Littelfuse delivers vital products to address customer needs for protection, safe control, and distribution of electrical power in industrial applications. The Protection Relay and Control product portfolio includes several alternating timer series in the time-delay relay suite of products. The alternating timers are time-delay relays that alternate the operation of two loads, sharing their run time. This product group includes the following series: HRIS, dedicated delay-on-break; and KRPSA and KSPS, dedicated delay-on-make. Browse the Littelfuse alternating timer selection to find the perfect one for your needs.

Model	Image	Description
HRIS Series		The HRPS/HRIS Series combines an electromechanical relay output with microcontroller timing circuitry. It is a factory programmed module available in any 1 of 13 standard functions. It offers 12 to 240V operation in two universal ranges and factory fixed, onboard, or external adjustable time delays with a repeat accuracy of ±0.5%.
KRPS Series		The KRPS Series is a factory programmed time delay relay available with 1 of 15 functions and measures only 2 inches square. The KRPS offers a wide range of fixed, onboard, or externally adjustable time delays. The output relay contacts offer a full 10A rating with complete isolation. Its microcontroller timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and...