The 100SP4T8B13VS2REH is a three-position rotary switch featuring a single-pole double-throw (SPDT) circuit configuration with momentary ON functionality at positions 1 and 3, and a center OFF position. The switch is rated for 0.4 volt-amps maximum at 20V (AC or DC) with gold-plated contacts for reliable electrical performance. It operates over a temperature range of -40°C to 85°C and provides an insulation resistance of 1,000 megaohm minimum with 1,000 V RMS dielectric strength at sea level. The switch features a 15/32-32 UNS-2A threaded shaft for secure panel mounting and includes an epoxy seal for environmental protection. With an electric life rating of 6,000 make-and-break cycles at full load, this switch is suitable for control applications in industrial equipment, consumer electronics, and instrumentation where reliable switching and compact panel integration are required.