KSD9700 temperature control switch thermal protector thermostat
KSD9700 thermal protector is composed of heat-conducting PBT shell, bimetallic element with silver alloy contacts, conductive bracket, insulating fixed seat, static contact and heat-resistant wire. The fully enclosed structure can protect the components from dust or impurities, prevent the penetration of paint and damage by external forces. Since the shell is a metal conductor, it is equipped with a heat-conducting and temperature-resistant insulating sleeve when in use. When the current passes through the bimetallic element with impedance, when it encounters abnormal operation, as the current increases or the ambient temperature rises to the set temperature value, the bimetallic element quickly acts, opens the contact and cuts off the circuit. When the device cools to a safe operating temperature, the contact automatically closes and resumes normal operation. It is widely used in motor overheating protection caused by abnormal working conditions such as overload and stall of single-phase and three-phase motors, and is also suitable for overheating protection and temperature control of general electrical appliances such as choke coils, spiral vacuum tubes and transformers.
1 Product Application
KSD9700 thermal protector has the characteristics of shell insulation, sensitive action and long life. It is widely used in fractional horsepower motors, electric heating appliances, fluorescent lamp ballasts, transformers, automobile motors, integrated circuits and general electrical equipment for dual protection against overheating and overcurrent. When using contact temperature sensing installation, the product should be close to the installation surface of the controlled device. During installation, the shell should not be collapsed or deformed by force to avoid affecting its performance.
2 Appearance and structure:
| Serial number | Part name | Material name | Serial number | Part name |
| 1 | Housing | PBT/SPCC | 5 | Mounting seat |
| 2 | Base plate | SPCC | 6 | Static contact |
| 3 | Bimetallic strip | P30R | 7 | Epoxy resin |
| 4 | Moving contact | AgNi10/BZn | 8 | Wire |
3. Performance
3.1 Technical parameters
① Contact form: 1D or 1H
② Contact load: 5A220VAC 10A 220VAC 16A 220VAC or 24VDC 12VDC
③ Insulation resistance: ≥100MΩ at normal temperature and humidity
④ Contact resistance: ≤100 mΩ
⑤ Dielectric withstand voltage: ≥1000VAC
⑥ Vibration intensity: 50HZ single amplitude 0.35mm
⑦ Impact strength: 150m/S2
⑧ Weight <3g
3.2 Disconnection temperature: 10～240℃, reset temperature -20～210℃.
| Disconnect Temperature | Reset Temperature | Disconnect Temperature | Reset Temperature |
| 15±5℃ | ≥-15±10℃ | 130±5℃ | ≥100±10℃ |
| 20±5℃ | ≥-10±10℃ | 135±5℃ | ≥105±10℃ |
| 25±5℃ | ≥-5±10℃ | 140±5℃ | ≥110±10℃ |
| 30±5℃ | ≥0±10℃ | 145±5℃ | ≥115±10℃ |
| 35±5℃ | ≥5±10℃ | 150±5℃ | ≥120±10℃ |
| 40±5℃ | ≥10±10℃ | 155±5℃ | ≥125±10℃ |
| 45±5℃ | ≥15±10℃ | 160±5℃ | ≥130±10℃ |
| 50±5℃ | ≥20±10℃ | 165±5℃ | ≥135±10℃ |
| 55±5℃ | ≥25±10℃ | 170±5℃ | ≥140±10℃ |
| 60±5℃ | ≥305±10℃ | 175±5℃ | ≥145±10℃ |
| 65±5℃ | ≥35±10℃ | 180±5℃ | ≥150±10℃ |
| 70±5℃ | ≥40±10℃ | 185±5℃ | ≥155±10℃ |
| 75±5℃ | ≥45±10℃ | 190±5℃ | ≥160±10℃ |
| 80±5℃ | ≥50±10℃ | 195±5℃ | ≥165±10℃ |
| 85±5℃ | ≥55±10℃ | 200±5℃ | ≥170±10℃ |
| 90±5℃ | ≥60±10℃ | 205±5℃ | ≥175±10℃ |
| 95±5℃ | ≥65±10℃ | 210±5℃ | ≥180±10℃ |
| 100±5℃ | ≥70±10℃ | 215±5℃ | ≥185±10℃ |
| 105±5℃ | ≥75±10℃ | 220±5℃ | ≥190±10℃ |
| 110±5℃ | ≥80±10℃ | 225±5℃ | ≥195±10℃ |
| 115±5℃ | ≥85±10℃ | 230±5℃ | ≥200±10℃ |
| 120±5℃ | ≥90±10℃ | 235±5℃ | ≥205±10℃ |
| 125±5℃ | ≥95±10℃ | 240±5℃ | ≥210±10℃ |
3.3 Dimensions:
5A/10A: Metal housing: 20×7.4×3.8mm 15×6.4×3.1 (excluding insulating sleeve)
Plastic housing: 20×7.4×3.8mm 15×7×3.5mm
Ceramic housing: 20×8.5×5mm
16A: Metal housing: 21.5×8×4.25mm (excluding insulating sleeve)
3.4 Tensile test:
The lead end of the product should be able to withstand a tensile force greater than or equal to 20N, and the wire should not break or slip out.
3.5 Insulation voltage:
a. The lead wires of the product should be able to withstand AC660V when disconnected, and last for 1min without breakdown and flashover;
b. The lead wires of the product and the insulating housing can withstand AC1800V, and last for 1S without breakdown and flashover;
3.6 Insulation resistance:
Under normal conditions, the insulation resistance between the lead wire and the insulating housing is above 100MΩ. (The meter used is a DC500V megohmmeter)
3.7 Contact resistance:
The contact resistance of the product should not exceed 50mΩ.
There are also these:
Rechargeable battery packs, lithium battery protection boards
Curtain motors, tubular motors, electric motors (electric tools, etc.) PC circuit boards, temperature sensing cables
Heating pads, medical pads, electric blankets, electric heating clothing
Fluorescent lamp ballasts, transformers, etc.
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