Surge Current Suppression Power NTC Thermistor 3D-9 3OHM 4A For USB Power Delivery Adapter
I Description Of The Power NTC Thermistor 3D-9 3OHM 4A
NTC or Negative Temperature Coefficient Thermistors are typically used for in-rush current limiting and
sensing applications. (As and NTC thermistor temperature increases its resistance decreses.) For in-rush
applications this attribute is used to reduce current surges to circuits thereby reducing the probability to
tripped crcuite breakers and blown fuses or damage to motors or filaments.
II Size Of The Power NTC Thermistor 3D-9 3OHM 4A(mm)
| Marking | NTC 3D-9 |
| D | less than 11mm |
| T | less than 6.0mm |
| F | 7.5+/-1.0mm |
| d | 0.75+/-0.06mm |
| L | 25mm min |
| Coating | PF Resin |
| Color | Black |
| Lead | Tin Plated Steel Wire |
| Lead Shape | Informing |
III Electrical Parameters Of The Power NTC Thermistor 3D-9 3OHM 4A
| Rated Zero-Power Resistance | 3 Ohm |
| Material Constant B25/85 | 2700 K |
| Max. Steady State Current | 4A |
| Thermal Dissipation Constant | More than 11mW/°C |
| Thermal Time Constant | Less than 35sec |
| Operating Temperature Range | -40~+170C |
IV Working Temperature Of The Power NTC Thermistor 3D-9 3OHM 4A
| NO. | R25(Ω) | (Operating Temp.℃) | NO. | R25(Ω) | (Operating Temp.(℃) | NO. | R25(Ω) | (Operating Temp.(℃) |
| 3D-9 | 3 | -40~+170℃ | 16D-9 | 16 | -40~+170℃ | 60D-9 | 60 | -40~+170℃ |
| 4D-9 | 4 | -40~+170℃ | 20D-9 | 20 | -40~+170℃ | 62D-9 | 62 | -40~+170℃ |
| 5D-9 | 5 | -40~+170℃ | 22D-9 | 22 | -40~+170℃ | 80D-9 | 80 | -40~+170℃ |
| 6D-9 | 6 | -40~+170℃ | 30D-9 | 30 | -40~+170℃ | 82D-9 | 82 | -40~+170℃ |
| 8D-9 | 8 | -40~+170℃ | 33D-9 | 33 | -40~+170℃ | 100D-9 | 100 | -40~+170℃ |
| 10D-9 | 10 | -40~+170℃ | 47D-9 | 47 | -40~+170℃ | 120D-9 | 120 | -40~+170℃ |
| 12D-9 | 12 | -40~+170℃ | 50D-9 | 50 | -40~+170℃ | 200D-9 | 200 | -40~+170℃ |
| Size | Operating Temperature Range |
| φ5mm | -40℃ ~ 155℃ |
| φ7mm/φ9mm/φ11mm | -40℃ ~ 175℃ |
| φ13mm/φ15mm/φ20mm | -40℃ ~ 200℃ |
V Series Specification Of The Power NTC Thermistor 3D-9 3OHM 4A
| Part NO. | R25
(Ω) | Max.
Steady State Current
(A) | Approx.R of Max.Cur
(Ω) | Dissi,Coef.
(mW/℃) | Thermal time Constant
(S) | Max. Load
Capacitance
in uF | Operating Temp.
