3 2 x 2 5 smt act320smx 4 series crystals act bn4000ikgoofl pf 3 2x2 5mm smd crystal act320smx 4 series 40mhz frequency 30ppm tolerance 320smx 4 12pf load capacitance 50r esr at fundamental resonance these are low cost high quality 4 pad crystals that are designed for surface mounting applications at cut crystal fundamental mode operation low aging gold plated pad surfaces ceramic base metal lid package package seam welded for long term reliability lid grounded via package to