UL1434 CQC TUV Certificated Temperature Compensation NTC Thermistor MF12 MF11
UL1434 CQC TUV Certificated MF12 MF11 Temperature Compensation NTC Thermistor For Measuring Equipments
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General
Temperature Compensation NTC Thermistor. The MF11 series of NTC Thermistors is designed for temperature measurement and the temperature compensation of measurement instruments and electronic circuits.
Characteristics
- Broad range of resistance
- Wide choice of B values
- Standard tolerances: ±5%, ±10%, ±15%,±20%
- B Value tolerance: ±10%
- Available in all standard R values
- Measuring power ≤0.5mW
- Dissipation Constant ≥4.5mW/°C
- Time Constant of ≤30 seconds
- Rated Power: 0.45W
- Long-term Stability and Reliability
- Good level of Tolerance and Interchangeability
- Temperature Range: -35°C to 125°C
Application
- Temperature Measurement
- Temperature Compensation of Electronic Circuits.
Dimension (Unit:mm)
Specification
| Part No | B Value (25/50ƒC) | Rated zero-power resistance at 25ƒC | ||
| Rated Value (K) | Allowable Tolerance (%) | Resistance range (Ω) | Allowable Tolerance (%) | |
| MF11 |
2600 4400 4500 4600 4750 |
+/-10 |
5-7 80000-144000 145000-199000 200000-299000 300000-500000 |
+/- 5 +/-15 |
Remark: We can produce thermistors according to your special requirements.
Power-Consumption Curve
Mechanical Requirements
| Item | Requirements | Test Method |
| 1.Solder-ability | The terminals shall be uniformly tinned, and its area≥95% | Dipping theNTC terminals to a depth of 15mm in a soldering bath of 245±5℃ and to the place of 6mm far from NTC body for 3±0.5s (See IEC68-2-20 /GB2423.28 Ta ) |
| 2.Resistance To Soldering Heat |
No visible mechanical damage. ΔR/RN ≤20% (ΔR =∣RN-RN'∣) |
Dipping the NTC terminals to a depth of 15mm in a soldering bath of 260±5℃ and to the place for 6mm below from NTC body for 3±0.5s.After recovering4-5h under 25±2℃. The rated zero power resistance value RN' shall be measured. (See IEC68-2-20 /GB2423.28 Tb) |
| 3.Strength of lead terminal |
No break out ΔR/RN ≤20% (ΔR =∣RN-RN'∣) |
Fasten the body and apply a force gradually to each lead until 10N and then keep for 10sec, Hold body and apply a force to each lead until 90°slowly at 5N in the direction of lead axis and then keep for 10sec, and do this in the opposite direction repeat for other terminal. After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured. (See IEC68-2-21/GB2423.29 Ua / Ub) |
Reliability Test
| Item | Requirements | Test Method |
| 1.Temp. Cycling Testing |
No visible mechanical damage. ΔRN / RN ≤20% (ΔR =∣RN-RN'∣) |
Ta:-40±3℃/ 30min→25±2℃/ 5min→ Tb:160±3℃/ 30min→25±2℃/ 5min Cycles: 5times After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured. |
| 2.Electrical Cycling Testing |
Ambient temp. Range:25℃±2℃. Cycles: 2,000times On / Off: 5 s / 55 s Test Current: 7A After recovering 4~5h under 25±2℃, the rated zero power resistance value RN' shall be measured. |
|
| 3.LoadLife ( Endurance ) Testing |
Ambient temp. Range:25℃±2℃; 7A/ 1,000±24h After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured. |
|
| 4. Humidity Testing |
No visible mechanical damage. ΔRN / RN ≤20% (ΔR =∣RN-RN'∣) |
Ambient temp. range : 40℃±2℃ R.H.:93±3% , Energized time:1000±24 h After recovering 4~5 h under 25±2℃, the rated zero power resistance value RN' shall be measured. |
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