(℃) |
| 120 VAC | 240 VAC |
| MF72-5D5 | 5 | 1 | 0.353 | 6 | 20 | 188 | 47 | -55 to +170 |
| MF72-10D5 | 10 | 0.7 | 0.771 | 6 | 20 | 188 | 47 |
| MF72-60D5 | 60 | 0.3 | 1.878 | 6 | 18 | 188 | 47 |
| MF72-200D5 | 200 | 0.1 | 18.70 | 6 | 18 | 88 | 22 |
| MF72-5D7 | 5 | 2 | 0.283 | 10 | 30 | 224 | 56 |
| MF72-8D7 | 8 | 1 | 0.539 | 9 | 28 | 224 | 56 |
| MF72-10D7 | 10 | 1 | 0.616 | 9 | 27 | 224 | 56 |
| MF72-12D7 | 12 | 1 | 0.816 | 9 | 27 | 224 | 56 |
| MF72-16D7 | 16 | 0.7 | 1.003 | 9 | 27 | 224 | 56 |
| MF72-22D7 | 22 | 0.6 | 1.108 | 9 | 27 | 224 | 56 |
| MF72-33D7 | 33 | 0.5 | 1.485 | 10 | 28 | 188 | 47 |
| MF72-200D7 | 200 | 0.2 | 11.65 | 11 | 28 | 188 | 47 |
| MF72-3D9 | 3 | 4 | 0.120 | 11 | 35 | 272 | 68 |
| MF72-4D9 | 4 | 3 | 0.190 | 11 | 35 | 272 | 68 |
| MF72-5D9 | 5 | 3 | 0.210 | 11 | 34 | 272 | 68 |
| MF72-6D9 | 6 | 2 | 0.315 | 11 | 34 | 272 | 68 |
| MF72-8D9 | 8 | 2 | 0.400 | 11 | 32 | 400 | 100 |
| MF72-10D9 | 10 | 2 | 0.458 | 11 | 32 | 400 | 100 |
| MF72-12D9 | 12 | 1 | 0.652 | 11 | 32 | 400 | 100 |
| MF72-16D9 | 16 | 1 | 0.802 | 11 | 31 | 400 | 100 |
| MF72-20D9 | 20 | 1 | 0.864 | 11 | 30 | 600 | 150 |
| MF72-22D9 | 22 | 1 | 0.950 | 11 | 30 | 600 | 150 |
| MF72-30D9 | 30 | 1 | 1.022 | 11 | 30 | 600 | 150 |
| MF72-33D9 | 33 | 1 | 1.124 | 11 | 30 | 600 | 150 |
| MF72-50D9 | 50 | 1 | 1.252 | 11 | 30 | 600 | 150 |
| MF72-60D9 | 60 | 0.8 | 1.502 | 11 | 30 | 600 | 150 |
| MF72-80D9 | 80 | 0.8 | 2.010 | 11 | 30 | 272 | 68 |
| MF72-120D9 | 120 | 0.8 | 3.015 | 11 | 30 | 272 | 68 |
| MF72-200D9 | 200 | 0.5 | 5.007 | 11 | 32 | 188 | 47 |
| MF72-400D9 | 400 | 0.2 | 30.30 | 11 | 32 | 188 | 47 |
| MF72-2.5D11 | 2.5 | 5 | 0.095 | 13 | 43 | 600 | 150 |
| MF72-3D11 | 3 | 5 | 0.100 | 13 | 43 | 600 | 150 |
| MF72-4D11 | 4 | 4 | 0.150 | 13 | 44 | 600 | 150 |
| MF72-5D11 | 5 | 4 | 0.156 | 13 | 45 | 600 | 150 |
| MF72-6D11 | 6 | 3 | 0.240 | 13 | 45 | 800 | 220 |
| MF72-8D11 | 8 | 3 | 0.255 | 14 | 47 | 800 | 220 |
| MF72-10D11 | 10 | 3 | 0.275 | 14 | 47 | 800 | 220 |
| MF72-12D11 | 12 | 2 | 0.462 | 14 | 48 | 800 | 220 |
| MF72-16D11 | 16 | 2 | 0.470 | 14 | 50 | 800 | 220 |
| MF72-20D11 | 20 | 2 | 0.512 | 15 | 52 | 800 | 220 |
| MF72-22D11 | 22 | 2 | 0.563 | 15 | 52 | 800 | 220 |
| MF72-30D11 | 30 | 1.5 | 0.667 | 15 | 52 | 800 | 220 |
| MF72-33D11 | 33 | 1.5 | 0.734 | 15 | 52 | 800 | 220 |
| MF72-50D11 | 50 | 1.5 | 1.021 | 15 | 52 | 800 | 220 |
