D105J12B205NQA is a miniature snap-in power rocker switch from C&K Components designed for momentary-off-momentary switching applications. This switch features a single pole, double throw (SPDT) configuration with silver contact material and extended PC thru-hole termination, providing reliable electrical connections for PC board mounting. The switch is rated for 4 amps at 125 VAC (50/60 Hz) with a T85 temperature rating and supports 10,000 make-and-break cycles at full load, with an insulation resistance of 10? O minimum and dielectric strength of 1,000 Vrms minimum. The rocker actuator is available in black housing (standard) with no marking option, and the switch meets RoHS compliance and UL 61058-1 standards. This switch is ideal for small appliances, computers and peripherals, and medical instrumentation where compact, reliable switching is required.