SMD Inductor LQM21FN100M80L

What is LQM21FN100M80L?

The LQM21FN100M80L is an SMD Inductor manufactured by muRata (Murata). Key specs include a fixed inductance of 10µH, a rated current of 100mA, and a maximum DC resistance of 390 MOhm. Fully RoHS compliant, it is engineered for power line filtering and noise suppression in space-constrained portable electronics.

✔ RoHS Compliant  /  ✔ SMD  /  ✔ Murata Quality  /  ✔ Long-Term Supply

Typical Applications & Why This Part Fits

• Power Line Decoupling for Wearables: The 10µH fixed inductance paired with a 100mA current rating makes it ideal for isolating noise in compact, battery-powered wearables where space is at a premium.
• RF Module Supply Filtering: The 390 MOhm DCR ensures minimal resistive losses in BLE and Zigbee module power rails, optimizing overall system efficiency and extending battery life.
• Sensor Interface Filtering: Murata’s LQM series provides excellent high-frequency noise attenuation, and the SMD package fits perfectly into the tightly packed PCBs of IoT sensor nodes.

Key Features & Advantages

• Precise Inductance Value (10µH): Ensures stable and repeatable filtering performance across production batches, critical for sensitive analog and digital circuit operation.
• Optimized DC Resistance (390 MOhm): Balances size and performance, significantly reducing I²R power losses compared to higher DCR alternatives available in the same SMD footprint.
• Compact SMD Form Factor: Enables high-density PCB layouts without compromising the effective magnetic shielding that the Murata LQM construction is known for.

Frequently Asked Questions

1. Q: What makes LQM21FN100M80L different from a standard multilayer chip inductor?
   A: Unlike standard high-frequency inductors, this Murata LQM21F part is specifically designed for DC power supply lines, utilizing a unique internal electrode pattern to provide stable inductance under DC bias.
2. Q: Is LQM21FN100M80L RoHS compliant?
   A: Yes, as a standard Murata product, it is fully RoHS compliant and lead-free, meeting current environmental regulations for electronic components.
3. Q: How does the 10µH inductance value behave near the rated 100mA current?
   A: The LQM21F series is engineered to maintain stable inductance characteristics with minimal degradation as the DC current approaches the rated value, ensuring reliable circuit behavior.

Cross Reference & Alternative Sourcing

While LQM21FN100M80L is our primary recommendation, please verify your specific circuit requirements. Contact us for datasheets, samples, or alternative sourcing options for this SMD inductor.