The Hioki 3276 Clamp On Probe is a wide-band AC/DC current probe covering DC to 100 MHz, designed for direct connection to the BNC input of an oscilloscope or recorder. Part of Hioki's 3270 series of clamp-on probes, the 3276 uses a newly developed indium-antimony (InSb) thin-film Hall element in its sensor head to detect current across a wide frequency range with high sensitivity.

The 3276 is used for current waveform observation in applications where a circuit break for a shunt or CT insertion is impractical. The datasheet illustrates waveform examples including 1 kHz and 1 MHz square wave response, transient response measurement, and low-current sine wave measurement at 10 mAp-p — applications spanning from milliampere-level signal observation up to the 30 Arms continuous rating.

Brand Heritage

Hioki E.E. Corporation is a Japanese precision measurement company founded in 1935, headquartered in Ueda, Nagano Prefecture. Hioki has operated continuously under the same name with no major corporate acquisitions or rebrands affecting its test and measurement product line, and its U.S. operations are conducted through Hioki USA Corporation.

Compare Other Models in This Series

Hioki's 3270 series of clamp-on probes provides wide-band current waveform observation with direct BNC output to oscilloscopes and recorders. The series spans four models — the 3273-50, 3274, 3275, and 3276 — covering bandwidths from DC to 2 MHz through DC to 100 MHz and continuous current ratings from 30 Arms up to 500 Arms. Each model shares the same architectural concept: a Hall-element sensor head with an in-line termination unit and BNC output for direct oscilloscope connection.

The series is positioned for current waveform observation tasks where conventional shunt or CT insertion is impractical due to the need for a circuit break. The datasheet's waveform examples — lighting inverter current, press machine load current, and automobile starter current — illustrate the range of applications the family addresses, from milliampere-level signal currents to several hundred amps of motor inrush.

Each new 3270-series model below is listed on its own product page with condition-matched pricing. Use the comparison table to identify the model whose bandwidth and continuous current rating match the measurement application, then click through to the corresponding model page for full specifications, current availability, and to request a quote.

The 3276 occupies the top of the 3270 series in terms of bandwidth, extending the upper frequency limit to 100 MHz (-3 dB) with a 3.5 ns rise time — the fastest in the family. Like the 3273-50, it carries a 30 Arms continuous rating and a 5 mm maximum conductor diameter. The bandwidth advantage over the 3273-50 (50 MHz) makes the 3276 appropriate for applications where higher-frequency switching components or fast edges must be resolved in the current waveform.

The four 3270-series models differ primarily along two axes: bandwidth and continuous current rating. The 3273-50 (DC to 50 MHz, 30 Arms) and 3276 (DC to 100 MHz, 30 Arms) are the low-current, high-bandwidth members of the family, both with 5 mm maximum conductor diameter and 0.1 V/A output rate. The 3274 (DC to 10 MHz, 150 Arms) and 3275 (DC to 2 MHz, 500 Arms) trade bandwidth for higher current capability, with 20 mm maximum conductor diameter and 0.01 V/A output rate.

The comparison table below summarizes the headline specifications across the four models. Select the model whose bandwidth covers the highest frequency content of interest in the current waveform, and whose continuous current rating accommodates the expected steady-state load with adequate margin for any peak or inrush conditions.

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

Accessories Supplied

• Instruction manual x 1
• Mark bands x 6

Product Core & Specifications

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.