Hva er normalt åpen (INGEN) Termostatbryter KSD301?

Termostatbryteren KSD301 bimetallskiven fungerer i en normalt åpen (INGEN) konfigurasjon. Dette betyr at kretsen i utgangspunktet er åpen (koblet fra) ved normale temperaturer. Når temperaturen stiger til en forhåndsdefinert terskel, bimetallskiven bøyer seg, lukke kretsen og tillate strømflyt.

Normally open THERM-O-DISC T-O-D THERMAL LIMIT SWITCH L160-40F 60TX01

UL/CUL KSD301 Shutoff Thermostat,Normally Open NO Bimetal Snap Disc 125V 16A Auto Reset

uxcell KSD301 Termostat 40°C/104°F 10A Normalt åpen N.O Juster Snap Disc Temperaturbryter

jeg. Core Features
‌Operation Principle‌
When the temperature rises to the set value, the contact automatically connects the circuit; when the temperature drops to the reset value, the contact automatically disconnects the circuit, which is the opposite of the normally closed type (disconnected when the temperature rises and connected when the temperature drops).

The bimetallic strip is heated and deformed to trigger the mechanism to achieve fast switching.

‌Technical Parameters‌
‌Electrical Specifications‌:
Nominell spenning: AC 250V (resistiv belastning) or AC 125V (UL standard)
Merkestrøm: 5A/10A/15A (resistiv belastning)
‌Temperature performance‌:
Action range: 0℃~300℃ (kan tilpasses), accuracy ±2℃~±10℃17
Reset and action temperature difference: 8℃~100℃ (adjustable)
‌Mechanical characteristics‌:
Kontaktmotstand: ≤50mΩ, isolasjonsmotstand: ≥100MΩ13
Elektrisk styrke: AC 1800V/1min without breakdown
Levetid: ≥100,000 times17 (some models up to 150,000 times2)

‌Physical characteristics‌
Beskyttelsesnivå: IP00 (no dust and water resistance)
Kablingsmetode: plug-in terminal 250# eller 187# (angle 0°~90° optional)
Installasjonsmetode: supports various structures such as movable ring, flat ring, aluminum cover with holes, osv.

Normally Open State:
The KSD301 is designed to have its contacts in an open state when the surrounding temperature is below the specified operating temperature. This means the circuit connected to the KSD301 is broken, preventing current flow.

Temperature Trigger:
Når temperaturen øker, the bimetallic disc (made of two different metals bonded together) responds to the temperature change. The two metals expand at different rates, causing the disc to bend.

Circuit Closure:
When the temperature reaches the set point, the disc bends enough to close the circuit, establishing a connection between the contacts. This allows current to flow through the circuit.

Automatisk tilbakestilling:
Once the temperature drops below a certain level, the bimetallic disc returns to its original shape, opening the circuit again and cutting off the current flow. This is an automatic reset feature.
I hovedsak, the KSD301 is used as a thermal switch to control current flow based on temperature, acting as a temperature sensor and protector for various applications.

II. Application scenarios
‌Husholdningsapparater‌: vanndispensere, electric thermos, mikrobølgeovner, desinfeksjonsskap, elektriske varmeovner, Kaffemaskiner, osv.
Industrielt utstyr: motor overheat protection, rectifier equipment, lamineringsmaskiner, car heated seats, etc.57.

III. Detection method (determine whether it is normally open)
‌Multimeter detection‌:
Ved romtemperatur (‌below the action temperature‌): the resistance of the two pins should be infinite (åpen krets).
After heating (‌above the action temperature‌): the resistance value drops to ‌tens of ohms‌ (åpen krets).
‌Marking distinction‌: The product body is usually marked with “INGEN” (Normalt åpen) eller “Normalt åpen”.

IV. Product advantages
Rask responshastighet, clean contact action without arcing57;
Høy temperaturkontrollnøyaktighet, strong reliability7;
Compact structure, strong adaptability17.

⚠️ Note: The actual selection needs to confirm the specific temperature threshold (such as 85℃, 95℃, etc.) and the reset temperature difference. The parameters of different models may vary.