# Tektronix TCPA400 DC–50 MHz AC/DC Current Probe Amplifier (with Power Cord) (Pre-Owned) # Tektronix TCPA400 DC–50 MHz AC/DC Current Probe Amplifier (with Power Cord) (Pre-Owned) ## Key Features At A Glance - AC/DC current measurement combining transformer and Hall-effect technology in a split-core probe design - Bandwidth spans DC–2 MHz to DC–100 MHz (–3 dB) across the series, depending on probe and amplifier pairing - DC continuous current ratings from 30 A to 500 A across the family (750 A derated with duty cycle on TCP404XL) - Measures from as low as 1 milliamp up to thousands of amps when used with the CT4 current transformer - Low insertion impedance reduces device-under-test loading, with AC/DC input coupling - Status LEDs flag probe-open, overload, termination, and non-compatible-probe conditions - On-screen scaling and units on TDS oscilloscopes via TEKPROBE Level II or TekConnect (TCA-BNC) - Safety certified for the U.S., Canada, and the European Union 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. ValueTronics stocks its inventory directly in a 20,000 square foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units leave our facility factory-sealed exactly as received from the manufacturer. ## 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 pre-owned 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. Model Bandwidth Max DC Current Rise Time **TCPA400** DC – 50 MHz — — TCP312 DC – 100 MHz 30 A ≤3.5 ns TCP305 DC – 50 MHz 50 A ≤7 ns TCP303 DC – 15 MHz 150 A ≤23 ns 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 Specification Value Electrical Characteristics Bandwidth (–3 dB) DC – 50 MHz AC Coupling Low Frequency Bandwidth <7 Hz (Low Pass –3 dB point) Inputs (Probe Amplifier) 1 Compatible Probe TCP404XL Status Indicators Probe Open Indicator Yes Overload Indicator Yes Termination Indicator Yes Non-compatible Probe Indicator Yes Power Requirements Power Requirements 90 V to 264 V; 47 to 440 Hz; 50 W; Maximum CAT II (Auto Switch) Mechanical Characteristics Length 17.3 cm (6.8 in.) Width 16.7 cm (6.6 in.) Height 9.14 cm (3.6 in.) Weight 1.14 kg (2.5 lbs.) General Warranty 1 Year > **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. ## About this Pre-Owned unit This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects. - Warranty included - Functional verification included - Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data. - Note that unnecessary accessories may not be included (contact Test Architect to confirm). 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.** ## Details - **Price:** 0.0 USD - **Vendor:** Tektronix - **Type:** Accessory - **Tags:** Accessories, Adapter, Curr Probe, Inc., Manufacturers, Model 400, Other Equipment, Pre-Owned, Probe, product_manual_group_2, Product_used, TCPA400, Tektronix ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 0.00 USD | In stock | ## Images - Tektronix TCPA400 DC–50 MHz AC/DC Current Probe Amplifier (with Power Cord) (Pre-Owned) --- > Source: [ValueTronics](https://valuetronics.com/products/tcpa400-tektronix-probe-adapter-used) > Updated: 2026-06-02