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Old Sep 07, 2007, 04:44 AM
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Centerville, In. USA
Joined Jul 2001
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Best type motor connector?

At what point does the Dean 3 pin connector become to lightweight for a motor connector? The motor I have just wound should pull a max of 19-20 amps. and probably only in short bursts. Will a Dean's 3 pin connector be sufficient or will it get hot? I also have some bullet type connectors I can use but I'd rather not because I think they would be be heavier. Any opinions? Rcnutt
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Old Sep 07, 2007, 05:27 AM
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M Ashmore's Avatar
Bakersfield, California
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Here's a good article.
http://www.flyrc.com/articles/connectors_1.shtml

Mike
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Old Sep 07, 2007, 09:35 AM
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The Northeast Kingdom, Vermont
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Just my 2 cents, but the 3 pin Deans are way too small for a motor that will be used up to 20A. even for short bursts. At this power level I can't imagine why the weight of bullets would be an issue
Pete
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Old Sep 07, 2007, 10:05 AM
Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
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It's easier to solder 3 wires than 6 connectors, lighter, and cheaper.


Chuck
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Old Sep 07, 2007, 01:41 PM
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Dr Kiwi's Avatar
Chattanooga, Tennessee, United States
Joined May 2003
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Quote:
Originally Posted by Chuck
It's easier to solder 3 wires than 6 connectors, lighter, and cheaper.


Chuck

I'd rather solder bullet or MP Jet Gold connectors on any day - I think soldering leads on to those MicroDeans is a real PITA!!

I added Gold connectors to 7 Suppo motors the other day (a total of 21, 2.5mm male connectors and shrink tube) - in less than 30 minutes! It takes me at least 10 minutes to do one MicroDeans - or at least it seems that long.

The main point though, is that 3-pin MicroDeans are really not suitable for 20A or so - I did some comparative tests with 3-pin MicroDeans and 1.8mm Gold Connectors - the MicroDeans noticeably reduced the amp draw to the motor, and got hot while doing so at only 10A-15A.

I just weighed twenty 2.5mm male Gold Connectors = 12g - that's only 0.6g each! (females are even lighter).

If I recall correctly 1.8mm Gold connectors weigh well under half that, so you are talking about <2g for a full set of six 1.8mm connectors (which can cope with 25A).
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Old Sep 07, 2007, 02:36 PM
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Centerville, In. USA
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Soldering the wires together is of course the best way but then you can't switch motors if you wanted to. I guess I'll use my bullet type connectors. It seems everyone is in agreement that the Dean's 3 pin is not heavy enough. Thanx guys for the feedback. I appreciate it a lot. RCNutt
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Old Sep 07, 2007, 04:01 PM
Balsa to the Wall
Deep in the East Texas Piney Woods
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Soldering to the Micro Deans isn't what aggravates me, it's the fact that the pins get loose in the plastic housing and push out, leaving a bad or no connection. I've replaced all my Micros because of that. I also like the MPJet connectors for connectivity and weight. I wish I had started with those. To convert from Deans Ultra would cost a small fortune now.. Oops, OT, this thread is about motor connectors, sorry.

Yes, MPJet for the motor, definitely.

Chuck
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Old Sep 08, 2007, 05:50 AM
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Centerville, In. USA
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I agree with you about the pins coming loose. About two weeks ago A friend was flying my fast little flying wing and all of a sudden there was zero power and zero control. It crashed. Upon examination I found a wirehad slid out of the Deans micro connector plastic body. The connectors I have put on my new motor was from United Hobbies. It wasn't there biggest one and I don't remember the exact amp rating of the connector, but I know the amp rating was plenty high enough for this motor and it fits nice and tight. I have yet to run the motor. I just got it wound the other day and need to make a motor mount for it. Thanx for writing in. RCNutt
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Old Sep 09, 2007, 02:33 PM
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Chattanooga, Tennessee, United States
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Quote:
Originally Posted by Chuck
Soldering to the Micro Deans isn't what aggravates me, it's the fact that the pins get loose in the plastic housing and push out, leaving a bad or no connection. I've replaced all my Micros because of that. I also like the MPJet connectors for connectivity and weight. I wish I had started with those. To convert from Deans Ultra would cost a small fortune now.. Oops, OT, this thread is about motor connectors, sorry.

Yes, MPJet for the motor, definitely.

Chuck
I got into MP Jet Connectors early on - so my packs, ESC's and motors all have 'em now. The trouble is I have to make up three wire patch cords for all the varieties of connectors that manufacturers fit to the brushless motors I get for testing. There are MicroDeans 3-pin, fake MicroDeans 3-pin with different spacing, those skinny 2mm bullets, 2.4mm bullets, and of course the relatively standard 3.5mm bullets (but even different brands of those are not interchangeable - Jeti 3.5mm and cheap Chinese 3.5mm don't work together).

I just bought another three dozen male MP Jet 2.5mm from AC World - the best source I know of.
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