Ceramic and Bakelite KSD301 Temperature Switch

The following is a core comparison and selection guide for ceramic and Bakelite ‌KSD301 temperature switches. Comprehensive technical parameters and application scenario analysis:
1. Comparison of core material characteristics‌

Features‌	Ceramic material	Bakelite material
‌Temperature resistance limit‌	>300攝氏度 (long-term stability)	≤150℃ (easy to deform and age above 160℃)
‌Thermal conductivity‌	High thermal conductivity (20-30W/m•K), 響應速度快	Low thermal conductivity (about 0.3W/m•K), delayed response
‌Insulation strength‌	Breakdown voltage ≥10kV, strong electrical isolation	Low breakdown voltage (depends on thickness)
Corrosion resistance	Resistant to chemical corrosion, suitable for acid and alkali environment	Suitable to organic solvent erosion
Mechanical strength	High hardness (Mohs 7), wear resistance	Medium strength, easy to process

‌Tip‌: 150℃ is the material selection demarcation point. Ceramic models (such as KSD302) are mandatory above this temperature.

KSD301 SPECIFICATION，Ceramic and Bakelite KSD301 parameter download

Comparison between bakelite KSD301 and ceramic KSD302

Bakelite KSD301 temperature switch

Ceramic KSD302 temperature switch

2. Models and applicable scenarios‌

Parameters‌	Ceramic model (such as KSD302)	Bakelite model (KSD301型)
‌Action temperature range‌	45℃~300℃ (supports ultra-high temperature control)	40℃~250℃ (conventional temperature range)
‌Typical applications‌	– Industrial furnace, motor overheat protection – Automobile engine heating system – High temperature disinfection equipment	– 飲水, coffee machine (<100攝氏度) – Small household appliance circuit board – Low voltage heater
‌Protection level‌	IP00防護等級 (metal shell grounding)	IP00防護等級 (plastic shell)

3. Selection considerations‌

‌Temperature sensitivity‌
If the instantaneous temperature of the equipment may be greater than 150℃ (such as motor stalling, 乾燒), the ceramic model must be selected to avoid Bakelite melting and short circuit.
‌Cost and maintenance‌
The unit price of the Bakelite model is low (about ¥1.3~2.5), and the ceramic model is 30%~50% more expensive but has a longer life.
‌Installation compatibility‌
Pay attention to the brittleness of the ceramic model to avoid mechanical extrusion; the Bakelite model is prohibited from welding terminals (high temperature damage).

‌Fourth, Operation Suggestions‌
mermaid Copy Code
graph LR
一個[Equipment operating temperature] –>|≤150℃| B[Select bakelite KSD301]
一個 –>|＞150℃| C[Select ceramic KSD302]
B –> D[Check load current ≤15A]
C –> E[Reserve heat dissipation space]

▶️ ‌Summary‌: The bakelite model is cost-effective and suitable for daily household appliances; the ceramic model is just needed in high temperature and corrosive scenes and is more reliable for long-term use.