12.5mm Modular Panel Potentiometers, P11 Series The Vishay / Sfernice P11 Series 12.5mm Modular Panel Potentiometers are available in either Cermet (P11S) or conductive plastic elements (P11A), five shaft diameters, 20 terminal styles, shaft and panel sealed versions, and rotary and push/push switch options. The P11 series tests according to CECC 41 000 and features low current compatibility, concentric shafts, and up to twenty-one indent positions. The P11S version is ideal for industrial and aeronautic applications. The P11A version is ideal for professional audio applications.