BLM21AG331SN1D
Murata Electronics
Needs validationhigh risk
BLM21AG331SN1D is a lower-current 0805 option, not a direct 2A replacement.
Best Alternatives to BLM21PG221SN1D
BLM21PG221SN1D is a 220Ω, 2A 0805 ferrite bead for DC power lines. No listed option is a verified direct replacement.
AI replacement insight
Electrical riskhigh
Most options reduce current or alter impedance.
Package risklow
Kept options list 0805 packages.
Firmware risklow
Passive bead; no firmware impact.
Sourcing riskmedium
Some candidates are NRND or lack lifecycle clarity.
Can it be replaced directly?
No verified pin-compatible replacement is proven by the provided fields.
Best replacement path
Review BLM21AF121SN1K first if 120Ω impedance is acceptable.
Main risk
Current rating, DCR, and impedance differ across candidates.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | BLM21PG221SN1D | BLM21AF121SN1K | BLM21AG331SN1D | BLM21AG601SH1D | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0805 | 0805 | 0805 | 0805 | 0805 — same case; BLM21AG331SN1D: same case; BLM21AG601SH1D: same case |
| Pinout | 2 | 0 | 2 | 2 | 0 / 2 — pin count absent; BLM21AG331SN1D: 2 terminals; BLM21AG601SH1D: 2 terminals |
| Current | 2A | 2.5A | 800mA | 700mA | 2.5A / 800mA / 700mA — temp derating unknown; BLM21AG331SN1D: major derating; BLM21AG601SH1D: major derating |
| Resistance | 45mΩ | 40mΩ | 330Ω | 600Ω | 40mΩ / 330Ω / 600Ω — DCR OK; BLM21AG331SN1D: higher impedance; BLM21AG601SH1D: different filter |
| Application | DC power | low speed | general | automotive | low speed / general / automotive — role differs; BLM21AG331SN1D: use case differs; BLM21AG601SH1D: AEC-Q noted |
Application & sourcing insights
Questions & answers
BLM21AF121SN1K is the closest kept option on current and DCR, but its 120Ω impedance needs review.