MasTec has sold OPTO 22 SSRs since the mid 1990's - we stock in volume and sell in volume. Where OPTO 22 products cannot provide a spec match and for some specialised situations we use Power-io, Crydom and other speciality companies. OPTO 22 can switch up to 575 VAC at 45 amps in a standard hockey puck module. OPTO 22 is not so strong in DC switching and only have low current ranges. We do have other options. If you are building machines then hockey pucks are excellent as they can be mounted directly to steel cases for heatsinks or if the current is low then use the PCB mount SSRs from OPTO 22. For distributed SSRs use the OPTO 22 G1, G4 or SNAP products. For DIN Rail SSRs, large SSRs with heatsinks, single and three phase and contactors plus motor starts use Power-io. For very high current AC and DC switching we use Power-io up to 125 amp per module per phase for AC and up to 600 amps and surge of 1000 amps for DC. For DC motor control and reversing motors at up to 15KHZ, also 4-20mA proportional control Power-io. For ultra low cost high current DC switching we use SWS lower voltage 100 amp modules. In addition to these SSR products we have a range of Contact Relays and Contactors from Omega. For all those low power relay needs then there is a large range of possibilites with interfaces for RS-232, 485, USB, PCI, ethernet and wireless. see below. We even have a range of DIN Rail Smart relays that allow up to 24 relays to be controlled by PC, Embedded Micros or logic systems or the Smart relay built in timers etc

AC SSR Solid State Relays & Contact Relays	Hundreds Stocked OPTO 22 discussion
AC DIN Rail Solid State Relays (hockey puck)	Power-io , Crydom  (575 VAC 45 A, DC & AC control voltages)
AC Solid State Relays (hockey puck)	Opto 22 , Crydom  (575 VAC 45 A, DC & AC control voltages)
AC Solid State Relays (backplane mount)	Opto 22  (110VAC - 230VAC 4 A, DC Control)
AC Isolated Level Shifters	Opto 22   (3-300VAC Input > 5, 15 or 24VDC logic out)
PCB mount	Opto 22  (110VAC - 230VAC 4 A, DC Control)
Distributed I/O AC Power Control Systems	Opto 22  (110VAC - 230VAC 4 A, DC Control)
DC SSR Solid State Relays & Contact Relays	Hundreds Stocked
DC Solid State Relays (hockey puck)	Crydom  (600 VDC 45 A, DC & AC control voltages)
DC Solid State Relays (hockey puck)	SWS  (80 VDC 100A, DC control voltages)
DC Solid State Relays (backplane mount)	Opto 22 ( 0-60 VDC 4A, 0-200VDC 1A, DC Control)
DC Level Shifters	Opto 22   (3-300VDC Input > 5, 15 or 24VDC logic out)
PCB mount	Opto 22 ( 0-60 VDC 5A, 0-200VDC 1A, DC Control)
Distributed I/O DC Power Control Systems	Opto 22 ( 0-60 VDC 4A, 0-200VDC 1A, DC Control)
Contact Relays
AC & DC Contact Relays	Omega Ask :- A huge range from many manufacturers
AC & DC Contact Relays Low Power	Opto 22    (5 volt 12mA coil NC and NO models)
DIN Rail AC & DC Contact Relays	SWS   Power Relays 10 amp Resistive, 2 Amps Inductive DC 12-24 VDC and AC 90-250 VAC Logic Level control systems
Motor Control
AC Motors	Opto 22 Power-io
DC Motors with reverse using H Switches	Power-io  up to 200-600amps with 1000 amp surge
Solid State Contactors
AC high current	Power-io
AC three phase	Power-io
DIN Rail AC	Power-io
Smart Power Controllers - Relays - PNP - NPN
DIN Rail AC & DC Contact Relays 10 amp, 2 Amps Inductive or NPN Power Transistors < 80 VDC < 2 Amps or PNP Power Transistors < 80 VDC < 2 Amps	SWS   Smart Configurable Power Controllers 3.3, 5 Logic Level control systems or between 0-10VDC Input Logic thresholds levels can be preset or field adjustable 0-10VDC Other Model options : One shot Timed Outputs - Latching, LCD display and more Addtional Control Inputs: invert logic input-master release-invert master release- reset OS- reset latch
Contactors
AC Contactors	Omega Ask :- A huge range from many manufacturers
Static Switches
Solid State Switches	Soltec Ask :- we have a range of Static Switches also
IP Controlled Relays
4 or 8 Relays -- Rack or Desk top	Aviosys
RS-232/485, Ethernet or USB Controlled Relays
4 to X Relays -- Boxes and boards- SSR or Contact	Aviosys, ADlink, Measurement Computing, Sealevel
PCI Controlled Relays
4 or 8 or 16 Relays	ADlink
PLC Controlled Relays
4 or 8 Relays -- DIN Rail - Low Cost	Array
Relays - Wireless - Direct - AC Power
Handheld Systems for AC Power Control	Remote Power Control
Relays - Wireless - Direct - AC Power
Mesh Systems, Zigbee or Digi Mesh	Digi
Use the Digi Mesh DI/O module with a smart relay

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