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Specifications
Resistance @ 25℃:
10kΩ
Power(Watts):
100mW
Operating Temperature:
-40℃~+125℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
310uA
Thermal Time Constant:
5s
B Constant (25℃/85℃):
3987K
B Constant (25℃/75℃):
-
B Constant Tolerance:
-
B Constant (25℃/50℃):
3950K
Mfr. Part #:
CMFA 103F3950
Package:
0603
Key Attributes
Model Number:
CMFA 103F3950
Product Description
Product Overview
The CMFA series chip NTC thermistors from Nanjing Shiheng Electronic Technology Co., Ltd. are designed for accurate temperature sensing applications. These components offer reliable performance with various resistance values and B constants, making them suitable for a wide range of industrial and electronic equipment. They are characterized by their small form factor, precise electrical characteristics, and robust construction, ensuring stable operation across a broad temperature range.
Product Attributes
- Brand: Shiheng ()
- Origin: Nanjing, China
- Product Type: Chip NTC Thermistor
Technical Specifications
| Part Number | Type | External Dimensions (LW) | Nominal Zero-Power Resistance (25) | Tolerance of Resistance | B Constant (25/50) (K) | B Constant (25/85) (K) | Permissible Operating Current (25) (mA) | Dissipation Factor (mW/) | Thermal Time Constant (s) | Rated Power (25) (mW) | Operating Ambient Temperature () |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CMFA 103F3950 | CMF (Chip NTC Thermistor) | A(0603): 1.60.8 mm | 10k (103) | 5% (J) | 3950 | 3987 | 0.31 | 1.0 | <5 | 100 | -40+125 |
Dimensions (Table 1)
| Type | L | W | T | a | B | C | |
|---|---|---|---|---|---|---|---|
| A[0603] | 1.60.15 [0.0630.006] | 0.80.15 [0.0310.006] | 0.80.15 [0.0310.006] | 0.30.2 [0.0120.008] | [0.6-0.8] | [0.6-0.7] | [0.6-0.8] |
Recommended Soldering Technologies
Re-flowing Profile
- Ramp: 1~2/sec.
- Pre-heating: 150~190/9030 sec.
- Time above 240: 20~40 sec.
- Peak temperature: 260Max./10 sec.
- Solder paste: Sn/3.0Ag/0.5Cu
- Max. 2 times for re-flowing.
Iron Soldering Profile
- Iron soldering power: Max. 30W
- Pre-heating: 150/60 sec.
- Soldering Tip temperature: 350Max.
- Soldering time: 3 sec Max.
- Solder paste: Sn/3.0Ag/0.5Cu
- Max. 1 time for iron soldering.
[Note: Take care not to apply the tip of the soldering iron to the terminal electrodes.]
Storage Conditions
- Storage Temperature: -1040
- Relative Humidity: 75%RH
- Keep away from corrosive atmosphere and sunlight.
- Period of Storage: 6 Months
Notes & Warnings
- The series thermistors shall not be operated and stored under the following environmental conditions: Corrosive or deoxidized atmospheres, volatile or inflammable atmospheres, dusty condition, excessive high or low pressure, humid site, places with brine, oil, chemical liquid or organic solvent, intense vibration, or analogously deleterious conditions.
- The ceramic body of the series thermistors is fragile; no excessive pressure or impact shall be exerted on it.
- The series thermistors shall not be operated beyond the specified Operating Temperature Range in the catalog.
R-T Table (Partial)
| Temperature () | R_Min (Kohm) | R_Center (Kohm) | R_Max (Kohm) | Resistance Tolerance (%) | Temperature Tolerance () |
|---|---|---|---|---|---|
| -40 | 329.927 | 345.275 | 361.300 | 4.64% | 0.67 |
| 25 | 9.900 | 10.000 | 10.100 | 1.00% | 0.23 |
| 85 | 0.967 | 1.000 | 1.033 | 3.35% | 1.09 |
2410121439_Nanjing-Shiheng-Elec-CMFA-103F3950_C2889049.pdf
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