KSD301 Normally Close (NC) Thermal Switch
250Vac 10A
Description:
The KSD301 is a compact, bimetallic thermal switch used for temperature control and overheating protection in a wide range of appliances. This version features a Normally Closed (NC) configuration — meaning the circuit remains closed (allowing current to flow) until the preset temperature is reached. At that temperature, the switch opens to stop the current flow. Once the temperature drops below the reset threshold, the switch automatically resets and closes the circuit again.
Available Temperatures:
40°C, 50°C, 70°C, 90°C, 100°C, 120°C
Technical Specifications:
- Model: KSD301
- Contact Type: Normally Closed (NC)
- Operating Voltage: 250V AC
- Rated Current: 10A
- Available Temperature Options: 40°C, 50°C, 70°C, 90°C, 100°C, 120°C
- Temperature Tolerance: ±5°C
- Reset Temperature: Typically 10°C to 30°C below switching temperature
- Reset Type: Automatic
- Contact Resistance: ≤50mΩ
- Insulation Resistance: ≥100MΩ at DC500V
- Dielectric Strength: AC1500V/min, no breakdown
- Material: Metal housing with ceramic or plastic insulation (depending on model)
- Dimensions: Approx. 15mm diameter × 12mm height
- Terminals: 6.3mm quick-connect tabs
- Mounting Style: Surface mount with holes
- Certifications: UL, VDE, CQC, RoHS compliant
Features:
- Fast and accurate temperature response
- Simple and compact design
- Long service life (≥100,000 cycles)
- Auto-reset function
- Easy installation in a variety of applications
Applications:
- Electric heaters
- Kitchen appliances (coffee machines, toasters, rice cookers)
- Temperature control panels
- Cooling fans and ventilation systems
- Motor and transformer thermal protection
- Industrial and DIY electronics
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