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Best Alternatives to BLM31PG330SN1L

Package: 1206 (3216 metric)Murata Manufacturing Co., Ltd.Ferrite Beads and ChipsImpedance @ 100 MHz: 33 Ω ±25%Rated Current @ 85°C: 6000 mARated Current @ 125°C: 3500 mADC Resistance (Initial): 0.009 Ω max.Package / Case: 1206 (3216 metric)

BLM31PG330SN1L is a 1206 high-current ferrite bead for DC power lines. Alternatives need impedance and derating checks.

AI replacement insight

Electrical riskmedium

impedance differs

Package riskmedium

pinout not verified

Firmware risklow

passive part

Sourcing riskmedium

lifecycle sparse

Can it be replaced directly?

Direct replacement for BLM31PG330SN1L should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with BLM31KN121SN1L, then verify pinout, impedance curve, and current derating.

Main risk

Electrical behavior changes because kept options are 120Ω instead of 33Ω.

Recommended alternatives

2
BLM31KN121SN1L package
BLM31KN121SN1L

Murata Electronics

Needs validationmedium risk

BLM31KN121SN1L matches package and 6A rating but raises impedance to 120Ω.

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Alternative comparison matrix

Feature / factorBLM31PG330SN1LBLM31KN121SN1LBLM31KN121SH1LAlt 3Compatibility / risk
Package1206120612061206 — same case; BLM31KN121SH1L: same case
Pinout2 pins2 pins2 pins2 pins — pin function missing; BLM31KN121SH1L: pin function missing
Current6A@85C6A@85C6A6A@85C — 85C rating aligns; BLM31KN121SH1L: basis needs check
Resistance0.009Ω max0.009Ω max0.009Ω0.009Ω max — DCR aligns; BLM31KN121SH1L: DCR aligns
ApplicationDC power linegeneral EMIAEC powertraingeneral EMI / AEC powertrain — must validate; BLM31KN121SH1L: EMI retest

Application & sourcing insights

Questions & answers

Verified drop-in options for BLM31PG330SN1L are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.