top of page
  • Crydom panel mount solid-state relay
  • 3-32Vdc input
  • Normally-closed 24-280Vac / 90A output
  • Back-to-back (inverse parallel) SCR output maximizes long-term reliability 
  • Direct-bond copper (DBC) substrate for superior thermal performance
  • Direct-power lead-frame design reduces solder joints and enhances reliability
  • Mean time before failure (MTBF) >7 million hours when operating in a 60°C ambient temperature
  • EMC compliant, level 3
  • Agency approvals; cURus (UL) Recognized, CSA, VDE/TUV, CE

Crydom D2490-B 90 Amp / 24-280Vac, DC Input, Normally Closed Solid State Relay

  • Additional Information:

    Discount Codes:

    HBC500 - Enter promo code on checkout to receive a 5% discount on orders ≥$500.

    HBC1K -  Enter promo code on checkout to receive a 10% discount on orders ≥$1,000. 


    Please submit a quote request form for volume pricing ≥75 pieces.


    Shipping: All website orders >$100 are eligible for free ground shipping within the United States


    In Stock: Product normally ships within 24 hours. 

    Condition: New / Unused


    Product Datasheet: Crydom Series1 Solid-State Relays


    Warranty: Additional information is available on the Policies page of our website 

  • Product Description:

    The normally-closed Crydom D2490-B is part of the Series 1 range of solid state relays; Crydom’s “signature” product family and the most popular solid state relays in the market. The D2490-B is capable of switching 90 amp loads at line voltages between 24Vac and 280Vac. Designed for endurance and reliability in harsh industrial applications, the D2490-B utilizes rugged back-to-back (inverse parallel) SCRs to switch power to AC loads. This significantly reduces the total power dissipation of the D2490-B in comparison to similar triac output solid state relays, in addition to enhancing the relay’s ability to withstand heavy surge currents. The typical MTBF (mean time before failure) of a Crydom D2490-B is >7 million hours. 


    The D2490-B is a DC input solid state relay and can accept control signals between 3Vdc and 32Vdc. It incorporates an active current-limiting circuit, which enables it to switch 90 amp loads with only 12mA of input current. This makes them highly compatible in applications utilizing low-power PLCs or control boards.


    Additional features and benefits of the Crydom D2490-B solid state relay include:

    • Direct bond copper (DBC) substrate for superior thermal performance
    • Epoxy-free design to eliminate stress caused by the expansion and contraction of epoxy during normal operation
    • Direct power lead frame design to minimize solder joints in the load-current path
    • SEMS screws and washers for improved pull-out ratings
    • Redesigned solid state relay housing with anti-rotation barriers
    • Shock & vibration resistant to IEC 600068-2-6 & IEC 600068-2-27
    • Agency approvals; cURus, CSA, VDE and CE compliant
    • EMC compliant (level 3)


    A heat sink and thermal compound are normally required to prevent a solid state relay from overheating during normal operation. The D2490-B is used in a wide range of HBControls power controllers, which are solid state relays pre-assembled onto custom designed, thermally efficient heat sinks. Solid state relay power controllers offer enhanced reliability, performance and are fully derated to their maximum load current rating in a 40°C ambient environment.


    Please contact us at / 800.879.7918 if you’d like to receive more information on Crydom’s Series 1 solid state relays or discuss specific application requirements.

Related Products