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[China]
Address: NO.27,Jinlanling Street,Taigongling Village Dongguan 523829,Guangdong,China
Contact name:Eric
Aolittel Technology Co.,Ltd |
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Inrush Current Suppressors 10D-11 Disc NTC Thermistor 11mm 3A 10 Ohm +/-20% 10D11 P7.5mm
Parameters of Inrush Current Limiter Thermistor MF 72 NTC Series
| P/N | R25(Ω) | R tolerance | Imax(A) | IB(A) | RS(Ω) | δ(Mw/℃) | τ(Sec) |
| 5D | |||||||
| 5D-5 | 5 | ±20% | 1 | 2 | 0.353 | 6 | 20 |
| 10D-5 | 10 | ±20% | 0.7 | 1.4 | 0.771 | 6 | 20 |
| 15D-5 | 15 | ±20% | 0.6 | 1.2 | 0.9 | 6 | 20 |
| 22D-5 | 22 | ±20% | 0.6 | 1.2 | 0.9 | 6 | 20 |
| 33D-5 | 33 | ±20% | 0.5 | 1 | 1.2 | 6 | 20 |
| 47D-5 | 47 | ±20% | 0.4 | 0.8 | 1.5 | 6 | 20 |
| 68D-5 | 58 | ±20% | 0.4 | 0.8 | 2.1 | 6 | 20 |
| 200D-5 | 200 | ±20% | 0.1 | 0.2 | 6.259 | 6 | 20 |
| 9D | |||||||
| 3D-9 | 3 | ±20% | 4 | 8 | 0.12 | 11 | 35 |
| 4D-9 | 4 | ±20% | 3 | 6 | 0.19 | 11 | 35 |
| 5D-9 | 5 | ±20% | 3 | 6 | 0.21 | 11 | 34 |
| 6D-9 | 6 | ±20% | 2 | 4 | 0.315 | 11 | 34 |
| 8D-9 | 8 | ±20% | 2 | 4 | 0.4 | 11 | 32 |
| 10D-9 | 10 | ±20% | 2 | 4 | 0.458 | 11 | 32 |
| 12D-9 | 1 | ±20% | 1 | 2 | 0.652 | 11 | 31 |
| 16D-9 | 16 | ±20% | 1 | 2 | 0.802 | 11 | 30 |
| 20D-9 | 20 | ±20% | 1 | 2 | 0.864 | 11 | 30 |
| 22D-9 | 22 | ±20% | 1 | 2 | 0.95 | 11 | 30 |
| 30D-9 | 30 | ±20% | 1 | 2 | 1.022 | 11 | 30 |
| 33D-9 | 33 | ±20% | 1 | 2 | 1.124 | 11 | 30 |
| 50D-9 | 50 | ±20% | 1 | 2 | 1.252 | 11 | 30 |
| 60D-9 | 60 | ±20% | 0.8 | 1.6 | 1.502 | 11 | 30 |
| 80D-9 | 80 | ±20% | 0.8 | 1.6 | 2.01 | 11 | 30 |
| 120D-9 | 120 | ±20% | 0.8 | 1.6 | 3.015 | 11 | 30 |
| 200D-9 | 200 | ±20% | 0.5 | 1 | 5.007 | 11 | 32 |
| 400D-9 | 400 | ±20% | 0.2 | 0.4 | 9.852 | 11 | 32 |
| 11D | |||||||
| 2.5D-11 | 2.5 | ±20% | 5 | 10 | 0.095 | 13 | 43 |
| 3D-11 | 3 | ±20% | 5 | 10 | 0.1 | 13 | 43 |
| 4D-11 | 4 | ±20% | 4 | 8 | 0.15 | 13 | 44 |
| 5D-11 | 5 | ±20% | 4 | 8 | 0.156 | 13 | 45 |
| 6D-11 | 6 | ±20% | 3 | 6 | 0.24 | 13 | 45 |
| 8D-11 | 8 | ±20% | 3 | 6 | 0.255 | 14 | 47 |
| 10D-11 | 10 | ±20% | 3 | 6 | 0.275 | 14 | 47 |
