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NTC & PTC Thermistors

Power NTC Thermistor

The MF72 series Power NTC Thermistors provide inrush current suppression for sensitive electronics. Connecting a MF72 in series with the power source will limit the current surges typically created at turn on. Once the circuit is energized the resistance of the MF72 will decrease rapidly to a very low value, power consumption can be ignored and there will be no effect on normal operating current. Using the MF72 Power NTC Thermistor is a most cost-effective way to curb surge current and protect sensitive electronics from damage.

MF72

Applications

Can be installed into the power circuits of:
• Power supplies and inverters
• Uninterruptible Power Supplies
• Energy saving lamps
• Electronic Ballasts
• Filament Protection of various types of lamps
• Some types of heaters

Characteristics

• Small Size and fast response
• High Power handling capability
• Fast response to surge current
• High material constant (B value)
• Low residual resistance
• Wide operating temperature range -55 to +200C
• R25 allowable tolerance is ±20%
• Long-term Stability and Reliability
• UL 1434 File# E241319
• CQC File# 04001010556

Specification

Dimensions

Part No./Dim (mm)/Sym Dmax Tmax d
+/- 0.05Fig. I/II		 F1
+/-1Fig. I/II		 F2
+/-1.5Fig. II/III		 Straight Lead Wire Curved Lead Wire
L1min. L1min L2+/-2
MF72- D5 7 5 0.6/0.45 5/2.5 3 25 * 17/5 5
MF72- D7 9 5 0.6 5 3 25 17/5 5
MF72- D9 11 5.5 0.8/0.6 7.5/5 5/3 25 17/5 8
MF72- D11 13 5.5 0.8 7.5/5 5/3 25 17/5 8
MF72- D13 15.5 6 0.8 7.5 5 25 17/5 5
MF72- D15 17.5 6 0.8 10/7.5 5 25 17/5 5
MF72- D20 22.5 7 1.0 10/7.5 / 25 * / /
MF72- D25 27.5 8 1.0 10 / 25 * / /
Remark L1min., 17/5   17 indicates the long bent lead wire, 5 indicates the short bent lead wire (Fig. III)

Illustration: In general, the long bent lead wire is used, see figure II

Add suffix “L” + Fig. # to specify optional leads.

