but generally my customers seem delighted to receive a little extra they hadn’t figured on.
I make these pigtailed connectors readily, conveniently, and economically available in 3 different forms – “power side”, “load side”, and as a “junction” assembly.  A “power side” connector being an SAE 2 Pin having the conductor with red insulation – indicating “hot” (+) positive –  leading to the protected “female” socket.  Conversely, a “load side” connector is an SAE 2 Pin which has the conductor with red insulation – “hot” (+) positive again – leading to the exposed “male” pin, as a “mate” to the above.  A “junction” is a “mating” set, including (1) “power side” and (1) “load side” pigtailed connector.
Bohemian Biker LLC makes SAE 2 Pin connectors available in another form, as well –  a higher quality form, actually.  We have an assembly manufactured here in the USA which integrates a larger bodied (lengthwise) SAE 2 Pin connector with approxiamately 11-1/2″  of Black SPT-1 Cord /2-18 AWG conductors.
Manufactured SAE 2 Pin w/cord

Manufactured SAE 2 Pin w/cord

 The larger size of this molded connector make it easier to manipulate, plus it’s sturdier.  As far as aesthetics go, being all Black is a plus, and the longer length provides some additional latitude with respect to stowing away the wire connection.  Again, I make it a point to include heat shrinkable tubing…in this case…both for the individual conductors…and for the cord (to go over the individual connections once heat shrink is applied to them) with enough to extend beyond each end of the individual areas with heat shrink applied.
Soldered joints are the ticket!  A small butane torch, solder, and a little practice will result in nice secure connections.  Depending on your specific wiring circumstances…you might need to put the wire through the tube of heat shrink beforehand, but make sure it’s far enough away not to heat it up prematurely.  The second layer of heat shrink over the whole cord provides some strain relief, as well as added protection.
Another handy aspect of this Black corded SAE 2 Pin connector is that there is no color coding.  Therefore it can be wired either way…as a “power side” or as a “load side” connector…without violating the color standard.  Although…you don’t have that color indication to keep you straight either!

We welcome email at: bohemianbiker@bohemianbiker.com

The above, as well as heavier gauge products are available through our new e-commerce website at:  www.solarcapitalist.com  

Here’s a link to the 18 AWG products:  http://www.solarcapitalist.com/sae2pin18awg.aspx

Solar Capitalist LLC is our sister company handling products such as those discussed above, Deltran Battery Tenders, as well as Portable Solar Chargers – Capitalize on the Sun’s Energy !

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