Q13FC13500004

Q13FC13500004 is a 32.768 kHz tuning-fork crystal from Epson's FC-135 series in a 3.2 x 1.5 x 0.9 mm SMD case, listed in Epson's official part-number database. The database values: load capacitance 12.5 pF, equivalent series resistance 70 kΩ maximum, frequency tolerance ±20 ppm at +25 °C (at a 0.1 µW drive level), turnover temperature +25 °C ±5 °C, parabolic coefficient −0.04 ppm/°C² (the maker's maximum figure), aging ±3 ppm maximum in the first year at +25 °C, maximum drive level 0.5 µW, gold-plated terminals, operating range −40 °C to +85 °C. The selection point is the RTC default: 12.5 pF is the load most real-time-clock designs are laid out for. Ordering form: this page carries the stable base code from Epson's database — the final orderable form adds a two-character packing suffix, so the complete string is confirmed when you request a quote rather than assumed here. Selection advice: the suffix is the specification — the sibling code Q13FC13500049 in the same case is the 6 pF version, each verified from Epson's database separately; a load-capacitance mismatch here is a clock that runs off-frequency by design, so match the full code to your oscillator circuit's CL.