very high current DC switch

[Chris W]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?


--
Chris W
KE5GIX

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[Peter A Forbes]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

Have you thought of contactors?

Car starter solenoids, battery vehicle contactors etc?

Just a thought, DC switches are getting rarer by the year, we use some Schneider
Group switches that are fast breaking but way outside your budget.

Peter

 

[JeffM]

a reasonably priced ($30 or less) switch

that can handle at least 200 amps at 13.8V?
Chris W
KE5GIX

http://www.google.com/images?q=Ford+solenoid
Availaible in junkyards even cheaper.

 

[Tim Williams]

Have you thought of contactors?

As I recall, contactors are rape. Hell, the MOSFETs to do that (say, 8 x
IRFZ46N, maybe $10) are cheaper than the $1/amp I recall advertised. YMMV..

Tim

 

[Bill Janssen]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

Don't know about the $30.00 or less but Marine and RV places have a
battery selector switch.

Bill K7NOM

 

[Peter A Forbes]

As I recall, contactors are rape. Hell, the MOSFETs to do that (say, 8 x
IRFZ46N, maybe $10) are cheaper than the $1/amp I recall advertised. YMMV..

Tim

We pay £18 or so for a 180A rated 28V DC continuously rated coil, or
higher/lower price depending on output.

We make large industrial chargers for the rail industry and use these for output
cutoff.

Have a look at Albright International's website:

http://www.albright.co.uk/

We use the SW80, SW180, SW200 and SW201 (SW201 has Change-over contacts)

If any of those meet your needs, we can probably help source some in small
numbers for you or they may have agents over in the USA.

We only use 28V DC continuously rated coils (most other voltages are available)
and have SW80 and SW180 on the shelf in the stores here.

HTH

Peter

 

[Jasen Betts]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

maybe an old starter switch (from before solenoids/relays were used)

Bye.
Jasen

 

[Roy L. Fuchs]

maybe an old starter switch (from before solenoids/relays were used)

http://205.243.100.155/frames/Newgap2a.jpg

Hahahahaahahahaa! Thousands of Amps!

 

[Jamie]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

go to your auto parts store and ask for a
out board starter solenoid.

 

[Ross Herbert]

http://205.243.100.155/frames/Newgap2a.jpg

Hahahahaahahahaa! Thousands of Amps!

I'd like to see those contacts after they tried to break a motor
circuit carrying 100A DC - the return spring looks very weak... not
exactly a rapid action.

 

[default]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

Momentary:
Starter solenoid (they usually have a limited duty cycle)

Sustained contact:
Industrial power contactor (Relay)

Battery Selector switch as used on Boats -(usually four position
Battery #1, Battery #2, Both, Off)

Check an auto parts store for a battery switch - usually designed to
mount on the battery terminal to break contact to prevent loads and
leakage from running down the battery while in storage, or to prevent
vehicle theft.

A Big Old knife switch - scarcer than hen's teeth, but relatively easy
to make.

 

[John]

Does anyone know where I can get a reasonably priced ($30 or less)
switch that can handle at least 200 amps at 13.8V?

IGBT transistor rated at 200amps - $30
http://www.mpja.com/productview.asp?product=15539+QT