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AC Current Probe Model MD361 (BNC)

See the current, not just the number

The MD361 is a passive AC current probe that turns any oscilloscope into a window on your power system. Clamp it around a cable or busbar, connect the BNC to any scope — AEMC or otherwise — and read live current waveforms at 1 mV AC per 1 A AC. No external power, no batteries, no setup. Just open the jaw and measure.

Built for field techs, motor and dive troubleshooters, and power-quality work, the MD361 delivers the waveform fidelity you need to actually see what's happening — inrush spikes, PWM switching, harmonic distortion, phase imbalance — across a 5 Hz to 10 kHz range tuned for real-world power and motor signals.

Why the MD361

  • Asymmetic "hook" jaw — the uniquely shaped jaw opens wide and reaches into tight spots, clamping oversized busbars and large conductors that trip up conventional round-jaw probes.
  • Passive iron-core design — no external supply and no battery to die mid-measurement. Simpler and more affordable than Hall-effect probes, with very low output noise for its class.
  • High value, lower cost — professional AC waveform capture at a price well below comparable Hall-effect current probes. If you don't need DC, you shouldn't have to pay for it.
  • Voltage output, straight to your scope — clean 1 mV/A AC signal over an insulated 50 Ω BNC connector; works with virtually any oscilloscope.
  • For connection to any digital multimeter, order the Cat. #2119.94 Adapter - BNC (Female) to 4 mm Banana (Male), 600 V CAT III.
  • Safe by design — dual / reinforced insulation, rated CAT III 600 V and CAT IV 300 V, and compliant with IEC 61010-1 and IEC 61010-2-032 for current sensors.

AC only. The MD361 uses an iron-core (inductive) sensor and does not measure DC. For AC waveform work, that's exactly what keeps it simple and cost-effective.

 
NOTE: Our complete catalog is not available for direct online purchase, refer to the Status Column for purchasing options. Items that do not have an Add to Cart button must be purchased from an Authorized Distributor.
Model Cat. # Description List Price Quantity/Status
MD361 2153.10 AC Current Probe Model MD361 (500AAC, 1mVAC/AAC, BNC Output) $395.00
ModelMD361
Cat. #2153.10
DescriptionAC Current Probe Model MD361 (500AAC, 1mVAC/AAC, BNC Output)
List Price$395.00

Model MD361 - Cat. #2153.10: Includes current probe, safety sheet, and multilingual user manual.

Print
TECHNICAL SPECIFICATIONS 1
Model  MD361
ELECTRICAL
AC Range (1 to 500) A; 700 A max
Output Signal 1 mV/A
Typical Accuracy 2 % + 0.3 A (range dependent)
Frequency Range / Bandwidth 5 Hz to 10 kHz
Phase Shift 1° (100 to 500) A
3° (20 to 100) A
Overload 700 A for 10 min
MECHANICAL
Max Conductor Size Cable: ⌀ 1.18 in (30 mm)
Busbar: (2.48 x 0.20) in (63 x 5) mm
Output Termination Lead w/ BNC (50 Ω)
SAFETY
Safety Rating 600 V CAT III
300 V CAT IV
COMPATIBILITY
Compatible Instruments Oscilloscopes, DMMs
Note 1: Refer to the user manual for complete technical specifications
Consult factory for NIST Calibration prices.

User Manuals

AC Current Probe Model MD361 - English

Datasheets

AC Current Probe Model MD361 - English

AC Current Probe Model MD361 - Español

Comparison Charts

Current Probe Selection Chart - English

Current Probe Selection Chart - Español

Application Notes

Glossary of Current Probe Terms

Applications - Graphic Illustrations

Power Distribution (Switchgear) - Current Probes

Power Distribution (Motor) - Current Probes

Model Cat. # Description List Price Quantity/Status Distributor 
Stock Check
2119.94 Adapter – BNC (Female) to 4mm Banana (Male) 600V CAT III Replacement for Cat #2111.32 (Model SL361 only) $29.20
Model
Cat. #2119.94
DescriptionAdapter – BNC (Female) to 4mm Banana (Male) 600V CAT III Replacement for Cat #2111.32 (Model SL361 only)
List Price$29.20

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