Power Type NTC Thermistor For Current Limiting

Quick details

• 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%
 

Description

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.

Application

• Power supplies and inverters
• Uninterruptible Power Supplies
• Energy saving lamps
• Electronic Ballasts
• Filament Protection of various types of lamps
• Some types of heaters
 

Specification

Specification

Dimensions   Part No./Dim (mm)/Sym Dmax Tmax d +/- 0.05 Fig. II/I F1 +/-1 Fig. II/I F2 +/-1.5 Fig. II/I Straight Lead Wire Curved Lead Wire A +/- .5 Lmin b L1min L2+/-2 MF72- D5 7 5 0.6/0.45 5/2.5 3 25 * 17/5 8/5 1.65 MF72- D7 9 5 0.6 5 3 25 17/5 8/5 1.9 MF72- D9 11 5.5 0.8/0.6 7.5/5 5/3 25 17/5 8/5 2.3 MF72- D11 13 5.5 0.8 7.5/5 5/3 25 17/5 8/5 2.6 MF72- D13 15.5 6 0.8 7.5 5 25 17/5 8/5 2.6 MF72- D15 17.5 6 0.8 10/7.5 5 25 17/5 8/5 2.8 MF72- D20 22.5 7 1.0 10/7.5 / 25 * / / 3.5 MF72- D25 27.5 8 1.0 10 / 25 * / / 3.5 Remark b, 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 MF72-5D5 5 1 0.353 6 20 188 47   -55 to +200 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