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Overview
The Ultra-High-Frequency Current Shunt (UFCS) has achieved a paradigm shift in current measurement technology, setting a new benchmark for technological advancement.
With a bandwidth exceeding 1GHz and ultra-low insertion inductance (
making PMK's non-inductive frequency response shunt an ideal choice for challenging measurements such as wide bandgap (WBG) switch loss or pulsed current analysis.
The UFCS series shunts feature a compact form factor and high current-carrying capability, ensuring consistent and reliable performance.
Whether measuring Gallium Nitride (GaN) switch loss or analyzing high-frequency transients, this solder-in shunt always guarantees the highest accuracy.
UFCS is the result of advancements in current measurement technology in modern power electronics and remains unsurpassed to this day.
For measurements requiring the highest common-mode rejection ratio (CMRR), UFCS can be connected to optically isolated voltage probes, such as PMK's FireFly®.
For general-purpose measurements, UFCS can also be directly connected to instruments with a 50Ω input.
The first models in the UFCS shunt series include 11 milliohm, 24 milliohm, and 52 milliohm versions.
——— Related Applications ———
——— Related Products ———
PMK FireFly®FF-1500A optically isolated probe 1.3 GHz/1.5 GHz high CMRR (180 dB) high-voltage 2500 V double-pulse VGS gate /VDS drain voltage
IWATSU multi-channel high-voltage high-frequency optically isolated measurement probe Isolation SE-6000 remote UHV safety test system
CIC high-voltage differential probe DP20-20K-LVC high-precision 0.1% high-frequency isolated high CMRR 20 kV
Specifications
| Parameter | Value |
| Thermocouple Type | ultra-fast current shunt (non-inductive resistor) for WBG switching-loss and pulsed-current measurement |
| Operating Temperature | -40 °C to +85 °C (-40 °C to +30 °C under non-pulsed conditions) |
| Storage Temperature | -40 °C ~ +85 °C |
| Input / Output Connector | shunt: solder-pad input / SMA female output; choke: SMA male input / BNC male output |
| Input Coupling of Measuring Instrument | 50 Ω (or 1 MΩ input with 50 Ω feed-through termination) |
| Operating Humidity | 80 % RH (up to +31 °C), decreasing linearly to 40 % at +50 °C, non-condensing |
| Operating Altitude | up to 2000 m (non-operating up to 15000 m) |
| Warranty | 1 year |
| Note | controlled environment only (IEC 61010-1); not hand-held; not CAT II/III/IV rated |
Models in Series - Comparison
| Order Number | Shunt Resistance | Gain | Bandwidth (-3 dB) | Insertion Inductance | Max 1 µs Pulse Current | Max 100 µs Pulse Current | Continuous Current |
| UFCS-R001 | 1 mΩ | to be determined | > 600 MHz | to be determined | to be determined | to be determined | |
| UFCS-R005 | 5 mΩ | to be determined | > 800 MHz | to be determined | to be determined | to be determined | |
| UFCS-R011 | 11 mΩ | 10.6 mV/A | > 1 GHz | 110 pH | 340 A | 105 A | 7.3 A |
| UFCS-R024 | 24 mΩ | 23.6 mV/A | > 1 GHz | 140 pH | 230 A | 70 A | 4.9 A |
| UFCS-R052 | 52 mΩ | 51.1 mV/A | > 900 MHz | 150 pH | 160 A | 50 A | 3.4 A |
Expand
* Specifications are subject to change without notice.