Ametherm SL322R025 Cross High Power Inrush Current Limiter MF73T-1 2/25 NTC Thermistor 2Ohm 25A 3300uF 5W 35mm Dia
Ametherm SL322R025 Cross High Power Inrush Current Limiter MF73T-1 2/25 NTC Thermistor 2Ohm 25A 3300uF 5W 35mm Dia
Description
Power NTC Thermistor The MF73T-1 series Power NTC Thermistors provide inrush current suppression for sensitive electronics such as power supplies,UPS,inverters etc. Connecting a MF73T-1 in series with the power source will limit the current surges typically created at turn on.
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Application
• High power switching power supplies, Power conversion, UPS power.
• High power battery charger, electric vehicle battery charger.
• High power LED light, high power electronic energy saving lamps and other lamps.
Specification for MF73T-1 2/25
| Product Name | High Power Inrush Current Limiter NTC Thermistor | ||||||
| Part Number | MF73T-1 2/25 | ||||||
| Dimension |
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| Lead material | Tin plated copper wire | ||||||
| Coating | Silicone resin | ||||||
| Zero Power Resistance at 25C | 2Ω±20% | ||||||
| B Value 25/50 | 2600±10% | ||||||
| Maximum steady-state current | 25A | ||||||
| Max. Capacitance 240Vac | 3300uF | ||||||
| Thermal dissipation Coefficient | 45mW/℃ | ||||||
| Thermal time constant | 280 Sec | ||||||
| Withstand voltage 500V/AC 1min | No breakdown or flashover | ||||||
| Insulation resistance 500V/DC 1min | ≥500MΩ | ||||||
| Operating temperature | -40℃ ～ 200℃ | ||||||
| Maximum rated power | 5.0W |
Matters need attention
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
3Storage 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
Characteristics
• Small size, high power, reliable surge current protection.
• High material constant (B value),
• Low residual resistance
• High steady state current, long lasting, high reliability
• Convenient for PCB installation, wide operating range
MF73T-1 Series NTC Thermistor Part numbering
MF73T-1 Series NTC Thermistor Dimension (mm)
| D15 | D20 | D25 | D30 | D35 | |||
| Chip Dimensions | ø 15 | ø 20 | ø 25 | ø 30 | ø 35 | ||
| (Dmax) | 17.5 | 22.5 | 29 | 36 | 41 | ||
| Overall Diameter (mm) | |||||||
| (Tmax) | 6 | 7 | 8 | 8.5 | 10 | ||
| Thickness (mm) | |||||||
| (F ± 1.5) | 7.5 | 10 | 10 | 10 | * 18 | 18 | |
| Pitch (mm) | |||||||
| (d ± 0.05) | 0.8 | 1 | 1 | 1.2 | * 1.6 | 1.8 | * 2.0 |
| Dia of Leads (mm) | |||||||
| (L) min | 25 | 25 | 25 | 25 | 25 | ||
| Length of Leads (mm) | |||||||
| (L1) min | 17 | 17 | 17 | ||||
| Length of Leads (mm) | |||||||
| Standard Leads | (I) | (II) | (II) | (II) | (II) | ||
| Figure | Inside kink | Straight | Straight | Straight | Straight | ||
| Optional Leads | (II) | (III) | (III) | ||||
| Figure | Straight | Outside kink | Outside kink | ||||
| Weight (g). | 3.1 | 6.2 | 8.8 | 20.5 | 28.8 | ||
| Approx | |||||||
Illustration:In general, the long bent lead wire is used, see figure II * Standard
MF73T-1 Series NTC Thermistor Technical Specifications
Working Temperature: -55~200℃
| Part NO. MF73T-1 |
Res +20% (Ω) |
Max. Steady State Current lmax (A) |
Approx. R of MaxCurrent Rmax (Ω) |
| ø15mm Chip Diameter MF73T-1 Series NTC Thermistor Max Rated Power Pmax (W): 3.5 Dissipation Coefficient (mW/†C): ≥ 22 Thermal Time Constant (S): ≤ 75 |
|||
| 1.3/10 | 1.3 | 10 | 0.034 |
