The Keithley 6521 10-Channel Low-Current Scanner Card is designed for switching low currents in multipoint testing applications, or for when the test configuration must be changed. The offset current on each channel is less than 1pA and high isolation is maintained between each channel (>1015W). The 6521 maintains the current path even when the channel is deselected, making it a true current switch. BNC input connectors help provide shielding for sensitive measurements and make the card compatible with low-noise coaxial cables. The 6521 is well-suited for automating reverse leakage tests on semiconductor junctions, or gate leakage tests on FETs.