BK Precision 902406500 Shunt for DAS220 and DAS240 Series, 4 to 20mA, 50Ohm, 125mW. The BK Precision 902406500 is a 50 Ohm shunt designed for precise current measurement in electronic circuits. This shunt resistor is rated for a maximum power dissipation of 125 milliwatts, making it suitable for applications where accurate current measurement and low power dissipation are critical.