Surface Mount CMF Chip NTC Thermistor Overview
NTC (Negative Temperature Coefficient) Thermistors are heat-sensitive semiconductor resistors whose resistance decreases as temperature increases. With a temperature coefficient of resistance ranging from -2%/k to -6%/k (approximately 10 times that of metal), these components respond to both environmental temperature changes and self-heating from current flow.
Key Applications
- Temperature Measurement: Gas meters, water heaters, electric kettles, electronic thermometers, calendars, clocks, and electronic gifts
- Temperature Control: Rechargeable battery monitoring in mobile phones, car phones, laptops, smart wearable devices
- Temperature Compensation: Transistors, ICs, and crystal oscillators in mobile communication equipment
Product Features
- Compact sizes: 0402, 0603, 0805, 1206 with lead-free design for high-density surface mounting
- Glass-encapsulated ceramic body provides excellent moisture resistance and high reliability
- Wide operating temperature range: -40℃ to +150℃
- High-precision resistance values: 2.2K, 4.7K, 10K, 22K, 33K, 47K, 56K, 68K, 100K, 220K, 330K, 470K, 560K
- Precision B-value constants: 3380, 3435, 3500, 3600, 3800, 3950, 4050, 4150, 4250, 4350 and others
- Resistance accuracy options: 0.5%, 1%, 2%, 3%, 5%
Dimensions (mm)
| Size |
L |
W |
T |
M |
| 0402 (1005) |
0.04±0.006 (1.0±0.15) |
0.02±0.004 (0.5±0.10) |
0.024max (0.60max) |
0.004min (0.10min) |
| 0603 (1608) |
0.063±0.006 (1.6±0.15) |
0.031±0.006 (0.8±0.15) |
0.037max (0.95max) |
0.004min (0.10min) |
| 0805 (2012) |
0.08±0.008 (2.0±0.20) |
0.05±0.008 (1.25±0.2) |
0.05max (1.25max) |
0.006min (0.15min) |
![CMF Chip NTC Thermistor dimensional diagram showing 0402, 0603, 0805 sizes]()
Technical Specifications
0402 Series SMD Thermistor Parameters
| Part No |
Resistance at 25°C (Ω) |
B-value 25/85°C (K) |
| CMFX39F103 |
10 |
3950 |
| CMFX40F473 |
47 |
4050 |
| CMFX40F104 |
100 |
4050 |
0603 Series Chip Thermistor Parameters
| Part No |
Resistance at 25°C (Ω) |
B-value 25/85°C (K) |
| CMFA34F103 |
10 |
3450 |
| CMFA39H103 |
10 |
3970 |
| CMFA39Z223 |
22 |
3900 |
| CMFA39F473 |
47 |
3950 |
| CMFA39F104 |
100 |
3950 |
0805 Series SMD NTC Thermistor Parameters
| Part No |
Resistance at 25°C (KΩ) |
B-value 25/85°C (K) |
| CMFB34G472 |
4.7 |
3435 |
| CMFB34G103 |
10 |
3435 |
| CMFB35F103 |
10 |
3550 |
| CMFC39Z223 |
22 |
3900 |
1206 Series Chip NTC Thermistor Parameters
| Part No |
Resistance at 25°C (KΩ) |
B-value 25/50°C (K) |
| CMFC32Z221 |
0.22 |
3200 |
| CMFC32Z331 |
0.33 |
3200 |
| CMFC32F471 |
0.47 |
3250 |
| CMFC32F681 |
0.68 |
3250 |
5G Electronics Applications
CMF Chip NTC Thermistors are ideal for 5G electronic equipment where multiple heat sources require precise temperature monitoring. Their compact surface-mount design allows flexible placement on substrates to manage temperature across CPUs, power ICs, and modules, ensuring optimal performance and preventing overheating in high-speed communication devices.
![CMF Chip NTC Thermistor application in 5G electronic circuit board]()
![CMF Chip NTC Thermistor close-up view showing component details]()
