KSD301-R-G series snap-action thermostat is a kind of miniature hermetically sealed bimetal disc thermostat (1/2" disc). It is of single-pole single-throw structure and works under resistive load. Thisbimetal switch is in wide use in a great variety of compact type home appliances, such as coffee maker, water dispenser, toaster, microwave oven, electric pad and portable icebox etc., to provide temperature control or temperature protection.(cut off thermostat) 

Advantages:

• Easy mounting.
• Rapid heat transmission.
• High durability.
• No breakdown, no flashover.
• Every product will be tested, extremely high temperature pass rate.
• High precision.

Parameter: 

Use

Temperature control/Overheat protection

Appliance

Coffee maker/ Drinking machine/toaster/Microwave oven/ Heating/ Portable Refrigerator/etc

Reset type

Manual

Base material

Ceramic base

Amperage

5A/10A/16A

Max. Operating Temperature

220°C

Differential

Refer to the regulation

Tolerance

Refer to the regulation

Protection class

IP00

Contact material

Silver/Gold

Dielectric Strength

Parts between electriferous components and non-electriferous ones can bear 2000V (3750V for Reinforced insulation type) 50Hz AC current, which is nearly sine wave, for one minute as bearing test. Resulted no breakdown, no flashover.

Insulation

Resistance

With a DC 500V megger, borne DC 500V, the tested value is over 10MW.

Resistance

Between Terminals

Below 50mW

Temp. characteristics:

Normal type: OFF temperature higher than ON temperature.(Normal close)

One-shot type: The thermostat switches on at room temperature and it won’t be able to reset after switching off.

Maximum 

ambient 

temperature

280°C(Long period)

310°C (Less than 15 min)

Diameter of

bimetal disc

F12.8mm(1/2″)

Approvals

UL/CQC/TUV

Terminal type

Customized (Refer to our specification)

Cover/Bracket

Customized (Refer to our specification)

Installation and Direction for Use:

• Method of earth: By means of the metal cup of thermostat connected in the earthing metal part.
• The thermostat should work in environment with humidity not higher than 90%, free of caustic, flammable gas and conducting dust.
• When the thermostat is used to sense the temperature of solid items, its cover should be clung to the heating part of such items. Meanwhile, heat-conducting silicon grease, or other heat media of similar nature, should be applied to the cover’s surface.
• If the thermostat is used to sense the temperature of liquids or steam, it is strongly recommended to adopt a version with stainless-steeled cup. Moreover, cautious measures should be taken to prevent liquids getting into/onto the thermostat’s insulation parts.
• The top of the cup must not be pressed to sink, so as to avoid adverse effect on the thermostat’s temperature sensitivity or its other functions.
• Liquids must be kept out of the thermostat’s inner part! The base must avid any force that could lead to crack; it should be kept clear and away from the pollution of electric substance to prevent insulation weakening that leads to short-circuited damages.
• The terminals should be bent, or else, the reliability of electric connection will be influenced.

Major series of snap-action thermostats are as follows:

Series

Diameter of bimetal disc

Max. operating  Temp.

Max.

Switch structure

Service purposes 

rated

current

KSD301

F12.8mm

(1/2″)

280°C

16A

SPST

Temperature control and overheating protection for low-duty electric heating applications.

KSD301-U

F12.8mm

(1/2″)

280°C

16A

SPST

One shot type fuse for low-duty electric heating applications.

KSD302

F22.25mm

(7/8″)

125°C

25A

SPST

Temperature control and overheating protection for high-duty electric heating applications.

KSD303

F12.8mm

(1/2″)

50°C

10A

SPST

Defrosting and temperature compensation for refrigerator.

KSD305

F22.25mm

(7/8″)

KSD307

F12.8mm (1/2″)

220°C

20A

SPST

PTC power cut out for electric heater, commercial appliance

KSD309

F12.8mm

(1/2″)

280°C

16A

SPST

Temperature control and overheating protection for high temperature heating applications.

KSD310

F19mm

(3/4″)

50°C

35A

SPST

Defrosting for big current refrigerator, air conditioner or other commercial cooling appliances

KSD314

F19mm

(3/4″)

220°C

45A

SPST

Temperature control and overheating protection for big current heating applications.

KSD315

F19mm

(3/4″)

125°C

16A

DPST

Manual reset for water heater protection