FSMRA4JHA04 is a miniature pushbutton switch designed for low-power control applications requiring reliable momentary contact operation. The switch features silver-plated copper alloy moving and fixed contacts with a maximum contact rating of 50 milliamps at 24V DC and a minimum contact rating of 10 microamps at 1V DC, providing excellent versatility across voltage ranges. Initial contact resistance is specified at 100 milliohms maximum, with insulation resistance of 100 megohms at 100 VDC minimum and dielectric strength rated at 500 VAC for 1 minute. The switch is constructed with a nylon 6/6 black case, steel frame with tin-over-nickel plating, and PBT or nylon 6/6 actuator button, offering a mechanical life expectancy of 100,000 cycles. Operating temperature range spans -35°C to +85°C, making it suitable for industrial control panels, consumer electronics, telecommunications equipment, and automotive applications where compact, durable switching is essential.