1. What is KSD301 thermal switch?
KSD301 Thermal switch is a small bimetal snap-action thermal
protector with shell.
Action principle is that the component bimetal disc jump at the
change of temperature, the contact point can be closed/opened
rapidly to connect/disconnect the circuit, to protect the machine
or machine operators, or to control the temperature.
A wide range of temperature, low temperature till high temperature,
can be set according to customer requirements.
Cap/Case material, Bracket type/Terminal Orientation/Terminal Size
could be customized based on actual demand.
2. Specification.
| Model name | T24 KSD301 Thermal Switch |
| Application | Household, Office, Electrical/Industrial, Communication |
| Contact type | Manual Reset |
| Height | 12.6mm |
| Electrical Rating | 16A/250V AC, 15A/125V AC, 10A/250V AC |
| Operating temperature | 0℃~250℃ |
| Temperature Tolerance | ±3℃ or more(depend on customer) |
| Differential | 8℃ or more(depend on customer's demand.) |
| Endurance | 100,000 cycles or more |
| Case material | Phenolic |
| CAP material | Aluminum |
| Bracket material | Stainless steel |
| Terminal Material | Copper |
| Terminal Orientation | 90° |
| Terminal Size | 4.75mm(0.187inch) |
| Circuit Resistance | 50mΩ or less |
| Insulation Resistance | 100MΩ or more(DC 500V) |
| Dielectric Strength | AC 1,450V for 1 min. |
More bracket/Terminal types,case material options are as below. We
would like to cooperate customer for new design.
3. Attentions about thermal switch installation.
1). During KSD301 thermal switch using process, need to avoid
moisture and pollution, otherwise it will affect the electrical
performance of the product. Recommended KSD301 thermal switch
working environment is that relative humidity ≤90%, no contact with
corrosive and flammable things.
2). During KSD301 thermal switch installation, need high attention
that the temperature-sensitive surface should not be deformed, and
the top of the cap should not be collapsed or deformed, so as not
to affect the temperature performance and electrical performance of
the product.
3). During KSD301 thermal switch installation, need to make sure
the switch’s temperature-sensing surface to be evenly contacted
with the temperature-controlling part, and the force should be
evenly applied to stabilize the temperature-sensing. Besides, need
to coat the surface of temperature-sensitive with thermal grease or
other similar heat-conducting medium.
4). During KSD301 thermal switch installation, the terminals should
not be bent vigorously, and the connections between terminal and
wire should be in good contact, otherwise the electrical contact
reliability will be affected.
5). When select KSD301 thermal switch, need to confirm the accurate
temperature. To avoid temperature changes caused by thermal
inertia, thermal conduction and other factors, need to consider the
following factors.
a. Detection part of temperature control.
b. Thickness and material of heat transfer component.
c. The power of the heating element.
d. Amount of heated medium.
e. Ambient temperature and air pressure.
6). Manual reset thermal switch can only be reset after the
temperature drops at least 20℃; And when reset, the force should be
moderate, to just can make the thermostat reset as appropriate
(about 5~6N), otherwise there is an impact on the temperature.
7). During using process, need high attention to avoid cracks
caused by the large force on the case inside, and liquid penetrates
into the thermostat. Keep the case clean to prevent the insulation
performance from decreasing or even short circuit breakdown after
the thermostat polluted by the conductive medium.
8). Thermal Switch shall be installed with cap connected with the
grounding metal parts or the power grounding wire of the equipment
to reduce the electromagnetic radiation and interference signals of
the complete machine.
9). When using KSD301 thermal switch, recommend to choose following
wires considering rated current:
| Rated current | Traverse area | UL wire gauge | Rated current | Traverse area | UL wire gauge |
| ≤3A | 0.3 mm² | AWG22 | ≤15A | 2.0 | AWG14 |
| ≤5A | 0.5 mm² | AWG20 | ≤20A | 3.5 | AWG12 |
| ≤7A | 0.75 mm² | AWG18 | ≤30A | 5.5 | AWG10 |
| ≤12A | 1.25 mm² | AWG16 | -- | -- | -- |
10). The operating temperature of thermal switch is tested at the
rate of 1℃/min in the hot air circulating oven. Therefore, when
select the thermostat, you can choose the temperature according to
your operating conditions. We recommend that you confirm that
through both normal and abnormal status.
4. About us.
Light Country was founded in 1985 in Taiwan.
We dedicate on KSD301 thermal switch and rocker switch.
These parts are widely used in household appliance, electrical
products, industrial facilities, medical devices, etc.
To provide customer best service, we’re with integration of
R&D, production, sales and post-sales as well.
Our factory already got ISO9001, ISO14001, IATF16949 certificates.
Our products already got CQC, UL/CUL, VDE, TUV, SEMKO, NEMKO
certificates, comply with ROHS/REACH regulations.
We promise high quality products, timely delivery, attentive
service, effective improvements.
Thanks for your time, please feel free to contact us via below
ways,
Sales: Thomas Lee/Julie Liu
Tel: +86 138 6234 1050
Mail: lixin@liangqundianzi.cn or ksd301@aliyun.com.cn
WhatsApp: +86 15850802713
