Andrew Content Marketer
On Jul 7, 2025

BLM21PG221SN1D Ferrite Beads by Murata

BLM21PG221SN1D Ferrite Beads by Murata – High-Impedance EMI Suppression for Compact Electronics

The Ferrite Beads BLM21PG221SN1D by Murata are compact surface-mount EMI suppression components designed to block high-frequency noise while allowing DC or low-frequency signals to pass through. With 220 ohms impedance at 100 MHz, this bead is ideal for filtering unwanted noise in signal lines, power rails, and digital interfaces. As part of Murata’s trusted BLM series, the Ferrite Beads by Murata are widely used in smartphones, power supplies, IoT devices, and automotive electronics, offering high performance in a space-saving 0805 package.

In this blog, we’ll highlight the component's technical specs, features, applications, usage tips, and why it’s a top choice among engineers worldwide.

Technical Specifications of BLM21PG221SN1D

Manufacturer: Murata Electronics
Part Number: BLM21PG221SN1D
Series: BLM21
Impedance: 220O @ 100 MHz
Current Rating: 600 mA
DC Resistance (DCR): Max 0.25O
Package Size: 0805 (2.0 mm × 1.25 mm)
Mounting Type: Surface Mount (SMD)
Operating Temperature: -55°C to +125°C
Category: EMI Suppression, Ferrite Beads by Murata

This bead ensures effective suppression of high-frequency interference while maintaining signal integrity in compact circuit designs.

Key Features of BLM21PG221SN1D Ferrite Bead

220O High Impedance at 100 MHz – Efficient suppression of EMI and RF noise
Low DC Resistance – Minimizes voltage drop in sensitive power lines
0805 SMD Package – Compact size for dense PCB layouts
600 mA Rated Current – Suitable for power supply and signal lines
Murata Quality and Reliability – Consistent performance across a wide temperature range

These features make the BLM21PG221SN1D Ferrite Beads by Murata ideal for any application that demands compact, reliable EMI filtering.

Applications of Ferrite Beads by Murata

The Ferrite Beads by Murata are widely deployed in electronic systems that require suppression of high-frequency noise without sacrificing signal quality:

Smartphones, Tablets & Wearables
Automotive ECUs and Sensor Modules
Consumer Power Supplies and Adapters
Communication Devices and Routers
Medical and Industrial Equipment
Signal Conditioning in Digital Circuits

Thanks to their compact footprint and high impedance, the BLM21PG221SN1D Ferrite Beads by Murata are essential components in EMI-compliant system design.

Mounting and Assembly Overview

The BLM21PG221SN1D ferrite bead is compatible with standard SMT processes:

Apply solder paste on PCB pad
Place the component using pick-and-place machines
Reflow solder using recommended temperature profile
Perform post-soldering inspection for alignment and joint quality

Its robust ceramic construction ensures stability during thermal cycling and long-term usage.

Use Case Scenario: EMI Filtering in USB Power Line

Scenario: A designer working on a USB-powered sensor noticed EMI issues interfering with signal readings.

Problem: High-frequency noise from the power supply caused unstable data outputs.

Solution: The BLM21PG221SN1D Ferrite Beads by Murata were placed in series with the VBUS line to suppress conducted noise.

Result: Cleaner signals, improved USB stability, and full EMI compliance with regulatory standards.

This real-world example shows how Ferrite Beads by Murata enhance noise immunity in compact digital systems.

Download Datasheet for BLM21PG221SN1D

Looking for full electrical curves, S-parameters, or thermal ratings?

[Download BLM21PG221SN1D Datasheet from Xon Electronics]

Why Buy from Xon Electronics?

Xon Electronics offers original Ferrite Beads by Murata, including BLM21PG221SN1D, with:

100% Genuine Murata Components
Global Shipping – USA, India, Australia, Europe & more
Bulk Pricing for OEMs and Manufacturers
Technical Support for Design and Compatibility
Fast, Safe, and Secure Online Ordering

Get trusted EMI protection from Murata, available now at Xon Electronics.

Conclusion

The BLM21PG221SN1D Ferrite Beads by Murata offer a powerful solution to EMI challenges in high-frequency, compact electronics. With 220-ohm impedance at 100 MHz, low DCR, and robust Murata quality, this SMD bead fits perfectly in noise-sensitive designs. Available now from Xon Electronics with global shipping to the USA, India, Australia, Europe, and beyond.