Power Electronics

UL Certifies High-Power Solid-State Relays

Crydom’s solid-state relays (SSRs) are the industry’s first to obtain UL-approved short-circuit current ratings (SCCRs). These relays facilitate industrial control panel builders' efforts to comply with article 409 from the NEC, and the latest version of UL508A. Both request SCCR marking by providing pre-approved ratings for an SSR/fuse combination. Crydom has obtained UL approval for SCCRs by testing the combination SSR/Fuse under the "umbrella fuse" requirement, allowing more flexibility to Crydom customers to mix and match SSR and fuses of different ratings.

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