GLFR1608T4R7M-LR Equivalent & Substitute Parts

Part Overview

The GLFR1608T4R7M-LR is a 4.7 µH shielded inductor manufactured by TDK Corporation, designed for surface mount applications in the 0603 (1608 Metric) package. This component is rated for 500 mA continuous current with a DC resistance of 240 mOhm and operates across the temperature range of -40°C to 105°C. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

GLFR1608T4R7M-LR

TDK CorporationIn Stock: 18676GLFR1608T4R7M-LR Datasheet

Current PartRFQ

MLZ1608M4R7WT000

TDK CorporationIn Stock: 161258MLZ1608M4R7WT000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GLFR1608T4R7M-LR is determined by the following critical parameters:

• Inductance Value: Must be 4.7 µH with ±20% tolerance
• Package / Case: Must be 0603 (1608 Metric) for PCB footprint compatibility
• Shielding: Must be shielded to maintain electromagnetic isolation
• Current Rating: Substitute must support the application's current requirements
• DC Resistance: Lower DCR values provide improved efficiency; higher values may be acceptable depending on circuit design
• Operating Temperature Range: Must cover the application's thermal operating window
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The MLZ1608M4R7WT000 meets these substitution criteria as an active, in-stock alternative from the same manufacturer.

Parameter Comparison

Engineering Selection Recommendations

The MLZ1608M4R7WT000 is the primary substitute for the obsolete GLFR1608T4R7M-LR. Both components are manufactured by TDK Corporation and share identical inductance values, package dimensions, and compliance certifications (ROHS3, MSL 1).

Key considerations for selection:

• Current Rating Difference: The MLZ1608M4R7WT000 is rated for 350 mA versus the original 500 mA. Applications requiring the full 500 mA rating must evaluate whether the 350 mA rating is sufficient for the intended circuit.
• DC Resistance: The substitute exhibits 500 mOhm DCR compared to 240 mOhm in the original. This increased resistance results in higher power dissipation and should be evaluated in power-sensitive applications.
• Temperature Range: The MLZ1608M4R7WT000 provides an extended operating range (-55°C to 125°C) compared to the original (-40°C to 105°C), offering broader thermal coverage.
• Product Status: The MLZ1608M4R7WT000 is active and widely available, ensuring long-term supply continuity.
• Compliance: Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating, suitable for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can the MLZ1608M4R7WT000 directly replace the GLFR1608T4R7M-LR in all applications?

A: Direct replacement is possible for applications where the 350 mA current rating and 500 mOhm DCR are acceptable. Circuits designed specifically for the 500 mA rating or requiring the lower 240 mOhm resistance must be re-evaluated.

Q: What is the impact of the increased DC resistance on circuit performance?

A: The 500 mOhm DCR in the substitute versus 240 mOhm in the original results in approximately 2.08 times higher resistive losses. In applications with significant current flow, this translates to increased heat generation and potential voltage drop across the inductor.

Q: Are the package dimensions identical between the two parts?

A: Both components use the 0603 (1608 Metric) package with identical length and width (1.60mm x 0.80mm). The seated height differs slightly (1.00mm versus 0.95mm), which is negligible for standard PCB assembly.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both the GLFR1608T4R7M-LR and MLZ1608M4R7WT000 are ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, suitable for standard manufacturing and storage environments.

Q: What is the difference in operating temperature ranges?

A: The original operates from -40°C to 105°C, while the substitute operates from -55°C to 125°C. The substitute provides extended low-temperature performance and higher maximum operating temperature, beneficial for applications in extreme thermal environments.