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Murata Electronics BLM15AG121SH1D — EMI Filters & Ferrite Beads

Murata BLM15AG121SH1D Ferrite Bead, 120 Ohm @ 100 MHz

MPNBLM15AG121SH1D
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Murata Electronics EMIFIL® BLM15 series ferrite bead, BLM15AG121SH1D, 0402 (1005 Metric) package, 120 Ohms @ 100 MHz, 500 mA, AEC-Q200.

$0.1000Ref. price · indicative, final on quote
Murata Electronics BLM15AG121SH1D datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BLM15AG121SH1D specifications
ParameterValue
SeriesEMIFIL®, BLM15
MountingSurface Mount
Current rating500mA
Impedance @ frequency120 Ohms @ 100 MHz
Operating temperature-55°C ~ 125°C
Height0.022\" (0.55mm)
Size (Dimension)0.039\" L x 0.022\" W (1.00mm x 0.55mm)
PackageTape & Reel (TR) Cut Tape (CT)
RatingsAEC-Q200
Case0402 (1005 Metric)
Number of lines1
DC resistance (DCR)250mOhm

Product details

120 Ohm suppression at 100 MHz, 500 mA continuous

The BLM15AG121SH1D is a single-line ferrite bead from Murata's EMIFIL® BLM15 series, delivering 120 Ohms impedance at 100 MHz — the standard suppression target for conducted EMI in the 100 MHz to 1 GHz range where most clock harmonics and switching noise live.

The 0402 (1005 Metric) footprint is the smallest common size for ferrite beads — it fits tight decoupling layouts near the IC power pin, but the 0.55 mm seated height means the pick-and-place nozzle clearance and solder-paste stencil aperture need to match the 0.5 A current path.

Frequently asked questions

What is the impedance of BLM15AG121SH1D at 100 MHz?

120 Ohms at 100 MHz, which is the typical suppression target for conducted EMI from clock harmonics and switching power supplies.

What is the maximum DC resistance of BLM15AG121SH1D?

250 mOhm maximum, which at 500 mA produces a voltage drop under 125 mV — negligible for most digital supply rails.