ERDM Series - Delay On Make Timer

Littelfuse Delay on Make Relays
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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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Storage Temperature (F/C)Time Delay RangeSample capableCompare
ERDM12312VDCDPDT-40° to 85°C (-40°F to 185°F)0.3s - 30s adjustableNo
ERDM12612VDCDPDT-40° to 85°C (-40°F to 185°F)0.6s - 60s adjustableNo
ERDM12812VDCDPDT-40° to 85°C (-40°F to 185°F)0.1m - 10m adjustableNo
ERDM22224VACDPDT-40° to 85°C (-40°F to 185°F)0.1s - 5s adjustableNo
ERDM4130S120VACDPDT-40° to 85°C (-40°F to 185°F)30s fixedNo
ERDM4210120VACDPDT-40° to 85°C (-40°F to 185°F)1 - 100m adjustableNo
ERDM422120VACDPDT-40° to 85°C (-40°F to 185°F)0.1s - 5s adjustableNo
ERDM423120VACDPDT-40° to 85°C (-40°F to 185°F)0.1s - 10s adjustableNo
ERDM425120VACDPDT-40° to 85°C (-40°F to 185°F)0.3s - 30s adjustableNo
ERDM427120VACDPDT-40° to 85°C (-40°F to 185°F)0.1s - 500m in 11 adjustable ranges or 0.1s - 1000m fixedNo
ERDM429120VACDPDT-40° to 85°C (-40°F to 185°F)0.2m - 15m adjustableNo