Built for compact electronics
Leadless NTC chip thermistors are a strong fit for dense assemblies where size and response matter.
Flexible attachment methods
Lead attachment to the top surface can be achieved by wire bonding, conductive epoxy bonding, or soldering.
Stable, repeatable sensing
These parts are commonly specified for over-temperature protection and temperature compensation.
Downloads
North Star Sensors chip thermistors, or thermistors without leads, may be mounted on hybrid integrated circuits, integrated circuits, or printed circuit boards by conductive epoxy bonding or by soldering. Lead attachment to top surface of the thermistor die may be accomplished by wire bonding, conductive epoxy bonding, or soldering.
Typical applications for leadless NTC chip thermistors are for circuit over-temperature protection and/or temperature compensation. Because leadless NTC thermistors are uncoated, suitable protection must be provided for the thermistors during operation and storage.
North Star Sensors offers leadless devices across multiple series, including the A2 series leadless gold wire-bondable NTC thermistor and the A1 series leadless NTC thermistor. Technical information includes the Leadless NTC Thermistor Stability Study. If you are balancing footprint, attachment method, and curve selection, the team can help narrow the best option for your assembly.
Here are a few example part numbers and configurations for leadless NTC thermistors:
| Part Number | Resistance 25 °C |
Curve | Resistance Tolerance |
Die Size | Electrode | |
|---|---|---|---|---|---|---|
| A2A103R44P2W | 10,000 Ω | 44 | ±2% | 0.017" x 0.017" (L x W) |
0.005" (H) | Gold |
| A1B303R43P5W | 30,000 Ω | 43 | ±5% | 0.027" x 0.027" (L x W) |
0.011" (H) | Silver |
Go to page How to Select an NTC Thermistor for more explanation on part number codes.
Key Details
- Top and bottom surface electrode options
- Standard die sizes from 0.01 in x 0.01 in to 0.1 in x 0.1 in
- Bulk packaging and automation-friendly packaging available
- Point-matched R25 tolerances from ±10%, ±5% to ±2%
- R25 values from 100 Ω to 100,000 Ω
- Industry-standard R/T curves available
Contact us for custom NTC thermistor requirements.