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Specifications
Resistance @ 25℃:
100kΩ
Power(Watts):
100mW
Operating Temperature:
-40℃~+125℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
100uA
Thermal Time Constant:
5s
B Constant (25℃/85℃):
3987K
B Constant (25℃/75℃):
-
B Constant Tolerance:
±1%
B Constant (25℃/50℃):
3950K
Mfr. Part #:
CMFA 104F3950
Package:
0603
Key Attributes
Model Number:
CMFA 104F3950
Product Description
Product Overview
The CMFA 104F3950 is a chip NTC thermistor from Nanjing Shiheng Electronic Technology Co., Ltd. Designed for a wide operating temperature range of -40 to +125, this component offers precise temperature sensing capabilities with a nominal zero-power resistance of 100k at 25 and a B constant of 3950K (25/50). Its compact 0603 (A) size (1.6x0.8mm) makes it suitable for various electronic applications requiring accurate temperature monitoring and control.
Product Attributes
- Brand: Shiheng
- Manufacturer: Nanjing Shiheng Electronic Technology Co., Ltd.
- Product Type: Chip NTC Thermistor
- Series: CMF
- Origin: China
Technical Specifications
| Part Number | Type | External Dimensions (LW) | Nominal Zero-Power Resistance at 25 (k) | Tolerance of Resistance | B Constant (25/50) (K) | B Constant (25/85) (K) | Permissible Operating Current at 25 (mA) | Dissipation Factor (mW/) | Thermal Time Constant (s) | Rated Electric Power at 25 (mW) | Operating Ambient Temperature () |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CMFA 104F3950 | CMF A (0603) | 1.60.8 mm | 100 | F (1%) | 3950 | 3987 | 0.10 | 1.0 | <5 | 100 | -40+125 |
Dimensions (0603/A Series)
| 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] |
R-T Table (R25=100k1%, B(25/50)=39501%, B(25/85)=4010)
| Temperature (C) | R_Min (Kohm) | R_Cent (Kohm) | R_Max (Kohm) | Res TOL. | Temp. TOL.(C) |
|---|---|---|---|---|---|
| -40 | 3,084.269 | 3,225.545 | 3,372.955 | 4.57% | 0.67 |
| -39 | 2,892.785 | 3,023.332 | 3,159.454 | 4.50% | 0.66 |
| ... | ... | ... | ... | ... | ... |
| 150 | 1.646 | 1.731 | 1.821 | 5.18% | 2.27 |
Recommended Soldering Technologies
Re-flowing Profile
- Ramp: 1~2C/sec.
- Pre-heating: 150~190C/9030 sec.
- Time above 240C: 20~40 sec.
- Peak temperature: 260C Max./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: 150C/60 sec.
- Soldering Tip temperature: 350C Max.
- 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: -10C40C
- 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 (such as chlorine, sulfurated hydrogen, ammonia, sulfuric acid, nitric oxide and so on), volatile or inflammable atmospheres, dusty condition, excessive high or low pressure condition, humid site, places with brine, oil, chemical liquid or organic solvent, intense vibration, and places with 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.
2109061130_Nanjing-Shiheng-Elec-CMFA-104F3950_C2889051.pdf
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