Is there a pin-compatible replacement for LQM21PN4R7MGRD?

No direct pin-compatible replacement with identical key parameters has been identified. LQM21PN3R3MGRD shares the same 0805 package but has a different inductance of 3.3µH, requiring engineering review.

What risks should I check before replacing LQM21PN4R7MGRD?

Key risks include package size mismatch, which requires a new PCB layout, and differences in inductance, which can alter circuit behavior like filter frequency or DC-DC converter stability. Always verify current rating and DCR.

LQM21PN4R7MGRD Alternatives, Datasheet & Cross Reference | Murata Manufacturing Co., Ltd.

Finding a substitute for the Murata LQM21PN4R7MGRD 4.7µH inductor involves trade-offs. While no direct drop-in replacement is listed, options exist with different packages or electrical parameters that may suit your design with review.

AI replacement insight

Electrical riskmedium

One option has lower inductance (3.3µH vs 4.7µH), which can alter circuit performance.

Package riskhigh

One electrically superior option is in a larger 1008 package, requiring a PCB layout change.

Sourcing risklow

Candidates are active and available from major distributors.

Can it be replaced directly?

No direct drop-in replacement with identical key parameters has been identified. All reviewed substitutes require engineering validation due to differences in package or inductance.

Best replacement path

For new designs, LQM2HPN4R7MG0L is a strong functional upgrade if the larger 1008 package is acceptable. For existing boards, LQM21PN3R3MGRD is an option if lower inductance is tolerable.

Main risk

No identified candidate is a direct drop-in replacement. Substitutes require either a board redesign for a different package or accepting a significant change in inductance.

Recommended alternatives

A parametric alternative in the same 0805 package with higher current rating but lower inductance (3.3µH).

View details

Alternative comparison matrix

Feature / factor	LQM21PN4R7MGRD	LQM21PN3R3MGRD	LQM2HPN4R7MG0L	Compatibility / risk
Package	0805 (2012 metric)	0805 (2012 metric)	-	1008 (2520 metric) — Larger package requires PCB redesign.
Inductance	4.7 µH	3.3 µH	-	4.7 µH — Inductance matches target.
Current	0.8 A	1.0 A	-	1.1 A — Higher current rating provides more margin.
Dcr	0.23 Ω	0.188 Ω	-	0.138 Ω — Lower DCR improves efficiency.

Application & sourcing insights

Questions & answers

LQM2HPN4R7MG0L offers matching inductance and superior current/DCR, but requires a board layout change to a larger 1008 package. For the same 0805 package, LQM21PN3R3MGRD is an option if a lower 3.3µH inductance is acceptable.