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B551-2T is listed in the SCRs - Modules range at ChipApex. The manufacturer field lists Sensata-Crydom. Its product description is MOD DIODE SCR 25A 120VAC .250"QC. Review the specifications below when checking this part for your BOM.
The B551-2T is a discrete semiconductor module manufactured by Sensata-Crydom, classified as a Diode SCR assembly. It features a single-phase bridge configuration utilizing one Silicon Controlled Rectifier and one diode. The component is designed for base mounting with .250-inch quick-connect terminals. It supports an AC voltage rating of 120VAC and carries a current rating of 25A.
Verify the manufacturer designation carefully, as multiple vendors including HBControls and Cynergy 3 list this part number. Confirm that the specific unit matches the Sensata-Crydom description of a 25A, 120VAC Diode SCR module with .250-inch QC terminals before procurement.
Select this module when a low-voltage AC solid-state switch is required. Ensure the application voltage does not exceed 120VAC and the load current remains within the 25A limit. Verify that the .250-inch quick-connect interface is compatible with the system's terminal design.
This component belongs to the family of discrete semiconductor modules used for precise AC power regulation. Unlike standard relays, it offers silent operation and extended mechanical life. The specific configuration allows for controlled rectification or phase-angle firing in low-power industrial environments.
Cross-reference with other manufacturers listing B551-2T to ensure identical electrical ratings and terminal pitch. Verify that any substitute maintains the same SCR/diode bridge topology and .250-inch connection style.
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