Rotary switch, high amps, medium voltage, MBF, Dp, 6+ positions

akis · 24th November 2010, 02:49 PM

Hello, I am looking for something like the above switch specs:

Dual pole, 6 or more positions, MBF, 5A or more at 50V DC

Without having to pay a small fortune

indianajo · 03:12 PM

I'm not sure anybody ever made anything like this. Aside from the "MBF" which has not been legal to sell in the UK since 1763, the 5 amps is a killer. Industrial supply houses carry 3 position "reversing" switches with a rotary action, suitable for 5 amps @ 460 VAC, but they are on-off-on. Probably your best bet would be to combine a regular 6 position rotary switch with 6 relays or, if truly dc@50V, 12 transistors. You'd need a little wall plug power supply for the relay coils or the transistor base feed. If ever much below 10V, silver relay contacts would be better than copper.

akis · 24th November 2010, 03:44 PM

Thanks they do seem to be tricky to get, althought mouser does have this R20507RR02Q C&K Components Rotary Switches.

Relays are too much of an effort and space. Transistors will introduce resistance in the current path and an unnecessary voltage drop.

All I want is a switch to select an appropriate value current sensing resistors. The highest current is 5A (or 6A maybe) so I was looking in general for a 5A capable switch.

The thread discussing this is in power supplies where I will continue.

24th November 2010, 02:49 PM	#1
akis diyAudio Member Join Date: Jul 2008	Rotary switch, high amps, medium voltage, MBF, Dp, 6+ positions Hello, I am looking for something like the above switch specs: Dual pole, 6 or more positions, MBF, 5A or more at 50V DC Without having to pay a small fortune

24th November 2010, 03:09 PM	#2
indianajo diyAudio Member Join Date: Jan 2010 Location: Jeffersonville, Indiana USA	the moon I'm not sure anybody ever made anything like this. Aside from the "MBF" which has not been legal to sell in the UK since 1763, the 5 amps is a killer. Industrial supply houses carry 3 position "reversing" switches with a rotary action, suitable for 5 amps @ 460 VAC, but they are on-off-on. Probably your best bet would be to combine a regular 6 position rotary switch with 6 relays or, if truly dc@50V, 12 transistors. You'd need a little wall plug power supply for the relay coils or the transistor base feed. If ever much below 10V, silver relay contacts would be better than copper. __________________ Dynakit ST70, ST120, PAS2,Hammond H182(2 ea),H112,A100,10-82TC,Peavey CS800S,SP2-XT's, T-300 HF Projs, Steinway console, Herald RA88a mixer, Wurlitzer 4500 Last edited by indianajo; 24th November 2010 at 03:12 PM.

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24th November 2010, 03:44 PM	#3
akis diyAudio Member Join Date: Jul 2008	Thanks they do seem to be tricky to get, althought mouser does have this R20507RR02Q C&K Components Rotary Switches. Relays are too much of an effort and space. Transistors will introduce resistance in the current path and an unnecessary voltage drop. All I want is a switch to select an appropriate value current sensing resistors. The highest current is 5A (or 6A maybe) so I was looking in general for a 5A capable switch. The thread discussing this is in power supplies where I will continue.

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