Solid State Relays (SSR)
A solid state relay (SSR) is a digital switch for AC current. With a small DC voltage, it can switch high AC currents.
When using SSRs to switch high currents (for heating elements), they do require a heat sink. For switching a small fridge or 60W heater, the current is so low that a heat sink is usually not necessary.
Compared to mechanical relays, SSRs have a few benefits:
- They switch on an AC zero crossing, resulting in much smaller inrush currents
- They do not have a limited number of switching cycles, so they are suitable for switching often (as done with PWM).
- They are silent
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DC Voltage Solid State Relay (SSR), 10A
Excl. Tax: €8.00 Incl. Tax: €9.68 -
3-phase Solid State Relay (SSR), 20A
Excl. Tax: €32.50 Incl. Tax: €39.33 -
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Water level float switch (dry-fire protection for heating element)
Excl. Tax: €9.00 Incl. Tax: €10.89 -
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Water level float switch dual (dry-fire protection for heating element)
Excl. Tax: €10.00 Incl. Tax: €12.10