Littelfuse, Inc. Time Delay Relays KRDB112.5S

The KRDB112.5S is a compact delay-on-break time delay relay with a 2 in. (50.8 mm) square footprint and 30.7 mm depth, designed for OEM applications requiring isolation and reliability. It operates on 12VDC with a fixed 2.5-second time delay. The relay features isolated SPDT contacts rated for 10A resistive at 125VAC, 5A resistive at 230VAC and 28VDC, and 1/4 hp at 125VAC. Timing is controlled by a microcontroller with ±0.5% repeatability or ±20ms, whichever is greater, and factory calibration tolerance of ±5%. The unit is encapsulated for protection against shock, vibration, and humidity, and includes 0.25 in. (6.35 mm) male quick-connect terminals. Input voltage tolerance is -15% to +20%, power consumption is ≤2W DC, and isolation voltage is ≥1500V RMS. Operating temperature ranges from -40°C to 60°C. Mechanical life is 1×10⁷ operations; electrical life is 1×10⁵ operations.