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Specifications
Resistance @ 25℃:
100kΩ
Power(Watts):
35mW
Operating Temperature:
-40℃~250℃
Tolerance:
±1%
B Constant (25℃/100℃):
-
Steady State Current (Max):
-
Thermal Time Constant:
14s
B Constant (25℃/85℃):
-
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3950K
B Constant Tolerance:
±1%
Mfr. Part #:
MF51B 104F3950
Key Attributes
Model Number:
MF51B 104F3950
Product Description
Product Overview
The MF51 Series is a glass-sealed NTC thermistor designed for temperature measurement and control applications. Manufactured by Nanjing Shiheng Electronics Co., Ltd., these thermistors offer precise resistance values and B-values, making them suitable for a wide operating temperature range of -40 to 250. They are RoHS compliant and available with various resistance tolerances and B-value accuracies.
Product Attributes
- Brand: Nanjing Shiheng Electronics Co., Ltd.
- Series: MF51
- Type: Glass Shell NTC Thermistor
- Origin: China
- Certifications: ISO9001:2015, IATF16949:2016, ISO14001:2015, RoHS 2.0, CQC (CQC19001222003), TUV (R50245892), High-tech product certificate in Jiangsu Province
- Environmental Compliance: RoHS
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Requirements |
|---|---|---|---|---|
| 25 Zero Power Resistance | R25 | Ta=250.01, Test Power0.1mW | K | 100K1% |
| B Value (B25/50) | B | Ta=250.01, Tb=500.01 | K | 39501% |
| Thermal Dissipation Coefficient | In still air | mW/ | Approx. 0.9 | |
| Thermal Time Constant | In still air | sec | Approx. 9 | |
| Withstand Voltage | / | 500V/AC, 1min | / | No breakthrough and flash over |
| Insulation Resistance | / | 50V/DC, 1min | M | 10 |
| Operating Temperature Range | / | / | -40250 | |
| Maximum Rated Power | Pmax | / | mW | 35 |
| Resistance & Temperature Table | R&T-table | / | / | See attached table I |
| Resistance Tolerance & B-value Tolerance | / | / | / | See attached table II |
Product Dimensions (Model: MF51-B)
| Model | D (mm) | H (mm) | L (mm) | d (mm) |
|---|---|---|---|---|
| MF51-B | 1.70.25 | 3.20.5 | 655 | 0.250.02 |
Technical Requirements (for MF51-104F3950(B))
- Zero Power Resistance: R25: 100K1%
- B25/50 Value: 3950K1%
- Leads: 0.25 Magnesite wire
- Encapsulation: Glass shell package
- Compliance: Meets environmental protection requirements: RoHS
Installation & Use Precautions
- Application: Temperature measurement and control.
- Avoid excessive current that may cause self-heating and measurement errors.
- When soldering, maintain at least 2mm distance from the glass seal head. Soldering temperature should be below 360, and time less than 3 seconds.
- If leads are bent, the bending point should be more than 2mm from the glass shell to prevent damage.
- Storage Temperature: -1040.
- Storage Humidity: 75% RH.
- Avoid storage in environments with corrosive gases or direct illumination.
- After opening packaging, reseal for storage. Storage period is 1 year. Products exceeding the storage period can be re-tested against standard requirements and used if compliant.
- When using heat-shrink tubes, avoid using a hair dryer. Recommended method: place the product with the heat-shrink tube into a constant-temperature oven and heat shrink at 110 for 10-12 minutes.
2509021755_Nanjing-Shiheng-Elec-MF51B-104F3950_C394031.pdf
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