UNSPSC 32121707: Silicon controlled rectifier

A four-layer solid state device that controls current.

UNSPSC 32121707 Silicon controlled rectifier is a Commodity code that encompasses protective relays, control panels, motor control centers, and associated electrical components for utility, municipal water and wastewater, and transit infrastructure. State and local governments procure these items primarily for replacement of aging equipment in electrical distribution systems, SCADA control integration, and pump station automation. Solicitations under this code come from utility authorities, county governments, school districts, and transit agencies, with a notable concentration among Florida water and wastewater operators and Texas municipal entities. Kissimmee Utility Authority, Hillsborough County Board of County Commissioners, and Bay County Board of County Commissioners appear as repeat buyers of control panels and protective relays for electrical system modernization. The work being solicited ranges from sole-source procurement of standardized relay platforms (such as Schweitzer Engineering Laboratories SEL 451 and 751 series equipment) to competitive bidding for control panel fabrication, motor control center installation, and ballasts and capacitors for parks and facilities maintenance.

Recent activity concentrates in Florida and Texas, with secondary presence in Georgia. Representative opportunities include Kissimmee Utility Authority issuing a quotation request (SS26054SH) for SEL protection relays due August 24, 2026, designated as sole-source procurement; Hillsborough County issuing competitive sealed bids (ITB-26-00393) for pump station control panels and enclosures with an estimated contract value of $3.66 million over two years, bids due September 29, 2026; Hillsborough County issuing competitive sealed bids (ITB-26-00277) for Schneider brand electrical components with an estimated value of $519,787.19 over two years, due June 18, 2026; City of Bartow issuing a solicitation for Master Lift Station Motor Control Center installation; Trinity Metro (Tarrant County, Texas) establishing an IDIQ electrical parts supplier contract, due August 20, 2026; and Gwinnett County, Georgia requesting competitive quotes for ballasts and capacitors, due June 12, 2026. Northside Independent School District issued a competitive sealed bid (IFB2026118) for electronic equipment, parts, repairs, rentals, and services, due September 24, 2026.