Siglent CP6150 12 MHz 300 Amp Current Probe
The new Siglent CP6150 Current probe with 12 MHz Bandwidt a Maximum continuous current 150 Arms; Peak current 300 A; Switching ratio: 30 A/150 A; Accuracy: 30 A(±1%±10 mA); 150 A(±1%±100 mA); Standard DC12 V/1 A power adapter
300 A active current probe, DC–12 MHz
The CP6150 is an active split-core current probe with ±1% accuracy and 12 MHz of bandwidth, rise time ≤29 ns. 150 A continuous through a 20 mm jaw, with 12 MHz still on hand for the switching detail riding on it.
It runs from its own 12 V adapter and connects over BNC, so it works with any oscilloscope of any brand — unlike the SAPBUS-powered SCP5000 equivalents, which need a recent Siglent scope. Two ranges (30 A (10X) and 150 A (100X)) cover small and large currents, with over-current indication on each.
What it does well
The things that decide whether a current measurement can be trusted.
±1% accuracy
Far tighter than any handheld clamp, and the reason these probes are used for efficiency and switching-loss measurement where the number itself has to stand up in a report.
12 MHz bandwidth
Rise time ≤29 ns. Fast enough to show the current edge itself, not just the envelope it sits in.
20 mm jaw for real cable
Wide enough for the conductor sizes that actually carry 150 A — busbar tails, traction cable and inverter phase leads, not just bench wire. The 1.5 m lead reaches into a cabinet.
Works with any oscilloscope
Its own DC 12 V supply and a plain BNC output. No proprietary probe bus, so it is not tied to one brand or one generation of scope.
Split core, no circuit broken
Clamp around the conductor and the circuit stays intact — no shunt inserted, no burden resistance added to the thing you are characterising.
Over-current indication
Warns at ≥30 A on the low range and ≥300 A on the high one, so a saturated core gets noticed rather than quietly distorting the waveform.
Key specifications
- Bandwidth DC to 12 MHz (−3 dB), rise time ≤29 ns
- 150 Arms continuous · 300 A peak
- Ranges 30 A (10X) and 150 A (100X)
- Current transfer ratio 0.1 V/A and 0.01 V/A
- Resolution 10 mA and 100 mA
- Accuracy ±1% ±10 mA and ±1% ±100 mA
- Jaw accepts conductors up to 20 mm
- Powered by the supplied DC 12 V adapter
Application examples
Traction inverters and EV powertrain
Phase current on a drive or traction inverter, with headroom for the peaks and bandwidth for the switching detail riding on top.
Industrial motor drives
Large three-phase currents where the waveform — not just the RMS figure — determines fuse, capacitor and semiconductor sizing.
Grid-tied storage and PV inverters
True DC response for string and battery current, with the bandwidth to see the converter working on top of the DC level.
High-power supply and test rigs
Electrolysis, plating and burn-in supplies, where the current is far beyond what a handheld clamp can carry.
Specifications
| Bandwidth | DC to 12 MHz (−3 dB) |
|---|---|
| Rise time | ≤29 ns |
| Maximum continuous current | 150 Arms |
| Peak current | 300 A |
| Ranges | 30 A (10X) and 150 A (100X) |
| Current transfer ratio | 0.1 V/A and 0.01 V/A |
| Measurement resolution | 10 mA and 100 mA |
| DC accuracy | ±1% ±10 mA and ±1% ±100 mA |
| Overload indication | ≥30 A and ≥300 A |
| Maximum rated voltage to earth | 300 V CAT III · 600 V CAT II |
| Maximum conductor diameter | 20 mm |
| Probe cable length | 1.5 m |
| BNC lead length | 100 cm |
| Power supply | DC 12 V / 1 A adapter (supplied) |
| Weight | 555 g |
Taken from the SIGLENT Probe Data Sheet. Errors and omissions excepted; specifications may change without notice.
In the box
- Current probe
- DC 12 V / 1 A adapter
- BNC lead
- Instruction manual
Not sure this is the right probe?
Tell us the current you expect, the frequency it moves at, which oscilloscope you own and whether there is DC in the measurement. We will tell you which probe fits — including when a cheaper one covers it.