| 12D-11 | 12 | ±20% | 2 | 4 | 0.462 | 14 | 48 |
| 16D-11 | 16 | ±20% | 2 | 4 | 0.47 | 14 | 50 |
| 20D-11 | 20 | ±20% | 2 | 4 | 0.512 | 15 | 52 |
| 22D-11 | 22 | ±20% | 2 | 4 | 0.563 | 15 | 52 |
| 30D-11 | 30 | ±20% | 1.5 | 3 | 0.667 | 15 | 2 |
| 33D-11 | 33 | ±20% | 1.5 | 3 | 0.734 | 15 | 52 |
| 50D-11 | 50 | ±20% | 1.5 | 3 | 1.021 | 15 | 52 |
| 60D-11 | 60 | ±20% | 1.5 | 3 | 1.212 | 15 | 52 |
| 80D-11 | 80 | ±20% | 1.2 | 2.4 | 1.656 | 15 | 52 |
| 13D | |||||||
| 1.3D-13 | 1.3 | ±20% | 7 | 14 | 0.062 | 13 | 60 |
| 1.5D-13 | 1.5 | ±20% | 7 | 14 | 0.073 | 13 | 60 |
| 2.5D-13 | 2.5 | ±20% | 6 | 12 | 0.088 | 13 | 60 |
| 3D-13 | 3 | ±20% | 6 | 12 | 0.092 | 14 | 60 |
| 4D-13 | 4 | ±20% | 5 | 10 | 0.12 | 15 | 67 |
| 5D-13 | 5 | ±20% | 5 | 10 | 0.125 | 15 | 68 |
| 6D-13 | 6 | ±20% | 4 | 8 | 0.17 | 15 | 65 |
| 7D-13 | 7 | ±20% | 4 | 8 | 0.188 | 15 | 65 |
| 8D-13 | 8 | ±20% | 4 | 8 | 0.194 | 15 | 60 |
| 10D-13 | 10 | ±20% | 4 | 8 | 0.206 | 15 | 62 |
| 12D-13 | 12 | ±20% | 3 | 6 | 0.316 | 16 | 62 |
| 15D-13 | 15 | ±20% | 3 | 6 | 0.335 | 16 | 60 |
| 16D-13 | 16 | ±20% | 3 | 6 | 0.338 | 16 | 60 |
| 20D-13 | 20 | ±20% | 3 | 6 | 0.372 | 16 | 65 |
| 30D-13 | 30 | ±20% | 2.5 | 5 | 0.517 | 16 | 65 |
| 47D-13 | 47 | ±20% | 2 | 4 | 0.81 | 17 | 65 |
| 120D-13 | 120 | ±20% | 1.5 | 3 | 2.124 | 16 | 65 |
| 15D | |||||||
| 1.5D-15 | 1.3 | ±20% | 8 | 16 | 0.048 | 18 | 68 |
| 1.5D-15 | 1.5 | ±20% | 8 | 16 | 0.052 | 19 | 69 |
| 3D-15 | 3 | ±20% | 7 | 14 | 0.075 | 18 | 76 |
| 5D-15 | 5 | ±20% | 6 | 12 | 0.112 | 20 | 76 |
| 6D-15 | 6 | ±20% | 5 | 10 | 0.155 | 20 | 80 |
| 7D-15 | 7 | ±20% | 5 | 10 | 0.173 | 20 | 80 |
| 8D-15 | 8 | ±20% | 5 | 10 | 0.178 | 20 | 80 |
| 10D-15 | 10 | ±20% | 5 | 10 | 0.18 | 20 | 75 |
| 12D-15 | 12 | ±20% | 4 | 8 | 0.25 | 20 | 75 |
| 15D-15 | 15 | ±20% | 4 | 8 | 0.268 | 21 | 85 |
| 16D-15 | 16 | ±20% | 4 | 8 | 0.276 | 21 | 70 |
| 20D-15 | 20 | ±20% | 4 | 8 | 0.288 | 17 | 86 |
| 30D-15 | 30 | ±20% | 3.5 | 7 | 0.438 | 18 | 75 |
| 47D-15 | 47 | ±20% | 3 | 6 | 0.68 | 21 | 86 |
| 120D-15 | 120 | ±20% | 2.5 | 5 | 1.652 | 22 | 87 |
| 20D | |||||||