* Straight Leads Are Standard

Main Techno Parameter

Part NO. R25
(Ω)		 Max.
Steady State Current
(A)		 Approx.R of Max.Cur
(Ω)		 Dissi,Coef.
(mW/ƒC)		 Thermal time Constant
(S)		 Max. Load
Capacitance
in uF		 UL Recognized Operating Temp.
(ƒC)
120 VAC 240 VAC
MF72-005D5 5 1 0.353 6 20 188 47 -55 to +200
MF72-010D5 10 0.7 0.771 6 20 188 47
MF72-060D5 60 0.3 1.878 6 18 188 47
MF72-200D5 200 0.1 18.70 6 18 88 22
MF72-005D7 5 2 0.283 10 30 224 56
MF72-008D7 8 1 0.539 9 28 224 56
MF72-010D7 10 1 0.616 9 27 224 56
MF72-012D7 12 1 0.816 9 27 224 56
MF72-016D7 16 0.7 1.003 9 27 224 56
MF72-022D7 22 0.6 1.108 9 27 224 56
MF72-033D7 33 0.5 1.485 10 28 188 47
MF72-200D7 200 0.2 11.65 11 28 188 47
MF72-003D9 3 4 0.120 11 35 272 68 √
MF72-004D9 4 3 0.190 11 35 272 68 √
MF72-005D9 5 3 0.210 11 34 272 68 √
MF72-006D9 6 2 0.315 11 34 272 68 √
MF72-008D9 8 2 0.400 11 32 400 100 √
MF72-010D9 10 2 0.458 11 32 400 100 √
MF72-012D9 12 1 0.652 11 32 400 100 √
MF72-016D9 16 1 0.802 11 31 400 100 √
MF72-020D9 20 1 0.864 11 30 600 150 √
MF72-022D9 22 1 0.950 11 30 600 150 √
MF72-030D9 30 1 1.022 11 30 600 150 √
MF72-033D9 33 1 1.124 11 30 600 150 √
MF72-050D9 50 1 1.252 11 30 600 150 √
MF72-060D9 60 0.8 1.502 11 30 600 150 √
MF72-080D9 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 √
MF72-002.5D11 2.5 5 0.095 13 43 600 150 √
MF72-003D11 3 5 0.100 13 43 600 150 √
MF72-004D11 4 4 0.150 13 44 600 150 √
MF72-005D11 5 4 0.156 13 45 600 150 √
MF72-006D11 6 3 0.240 13 45 800 220 √
MF72-008D11 8 3 0.255 14 47 800 220 √
MF72-010D11 10 3 0.275 14 47 800 220 √
MF72-012D11 12 2 0.462 14 48 800 220 √
MF72-016D11 16 2 0.470 14 50 800 220 √
MF72-020D11 20 2 0.512 15 52 800 220 √
MF72-022D11 22 2 0.563 15 52 800 220 √
MF72-030D11 30 1.5 0.667 15 52 800 220  √
MF72-033D11 33 1.5 0.734 15 52 800 220 √
MF72-050D11 50 1.5 1.021 15 52 800 220 √
MF72-060D11 60 1.5 1.215 15 52 800 220 √
MF72-080D11 80 1.2 1.656 15 52 600 150 √
MF72-001.3D13 1.3 7 0.062 13 60 880 220 √
MF72-001.5D13 1.5 7 0.073 13 60 880 220 √
MF72-002.5D13 2.5 6 0.088 13 60 880 220 √
MF72-003D13 3 6 0.092 14 60 880 220 √
MF72-004D13 4 5 0.120 15 67 880 220 √
MF72-005D13 5 5 0.125 15 68 880 220 √
MF72-006D13 6 4 0.170 15 65 880 220 √
MF72-007D13 7 4 0.188 15 65 1320 330 √
MF72-008D13 8 4 0.194 15 60 1320 330 √
MF72-010D13 10 4 0.206 15 65 1320 330 √
MF72-012D13 12 3 0.316 16 65 1320 330 √
MF72-015D13 15 3 0.335 16 60 1320 330 √
MF72-016D13 16 3 0.338 16 60 1320 330 √
MF72-020D13 20 3 0.372 16 65 1320 330 √
MF72-030D13 30 2.5 0.517 16 65 1320 330 √
MF72-047D13 47 2 0.810 17 65 880 220 √
MF72-120D13 120 1.2 2.124 16 65 880 220 √
MF72-001.3D15 1.3 8 0.048 18 68 1320 330 √
MF72-001.5D15 1.5 8 0.052 19 69 1320 330 √
MF72-003D15 3 7 0.075 18 76 1320 330 √
MF72-005D15 5 6 0.112 20 76 1880 470 √
MF72-006D15 6 5 0.155 20 80 1880 470 √
MF72-007D15 7 5 0.173 20 80 1880 470 √
MF72-008D15 8 5 0.178 20 80 1880 470 √
MF72-010D15 10 5 0.180 20 75 1880 470 √
MF72-012D15 12 4 0.250 20 75 1880 470 √
MF72-015D15 15 4 0.268 21 85 1880 470 √
MF72-016D15 16 4 0.276 21 70 1880 470 √
MF72-020D15 20 4 0.288 17 86 1880 470 √
MF72-030D15 30 3.5 0.438 18 75 1320 330 √
MF72-047D15 47 3 0.680 21 86 1320 330 √
MF72-120D15 120 1.8 1.652 22 87 1320 330 √
MF72-000.7D20 0.7 11 0.018 25 89 1880 470 √
MF72-001.3D20 1.3 9 0.037 24 88 1880 470 √
MF72-003D20 3 8 0.055 24 88 1880 470 √
MF72-005D20 5 7 0.087 23 87 2240 560 √
MF72-006D20 6 6 0.113 25 103 2240 560 √
MF72-008D20 8 6 0.142 25 105 2240 560 √
MF72-010D20 10 6 0.162 24 102 2240 560 √
MF72-012D20 12 5 0.195 24 100 2720 680 √
MF72-016D20 16 5 0.212 25 100 2720 680 √
MF72-00.7D25 0.7 12 0.014 30 120 2240 560
MF72-001.5D25 1.5 10 0.027 30 121 2240 560
MF72-003D25 3 9 0.044 32 124 2240 560
MF72-005D25 5 8 0.070 32 125 2720 680
MF72-008D25 8 7 0.114 33 125 2720 680
MF72-010D25 10 7 0.130 32 125 2720 680
MF72-012D25 12 6 0.156 32 126 3280 820
MF72-016D25 16 6 0.160 35 126 3280 820

Note: Unless otherwise specified, the allowable tolerance of R25 is +/- 20%
Specifications may change without notice.