Name: KRDI Series - Interval Timer
Brand: Littelfuse Inc.

KRDI Series - Interval Timer

Series: KRDI

Questions? Contact Littelfuse Support

Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The KRDI Series is a compact time-delay relay measuring only 2 in. (50.8 mm) square. Its solid-state timing circuit provides excellent repeat accuracy and stability. Encapsulation protects against shock, vibration, and humidity. The KRDI Series is a cost effective approach for OEM applications that require small size, isolation, reliability, and long life.

Operation (Interval)
Upon application of input voltage, the time delay begins. The output relay energizes during the time delay. At the end of the time delay, the output de-energizes and remains de-energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and the output.

Access specifications, certifications, check availability and order parts below

Catalog #	Input Voltage (V)	Output Form	Storage Temperature (F/C)	Time Delay Range	Dimensions	Stock	Samples

KRDI120	12 V dc	SPDT	-40° to 85°C (-40° to 185°F)	0.1 - 10 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI121	12 V dc	SPDT	-40° to 85°C (-40° to 185°F)	1 - 100 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI122	12 V dc	SPDT	-40° to 85°C (-40° to 185°F)	10 - 1000 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI2110S	24 V ac/dc	SPDT	-40° to 85°C (-40° to 185°F)	10 s fixed	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI2160S	24 V ac/dc	SPDT	-40° to 85°C (-40° to 185°F)	60 s fixed	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI220	24 V ac/dc	SPDT	-40° to 85°C (-40° to 185°F)	0.1 - 10 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI320	24 V dc	SPDT	-40° to 85°C (-40° to 185°F)	0.1 - 10 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI420	120 V ac	SPDT	-40° to 85°C (-40° to 185°F)	0.1 - 10 s onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order
KRDI424	120 V ac	SPDT	-40° to 85°C (-40° to 185°F)	1 - 100 m onboard adjustable	2 H x 2 W in. (50.8 x 50.8 mm)	Check	Order