| MF72-60D11 | 60 | 1.5 | 1.215 | 15 | 52 | 800 | 220 |
| MF72-80D11 | 80 | 1.2 | 1.656 | 15 | 52 | 600 | 150 |
| MF72-1.3D13 | 1.3 | 7 | 0.062 | 13 | 60 | 880 | 220 |
| MF72-1.5D13 | 1.5 | 7 | 0.073 | 13 | 60 | 880 | 220 |
| MF72-2.5D13 | 2.5 | 6 | 0.088 | 13 | 60 | 880 | 220 |
| MF72-3D13 | 3 | 6 | 0.092 | 14 | 60 | 880 | 220 |
| MF72-4D13 | 4 | 5 | 0.120 | 15 | 67 | 880 | 220 |
| MF72-5D13 | 5 | 5 | 0.125 | 15 | 68 | 880 | 220 |
| MF72-6D13 | 6 | 4 | 0.170 | 15 | 65 | 880 | 220 |
| MF72-7D13 | 7 | 4 | 0.188 | 15 | 65 | 1320 | 330 |
| MF72-8D13 | 8 | 4 | 0.194 | 15 | 60 | 1320 | 330 |
| MF72-10D13 | 10 | 4 | 0.206 | 15 | 65 | 1320 | 330 |
| MF72-12D13 | 12 | 3 | 0.316 | 16 | 65 | 1320 | 330 |
| MF72-15D13 | 15 | 3 | 0.335 | 16 | 60 | 1320 | 330 |
| MF72-16D13 | 16 | 3 | 0.338 | 16 | 60 | 1320 | 330 |
| MF72-20D13 | 20 | 3 | 0.372 | 16 | 65 | 1320 | 330 |
| MF72-30D13 | 30 | 2.5 | 0.517 | 16 | 65 | 1320 | 330 |
| MF72-47D13 | 47 | 2 | 0.810 | 17 | 65 | 880 | 220 |
| MF72-120D13 | 120 | 1.2 | 2.124 | 16 | 65 | 880 | 220 |
| MF72-1.3D15 | 1.3 | 8 | 0.048 | 18 | 68 | 1320 | 330 |
| MF72-1.5D15 | 1.5 | 8 | 0.052 | 19 | 69 | 1320 | 330 |
| MF72-3D15 | 3 | 7 | 0.075 | 18 | 76 | 1320 | 330 |
| MF72-5D15 | 5 | 6 | 0.112 | 20 | 76 | 1880 | 470 |
| MF72-6D15 | 6 | 5 | 0.155 | 20 | 80 | 1880 | 470 |
| MF72-7D15 | 7 | 5 | 0.173 | 20 | 80 | 1880 | 470 |
| MF72-8D15 | 8 | 5 | 0.178 | 20 | 80 | 1880 | 470 |
| MF72-10D15 | 10 | 5 | 0.180 | 20 | 75 | 1880 | 470 |
| MF72-12D15 | 12 | 4 | 0.250 | 20 | 75 | 1880 | 470 |
| MF72-15D15 | 15 | 4 | 0.268 | 21 | 85 | 1880 | 470 |
| MF72-16D15 | 16 | 4 | 0.276 | 21 | 70 | 1880 | 470 |
| MF72-20D15 | 20 | 4 | 0.288 | 17 | 86 | 1880 | 470 |
| MF72-30D15 | 30 | 3.5 | 0.438 | 18 | 75 | 1320 | 330 |
| MF72-47D15 | 47 | 3 | 0.680 | 21 | 86 | 1320 | 330 |
| MF72-120D15 | 120 | 1.8 | 1.652 | 22 | 87 | 1320 | 330 |
| MF72-0.7D20 | 0.7 | 11 | 0.018 | 25 | 89 | 1880 | 470 |
| MF72-1.3D20 | 1.3 | 9 | 0.037 | 24 | 88 | 1880 | 470 |
| MF72-3D20 | 3 | 8 | 0.055 | 24 | 88 | 1880 | 470 |
| MF72-5D20 | 5 | 7 | 0.087 | 23 | 87 | 2240 | 560 |
| MF72-6D20 | 6 | 6 | 0.113 | 25 | 103 | 2240 | 560 |
| MF72-8D20 | 8 | 6 | 0.142 | 25 | 105 | 2240 | 560 |
| MF72-10D20 | 10 | 6 | 0.162 | 24 | 102 | 2240 | 560 |
| MF72-12D20 | 12 | 5 | 0.195 | 24 | 100 | 2720 | 680 |
