IoT Passive Components: A Sensor Node Selection Checklist
IoT passive components checklist: Walsin ultra-small 01R5 MLCC, 2.4 GHz chip antennas and small inductors, with real part numbers and real counts.
October 6, 2026
IoT passive components checklist: Walsin ultra-small 01R5 MLCC, 2.4 GHz chip antennas and small inductors, with real part numbers and real counts.
Medical device passive components: Walsin’s X1/Y1 safety capacitors, what documentation exists, and exactly what Venatech does and does not certify.
Motor drive passive components checklist: Walsin current-sense resistors, high-voltage MLCC and X1/Y2 safety caps, with real part numbers and real counts.
0805 is the smallest Walsin MLCC case size rated to 1000 Vdc, and 1206 the smallest at 2500 Vdc. A how-to for LED driver MLCC, resistors and MOV selection.
Only 20 of Walsin’s 146 inductors with a saturation current have a plausible DCR. A checklist for AI server VRM inductors, sense resistors and bulk MLCC.
148 of Walsin’s 2,294 AEC-Q200 MLCC clear 500 Vdc or more. Real MT, ST, MG, high-voltage resistor and MOV part numbers for an EV OBC design.
Walsin’s 34mm Industrial MOVs split 40,000A (34R) vs 80,000A (34RD) — a last-character rule misfiles 21 parts. Only the 53mm disc reaches 1181Vdc.
Walsin’s 929 disc capacitors split into two voltage systems: a 7-step DC ladder to 6000Vdc, and 7 AC safety ratings. Only a third state both figures.
Walsin’s disc capacitor T.C. column is empty on all 929 rows. The temperature coefficient has to be read from the dielectric code in the part number.
Walsin’s 235 RF filters decode by prefix: RFBPF band pass, RFLPF low pass, RFBPB balanced. Band is not reliably coded in the part number — use Application.