MSM20.15W9 - MSM Series

Series: MSM
Questions? Contact Littelfuse Support
External overview image
Roll Over to Zoom
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 MSM replaces bi-metal type timing with reliable solid-state circuitry. There are no moving parts to arc or wear. It is a cost effective solution for OEM designers. It is available for printed circuit board mounting or surface mounting with a removable bracket and wire leads. The MSM offers immediate reset on removal of power.


Operation (Delay-on-Make)
The time delay begins upon application of input voltage. 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.

Check Stock Order Samples

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) 24 V ac
Input Tolerance (%) ±10%
Input AC Line Frequency (Hz) 50/60
Output Type Solid state
Output Form NO - open during timing
Output Load Rating (VA) 0.5 A steady state @ 25°C; 0.25 A steady state @ 60°C
Output Voltage Drop (V) ≅2.5 V @ 0.5 A
Minimum Output Holding Current (mA) 40
Time Delay Type Analog
Time Delay Range 0.15 s fixed
Time Delay Tolerance (%) ±15%
Recycle Time (ms) ≤75
Repeat Accuracy (%) ±5%
Setpoint vs Ambient Temperature and Operating Voltage (%) ≤±15%
Insulation Resistance ≥100
Dielectric Breakdown ≥2000V terminals to mounting surface
Circuitry Encapsulated
Mounting Method Stranded 18 AWG wire leads (0.933 mm²) with mounting bracket; 9 in wire length
Operating Temperature -20° to 60°C (-4° to 140°F)
Storage Temperature (F/C) -30° to 85°C (-22° to 185°F)
Humidity 95% relative : non-condensing
Weight (lbs/g) 0 Kg

To request product environmental information, please complete the Product Environmental Information Request Form.