Help identify thermal switch (thermostat) - Page 1
Forum section: electronics / repair

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 06, 2022, 07:47:04 am
content: I have a thermostatic switch which I need to identify the temperature for but unsure which value to use.These are the markings on the unit:KSE-168C12A250V~210C RS 2I need help to ensure I pick the correct cut off temperature 168/210.It’s a safety mechanism so I’d like some support.Thanks

author: BILLPOD
author_rank: Frequent Contributor
timestamp: October 06, 2022, 05:23:02 pm
content: The 210C might mean 210 degrees Centigrade?

author: fzabkar
author_rank: Super Contributor
timestamp: October 06, 2022, 05:42:18 pm
content: The following part is described as "KSE168C 12A 130 degrees Manual Reset Thermal Micro Switch 2 pin 250V RS5132 KSE":https://i.ebayimg.com/images/g/sDcAAOSwg7BhxINh/s-l1600.jpghttps://www.ebay.co.uk/itm/324957012727?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&customid=&toolid=10050Others with different temps ...https://img.alicdn.com/imgextra/i1/111232759/O1CN01GWzUwO1WFfNa2DOzz_!!111232759.jpghttps://gw.alicdn.com/imgextra/i2/111232759/O1CN01SRz33t1WFfOzYWXQr_!!111232759.jpg(KSE-168B)

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 06, 2022, 07:00:44 pm
content: This was my problem is it 168C or 210CPersonally more inclined to 210 degree C since it’s written following the voltage and amperage

author: floobydust
author_rank: Super Contributor
timestamp: October 06, 2022, 07:12:08 pm
content: You can match the A logo and then trace the manufacturer and datasheet.Temperature trip rating is on the collar 210°C.. It has a manual reset pushbutton pin.

author: fzabkar
author_rank: Super Contributor
timestamp: October 06, 2022, 07:27:28 pm
content: Quote from: aqibi2000 on October 06, 2022, 07:00:44 pm"168" is obviously the part number. That's why I highlighted the "B" in "168B".

author: fzabkar
author_rank: Super Contributor
timestamp: October 06, 2022, 07:50:30 pm
content: Quote from: floobydust on October 06, 2022, 07:12:08 pmI found this part with the same logo:https://www.indiamart.com/proddetail/ramcon-ksd-thermal-cutout-thermostat-20725050833.htmlhttps://5.imimg.com/data5/SELLER/Default/2020/9/SJ/TE/SI/4360251/ksd-thermal-cutout-thermostat.jpegIt purports to be manufactured by Ramcon, but the logo doesn't appear to be theirs.Some thermostats have a "CQC" logo, but that's probably a certification mark:https://www.cqc.com.cn/www/english/aboutcqc/Edit:The "A" logo is the certification symbol for TUVRheinland:https://www.tuv.com/australia/en/

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 06, 2022, 08:14:51 pm
content: Thanks both, much appreciated.Any chance you guys can help find a 210 degree one rated for 12A. I’ve found many 10A ones available in the UK.I’m after an automatic reset one, upgrade to no longer require the manual switch

author: floobydust
author_rank: Super Contributor
timestamp: October 06, 2022, 09:19:30 pm
content: Changing the operation from manual reset to auto-reset changes the safety properties of the appliance.It's supposed to overheat and trip once, and go to the the repair shop.If it's regularly overheating, there is something else wrong - airflow etc.

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 06, 2022, 09:27:18 pm
content: On this occasion I’m modifying it since the encloser has a 20cm gap to where the switch is located (therefore a plastic rod used to push the button which is lost - not that it trips consistently).I don’t feel comfortable gluing a rod to the switch to account for the gap only for it to get lost (again)

author: james_s
author_rank: Super Contributor
timestamp: October 06, 2022, 11:11:47 pm
content: What is it for?How much current does the actual load draw? Is it more than 10 amps? You could use a lower current thermostat to control a relay in a pinch.

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 07, 2022, 06:33:23 am
content: It’s a commercial desktop oven

author: Haenk
author_rank: Super Contributor
timestamp: October 07, 2022, 08:07:54 am
content: Quote from: aqibi2000 on October 07, 2022, 06:33:23 amHonestly, I would not tinker around with stuff commercially used, especially if it is safety related.Ask the manufacturer for a spare part, pay 20x the Aliexpress price, but feel yourself on the safe side, when insurance claims arise. (Probably not fun, when the commercial oven overheats due to a failing Aliexpress part and burns down a company.)

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 07, 2022, 06:17:32 pm
content: Only considering to use parts from RS components.Here are the two I’m looking to order from.Option 2: is to understand how I can DIY a reset rod To use the existing thermostat

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 08, 2022, 10:20:29 am
content: Slight over estimation it is only a 10cm gap the reset rod needs to account for.However it needs to be non conductive and tolerate at least 250 degree C.Any thoughts on what to use

author: aqibi2000
author_rank: Regular Contributor
timestamp: October 08, 2022, 11:24:29 am
content: Need some help to find a AK395 as advised it’s the original part required to fix the oven as it was intended.Can’t find it in stock anywhere