Solid State Relay

Model	Phases	Firing Mode	Output	Current Low	Current High	Highlights
3021B Three Phase Power Controller	Three phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controller. Accepts most commands. Sync-guard smoothes out line current draw when multiple controllers are in use.
3021A Three Phase Power Controller	Three phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controllers. Accepts most commands.
3020 Three Phase Power Controller	Three phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controller. Powered off of the 4/20mA loop, so no control transformer is required.
2022 AC Single Phase Power Controller	Single phase	Phase angle	AC	10	70	120 - 575 Vac. Analog SCR Controller. Accepts most commands. Dual setpoints for fast transitions.
1832A	Single phase	Phase angle	DC	10	30
1825 DC Power Controller	Single phase	Phase angle	DC	10	30	120 - 240 Vac. Analog SCR Controller. Accepts mA commands. 120Hz fullwave DC output.
1822 DC Power Controller	Single phase	Phase angle	DC	10	30	120 - 240 Vac. Analog SCR Controller. Accepts Vdc or potentiometer commands. 120Hz fullwave DC output.
1802 / 1805 DC Power Controller	Single phase	Phase angle	DC	10	40	120 - 570 Vac. Analog SCR Controller. Accepts Vdc or potentiometer commands. 60Hz halfwave DC output.
1600 (Multi-zone) Power Controller	Single phase	Phase angle, Zero cross	AC	10	70	120 to 575 Vac. Multi-zone SCR Controller. Accepts most commands. Allows mixing of line voltages and load currents for multiple zones in a small footprint.
1032A	Single phase	Phase angle	AC	10	70	120 - 575 Vac. SCR controller that accepts most commands. Field adjustable current limiting.
1025 Single Phase AC Analog SCR	Single phase	Phase angle	AC	10	70	120 - 480 Vac. Analog SCR Controllers. Accepts mA commands.
1022 AC Single Phase Analog SCR	Single phase	Phase angle	AC	10	70	120 - 480 Vac. Analog SCR Controllers. Accepts Vdc and potentiometer commands.
1021B AC Single Phase Analog SCR	Single phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controller. Sync-guard™ smoothes out line current draw when multiple controllers are in use.
1021A Single Phase Zero-Cross Power Controller	Single phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controller. Accepts most commands.
1020 AC Zero-Cross Single Phase Power Controller	Single phase	Zero cross	AC	10	70	120 - 575 Vac. Analog SCR Controller. Powered off of the 4/20mA loop, so no control transformer is required.