top of page
  • Panel Mount Burst-Fire Loop (Time Proportioning Loop) Solid State Power Controller
  • Utilizes 1x Crydom HD4890 solid-state relay
  • 48-530Vac / 70A proportional output @ 40C
  • 4-20mA analog input
  • LED input-status indicator
  • Direct-bond copper (DBC) substrate for superior thermal performance
  • Epoxy free design eliminates stress on internal components due to epoxy expansion and contraction
  • Direct-power lead-frame design reduces solder joints and enhances reliability
  • Touch-safe cover
  • Agency approvals; UL, CSA, VDE/TUV, and CE
  • Available Options: Overvoltage Protection (-M). Additional options are provided in the product datasheet.

TPLP-90HDN 70 Amp / 48-530Vac Burst Fire Solid State Power Controller

  • Additional Information:

    Discount Codes:

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


    Please submit a quote request form for volume pricing ≥15 pieces.


    In Stock: Product normally ships within 24 hours. 


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


    Users Manual: TPLP Series Users Manual


    Product Datasheet: HBControls TPLP N Series Burst Fire Loop Controllers

  • Product Description:

    The HBControls TPLP-90HDN is a proportional output (burst fire) solid state power controller, utilizing a Crydom HD4890 solid state relay and a microprocessor-based control board. Fully assembled and ready-to-use, the TPLP-90HDN / HD4890 solid-state relay provides 0% to 100% power to resistive loads in proportion to the 4-20mA analog input provided. The TPLP-90HDN is rated to 70 amps at line voltages between 48Vac and 530Vac, and ideally suited to resistive heating applications where precise temperature control is desired.


    The control board of the TPLP series does not require an external power supply. 


    The output circuit of the Crydom HD4890 consists of two SCRs configured in inverse-parallel (back-to-back) capable of withstanding surge currents up-to 1,200 amps (non-repetitive). Furthermore, the SCRs are mounted to a DBC substrate (direct bond copper), which minimizes thermal excursions and enhances overall life expectancy. This enables the TPLP-90HDN to operate safely and reliably in harsh industrial applications with MTBF ratings in excess of 7 million hours.


    Operation Mode:


    Burst Fire: The output of the TPLP-90HDN / HD4890 provide a series a full AC cycles to the load, with the ratio of on/off cycles directly proportional to the 4-20mA analog input signal provided. For example, if the analog input is at 12mA, then the output will conduct load current for a few cycles and then turn off for an equivalent number of cycles, effectively applying 50% power.   


    Additional Features & Benefits of the TPLP-90HDN / Crydom HD4890 include:

    • True linear output controller with selectable soft-start, suitable for resistive or inductive loads
    • Line-voltage compensation with automatic 50/60Hz operation
    • Compact, thermally efficient heat sink to maximize overall product life expectancy
    • Direct-bond copper (DBC) substrate for superior thermal performance
    • MTBF > 7 million hours (>800 years)
    • Agency approvals; UL, CSA, VDE/TUV, and CE


    Please visit our Proportional Controllers page for versions with different control modes and load current / line voltage ratings. Our technical team is ready to help at / 800.879.7918 if you’d like to receive more information on our proportional solid state relay power controllers.

Related Products