The APEM AC3559 is a robust 4x4 matrix keypad designed for various industrial applications requiring reliable key input. It incorporates a silver perimeter embossing on a black background, enhancing visual clarity and tactile feedback. The keypad boasts a 30V contact voltage rating, a 100mA contact current rating, and a travel distance of 0.80 to 0.90 mm. Its mechanical design includes a 1.20 mm polymer tactile dome and a 0.25 mm upper circuit embossing, ensuring a responsive and durable user experience. The operating temperature range of -30 to +55 degrees Celsius makes it suitable for demanding environments. Supplied with two inserts featuring black graphics on a silver background, the AC3559 offers versatility and customization options.