Changsha Purple Horn E-Commerce Co., Ltd.
| Resistance @ 25℃ | 50kΩ |
| Power(Watts) | 100mW |
| Operating Temperature | -40℃~+125℃ |
| Tolerance | ±1% |
| B Constant (25℃/100℃) | - |
| Steady State Current (Max) | 190uA |
| Thermal Time Constant | 5s |
| B Constant (25℃/85℃) | 3987K |
| B Constant (25℃/75℃) | - |
| B Constant Tolerance | - |
| B Constant (25℃/50℃) | 3950K |
| Description | NTC Thermistor 50kΩ Surface Mount 0805 |
| Mfr. Part # | CMFB 503F3950 |
| Package | 0805 |
| Model Number | CMFB 503F3950 |
View Detail Information
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Product Specification
| Resistance @ 25℃ | 50kΩ | Power(Watts) | 100mW |
| Operating Temperature | -40℃~+125℃ | Tolerance | ±1% |
| B Constant (25℃/100℃) | - | Steady State Current (Max) | 190uA |
| Thermal Time Constant | 5s | B Constant (25℃/85℃) | 3987K |
| B Constant (25℃/75℃) | - | B Constant Tolerance | - |
| B Constant (25℃/50℃) | 3950K | Description | NTC Thermistor 50kΩ Surface Mount 0805 |
| Mfr. Part # | CMFB 503F3950 | Package | 0805 |
| Model Number | CMFB 503F3950 |
Product Overview
This document outlines the specifications for the CMFB series of Chip NTC Thermistors manufactured by Nanjing Shiheng Electronics Technology Co., Ltd. These thermistors are designed for temperature sensing applications, offering precise resistance values at specified temperatures and reliable performance across a wide operating temperature range. They are suitable for various industrial and electronic applications requiring accurate temperature monitoring and control.
Product Attributes
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | CMFB 503F3950 |
| Date | 2020-07-15 |
| Rated Power (25) | 100 mW |
| Operating Ambient Temperature | -40 to +125 |
| Nominal Zero-Power Resistance at 25 (R25) | 50 k |
| B Constant (25/50) | 3950 K |
| B Constant (25/85) | 3950 K |
| Permissible Operating Current (25) | < 5 mA |
| Dissipation Factor (mW/) | 0.19 |
| Thermal Time Constant (s) | 1.0 |
| Type | L (inch[mm]) | W (inch[mm]) | T (inch[mm]) | a (inch[mm]) | A (inch[mm]) | B (inch[mm]) | C (inch[mm]) |
|---|---|---|---|---|---|---|---|
| [0805] | 0.0790.008 [2.00.2] | 0.0490.008 [1.250.2] | 0.0330.008 [0.850.2] | 0.0200.012 [0.50.3] | [1.0-1.1] | [0.6-0.7] | [1.0-1.2] |
| Component | Description |
|---|---|
| Type | CMF: Chip NTC Thermistor |
| External Dimensions (LW) | A[0603] 1.600.800.80, B[0805] 2.001.250.85 |
| 25 Zero-Power Resistance | 222 (2.2k), 503 (50k), 104 (100k) |
| Tolerance of Resistance | F (1%), G (2%), H (3%), J (5%) |
| B Constant | 3470 (3470K), 3950 (3950K), 4050 (4050K) |
Standard Atmospheric Conditions for Measurement/Test:
Ambient Temperature: 2015
Relative Humidity: 6520%
Air Pressure: 86 kPa to 106 kPa
Conditions for Doubtful Results:
Ambient Temperature: 252
Relative Humidity: 655%
Air Pressure: 86 kPa to 106 kPa
| Item | Standard | Requirements |
|---|---|---|
| Terminal Strength | IEC 60068-2-21 | No removal or split of the termination or other defects shall occur. |
| Resistance to Flexure | IEC 60068-2-21 | No visible damage. |R25/R25| 5% |
| Vibration | IEC 60068-2-80 | No visible damage. |
| Dropping | IEC 60068-2-32 | No visible damage. |
| Solderability | IEC 60068-2-58 | No visible damage. Wetting shall exceed 95% coverage. |
| Resistance to Soldering Heat | IEC 60068-2-58 | No visible damage. |R25/R25| 5%, |B/B| 2% |
| Temperature Cycling | IEC 60068-2-14 | No visible damage. |R25/R25| 3%, |B/B| 2% |
| Resistance to Dry Heat | IEC 60068-2-2 | No visible damage. |R25/R25| 5%, |B/B| 2% |
| Resistance to Cold | IEC 60068-2-1 | No visible damage. |R25/R25| 5%, |B/B| 2% |
| Resistance to Damp Heat | IEC 60068-2-78 | No visible damage. |R25/R25| 3%, |B/B| 2% |
| Resistance to High Temperature Load | IEC 60539-1 5.25.4 | No visible damage. |R25/R25| 5%, |B/B| 2% |
| Type | Tape Thickness (mm) | Tape Material | Quantity per Reel |
|---|---|---|---|
| 0201 | 0.50.15 | Paper Tape | 15K |
| X | 0.50.15 | Paper Tape | 10K |
| A | 0.80.15 | Paper Tape | 4K |
| B | 0.850.2 | Paper Tape | 4K |
Re-flowing Profile:
Ramp: 1~2/sec.
Pre-heating: 150~170/9030 sec.
Time above 240: 20~40 sec.
Peak temperature: 260 Max./10 sec.
Solder paste: Sn/3.0Ag/0.5Cu
Max. 2 times for re-flowing.
Iron Soldering Profile:
Iron soldering power: Max. 20W
Pre-heating: 150/60sec.
Soldering Tip temperature: 280 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.
| Temperature () | R_Min (Kohm) | R_Cent (Kohm) | R_Max (Kohm) | Res TOL. | Temp. TOL.() |
|---|---|---|---|---|---|
| -40 | 1,649.637 | 1,726.374 | 1,806.500 | 4.64% | 0.67 |
| -39 | 1,543.253 | 1,613.954 | 1,687.726 | 4.57% | 0.66 |
| ... | ... | ... | ... | ... | ... |
| 25 | 49.500 | 50.000 | 50.500 | 1.00% | 0.23 |
| ... | ... | ... | ... | ... | ... |
| 125 | 1.631 | 1.705 | 1.781 | 4.47% | 1.77 |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer
Year Established:
2009
Employee Number:
300~500
Ecer Certification：
Verified Supplier
Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...
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