HOME　 OTHER SERIES WH138 ROTATIONAL CARBON FILM POTENTIOMETERS MECHANICAL AND ELECTRICAL SPECIFICATION： Resistance Range:：500Ω-2MΩ Resistance Tolerance:：±20%(1MΩ or more ±30%) Rotational Noise：≤47mV Rotational Torque:：5-20mN.m Mechnical Endurance: above 10000 cycles WH138-1A-1 NO SWITCH WH138-1A-3 NO SWITCH WH138-1AK-1 WITH SWITCH WH138-1AK-1F WITH SWITCH WH138-1AK-3 WITH SWITCH WH138-1AK-4 WITH SWITCH WH138-2BK-4 HIGH-CURRENT,WITH SWITCH