| 1.5/10 | 1.5 | 10 | 0.036 |
| 2.5/9.5 | 2.5 | 9.5 | 0.044 |
| 5/8 | 5 | 8 | 0.058 |
| 6/7 | 6 | 7 | 0.069 |
| 7/7 | 7 | 7 | 0.078 |
| 8/7 | 8 | 7 | 0.084 |
| 10/7 | 10 | 7 | 0.098 |
| 12/6 | 12 | 6 | 0.116 |
| 15/6 | 16 | 6 | 0.129 |
| 20/6 | 20 | 6 | 0.136 |
| 30/5 | 30 | 5 | 0.165 |
| 47/4 | 47 | 4 | 0.257 |
| 120/2.5 | 120 | 2.5 | 0.652 |
| Part NO. MF73T-1 |
Res +20% (Ω) |
Max. Steady State Current lmax (A) |
Approx. R of MaxCurrent Rmax (Ω) |
| ø20mm Chip Diameter MF73T-1 Series NTC Thermistor Max Rated Power Pmax (W): 5.0 Dissipation Coefficient (mW/†C): ≥ 28 Thermal Time Constant (S): ≤ 110 |
|||
| 0.7/16 | 0.7 | 16 | 0.026 |
| 1/16 | 1 | 16 | 0.027 |
| 1.5/15 | 1.5 | 15 | 0.030 |
| 2/14 | 2 | 14 | 0.035 |
| 2.5/13 | 2.5 | 13 | 0.038 |
| 3/12 | 3 | 12 | 0.040 |
| 4/12 | 4 | 12 | 0.043 |
| 4.7/12 | 4.7 | 12 | 0.046 |
| 5/12 | 5 | 12 | 0.047 |
| 6/11 | 6 | 11 | 0.052 |
| 6.8/10 | 6.8 | 10 | 0.055 |
| 7/9 | 7 | 9 | 0.056 |
| 10/8 | 10 | 8 | 0.085 |
| 12/7.5 | 12 | 7.5 | 0.098 |
| 15/7 | 15 | 7 | 0.112 |
| 18/7 | 18 | 7 | 0.123 |
| 20/7 | 20 | 7 | 0.132 |
| Part NO. MF73T-1 |
Res +20% (Ω) |
Max. Steady State Current lmax (A) |
Approx. R of MaxCurrent Rmax (Ω) |
| ø25mm Chip Diameter MF73T-1 Series NTC Thermistor Max Rated Power Pmax (W): 7.0 Dissipation Coefficient (mW/†C): ≥ 30 Thermal Time Constant (S): ≤ 130 |
|||
| 0.5/22 | 0.5 | 22 | 0.017 |
| 0.7/22 | 0.7 | 22 | 0.017 |
| 1/20 | 1 | 20 | 0.021 |
| 1.5/19 | 1.5 | 19 | 0.024 |
| 2/18 | 2 | 18 | 0.026 |
| 2.5/16 | 2.5 | 16 | 0.029 |
| 3/15.5 | 3 | 15.5 | 0.032 |
| 4/15 | 4 | 15 | 0.039 |
| 4.7/14 | 4.7 | 14 | 0.044 |
| 5/14 | 5 | 14 | 0.047 |
| 6.8/12 | 6.8 | 12 | 0.061 |
| 7/11 | 7 | 11 | 0.064 |
| 8/10 | 8 | 10 | 0.079 |
| 10/10 | 10 | 10 | 0.084 |
| 12/9 | 12 | 9 | 0.102 |
| 15/8 | 15 | 8 | 0.117 |
| 18/8 | 18 | 8 | 0.132 |
| 20/8 | 20 | 8 | 0.132 |
| Part NO. MF73T-1 |
Res +20% (Ω) |
Max. Steady State Current lmax (A) |
Approx. R of MaxCurrent Rmax (Ω) |
| ø30mm Chip Diameter MF73T-1 Series NTC Thermistor Max Rated Power Pmax (W): 8.0 Dissipation Coefficient (mW/†C): ≥ 40 Thermal Time Constant (S): ≤ 190 |
|||
| 0.5/30 | 0.5 | 30 | 0.013 |
| 1/30 | 1 | 30 | 0.014 |
| 1.5/25 | 1.5 | 25 | 0.016 |
| 2/23 | 2 | 23 | 0.019 |
| 2.5/20 | 2.5 | 20 | 0.023 |
| 3/19.5 | 3 | 19.5 | 0.026 |
| 4/19 | 4 | 19 | 0.031 |
| 4.7/18 | 4.7 | 18 | 0.035 |
| 5/17 | 5 | 17 | 0.037 |
| 6.8/16 | 6.8 | 16 | 0.043 |
| 7/15 | 7 | 15 | 0.044 |
| 8/14 | 8 | 14 | 0.049 |
| 10/13 | 10 | 13 | 0.056 |
| 12/12 | 12 | 12 | 0.067 |
| 15/11 | 15 | 11 | 0.078 |
| 18/10 | 18 | 10 | 0.092 |
| 29/9 | 20 | 9 | 0.113 |
| Part NO. MF73T-1 |
Res +20% (Ω) |
Max. Steady State Current lmax (A) |
Approx. R of MaxCurrent Rmax (Ω) |
| ø35mm Chip Diameter MF73T-1 Series NTC Thermistor Max Rated Power Pmax (W): 9.0 Dissipation Coefficient (mW/†C): ≥ 55 Thermal Time Constant (S): ≤ 280 |
|||
| 0.5/32 | 0.5 | 32 | 0.01 |
| 1/32 | 1 | 32 | 0.011 |
| 1.5/28 | 1.5 | 28 | 0.013 |
| 2/25 | 2 | 25 | 0.017 |
| 2.5/23 | 2.5 | 23 | 0.020 |
| 3/22 | 3 | 22 | 0.023 |
| 4/21 | 4 | 21 | 0.026 |
| 4.7/20 | 4.7 | 20 | 0.029 |
| 5/19 | 5 | 19 | 0.030 |
| 6.8/18 | 6.8 | 18 | 0.035 |
| 7/17 | 7 | 17 | 0.037 |
| 8/16 | 8 | 16 | 0.041 |
| 10/15 | 10 | 15 | 0.045 |
| 12/14 | 12 | 14 | 0.051 |
| 15/13 | 15 | 13 | 0.060 |
| 18/11 | 18 | 11 | 0.072 |
| 20/10 | 20 | 10 | 0.089 |
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