The APEM Inc. part 15401 is a versatile and reliable push button switch designed for various applications. This switch features a plunger design, allowing for easy and comfortable operation. It has a normally open and normally closed contact configuration, providing flexibility in circuit design. With 4PST (Four Pole Single Throw) configuration, this switch can accommodate multiple contacts for enhanced functionality. Operating at 0.25A and compatible with both 120VAC and 120VDC, this switch can handle a wide range of voltage requirements. It has a power rating of 9VA, ensuring efficient and reliable performance. The momentary contact design allows for quick and precise switching, making it ideal for applications where short-duration activation is required. The switch is equipped with PC pins for easy and secure connection on a circuit board. The thru-hole mounting style further ensures stability and reliability in various mounting situations. Overall, the APEM Inc. part 15401 is a high-quality push button switch that offers durability, versatility, and efficient performance, making it suitable for a wide range of industrial and electronic applications.