| 0.7D-20 | 0.7 | ±20% | 12 | 24 | 0.018 | 25 | 89 |
| 1.3D-20 | 1.3 | ±20% | 9 | 18 | 0.037 | 24 | 88 |
| 3D-20 | 3 | ±20% | 8 | 16 | 0.055 | 24 | 88 |
| 5D-20 | 5 | ±20% | 7 | 14 | 0.087 | 23 | 87 |
| 6D-20 | 6 | ±20% | 6 | 12 | 0.113 | 25 | 103 |
| 8D-20 | 8 | ±20% | 6 | 12 | 0.142 | 25 | 105 |
| 10D-20 | 10 | ±20% | 6 | 12 | 0.162 | 24 | 102 |
| 12D-20 | 12 | ±20% | 5 | 10 | 0.195 | 24 | 100 |
| 16D-20 | 16 | ±20% | 5 | 10 | 0.212 | 25 | 100 |
Introduction
Power Thermistors, also known as Inrush Current Suppressors, are a sub-category of NTC (Negative Temperature Coefficient) thermistors. Power Thermistors utilize the self heating properties of NTC thermistors which self heat with current flow, dramatically decreasing resistance.
Power thermistors utilize the characteristics of NTC thermistors where a device heats up when current flows through it, and this self heating causes a dramatic decrease in resistance. Aolittel’s power thermistors are less expensive compared to conventional power thermistors, due to lower manufacturing costs achieved
Specification for Inrush Current Limiter Thermistor MF72 NTC 10D11
| Zero Power Resistance @ 25℃ | 10Ω±20% |
| Approx. Resistance @ Max Current | 3A |
| Thermal Recovery Time Coefficient | 14 |
| Thermal Dissipation Constant | 47 |
| Operating Temperature | -55~ +200 degree |
| B value | 2800k±10% |
Application
It is used for controlling the current of motor, various heaters,
bulb voltage stabilizer, electronic energy-saving lamp, electronic
rectifier and other electronic installations.
Safe, reliable, stable, with wide range of over-current control.
Small size, large power, with strong capacity to inhibit surge
current.
Large material constant (B value), with small residual resistance.
Thermal shock resistance, with wide range of operating temperature.
Switching power supplies, adapters, LCD TVs, plasma TVs, air conditioners, DVD players, audio equipment, LCD projectors, copiers, PCs, printers, office automation equipment, gaming machine power supplies, etc.
Newly developed inrush current limiting power NTC thermistor increased max. operating current.
