1. OVERCURRENT PROTECTION ROADMAP P14 Committee

2. How did we get to where we are?? DEVICES –Fuses –PTC

3. How did we get to where we are?? TRADITIONAL FUSE CONSTRUCTION – Wire in Air

4. How did we get to where we are?? Axial leaded of existing product ¼ x 1-1/4 inch 5 x 20 mm Miniaturization New smaller dimension axial lead Surface Mount

5. How did we get to where we are?? TYPES OF FUSES –Elements –Thin Film –Thick Film –Multilayer

6. How did we get to where we are?? PTC –Ceramic Since the 1960’s –Polymer Since the 1980’s –Circuits can be built to cut-off current

7. Overcurrent Protection Roadmap STATUS Physical Size Range –0402 –13/32 “ Voltage Range –24 V –600 V Current Range –2 mA –60 A

8. Overcurrent Protection Roadmap ISSUES Alarm indication Arcing Venting Environmental –Lead-free and other substance bans –Higher process temperatures

9. Overcurrent Protection Roadmap TRENDS/EVOLUTION Smaller Less expensive Higher Energy Density Higher Precision –100 +/- 5% Higher Voltage Ratings Lower Voltage Ratings New Ceramics

10. 0805 Chip resistors 0603 Chip resistors: 53% less area than 0805 QSOP 16 pin Isolated: 60% less area than 0805 CSP 32 Ball/1mm pitch: 71.3% less area than 0805 IPD Roadmap Space savings