Littelfuse delivers vital products to address customer needs for protection and safe control of electrical power in industrial applications. The Single Function and Control Relays product portfolio includes two delay-on-make/interval series in the time-delay relay suite of products. These are dedicated, dual-function relays with microcontroller-based circuitry and excellent repeat accuracy. They offer delay-on-make and interval-delay functionality. This product group includes the ESD and KRPDA series with complete encapsulation to protect against shock, vibration, and humidity.