Datasheet
A1 NTC Thermistor
A1 NTC Thermistor
Description:
Leadless chip NTC thermistor with top and bottom silver metalized contacts. Available in a variety of R-T Curve and R25 values. RoHS compliant without exemptions - lead and cadmium free.
Features:
- Suitable for die mounting with conductive epoxy
- Exceptional stability and reliability
- RoHS compliant without exemptions
- Available in point-matched tolerances from 0° C to 100° C
The A1 leadless NTC thermistor offers a lower cost option to the gold-terminated A2 series. This configuration is ideal for mounting on hybrid substrates, integrated circuits, or printed circuit boards for temperature compensation or over-temp protection. Contact us at info@northstarsensors.com for assistance with your unique application.
Applications:
- Automotive
- Infrared detectors
- Industrial controls
- Small package electronics
- Tunable lasers and optical filters
- Cold junction compensation
A1 NTC Thermistor
Typical Configurations:
| Part Number | Resistance at 25 °C |
Resistance Tolerance |
Die Size LxWxH |
R/T Curve |
25 °C / 85 °C β |
|---|---|---|---|---|---|
| A1A103R44P2W | 10 kΩ | ±2% at 25 °C | 0.017” x 0.017” x 0.005” ( 0.43 x 0.43 x 0.13 mm ) | 44 | 3978 |
| A1B303R43P5W | 30 kΩ | ±5% at 25 °C | 0.027” x 0.027” x 0.011” ( 0.69 x 0.69 x 0.28 mm ) | 43 | 3943 |
| A1D102R38P5W | 1 kΩ | ±5% at 25 °C | 0.034” x 0.034” x 0.011” ( 0.86 x 0.86 x 0.28 mm ) | 38 | 3486 |
A wide variety of configurations are possible. Contact us at
info@northstarsensors.com for assistance with your unique application.
Other Specifications:
| Recommended Operating Temperature | -50 °C to 100 °C |
|---|---|
| Recommended Measurement Current | < 50 µA when mounted |
| Time Constant | ~ 100 ms unmounted in stirred liquid |
| Dissipation Constant | ~ 0.3 mW / °C umounted in ambient air |
| RoHS and REACH | Compliant |
Resistance vs Temperature Conversion Tables
| °C | CURVE 38 | CURVE 43 | CURVE 44 | |||
|---|---|---|---|---|---|---|
| Ω RATIO | NTC | Ω RATIO | NTC | Ω RATIO | NTC | |
| RT / R25 | (%/°C) | RT / R25 | (%/°C) | RT / R25 | (%/°C) | |
| 0 | 2.815 | -4.46 | 3.1660 | -4.94 | 3.2651 | -5.11 |
| 5 | 2.260 | -4.33 | 2.4815 | -4.80 | 2.5393 | -4.95 |
| 10 | 1.826 | -4.20 | 1.9583 | -4.67 | 1.9901 | -4.80 |
| 15 | 1.485 | -4.07 | 1.5556 | -4.54 | 1.5712 | -4.66 |
| 20 | 1.215 | -3.95 | 1.2434 | -4.42 | 1.2493 | -4.52 |
| 25 | 1.000 | -3.84 | 1.0000 | -4.30 | 1.0000 | -4.39 |
| 30 | 0.8276 | -3.73 | 0.80892 | -4.18 | 0.80567 | -4.26 |
| 35 | 0.6885 | -3.63 | 0.65804 | -4.07 | 0.65314 | -4.14 |
| 40 | 0.5758 | -3.53 | 0.53820 | -3.97 | 0.53266 | -4.02 |
| 45 | 0.4840 | -3.43 | 0.44249 | -3.87 | 0.43689 | -3.91 |
| 50 | 0.4087 | -3.33 | 0.36563 | -3.77 | 0.36031 | -3.81 |
| 55 | 0.3467 | -3.24 | 0.30357 | -3.67 | 0.29857 | -3.71 |
| 60 | 0.2954 | -3.16 | 0.25323 | -3.58 | 0.24869 | -3.61 |
| 65 | 0.2528 | -3.07 | 0.21219 | -3.49 | 0.20816 | -3.51 |
| 70 | 0.2172 | -2.99 | 0.17858 | -3.41 | 0.17508 | -3.42 |
Please visit northstarsensors.com/temperature-curves
for additional tables