• Download the SSR6 installation guide [pdf]

• Six solid state relays on one circuit board. • 3 to 25 milliamps DC activation current per relay.   Now shipping SSR6 rev. 2 which has input current limiting on board. Use of an external resistor is optional for SSR6 rev. 2 and higher. • Ouput contacts: 0.35 amp max, 30 v AC or DC.

• Six single-pole-single-throw (SPST) normally-open (N.O.) relays on one printed circuit board for simple mounting.
• Spring cage terminal blocks for quick connections.
• Input current: 3 to 25 milliamps DC.
• Output contact: 0.35 amp max, 30 volts max ac or dc.

Like mechanical relays, solid state relays (SSRs) allow one electrical circuit to control a second electrical circuit when there is no direct electrical connection between the two circuits. These two circuits are said to be 'isolated' because there is no conductive path between them.

Also like mechanical relays, solid state relays enable a low power circuit to control a load that uses higher voltage or more current.

An advantage of solid state relays over mechanical relays is that solid state relays require much less activation current (typically 3 to 25 milliamps) than mechanical relays.

Solid state relays have no moving parts. They operate silently.

On the down side, solid state relays usually have only one contact, while mechanical relays often have multiple contacts allowing more complex control functions.