Where can I find this Klixon thermal protector at?

[cmf21]

Can't find this item any where for sale. A Klixon 7am 020 thermal protector. Looks like this I broke one of the ends off and hopefully someone knows where I can pick one up or a similiar part. I'm trying to repair a battery pack for a 24v electric bike. I can't find it anywhere and it's driving me nuts.

 

[Jeff7]

I found a datasheet; it looks like it's just a thermal cutoff switch. 020 apparently means it cuts out at 65°C.

Maybe a substitute will be needed.
The 7am is rated (10,000 cycles):
20A @ 16VDC
22A @ 120VAC
8A @ 277VAC
4A @ 600VAC


Check pg 2028 of Digikey's catalog though.
Text
I figure you'll want a Normally Closed switch.

317-1083-ND - Only rated to 8.5A at 24VDC.
I don't suppose you might know how many amps will be flowing through this?

480-3237-ND - this one looks like it's got higher current ratings than the 317-1083 model. It only lists AC voltage ratings though, so I don't know how it'd do at 24VDC.

Jameco - rated to 75°C though.

Text - again, the ratings are only given for 120VAC. (15 amps resistive).


Or else go right to the source.

 

[cmf21]

Checked the service manual and it looks like the charger input is 115 VAC, 60/50 Hz, 2 amps and the output is 24VDC, 3 amps

Also forgot to mention that I have two 12v batteries in a series.

 

[cmf21]

Would something from here work? Pepi

 

[Jeff7]

Originally posted by: cmf21
Checked the service manual and it looks like the charger input is 115 VAC, 60/50 Hz, 2 amps and the output is 24VDC, 3 amps

Also forgot to mention that I have two 12v batteries in a series.

That sounds like the current ratings for the charger itself, but depending on how the thermal sensor is wired, it might have to endure the discharge current of the batteries as well, which is likely to be much higher than 3A.
But I don't know how these things are normally wired, so I couldn't say for sure.

Originally posted by: cmf21
Would something from here work? Pepi

Those definitely look similar.
Without knowing more about the exact manner of application, I'd suggest just getting something with the same (or higher) ratings as the original sensor:

20A @ 16VDC
22A @ 120VAC
8A @ 277VAC
4A @ 600VAC

Text

 

[cmf21]

Made a Diagram I had to edit the diagram to include the thermal proctector since it wasn't listed. A bullet connector was in it's place.

To help clarify, this a a battery pack for an electric bike that can be recharged in the bike or taken out. I also noticed that the batteries are 12 volt, 12 amp hrs.