Launched in July 15, 2025
CPC2501M, a robust, self-actuating, normally closed solid-state relay optimized for chime bypass in video doorbell systems.

Designed to replace discrete relay circuitry, the CPC2501M is the first application-specific integrated circuit (ASIC) in the Littelfuse portfolio for this function. It integrates self-protection, fault timing, and solid-state switching into a single compact 6x6 mm QFN package—simplifying video doorbell integration while enhancing reliability and safety.

Key Features and Benefits
• Integrated self-actuating logic eliminates the need for external microcontrollers or software control
• Built-in fault protection timer (~17 seconds) automatically resets during prolonged button presses or chime failure
• High-performance switching with 60 VP bidirectional voltage and 1.84 ARMS continuous load current
• Peak current capability of 5 A for handling start-up and surge conditions
• Thermally optimized 6×6 mm QFN-16 package conserves PCB space for compact module designs
• Installable behind standard 8–24 VAC doorbell transformers