title: COSEL Power Supply, Noise Filter 2025 Product Catalog

Summary

COSEL Power Supply, Noise Filter 2025 Product Catalog

DC-DC Converters PCB Mount TypeInstruction Manual2 Wiring to Input/OutputPin!Model nameThe following letters / numbers are entered in O.ex.)・・・MHFOO12OS, W 3R3, 05, 09, 12, 153, 62.1 Wiring Input Pin(1) External fuse!Fuse is not built-in on input side. In order to protect the unit, installthe normal-blow type fuse on input side.!When the input voltage from a front end unit is supplied to multipleunits, install the normal-blow type fuse in each unit.Table 2.1 Recommended fuse (Normal-blow type) [A]ModelModel nameMH3MH6MHFOO12O3.155.0MHFOO24O2.02.5MHFOO48O1.62.0(2) External capacitor on the input side!Adding a capacitor Ci near the input pin terminal and reduce reflected input noise from a converter.Please connect the capacitor as needed.!When you use a capacitor Ci, please use the one with high frequencyand good temperature characteristics.!If the power supply is to be turned ON/OFF directly with a switch,inductance from the input line will induce a surge voltage severaltimes that of the input voltage and it may damage the power supply.Make sure that the surge is absorbed, for example, by connectingan electrolytic capacitor between the input pins.!If an external fi lter containing L (inductance) is added to the inputline, or a wire from the input source to the DC-DC converter islong, not only the reflected input noise becomes large, but alsothe output of the converter may become unstable. In such case,connecting Ci to the input pin terminal is recommended.!If you use an aluminum electrolytic capacitor, please pay attentionto its ripple current rating.InputCiFuse+Vin-VinTable 2.2 Recommended Capacitance of an External Capacitor on the Input Side [ F]ModelModel nameMH3MH6MHFOO12O10-22010-220MHFOO24O10-10010-100MHFOO48O10-4710-47*Please adjust the capacitance in accordance with a degree of theeffect you want to achieve.(3) Reverse input voltage protection!If a reverse polarity voltage is applied to the input pin terminal, thepower supply will fail. If there is a possibility that a reverse polarityvoltage is applied, connect a protection circuit externally as describedbelow.InputFuseSchottky BarrierDiode+Vin-VinFig2.2 Reverse Input Voltage Protection2.2 Wiring Output Pin!If you want to further reduce the output ripple noise, connect anelectrolytic capacitor or a ceramic capacitor Co to the output pinterminal as shown below.+Vout+VoutCo LoadCo Load COMCo Load-Vout-Vout(a) MHFS(b) MHFWFig.2.3 Connecting Example of an External Capacitor to the Output SideTable 2.3 Recommended Capacitance of External Capacitor on the Output Side [ F]ModelOutput VoltageMH3MH63.30 - 2200 - 22050 - 2200 - 22090 - 1000 - 100120 - 1000 - 100150 - 1000 - 100±120 - 1000 - 100±150 - 1000 - 100*If you use a ceramic capacitor, keep the capacitance within therange between about 0.1 to 22uF.*Please adjust the capacitance in light of the effect you want toachieve.*If you need to use an external capacitor whose capacitance exceedsthe range provided in Table 2.3, please contact us.Fig2.1 Connecting Example of an External Capacitor to the Input SideMH-15