GLF1608T220M Equivalent & Substitute Parts

Part Overview

The GLF1608T220M is a 22 µH shielded drum core wirewound inductor manufactured by TDK Corporation, designed for surface mount applications in the 0603 (1608 Metric) package. This component is rated for 100 mA continuous current with a 3Ohm DC resistance and operates across the temperature range of -40°C to 105°C. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

GLF1608T220M

TDK CorporationIn Stock: 17214GLF1608T220M Datasheet

Current PartRFQ

LQM21FN220N00L

Murata ElectronicsIn Stock: 3796LQM21FN220N00L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GLF1608T220M is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Inductance value must be 22 µH
• Inductance tolerance must accommodate circuit requirements
• Current rating must meet or exceed the application's maximum current demand
• DC resistance must be compatible with circuit impedance specifications
• Saturation current must support the operating current range

Mechanical Compatibility Criteria:

• Shielding type must be shielded to maintain electromagnetic isolation
• Core material must be ferrite
• Package form factor must be surface mount compatible
• Operating temperature range must cover the application environment
• Moisture sensitivity level must be acceptable for assembly and storage conditions

The substitute part LQM21FN220N00L meets the core inductance and shielding requirements but operates under different electrical constraints due to its multilayer construction and reduced current rating.

Parameter Comparison

Engineering Selection Recommendations

The LQM21FN220N00L serves as an active substitute for the obsolete GLF1608T220M based on matching inductance value and shielded ferrite construction. Both components maintain REACH compliance and unlimited moisture sensitivity ratings, supporting standard assembly and storage protocols.

Selection of the LQM21FN220N00L requires verification that the application's current requirements do not exceed 13 mA, as this substitute has significantly reduced current rating and saturation current compared to the original part. The substitute also operates at a maximum temperature of 85°C versus the original 105°C upper limit. The larger 0805 (2012 Metric) package footprint necessitates PCB layout modification. The reduced DC resistance of 455mOhm in the substitute provides lower power dissipation characteristics compared to the original 3Ohm specification.

Frequently Asked Questions (FAQ)

Q: Can the LQM21FN220N00L directly replace the GLF1608T220M without circuit modification?

A: Direct replacement is possible only if the application current remains below 13 mA. The GLF1608T220M is rated for 100 mA, while the LQM21FN220N00L is rated for 13 mA. PCB layout changes are required due to the package size difference from 0603 to 0805.

Q: What are the key differences in electrical performance between these inductors?

A: The main differences are current rating (100 mA vs. 13 mA), saturation current (35 mA vs. 13 mA), DC resistance (3Ohm vs. 455mOhm), and inductance tolerance (±20% vs. ±30%). The substitute has lower power dissipation due to reduced DC resistance but cannot support higher current applications.

Q: Are there temperature range considerations for substitution?

A: Yes. The GLF1608T220M operates to 105°C while the LQM21FN220N00L operates to 85°C maximum. Applications requiring operation above 85°C cannot use the substitute.

Q: How do the package size differences affect PCB design?

A: The GLF1608T220M uses 0603 (1608 Metric) packaging at 1.60mm × 0.80mm, while the LQM21FN220N00L uses 0805 (2012 Metric) packaging at 2.00mm × 1.25mm. PCB footprint and routing must be updated accordingly.

Q: What is the significance of the inductance tolerance difference?

A: The GLF1608T220M has ±20% tolerance while the LQM21FN220N00L has ±30% tolerance. Applications with tighter inductance specifications may require circuit compensation or alternative parts.

Q: Are both components compliant with environmental regulations?

A: Yes. Both the GLF1608T220M and LQM21FN220N00L are REACH Unaffected and maintain MSL 1 (Unlimited) moisture sensitivity ratings, supporting standard manufacturing and storage conditions.