Thermistor 102J 1K Ohm

The Thermistor 102J 1K Ohm is a temperature-sensitive resistor with a nominal resistance of 1 kΩ, marked with the code 102J. Its resistance changes noticeably as it warms up or cools down, so measuring the resistance tells you the temperature. Thermistors are small, low cost and quick to respond, which makes them popular for temperature sensing, over-heat protection and fan control.

Thermistor 102J 1K Ohm Specifications

• Nominal resistance: 1 kΩ (1,000 ohms), normally specified at 25 °C
• Value code: 102 = 10 followed by 2 zeros, in ohms
• Tolerance code: J = ±5%
• Type: thermistor (temperature-dependent resistor)
• Leads: 2, no polarity
• Pack size: 1 piece

Thermistor 102J 1K Ohm Applications

• Temperature measurement with Arduino and ESP32 analog inputs
• Over-temperature protection for power supplies, chargers and motors
• Thermostats and fan speed control
• Battery pack and heatsink temperature monitoring
• Electronics lab experiments with sensors

What's in the Box

• 1 × 1 kΩ (102J) thermistor

Tip: Wire it in a voltage divider with a fixed 1 kΩ resistor between 5 V (or 3.3 V) and GND and read the midpoint with an analog input; at 25 °C you will read about half the supply. Check with a multimeter which way the resistance moves when you warm it with your fingers (it falls for an NTC type and rises for a PTC type), then calibrate against a known thermometer.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.