The TCP300 and TCP400 series is an AC/DC current measurement family built around split-core current probes paired with the TCPA300 or TCPA400 probe amplifiers. The probes incorporate both transformer and Hall-effect technology to provide broadband current measurement from DC up to 100 MHz, at current levels ranging from as low as 1 milliamp to thousands of amps when used with the CT4 current transformer. The system connects to Tektronix TDS oscilloscopes carrying TEKPROBE Level II or TekConnect (with TCA-BNC) interfaces, where current measurements and calculations become simple and easy.

The listed applications center on development and analysis work, including power supplies, semiconductor devices, power inverters and converters, electronic ballasts, industrial and consumer electronics, mobile communications, motor drives, and transportation systems. Additional measurement capability is available with add-on software such as the TDSPWR2 power measurements package, which supports power measurements and calculations on compatible TDS oscilloscopes.

Compare Other Models in This Series

The TCP300 and TCP400 series is a family of AC/DC current measurement systems in which split-core current probes pair with one of two probe amplifiers. The TCPA300 amplifier works with the TCP312, TCP305, or TCP303 probes, while the TCPA400 amplifier works with the TCP404XL probe, together spanning a wide range of current measurement capability from low-level milliamp measurements up to very high current levels.

Each probe-and-amplifier pairing targets a different combination of bandwidth and maximum current, allowing the measurement setup to be matched to the conductor and signal under test. The probes incorporate both transformer and Hall-effect technology to achieve broadband response from DC through the megahertz range.

Each model in this family below is its own dedicated product page with condition-matched pricing. Select the new listing that corresponds to the probe or amplifier configuration you need, and review that page for its specifications and availability.

The family's models differ primarily in bandwidth, maximum current, and rise time. The TCP312 with the TCPA300 provides DC–100 MHz bandwidth at 30 A DC continuous with a rise time of ≤3.5 ns; the TCP305 provides DC–50 MHz at 50 A DC; the TCP303 provides DC–15 MHz at 150 A DC; and the TCP404XL with the TCPA400 provides DC–2 MHz at 500 A DC continuous (750 A derated with duty cycle). As bandwidth decreases across the probes, maximum current capability and rise time increase.

Mechanical characteristics follow the same pattern: probe jaw size, dimensions, weight, and cable length scale with the higher-current probes. The comparison table below details the bandwidth, current ratings, rise time, and physical characteristics for each configuration.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Accessories Supplied

• AC/DC Current Probe Amplifier
• Instruction/Service Manual
• TEKPROBE Interface Cable
• Male-to-Male BNC cable (50 Ω)
• 50 Ω feedthrough termination
• Certificate of Traceable Calibration

Product Core & Specifications

Important: Nominal maximum bare wire voltage: 600 V RMS CAT I & II, 300 V RMS CAT III — for use with insulated wires only.

Important: The TCP312, TCP305, and TCP303 current probes each require a TCPA300 amplifier, and the TCP404XL current probe requires a TCPA400 amplifier; the probes and amplifiers are ordered separately and neither measures current on its own.

Important: Direct on-screen scaling and units require a TDS TEKPROBE oscilloscope or a TekConnect oscilloscope with a TCA-BNC adapter; non-TEKPROBE systems can still be used by multiplying the measured output voltage on the oscilloscope by the TCPA300/TCPA400 range setting.

Important: The TCP404XL is rated 500 A DC continuous (750 A DC derated with duty cycle).

Important: CE mark is not applicable for the TCP305 and TCP312.

Recommended pairing: use the TDSPWR2 Power Measurement and Analysis Software with compatible TDS5000 and TDS7000 oscilloscopes to automate the power measurements and calculations described for this current measurement system.

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.