Changsha Purple Horn E-Commerce Co., Ltd.
| Resistance @ 25℃ | 3Ω |
| Power(Watts) | 2W |
| Operating Temperature | -40℃~+170℃ |
| Pitch | 7.5mm |
| Tolerance | ±20% |
| Steady State Current (Max) | 4A |
| Thermal Time Constant | 35s |
| B Constant (25℃/50℃) | 2600K |
| B Constant Tolerance | ±10% |
| Description | NTC Thermistor 3Ω Through Hole,P=7.5mm |
| Mfr. Part # | MF72 3D9-3.5 |
| Package | Through Hole,P=7.5mm |
| Model Number | MF72 3D9-3.5 |
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Product Specification
| Resistance @ 25℃ | 3Ω | Power(Watts) | 2W |
| Operating Temperature | -40℃~+170℃ | Pitch | 7.5mm |
| Tolerance | ±20% | Steady State Current (Max) | 4A |
| Thermal Time Constant | 35s | B Constant (25℃/50℃) | 2600K |
| B Constant Tolerance | ±10% | Description | NTC Thermistor 3Ω Through Hole,P=7.5mm |
| Mfr. Part # | MF72 3D9-3.5 | Package | Through Hole,P=7.5mm |
| Model Number | MF72 3D9-3.5 |
The MF72 Power NTC Thermistor series from Nanjing Shiheng Electronics Co., Ltd. is designed for current limiting applications. These thermistors utilize a silicone resin encapsulation, offering high-temperature resistance (up to 300C), fast heat dissipation, and good insulation. The material is chosen for its effectiveness in power NTC thermistors and provides a robust yet thermally efficient solution. While the silicone surface may exhibit minor friction marks from handling, and the encapsulation at the leads can show minor cracks or chips under improper external force, these cosmetic aspects do not affect the product's performance or reliability.
| Item | Symbol | Test Conditions | Unit | Performance Requirements |
|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5 (Test Power 0.1mW, in air) | 3 20% | |
| B-value (B25/50) | B | Ta=250.01, Tb=500.01 | K | 2600 10% |
| Max steady current | I max | - | A | 4 |
| Max allowable capacity value | CT | 240Vac | F | 220 |
| Thermal dissipation Coefficient | In still air | mW/ | 11 | |
| Thermal time constant | In still air | sec | 35 | |
| Withstand voltage | - | 500V/AC, 1min | - | No breakthrough and flash over |
| Insulation resistance | - | 500V/DC, 1min | M | 500 |
| Operating temperature range | - | - | -40 ~ 170 | |
| Maximum rated power | Pmax | - | W | 2 |
| Product Model | MF72 3D9 | - | - | - |
| Dimensions (D) | - | - | mm | 10 |
| Dimensions (L1) | - | - | mm | 3.5 0.5 |
| Dimensions (L2) | - | - | mm | 5 2 |
| Dimensions (F) | - | - | mm | 7.5 0.5 |
| Dimensions (T) | - | - | mm | 5.5 Max |
| Dimensions (d) | - | - | mm | 0.8 0.05 |
| Item | Test Standard | Test Conditions and Methods | Performance Requirements |
|---|---|---|---|
| Terminal strength | IEC60068-2-21 | Lead diameter(mm): 0.5<d0.8, Pull strength(N): 10; Time: 101 sec | No obvious damage; |R25/25R|25% |
| Solderability | IEC60068-2-20 | Temperature 2455, time 2-3 sec | Tinning coverage area 95% |
| Withstand soldering temp | IEC60068-2-20 | Tin pot temperature: 2605, insert depth from body 6mm, time 10 1 seconds | |R25/25R|25% |
| Steady humidity and heat | IEC60068-2-78 | Temperature: 402, humidity: 932%, Time: 1000 hours | |R25/25R|25% |
| Rapid changes in temperature | IEC60068-2-14 | -40 30min25 5min170 30min25 5min, 5 cycles | |R25/25R|25% |
| High temperature storage | IEC60068-2-2 | Temperature: 1705, Time: 1000 hours | |R25/25R|25% |
| Durability for max steady current | IEC60539-1 | Sustained max steady current at ambient temperature, 100024h | |R25/25R|25% |
| Max capacity value durability | IEC60539-1 | 1000 cycles (intermittent switch 50ms, cut 5 times thermal time constant as one cycle) | |R25/25R|25% |
| Packing Type | Packing Specification | Packing Material, Size | Quantity |
|---|---|---|---|
| Bulk Type | Packing bag | Self sealing bag | 1 |
| Reel Type | Reel packing box | Packing box WGH335mm240mm50mm | - |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer
Year Established:
2009
Employee Number:
300~500
Ecer Certification：
Verified Supplier
Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa... Changsha Purple Horn E-Commerce Co., Ltd.. is a professional company focus on integrated circuit ic business. Purple Horn will also responsible with exporting and logistic business. there is professional factory Beijing Silk Road which focus on desigining and manufacture. Founded in 2009, Our compa...
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