ERDM4210 - ERDM Series

Series: ERDM
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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 ERDM Series are a combination of digital electronics and a reliable electromechanical relay. These devices offer a DPDT relay output for relay logic circuits, and isolation of input to output voltages. Cost effective for OEM applications, such as random starting, sequencing ON, switch de-bouncing, anti-short cycling, and other common delay-on-make applications.


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

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Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Property (Mouseover for details) Value
Input Voltage (V) 120 V ac
Input Tolerance (%) -20% - 10%
Input AC Line Frequency (Hz) 50/60
Output Type Isolated relay contacts
Output Form DPDT
Output Load Rating (VA) 10 A resistive @ 120/240 V ac and 28 V dc; 1/3 hp @ 120/240 V ac
Time Delay Type Digital
Time Delay Range 1 - 100 m adjustable
Time Delay Tolerance (%) ±10%
Recycle Time (ms) ≤150
Adjustment Type Onboard knob
Repeat Accuracy (%) ±0.5%
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤±2%
Insulation Resistance ≥100
Polarity DC units are reverse polarity protected
Life Full load: 1 x 10⁶; Mechanical: 1 x 10⁷
Termination Type 0.25 in. (6.35 mm) male quick connect terminals
Mounting Method Surface mount with 2 #6 (M3.5 x 0.6) screws
Operating Temperature -40° to 65°C (-40° to 149°F)
Storage Temperature (F/C) -40° to 85°C (-40° to 185°F)
Dimensions 3.5 H x 2.5 W in. (88.9 x 63.5 mm)
Weight (lbs/g) 0 Kg
Dimensions 3.5 H x 2.5 W in. (88.9 x 63.5 mm)

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