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Specifications
Resistance @ 25℃:
50kΩ
Power(Watts):
50mW
Operating Temperature:
-55℃~250℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
-
Diameter (φD):
1.8mm
Thermal Time Constant:
20s
B Constant (25℃/85℃):
4055K
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3950K
B Constant Tolerance:
±1%
Mfr. Part #:
MF58 503F3950
Package:
Through Hole,D1.8xL4mm
Key Attributes
Model Number:
MF58 503F3950
Product Description
Product Overview
The MF58 series glass-encapsulated thermistor is a temperature-measuring NTC thermistor designed for temperature measurement and control applications. It features a durable glass housing and offers precise resistance-temperature characteristics.
Product Attributes
- Brand: Shiheng Electronics
- Origin: Nanjing, China
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, ROHS, CQC, UL 1434 (File # E240991)
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Performance Requirement |
|---|---|---|---|---|
| Zero-power resistance at 25 | R25 | Ta=250.05, Test Power 0.1mW | K | 50K1% |
| B value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb), Tb=500.05 | K | 39501% |
| Dissipation Factor | Still air | mW/ | 2 | |
| Time Constant | Still air | sec | 20 | |
| Dielectric Strength | / | 1500V/AC, 1min | / | No breakdown or arcing |
| Insulation Resistance | / | 500V/DC, 1min | M | 500 |
| Operating Temperature Range | / | / | -55~250 | |
| Maximum Rated Power | Pmax | / | mW | 50 |
| Lead Strength | / | Fix resistor end, Tension: 101 N, Time: 101 sec | / | No visible damage, R25 R/R 2% |
| 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/R 2% |
| Steady State Damp Heat | / | Temperature: 402, Humidity: 932%, Time: 500 hours | / | R25 R/R 2% |
| Rapid Temperature Change | / | -55 30min25 5min250 30min25 5min, Repeated 5 times | / | R25 R/R 2% |
| High Temperature Storage | / | Temperature: 2505, Time: 1000 hours | / | R25 R/R 2% |
| Low Temperature Storage | / | Temperature: -555, Time: 1000 hours | / | R25 R/R 2% |
Model Description
MF58-503F3950
- MF58: Glass-encapsulated temperature measuring NTC thermistor
- 503: Zero-power resistance at 25 is 50K
- F: Resistance tolerance code (F-1%, G-2%, H-3%, J-5%)
- 3950: B25/50 value is 3950K
Construction
| No. | Name | Material Specification | Quantity | Remarks |
|---|---|---|---|---|
| 1 | Element | NTC Thermistor | 1 | / |
| 2 | Housing | Glass | 1 | / |
| 3 | Lead Wire | Tinned steel wire 0.50.05 | 2 | / |
Usage Precautions
- Application: Temperature measurement and control.
- Avoid current flowing through the thermistor chip causing self-heating and measurement errors.
- When soldering, the welding point should be at least 2mm away from the glass shell. Soldering temperature should be below 360, and 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 or direct sunlight.
- Reseal packaging after opening for storage.
1810161324_Nanjing-Shiheng-Elec-MF58-503F3950_C123396.pdf
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