GT5Y-4SN1D24 Analog Timer, SPDT, GT5Y Series, On-Delay, 4 Ranges. The GT5Y-4SN1D24 is an ON-delay Timer with plug-in termination and 4-changeover relay. The GT5Y series timer uses the same sockets and hold-down clips as IDECs RY4S and RU series relays, 4 time ranges, power ON and timing out LED indicators and control settings by hand or screwdriver.