| MF72-16D20 | 16 | 5 | 0.212 | 25 | 100 | 2720 | 680 |
| MF72-0.7D25 | 0.7 | 12 | 0.014 | 30 | 120 | 2240 | 560 |
| MF72-1.5D25 | 1.5 | 10 | 0.027 | 30 | 121 | 2240 | 560 |
| MF72-3D25 | 3 | 9 | 0.044 | 32 | 124 | 2240 | 560 |
| MF72-5D25 | 5 | 8 | 0.070 | 32 | 125 | 2720 | 680 |
| MF72-8D25 | 8 | 7 | 0.114 | 33 | 125 | 2720 | 680 |
| MF72-10D25 | 10 | 7 | 0.130 | 32 | 125 | 2720 | 680 |
| MF72-12D25 | 12 | 6 | 0.156 | 32 | 126 | 3280 | 820 |
| MF72-16D25 | 16 | 6 | 0.160 | 35 | 126 | 3280 | 820 |
VI Application Of The Power NTC Thermistor 3D-9 3OHM 4A
Controlling inrush current in switching power supplies, fluorescent lamps, inverters, motors, etc.
VII Packaging Of The Power NTC Thermistor 3D-9 3OHM 4A
| Series | Quantity/poly bag |
| MF72- D5 | 1000 |
| MF72- D7 | 1000 |
| MF72- D9 | 1000 |
| MF72- D11 | 500 |
| MF72- D13 | 500 |
| MF72- D15 | 500 |
| MF72- D20 | 250 |
| MF72- D25 | 250 |
VIII OCP Overcurrent Protection
VIIII Frequently Asked Question FAQ
Q: Are you manufacturer ?
A: Yes, we are manufacturer and distributor of famous brand such as Littelfuse.
Q: Which city does your factory in ?
A: Dongguan City,Guangdong Province, China
Q: May i know your working time ?
A: Official working time is 8:00 ~ 12:00 AM, 1:30 ~ 5:30 PM.However, sales in our overseas department will do overtime working and 7x24hours online.
Q: Do you accept custom made ?
A: Yes, we are professional in customization model based on rich experiences and professional engineering.It’s helpful if you can provide drawing or detailed specification should be.
Q: May i know your lead time ?
A: Lead time is 7 days for standard model and exact lead time depend on detailed requirements if special model selected.
Q: May i receive samples before place order ?
A: Yes, generally samples is free but sample cost should be charged if quantity is too many ,product cost is too much or new mould fee required.
Q: What’s your payment terms ?
A: T/T, Paypal etc.
Q: What’s currency you can accept ?
A: Mainly US dollars and Chinese Yuan
Q: Does your package method safe for transportation ?
A: Yes, our package would be 10~1000pcs per plastic bag -> multiple bags per box -> multiple boxes per carton and it is safe for express/air/boat shipment.
Q: What’s your MOQ ?
A: In general , MOQ is 1000pcs and different for special model.
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