What are Current Transducers?

Current transducers are measurement devices used to convert an electrical current flowing in a conductor into a proportional output signal suitable for monitoring, control, or protection systems. They provide galvanic isolation between the primary current path and the measurement circuitry, enabling safe and accurate sensing in power electronics and electrical systems.

The operation of a current transducer depends on its sensing principle and signal conditioning architecture, which together determine accuracy, bandwidth, and response behavior. By translating input current into a standardized electrical output, current transducers allow integration with control electronics, data acquisition systems, and protection circuits. Key specifications define how the device interfaces with the measured circuit and the downstream electronics.

Key Specifications

• Type: The type defines whether the current transducer is designed to measure alternating current, direct current, or both. This distinction determines the sensing principle used and affects frequency response, signal processing requirements, and suitability for specific power electronics applications.
• Input Current: Input current defines the magnitude of current in the primary conductor that the transducer is designed to measure. This specification determines compatibility with the monitored circuit and impacts core design, thermal performance, and linearity.
• Output Current: Output current specifies the form and level of the transducer’s output signal representing the measured input current. It defines how the device interfaces with external control, monitoring, or protection electronics.
• Supply Voltage: Supply voltage defines the external power required for the operation of the transducer’s internal electronics. This parameter affects signal conditioning capability, operating stability, and compatibility with system power rails.
• Frequency: Frequency specifies the range of signal frequencies over which the transducer can accurately track changes in the measured current. It determines the device’s suitability for steady-state, dynamic, or rapidly changing current waveforms.

The Largest Database of Current Transducers

everything PE has listed Current Transducers from the leading manufacturers and made them searchable by specification. You can enter the key parameters and the search tool will scan catalogs from the leading manufacturers to identify products that meet your spec. Once you find Current Transducers that meet your requirements, you can view product information, download datasheets or request quotations. Quotation requests will be routed to the manufacturer of the product who will get back to you directly. The quotation will also be routed to distributors of the product in your region.