SL22 B57238S Silicone Disc NTC Thermistor 22R 5A 15mm For Inrush Current Limiting
Description Of The Disc NTC Thermistor
Inrush current is the momentary surge of current created when power is turned on to motors,transformers,power suppliers and heating elements. The more power required by industrial equipment,the larger the inrush current. It can effectively quench the inrush current by means of in series with power NTC thermistor in return circuit of power supply. The thermistor’s resistance decreases dramatically following the inrush,allowing the steady state curent to flow with very little resistance.This effect provides inrush current protection, yet allows efficiency during normal operation.The power NTC Thermistor produced by Dongguan Ampfort Electronics Co.,Ltd. with large scale,especially MF73T,MF73,MF74,MF75 serial products with big size,which can be applied in such inrush protection with industrial level as industrial robots and automation.
Characteristics Of The Disc NTC Thermistor
- Small size,strong power and strong capability of surge current protection
- Big material constant(B value),small remain resistance,low power consumption.
- Large steady state current,long life,high reliability
- Easy PCB installation,completed series,wide application range.
Recommended Application Of The Disc NTC Thermistor
- High power switch power,Power conversion,UPS power
- High power battery charger,electric vehicle battery charger
- High power LED light,high power electronic energy saving lamps and other lighting lamps
Dimensions Of The Disc NTC Thermistor (mm)
| D | L1 | L2 | F | T | d | Coating material | Wire material |
| Max 17.5 | Min 17 | 5±2 | 7.5±1 | Max 6.0 | 0.8±0.05 | Black silicone | Tin plated copper wire |
Body diameter Φ15mm Of The Disc NTC Thermistor
| P/N | R25±20%(Ω) | Thermal sensitive index B±10%(K) | Max steady state current Imax(A) | Approx R of Max current Rmax(Ω) | Max power dissipation Pmax(W) | Max impulse capacitance (uF)240VAC |
| MF73T-1 0.7/11 | 0.7 | 2600 | 11 | 0.024 | 5.0 | 1000 |
| MF73T-1 1/10.5 | 1 | 2600 | 10.5 | 0.030 | 1000 |
| MF73T-1 1.3/10 | 1.3 | 2600 | 10 | 0.034 | 820 |
| MF73T-1 1.5/10 | 1.5 | 2600 | 10 | 0.036 | 820 |
| MF73T-1 2/9.5 | 2 | 2600 | 9.5 | 0.040 | 820 |
| MF73T-1 2.5/9.5 | 2.5 | 2600 | 9.5 | 0.044 | 820 |
| MF73T-1 3/9 | 3 | 2800 | 9 | 0.046 | 820 |
| MF73T-1 5/8 | 5 | 3000 | 8 | 0.058 | 820 |
| MF73T-1 6/7 | 6 | 3000 | 7 | 0.069 | 680 |
| MF73T-1 7/7 | 7 | 3000 | 7 | 0.078 | 680 |
| MF73T-1 8/7 | 8 | 3000 | 7 | 0.084 | 680 |
| MF73T-1 10/7 | 10 | 3200 | 7 | 0.098 | 680 |
| MF73T-1 12/6 | 12 | 3200 | 6 | 0.116 | 680 |
| MF73T-1 15/6 | 15 | 3200 | 6 | 0.125 | 680 |
| MF73T-1 16/6 | 16 | 3200 | 6 | 0.129 | 680 |
| MF73T-1 20/6 | 20 | 3200 | 6 | 0.136 | 680 |
| MF73T-1 22/5 | 22 | 3200 | 5 | | 680 |
| MF73T-1 30/5 | 30 | 3200 | 5 | 0.165 | 680 |
| MF73T-1 47/4 | 47 | 3200 | 4 | 0.257 | 680 |
| MF73T-1 55/4 | 55 | 3200 | 4 | 0.287 | 680 |
| MF73T-1 120/2.5 | 120 | 3400 | 2.5 | 0.652 | 680 |
Reliability Of The Disc NTC Thermistor
| Item | Test conditions and methods | Technical requirements |
| Terminal strength | Pull: wire diameter(mm) pulling force (N) 0.5<d≤0.8 10,0.8<d≤1.25 20 time:10±1 sec | No obvious damage, R25 ΔR/R≤±25% |
| Solderability | temperature : 245±5℃ for 2-3sec | the coverage area should be more than 95%. |
| Welding heat resistant | Tin pan temperature : 260±5℃ , immersion depth is apart from the body resistance 6mm,time:10±1sec | R25 ΔR/R≤±25% |
| Steady humidity and heat | Temp:40℃±2℃ humidity:93±2% Time :1000hrs | R25 ΔR/R≤±25% |
| Rapid changes in temperature | -40℃30min→25℃5min→170℃30min →25℃5min, 5cycles | R25 ΔR/R≤±25% |
| High temperature storage | Temp : 170℃±5℃, Time :1000hrs | R25 ΔR/R≤±25% |
| The largest steady current durability | Continue to exert maximum static electricity thermistor at room temperature to 1000 + 24 h | R25 ΔR/R≤±25% |
| Maximum capacitance | Exert Max allowable electric capacity, 5 times intermittently make 50 ms, break the thermal time constant of a loop, toward a thermistor 1000 - cycle. | R25 ΔR/R≤±25% |
Matters need attention Of The Disc NTC Thermistor
1 This product USES: Inhibition of surge current;
2 When the soldering iron welding, the welding place at least 2 mm space from coating layer and the welding temperature should be lower than 360 ℃, welding time < 3 ses
3 Storage temp:-10℃ ～ 40℃；storage humidity :≤75% RH；
4 Avoid air corrosion or sunlight
5 Remake sealed storage after package opening.
6 Shelf life: 1 year
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SL22 B57238S Silicone Disc NTC Thermistor 22R 5A 15mm For Inrush Current Limiting Images
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