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KSD301 Temperature Limit Switch
KSD301 realizes temperature control through bimetallic temperature sensing element: When the temperature of the equipment reaches the preset action temperature, the bimetallic strip is deformed by heat and instantly drives the contact to disconnect the circuit; after the temperature drops to the reset temperature, the contact automatically closes and resumes power.
KSD301 is a widely used bimetallic temperature-controlled Limit switch, mainly used for overheat protection or temperature control of electrical equipment. Its main features and information are as follows:
jag. Core Principle
KSD301 realizes temperature control through bimetallic temperature sensing element: When the temperature of the equipment reaches the preset action temperature, the bimetallic strip is deformed by heat and instantly drives the contact to disconnect the circuit; after the temperature drops to the reset temperature, the contact automatically closes and resumes power.
Ii. Key Parameters
Parametrar |
Typical values | Anmärkningar |
Rated voltage/current | AC 250V / 5A、10A、15A、16A | Applicable to resistive loads |
Åtgärdstemperaturintervall | 40°C–250°C | 5°C steps available |
Temperature accuracy | ±2℃、±3℃、±5℃、±10℃ | Depending on the model |
Reset temperature difference | 8–100℃ (anpassningsbar) | Action and reset temperature difference |
Kontaktmotstånd | ≤50mΩ | |
Insulation resistance | ≥100MΩ | |
Mechanical life | ≥100 000 gånger |
III. Specifications and Types
Contact Form
Normal Closed (NC): The contact disconnects when the temperature rises (most commonly used).
Normal Open (INGA): The contact connects when the temperature rises.
Mounting Structure
Bent-leg/flat-angle terminals are optional (remarks are required when placing an order).
Skyddsnivå: IP00 (metal enclosure grounded).
Iv. Typical Applications
Household appliances: vattenautomater, riskokare, desinfektionsskåp, mikrovågsugnar, kaffemaskiner.
Industrial equipment: luftkonditioneringsapparater, laminatorer, elektriska värmeapparater.
Automotive field: diesel filter heating system.
V. Procurement and selection
Temperature marking: The required operating temperature (such as 85°C, 125°C) and contact type must be specified when purchasing.
Tip: The operating temperature tolerance and reset temperature difference must be confirmed according to the specific model. The tolerance of some high-precision models is as low as ±2°C.
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