Fluke Y5020 AC / DC Shunt. 0-20A

The Fluke Y5020 is a precision four-terminal AC/DC current shunt rated for measurements up to 20 A DC or RMS AC across a frequency range of DC to 5 kHz. It delivers a proportional voltage output for direct integration with calibration systems and measurement instruments. The unit features forced-air cooling via an integrated rear-panel fan, enabling continuous operation without thermal drift.

The shunt mounts in a stackable PTI (Portable Test Instrument) case, forming integrated test systems with compatible Fluke instruments.

Technical Specifications

• Maximum Current Rating: 20 A DC or RMS AC


• Frequency Range: DC to 5 kHz


• Nominal Resistance: 0.01 Ω


• Accuracy (DC): ±1%


• Accuracy (DC to 1 kHz): ±0.01%


• Accuracy (1 kHz to 5 kHz): ±0.01%


• DC Current Uncertainty: ±100 ppm (referenced to certified absolute value)


• AC Current Uncertainty: ±(150 ppm + 120 ppm × frequency in kHz) relative to DC specification


• Resistance Stability: Less than 20 ppm change in six months


• Burden Voltage: Less than 250 mV DC at 20 A


• Temperature Coefficient: Less than 20 ppm/°C (0°C to 18°C and 28°C to 50°C)


• Power Coefficient: Less than 12 ppm per watt at 20 A


• Protection Class: Class 3

Key Features

• Four-terminal configuration minimizes lead resistance effects


• Forced-air cooling maintains accuracy during extended operation


• Dual binding posts for current input and voltage sense output


• Front-panel power switch controls fan operation


• Compact form factor: 127 mm H × 205 mm W × 36 mm D

Electrical Specifications

• Fan Input Power: 115 V AC or 230 V AC, ±10%, 50–60 Hz, 11 W maximum


• Input Protection: 1/8 A, 250 V AGC fuse

Compatibility & Integration Designed for stacking with other Fluke PTI instruments to build modular, portable calibration and measurement systems.