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Specifications
Resistance @ 25℃:
22Ω
Power(Watts):
2W
Pitch:
7.5mm
Operating Temperature:
-40℃~+170℃
Tolerance:
±20%
B Constant (25℃/100℃):
-
Steady State Current (Max):
1A
Thermal Time Constant:
30s
B Constant (25℃/85℃):
-
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3000K
B Constant Tolerance:
±10%
Mfr. Part #:
MF72 22D9
Package:
Through Hole,P=7.5mm
Key Attributes
Model Number:
MF72 22D9
Product Description
Product Overview
The MF72 Power Type NTC Thermistor, manufactured by Nanjing Shiheng Electronics Technology Co., Ltd., is designed for surge current suppression. It features a zero-power resistance of 22 at 25 with a B value of 3000K. This component operates within a temperature range of -40 to 170 and supports a maximum allowable capacitance of 240Vac/150F. It is constructed with a black epoxy resin encapsulation and tin-plated copper leads.
Product Attributes
- Brand: Shiheng
- Product Series: MF72 Power Type NTC Thermistor
- Encapsulation Material: Black Epoxy Resin
- Lead Material: Tin-plated Copper Wire
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, CQC, UL (E241319), Jiangsu High-tech Product, TUV (R50245892)
- Origin: Nanjing, China
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Performance Requirement |
|---|---|---|---|---|
| Zero-power resistance at 25 | R25 | Ta=250.5, Test Power 0.1mW, Tested in air | 2220% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 300010% |
| Maximum Steady Current | I max | - | A | 1 |
| Maximum Allowable Capacitance | CT | 240Vac | F | 150 |
| Dissipation Factor | - | mW/ | 11 | |
| Thermal Time Constant | - | sec | 30 | |
| Withstand Voltage | - | 500V/AC, 1min | - | No breakdown or arcing |
| Insulation Resistance | - | 500V/DC, 1min | M | 500 |
| Operating Temperature Range | - | - | -40 ~ 170 | |
| Maximum Rated Power | Pmax | - | W | 2 |
| Lead Strength | - | Tension: 10s, 10N (0.5| - | No visible damage, R/R25% | |
| Solderability | - | 2455, 2-3s | - | 95% tinning area |
| Resistance to Soldering Heat | - | 2605, 6mm from body, 101s | - | R/R25% |
| Steady State Damp Heat | - | 402, 93%2% RH, 1000 hours | - | R/R25% |
| Rapid Temperature Change | - | 5 cycles (-40 30min25 5min170 30min25 5min) | - | R/R25% |
| High Temperature Storage | - | 1705, 1000 hours | - | R/R25% |
| Maximum Steady Current Endurance | - | Continuous application of max steady current at room temp, 100024h | - | R/R25% |
| Maximum Capacitance Endurance | - | 1000 cycles (50ms on, 5x thermal time constant off) | - | R/R25% |
| Model: MF72-22D9 | Body Diameter (D9) | Max: 11.0 mm | mm | - |
| Length (L1) | Min: 17 mm | mm | - | |
| Lead Spacing (F1) | 7.51 mm | mm | - | |
| Lead Length (L2) | 82 mm | mm | - | |
| Lead Diameter (d) | 0.80.05 mm | mm | - | |
| Max Width (T) | Max: 5.5 mm | mm | - |
Usage Precautions
- Primary Use: Surge current suppression.
- Soldering: Keep soldering point at least 2mm from the coating layer. Soldering temperature < 360, time < 3 seconds.
- Storage Temperature: -10 to 40.
- Storage Humidity: 75% RH.
- Storage Environment: Avoid corrosive gases and direct sunlight.
- Packaging: Reseal after opening.
- Shelf Life: 1 year.
1810161311_Nanjing-Shiheng-Elec-MF72-22D9_C122769.pdf
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