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Specifications
Resistance @ 25℃:
22Ω
Power(Watts):
3W
Pitch:
7.5mm
Operating Temperature:
-40℃~+170℃
Tolerance:
±20%
B Constant (25℃/100℃):
-
Steady State Current (Max):
2A
Thermal Time Constant:
52s
B Constant (25℃/85℃):
-
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
3000K
B Constant Tolerance:
±10%
Mfr. Part #:
MF72 22D11
Package:
Through Hole,P=7.5mm
Key Attributes
Model Number:
MF72 22D11
Product Description
Product Overview
The MF72 Series Power Type NTC Thermistors from Nanjing Shiheng Electronics Technology Co., Ltd. are designed for surge current suppression. These components offer reliable performance with a wide operating temperature range and are manufactured under stringent quality management systems. They are suitable for applications requiring protection against inrush current.
Product Attributes
- Brand: Shiheng ()
- Product Type: Power Type NTC Thermistor
- Origin: Nanjing, China
- Encapsulation Material: Black Silicone Resin
- Lead Wire Material: Tinned Copper Wire
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, CQC Safety Certification, Jiangsu High-tech Product Certification, TUV, UL (E241319)
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 | 22 20% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 3000 10% |
| Maximum Steady Current | I max | A | 2 | |
| Maximum Allowable Capacitance | CT | 240Vac | F | 220 |
| Dissipation Factor | mW/ | 15 | ||
| Thermal Time Constant | sec | 52 | ||
| Withstand Voltage | 500V/AC, 1min | No breakdown or flashover | ||
| Insulation Resistance | 500V/DC, 1min | M | 500 | |
| Operating Temperature Range | -40 ~ 170 | |||
| Maximum Rated Power | Pmax | W | 3 | |
| Resistance-Temperature Curve | See Figure 1 | |||
| Volt-Ampere Curve | See Figure 2 | |||
| Reliability Tests | ||||
| Lead Strength | Pull Force: 0.5| | No visible damage, R/R 25% | | |
| Solderability | Temperature 2455, Time 2-3 sec | Wetted Area 95% | ||
| Resistance to Soldering Heat | Solder Pot Temp: 2605, Immersion Depth 6mm from resistor body, Time 101 sec | R/R 25% | ||
| Steady State Damp Heat | Temp: 402, Humidity: 932%, Time: 1000 hours | R/R 25% | ||
| Temperature Cycling | -40 30min 25 5min 170 30min 25 5min, 5 cycles | R/R 25% | ||
| High Temperature Storage | Temp: 1705, Time: 1000 hours | R/R 25% | ||
| Max Steady Current Endurance | Continuous application of max steady current at room temp for 100024h | R/R 25% | ||
| Max Capacitance Endurance | Apply max allowable capacitance, intermittent close 50ms, open 5 times thermal time constant per cycle, 1000 cycles | R/R 25% | ||
| Dimensions (Unit: mm) | ||||
| Model | D | L | L1 | L2 |
| MF72-22D11 | Max 13.0 | Min 17 | 8 2 | 7.5 1 |
| F1 | F2 | T | d | |
| MF72-22D11 | 4 1.5 | Max 5.5 | 0.8 0.05 | |
| Usage Precautions | ||||
| Purpose: Surge current suppression. Soldering: distance from coating 2mm, temp < 360, time < 3s. Storage Temp: -1040; Humidity: 75% RH. Avoid corrosive gases and direct light. Reseal after opening. Shelf life: 1 year. | ||||
1811142212_Nanjing-Shiheng-Elec-MF72-22D11_C122771.pdf
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