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Specifications
Resistance @ 25℃:
50kΩ
Power(Watts):
50mW
Operating Temperature:
-55℃~+195℃
Tolerance:
±5%
B Constant (25℃/100℃):
-
Steady State Current (Max):
-
Diameter (φD):
1.8mm
Thermal Time Constant:
20s
B Constant (25℃/85℃):
-
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3950K
B Constant Tolerance:
±1%
Mfr. Part #:
MF58 503J3950
Package:
Through Hole,D1.8xL4mm
Key Attributes
Model Number:
MF58 503J3950
Product Description
Product Overview
The MF58 series is a glass-encapsulated, temperature-measuring NTC thermistor designed for precise temperature measurement and control applications. These thermistors offer reliable performance across a wide operating temperature range and are manufactured by Nanjing Shiheng Electronics Technology Co., Ltd. They are suitable for various industrial and electronic applications requiring accurate temperature sensing.
Product Attributes
- Brand: Shiheng
- Origin: China
- Product Type: Glass-encapsulated, temperature-measuring NTC thermistor
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, ROHS, CQC, Jiangsu Province High-tech Product, UL 1434 (File # E240991)
Technical Specifications
| Item | Symbol | Test Condition | Unit | Performance Requirement |
|---|---|---|---|---|
| Zero-power resistance at 25 | R25 | Ta=250.05, Test Power 0.1mW | K | 50K5% |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb), Tb=500.05 | K | 39501% |
| Dissipation Factor | In still air | mW/ | 2 | |
| Time Constant | In still air | sec | 20 | |
| Withstand Voltage | / | / | / | 1500V/AC, 1min, no breakdown or flashover |
| Insulation Resistance | / | 500V/DC, 1min | M | 500 |
| Operating Temperature Range | / | / | -55~195 | |
| Max. Rated Power | Pmax | / | mW | 50 |
| Lead Strength | / | Pulling force: 101 N, Time: 101 sec | / | No visible damage, R25 R/R2% |
| Solderability | / | Temperature 2455, Time 2-3 sec | / | Tinning area 95% |
| Resistance to Soldering Heat | / | Solder pot temperature: 2605, Immersion depth 6mm from resistor body, Time 51 sec | / | R25 R/R2% |
| Steady State Damp Heat | / | Temperature: 402, Humidity: 932%, Time: 500 hours | / | R25 R/R2% |
| Temperature Cycling | / | -55 30min 25 5min 195 30min 25 5min, repeated 5 times | / | R25 R/R2% |
| High Temperature Storage | / | Temperature: 1955, Time: 1000 hours | / | R25 R/R2% |
| Low Temperature Storage | / | Temperature: -555, Time: 1000 hours | / | R25 R/R2% |
Product Model Explanation
MF58-503J3950
- MF58: Glass-encapsulated, temperature-measuring NTC thermistor
- 503: Zero-power resistance at 25 is 50K
- J: Resistance tolerance code (J-5%)
- 3950: B25/50 value is 3950K
Usage Precautions
- Application: Temperature measurement and control.
- Avoid measurement errors caused by self-heating of the thermistor due to current flow.
- When soldering with an iron, the soldering point should be at least 2mm away from the glass shell, the soldering temperature should be below 360, and the soldering time should be less than 3 seconds.
- If the lead wire is bent, the bending point should be more than 2mm away from the glass shell to avoid damage.
- Storage Temperature: -10 ~ 40
- Storage Humidity: 75% RH
- Avoid storage in environments with corrosive gases and direct sunlight.
- Reseal and store after opening the package.
External Dimensions (Unit: mm)
| No. | Name | Material Specification | Quantity | Remarks |
|---|---|---|---|---|
| 1 | Component | NTC Thermistor | 1 | / |
| 2 | Housing | Glass | 1 | / |
| 3 | Lead Wire | Tinned steel wire 0.50.05 | 2 | / |
1810161311_Nanjing-Shiheng-Elec-MF58-503J3950_C123398.pdf
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