Bourns Multifuse Device Application Table ® ® Surface Mount Product Families Industry Application MF-PSMF MF-NSMF MF-USMF MF-MSMF MF-SMDF Radial Leaded Product Families MF-SM MF-SM/250 MF-RX/250 MF-R/600 Central office equipment x x x x MDF modules x CPE (Customer Premise Equipment) x Analog and digital line cards Telecom WAN & LAN equipment x x x x x x x x x x x x x x x x x x x x VoIP equipment x x x x PBX/KTS and key telephone systems x x x x x IEEE1284 parallel data buses x x x x x x x x x x x x x x x x x x x x PC cards x x x x x x x x x x x x x USB flash memory modules x x x x LCD monitors x x x x Smart card readers x x Mobile phones x x x Portable electronic input ports x x x x Linear AC/DC adapters x x x x x x x x x x x x x x x x x x x x Loudspeakers x Electromagnetic loads, motor x Solenoid protection x Displays x x x x Security systems x x x x Industrial controls x x x x x x x x Medical equipment Voltage / current input terminals x x x x x x Note: The application summary is for reference only. Determination of suitability for a specific application is the responsibility of the customer. * Excluding critical life support x I/O ports (HDMI, Dvi VGA) IEEE 1394 SCSI Medical Electronics* x x x IEEE 802.3 Industrial Electronics MF-RX/72 xDSL modems and splitters USB Consumer Electronics MF-RX Set top boxes CPU & hard disk drives Computer MF-R 3 Steps to Selecting the Bourns PTC for your Application 1 What is the operating voltage of your circuit? 2 What is the operating current of your circuit? 3 What is the ambient temperature of your circuit? "Bourns” and "Multifuse" are registered trademarks of Bourns, Inc. in the U.S. and other countries. COPYRIGHT© 2008, BOURNS, INC. • LITHO IN U.S.A. • 03/08 • e/MF0808 ® Ihold Model I Max. V Max. Volts Amps Itrip Resistance Max. Time to Trip Tripped Power Dissipation Amperes Seconds Watts @ 23 ˚C Ohms @ 23 ˚C @ 23 ˚C @ 23 ˚C Amperes @ 23 ˚C Hold Trip RMin. R1 Max. MF-MSMF010 MF-MSMF014 MF-MSMF020 MF-MSMF020/60 MF-MSMF030 MF-MSMF050 60.0 60.0 30.0 60.0 30.0 15.0 40 40 80 40 10 100 0.10 0.14 0.20 0.20 0.30 0.50 Ihold Model 60.0 60.0 30.0 60.0 30.0 15.0 40 40 80 40 10 100 0.10 0.14 0.20 0.20 0.30 0.50 Itrip 15.00 6.50 6.00 6.00 3.00 1.00 Resistance 0.5 1.5 6.0 1.5 8.0 8.0 1.50 0.15 0.06 0.15 0.10 0.15 Max. Time to Trip 0.8 0.8 0.8 0.8 0.8 0.8 Tripped Power Dissipation Amperes Seconds Watts @ 23 ˚C Ohms @ 23 ˚C @ 23 ˚C @ 23 ˚C Trip RMin. R1 Max. 0.30 0.34 0.40 0.40 0.60 1.00 0.70 0.40 0.40 0.40 0.30 0.15 15.00 6.50 6.00 6.00 3.00 1.00 Typ. 0.5 1.5 6.0 1.5 8.0 8.0 1.50 0.15 0.06 0.15 0.10 0.15 From the Bourns Data Sheets, select a PTC with an Ihold higher than your operating current 0.8 0.8 0.8 0.8 0.8 0.8 Ambient Operating Temperature Model MF-MSMF010 MF-MSMF014 MF-MSMF020 MF-MSMF020/60 MF-MSMF030 MF-MSMF050 0.70 0.40 0.40 0.40 0.30 0.15 V Max. I Max. Volts Amps Amperes @ 23 ˚C Hold MF-MSMF010 MF-MSMF014 MF-MSMF020 MF-MSMF020/60 MF-MSMF030 MF-MSMF050 0.30 0.34 0.40 0.40 0.60 1.00 Typ. From the Bourns Data Sheets, select a PTC with a V Max. higher than your operating voltage -40 ˚C -20 ˚C 0 ˚C 23 ˚C 40 ˚C 50 ˚C 60 ˚C 70 ˚C 80 ˚C 0.16 0.23 0.29 0.29 0.44 0.77 0.14 0.19 0.26 0.26 0.39 0.68 0.12 0.17 0.23 0.23 0.35 0.59 0.10 0.14 0.20 0.20 0.30 0.50 0.08 0.12 0.17 0.17 0.26 0.44 0.07 0.10 0.15 0.15 0.23 0.40 0.06 0.09 0.14 0.14 0.21 0.37 0.05 0.08 0.12 0.12 0.18 0.33 0.03 0.06 0.10 0.10 0.15 0.29 From the Bourns Data Sheets, ensure the PTC you selected has an Ihold higher than your operating current at your ambient temperature