Key Features:
Miniature Coil Design: Slim, 3.5mm cross-section coil fits into tight spaces, making it ideal for semiconductor power switching devices.
High Frequency Bandwidth: Up to 50MHz (-3dB), enabling accurate measurements of switching transients and pulsed currents.
Wide Current Range: Capable of measuring currents from 300mA to 30kA.
Peak di/dt Capability: Measures peak di/dt up to 100kA/µs, ideal for detecting fast current transients.
Wide Operating Temperature: The probe operates in temperatures from -40°C to +125°C, suitable for harsh environments.
High Voltage Insulation: The coil features 5kV peak voltage insulation, ensuring safety during high-voltage applications.
Rogowski Coil Technology: Ensures faithful conversion of current to voltage, offering high bandwidth performance and low interference.
Electrostatic Shield: Provides immunity to interference from fast dV/dt transients and large 50/60Hz voltages.
Clip-around Coil: Flexible and easy to install, the clip-around coil makes it possible to measure currents in difficult-to-reach areas.
Available Models and Specifications:
| Model | Sensitivity (mV/A) | Peak Current (kA) | Noise (mV pk-pk) | Droop (%/ms) | LF Bandwidth (Hz) | Peak di/dt (kA/µs) | HF Bandwidth (MHz) | Coil Length 100mm (MHz) | Coil Length 200mm (MHz) |
| CWTMini50HF 015 | 200 | 0.03 | 20 | 85 | 150 | 2 | 50 | 23 | 23 |
| CWTMini50HF 03 | 100 | 0.06 | 18 | 78 | 100 | 4 | 50 | 23 | 23 |
| CWTMini50HF 06 | 50 | 0.12 | 12 | 70 | 75 | 8 | 50 | 23 | 23 |
| CWTMini50HF 1 | 20 | 0.3 | 9 | 53 | 50 | 20 | 50 | 23 | 23 |
| CWTMini50HF 3 | 10 | 0.6 | 15 | 11 | 12 | 40 | 50 | 23 | 23 |
| CWTMini50HF 6 | 5 | 1.2 | 15 | 5.5 | 6 | 80 | 50 | 23 | 23 |
| CWTMini50HF 15 | 2 | 3 | 12 | 2.8 | 3 | 80 | 50 | 23 | 23 |
Technical Specifications:
Peak Current Ratings: 0.03kA to 6.0kA (Higher ratings available)
Bandwidth: 0.1Hz to 50MHz
Accuracy: Typically 2% of the reading
DC Offset: No greater than 2mV
Coil Lengths: Available in 100mm and 200mm lengths (custom lengths up to 1000mm available)
Coil Cross Section: 4.5mm for 5kV peak voltage isolation
Cable Length: 1m, 2.5m, or 4m (specific models have maximum cable lengths: CWT015 max 1m, CWT03 max 1.5m, CWT06 max 2.5m)
Peak Voltage Isolation: 5kV (flash tested at 8kVrms for 60 seconds)
Temperature Range: -40°C to +125°C
Power Supply Options:
Battery: 4 AA lithium batteries (25-hour life) with 12-24V DC input socket.
Rechargeable: NiMH batteries (10-hour life) with 12-24V DC input socket. Rechargeable option comes with an AC/DC adapter for charging.
Typical Applications:
Power Electronics: Ideal for measuring high-frequency switching transients in IGBT and GaN devices.
Semiconductor Devices: Suitable for testing MOSFETs, IGBTs, and other high-speed switching devices.
Pulsed Current Measurement: For applications such as capacitor discharge, circuit breaker testing, and lightning strike research.
Induction Heating: Measures high-frequency, high-current signals, including harmonics and peak current transients.
Ordering Information:
Model Example: CWTMini50HF 06, 100mm coil, 2.5m cable, rechargeable power option (R).
Included Accessories: BNC-BNC cable, 12-24V DC adapter, user manual, factory calibration, and hard carry case.