Industrial TDR4A33 Time Delay Relay

SSAC TDR4A33 Time Delay Relay is a solid‑state ON/OFF timer with a DPDT (2 Form C) output, designed for precise load sequencing in industrial control panels. It switches 10 A resistive loads at 120/240 VAC and 30 V DC, with input‑to‑output isolation of at least 1500 Vrms and a compact 3.2 × 2.4 in (81.3 × 60.7 mm) form factor. Timing is adjustable via two 10‑position binary switches, offering ON‑time and OFF‑time ranges from 10 to 10,230 seconds in 10‑second increments, and it supports 50/60 Hz input; the module operates in recycling mode with either ON‑time‑first or OFF‑time‑first sequencing, resetting when input voltage is removed. Status indicators include a green LED for input presence and a red LED for when the output relay energizes; electrical life is rated at 100,000 cycles and mechanical life at 10,000,000 cycles. Typical applications span HVAC compressor short‑cycle protection, motor start delays, pump and conveyor timing, packaging machine sequencing, and more, including tower lighting control, beacon flashers, and parking‑lot lighting control in industrial settings.