Chip Attenuators: Reading a Pi-Type Part Number
Decode a Walsin chip attenuator part number field by field: WA04P prefix, dB code, accuracy letter. All 23 parts, 0 to 20 dB at 0402 into 50 ohms.
September 26, 2026
Decode a Walsin chip attenuator part number field by field: WA04P prefix, dB code, accuracy letter. All 23 parts, 0 to 20 dB at 0402 into 50 ohms.
Walsin WF thin film reaches ±0.01% and ≦±3 ppm/°C. 52,808 of 58,314 parts are ±0.01%. Compared field by field against high precision thick film.
Walsin’s tantalum nitride MF series is 20,520 parts, every one 1206 and every one 2/5 W. 1,026 resistance values times 5 tolerances times 4 TCR grades.
Walsin’s 56,227 anti-sulfuration resistors sit in nine series under five part-number prefixes. SF thin film and SA arrays compared field by field.
Chinese New Year 2027 falls on Saturday 6 February. Confirmed holiday dates for China, Hong Kong, Taiwan and Singapore, plus a month-by-month ordering timeline and the other Asian shutdown windows.
What X7R, X5R, C0G and Y5V actually mean, how to read the EIA code, and the four Class II behaviours – DC bias, ageing, temperature drift and microphonics – that catch designers out.
Walsin MLCC part numbers decode in seven fixed fields: size, dielectric, capacitance, tolerance, rated voltage, termination and packaging. Full code tables and worked examples.