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CR9550-20 is listed in the Current Sensors range at ChipApex. The manufacturer field lists CR Magnetics Inc.. Its product description is SENSOR CURRENT XFMR 20A AC. Review the specifications below when checking this part for your BOM.
The CR9550-20 is a self-powered AC current sensor manufactured by CR Magnetics Inc. It utilizes a solid core transformer design with a single pass-through configuration, supporting an input range of 0 to 20 Amperes AC. The device provides a 0 to 5 VDC output signal and operates within a frequency range of 50 to 400 Hz. Designed for bidirectional measurement, it requires no external power supply for the sensing element, relying instead on the measured current for operation.
Verify the specific suffix designation when ordering, as the CR9550-20-M variant is explicitly documented in official catalogs. Ensure the application environment supports the specified 50-400 Hz frequency range. Confirm that the required output voltage level aligns with the 0-5 VDC specification provided in the manufacturer documentation.
Select this component for applications requiring isolated AC current sensing without auxiliary power. The 20A rating defines the maximum continuous input. Consider the solid core form factor for installation constraints. Verify compatibility with downstream conditioning circuitry accepting the standard voltage output range.
This part belongs to the CR Magnetics line of current sensors and transducers. The series includes various models differentiated by current ratings and output types. The CR9550-20 represents the specific 20A AC variant within this product family, distinguished by its self-powered transformer architecture.
The HAT 800-S from LEM USA Inc. is listed as a comparable alternative in public databases. Note that the replacement offers Hall effect technology and significantly higher current capacity (800A), differing fundamentally from the 20A transformer-based design.
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