Monday, June 02, 2008

Suggested Wiring for Reed Switches

A. AC Circuits: Install a varistor or a resistor capacitor (RC) network:

This circuit will protect the switch. Use a 100 ohms 1/4 watt resistor and 0.1 microfarad non- polarized capacitor or values within that range.

B. For DC circuits, install a diode.
You can use a general purpose diode of the number 1N4004 or equivalent diode.

Additional Notes:
* Don't be mislead by the resistive ratings of the switches. Most applications involve inductive loads.
* Don't be mislead by the wattage ratings of the loads. Low wattage loads are often high inductive devices making contact protection very important.

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