The following product line is being discontinued. A recommended replacement is shown at:

AC or DC control input solid state relays for switching AC loads

Solid state relays and solid state relay heat sinks

New, upgraded model is found at: HDA-3V25E web page

• Third generation Maximum Surge Survival™ technology for superior performance
• Internal, SCR thyristors and fourth generation DCB Direct Copper Bonding thermal optimization provide longer life than other solid state relays
• Optically isolated for 4000 volt isolation
• International green LED input status indicator and terminal numbers (L1, T1, A1, A2)
• Clear safety cover included
• 800 volt blocking voltage in the 3V models (very high voltage surge blocking)
• 1200 volt blocking voltage in the 6V models (highest voltage surge blocking)
• Ultra-Precise zero voltage turn-on to eliminate EMI noise, without the need for CE filters
• Engineered internal snubber circuit for robust performance
• Highest surge capability with the trademarked triple layer design feature to: attenuate surges AND then block surges AND then control the pass-through.
• UL recognized, CSA, CE EN 60947-4-3 (the newest and most difficult international CE specification), all models up to 75 amps.
• 76-125 amps = approvals pending. Note: the power terminals on "hockey puck" solid state relays are rated for one or two 8 AWG wires which limits the amperage. For larger wire installations, please visit the C Family of products.
• See the data bulletins for complete specifications: 1-75 amp models, 90-125 amp models, or the new C Family DC control input models or AC control input models.
• RoHS available in HDA-3V25. Other models are in RoHS transition.
• CE Safety Specification: EN60947-4-3:2000 including amendment A1
• CE Emissions Specification: EN60947-4-3:2000 Class A including amendment A1
• CE Immunity Specification: EN60947-4-3:2000 including amendment A1
• EMC Directive: 2004/108/EC
• Low Voltage Directive: 2006/95/EC

Purchase heat sinks, thermal pads, pre-installation options separately:    Parts page
Heat sink descriptions, multi-zone heat sinks, MOV options, and more.

• For a printable copy of the data bulletin including the complete, in-depth product specifications, engineering details, and thermal calculations: solid state relay data bulletin for 1-75 amp models, or heat sinks.
• For full dimensional information and label examples: Power-io solid state relay dimensions and labels
• For a zoomed in photo of the product: Solid state relay and the solid state relay cover
• It is important to anticipate three installation conditions: avoid over-amperage, over-voltage (surges), or over-temperature. See: solid-state-relay-extended-life.htm