The CPG151101S21 is an electrical switch with through-hole mounting produced by Kailh, a major manufacturer of electronic components for a wide variety of industries. This particular switch is RoHS compliant, and is used in many different types of circuit boards and applications ranging from board testing to industrial control. Its main features include a snap-action plunger, SPST 1NO contact configuration, and a maximum voltage rating of 250V AC/DC. It is rated to 1A at 15VDC, and has an operating temperature range of -20 to +85 degrees Celsius. The switch also has an electrical life of over 100,000 cycles, making it an ideal choice for many applications.