One Article to Know CP3008 High Frequency AC/DC Current Probe

Micsig CP3008 is a high‑frequency AC/DC current probe specially designed for accurate high-current measurement. It features an 8 MHz bandwidth and dual‑range design of 50 A/300 A, supporting continuous current measurement up to 300 A and peak current up to 500 A with an accuracy of ±1% and a resolution as high as 10mA in the low-range mode. Equipped with one click degaussing and auto-zero functions, it adopts an universal BNC interface compatible with oscilloscopes of all mainstream brands. It serves as a professional testing tool for R&D and measurement applications such as new-energy vehicles, switching power supplies, and semiconductor devices.

1. Key Parameters

• Bandwidth： DC ~ 8MHz
• Rise Time： ≤ 53ns
• Max. Current Input: 300Arms，500Apk
• Dual-Ranges： 50Arms / 300Arms
• Accuracy： ±1%
• Lowest Measurable Current： 10mA
• Max. Conductor Diameter： 20mm
• Interface： Universal BNC
• Power Supply： DC 12V

2. Product Advantages

2.1 Dual Range Design, One Probe for Multiple Scenarios

It features switchable 50A and 300A ranges, balancing wide measurement coverage and fine resolution. The high range supports 300Arms continuous current and 500A peak current, ideal for high-power applications such as motor drives and charging piles. Switched to the low range, its 10mA resolution captures subtle small-current details of standby power consumption and control circuits. One single probe meets demands from laboratory precision testing to on-site industrial high-current monitoring.

2.2 Intelligent Functions for Easier Testing

One click Degaussing&Zeroing: Press the Zero button, and the probe automatically performs degaussing and zero-point calibration with power-on auto-initialization, eliminating tedious manual calibration required by traditional current probes.

Real-time Status Indication: The UNLOCK light illuminates when the jaw is not fully closed, and the OVERLOAD light alerts for over-range current. Critical working status is clearly displayed to avoid measurement errors or equipment damage caused by misoperation.

2.3 User-friendly Design for Better Daily Experience

The 20 mm large jaw easily clamps thick wires of charging piles and motor busbars without circuit modification. Its portable body enables one-hand operation, ensuring flexible use even in compact cabinets or crowded workbenches.

3. Classic Application Scenarios

• New Energy Vehicle Design

Accurately measure high-current waveforms of motor controllers, on-board chargers and DC charging piles, capture detailed current changes during IGBT switching, and provide reliable data for efficiency optimization and safety verification of high-power drive systems.

• Switch-Mode Power Supply & Inverter R&D

The 8 MHz bandwidth effectively captures high-frequency switching current signals. The dual-range design suits power supply tests ranging from tens of watts to several kilowatts, helping engineers analyze switching losses and optimize circuit efficiency and stability.

• Semiconductor & Industrial Control

With ±1% accuracy and strong anti-interference capability, it clearly restores every detail of current waveforms in dynamic characteristic tests of power semiconductor devices and current harmonic analysis of frequency converters.

• Electrical Experiments & Teaching

High resolution of 10 mA and convenient one-click zeroing are ideal for classroom demonstrations. The dual-range covers various experiments from small-signal characteristics to high-current responses, helping students intuitively understand AC and DC current properties.

4. Standard Accessories

5. Other Model Options in the Series

Besides the CP3008, Micsig CP series high-frequency AC/DC current probes (for high-current measurement) include CP3005 and CP1510 to meet more refined application requirements:

CP3005 :

It shares the same 300 Arms/ 500Arms current range as the CP3008, with a bandwidth of 5MHz. For medium to low frequency high-current tests such as power-frequency transformers, inverters and industrial power distribution systems, the CP3005 offers a balanced choice of performance and cost effectiveness.

CP1510 :

With an upgraded 10MHz bandwidth and a rise time of only 46ns, it delivers the fastest high-frequency response in the series. It supports up to 150Arms peak current, making it ideal for applications requiring detailed high-frequency signal capture with moderate current amplitude, such as precise measurement of dynamic switching losses in semiconductor devices.

Whichever model you choose, all CP series probes share the same intelligent auxiliary functions, 20mm large jaw, universal BNC interface and ±1% measurement accuracy. Users can make flexible selections according to actual bandwidth and current-range requirements.