| Part No. | R25(ohm) | Max Stable Current(A) | Approx. Resistance Value at Maximum Current (Ω) | Max Rated Power Pmax.(W) | Dissipation Factor (mW/oC) | Thermal Time Constant (s) | Dimensions (mm) | |||||
| Dmax | Tmax | H | H 0 | d | Pin form | |||||||
| D15mm 2.5ohm/9.5A | 2.5 ohm | 9.5A | 0.044 | 3.5W | 22 min | 75 max | 17.5 | 6 | 19.5 | 26.5 | 7.5 | inner kinked |
| D15mm 5 ohm/8A | 5 ohm | 8A | 0.058 | 3.5W | 22 min | 75 max | 17.5 | 6 | 19.5 | 26.5 | 7.5 | inner kinked |
| D15mm, 10 ohm/7A | 10 ohm | 7A | 0.098 | 3.5W | 22 min | 75 max | 17.5 | 6 | 19.5 | 26.5 | 7.5 | inner kinked |
| D20mm 1 ohm/16A | 1 ohm | 16A | 0.027 | 5W | 28 min | 110 max | 22.5 | 7 | 24.7 | / | 10 | straight |
| D20mm 5 ohm/12A | 5 ohm | 12A | 0.047 | 5W | 28 min | 110 max | 22.5 | 7 | 24.7 | / | 10 | straight |
| D20mm, 10 ohm/8A | 10 ohm | 8A | 0.085 | 5W | 28 min | 110 max | 22.5 | 7 | 24.7 | / | 10 | straight |
| D25mm, 1 ohm/20A | 1 ohm | 20A | 0.021 | 7W | 30 min | 130 max | 29 | 8 | 33 | / | 10 | straight |
| D25mm, 5 ohm/14A | 5 ohm | 14A | 0.047 | 7W | 30 min | 130 max | 29 | 8 | 33 | / | 10 | straight |
| D25mm, 10 ohm/10A | 10 ohm | 10A | 0.084 | 7W | 30 min | 130 max | 29 | 8 | 33 | / | 10 | straight |
| D30mm, 1 ohm/30A | 1ohm | 30A | 0.014 | 8W | 40 min | 190 max | 36 | 8.5 | 40 | / | 18 | straight |
| D30mm, 10 ohm/13A | 10 ohm | 13A | 0.056 | 8W | 40 min | 190 max | 36 | 8.5 | 40 | / | 18 | straight |
Caution
• When force is applied to the lead wire the leg connections may break or chipping may occur.
• May get hot during use. When designing the environment around the power thermistor be especially careful with lead wire connections, materials used in the direct vicinity and the layout of other electrical components.
• Do not use two or more power thermistors in a row.
Inrush Current Limiter Surge Supression Power NTC thermistor Reliability Data
Test | Standard | Test Conditions | ΔR25/R25 (typical) | Remarks |
| Storage in dry heat | IEC 60068-2-2 | Storage at upper category temperature Temperature: 125oC Time: 1000h | <10% | No visible damage |
| Storage in damp heat, steady state | IEC 60068-2-3 | Temperature of air: 40oC Relative humidity of air: 93% Duration: 21 days | <5% | No visible damage |
| Rapid temperature cycling | IEC 60068-2-14 | Lower test temperature: -55oC Upper test temperature: 125oC Number of cycles: 10 | <10% | No visible damage |
| Endurance | I=Imax t: 1000h | <10% | No visible damage | |
| Cyclic endurance | I=Imax, 1000 cycles On-time=1 min Cooling time=6 min | <10% | ||
| Transient load | Capacitance=CT Number of cycles: 1000 | <5% | No visible damage |
Inrush Current Limiting Surge Supression Power NTC Thermistor Application Precautions
1) For inrush current limiting, the NTC thermistor must be
connected in series with the load circuit. Several inrush current
limiters can also be connected in series for higher damping. Inrush
current limiters must not be connected in parallel.
2) In general inrush current limiters require time to get back to
cold state, in which they can provide adequate inrush current
limiting due to their high resistance. The cooling down time
depends on ambient conditions.
3) It should be considered that the surrounding area of NTC
Thermistor may become quite hot. Ensure the adjacent components are
placed at sufficient distance from a thermistor to allow for proper
cooling time of the thermistor.
4) Make sure that adjacent materials are designed for operation at
temperatures comparable to the surface temperature of the
thermistor. Make sure that surrounding parts and materials can
withstand this temperature.
5) Make sure that thermistors are adequately ventilated to avoid
overheating.
6) Avoid contamination of the thermistor surface.
7) Avoid contact of NTC thermistors with any liquids and solvents.
Ensure that no water enters an NTC thermistor.
