L0805C4R7MDMIT Equivalent & Substitute Parts

Part Overview

The L0805C4R7MDMIT is a 4.7 µH shielded multilayer inductor manufactured by KEMET, designed for surface mount applications in the 0805 (2012 Metric) package. This component is rated for 700 mA continuous current with a maximum DC resistance of 280 mOhm and operates across the temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

L0805C4R7MDMIT

KEMETIn Stock: 2759L0805C4R7MDMIT Datasheet

Current PartRFQ

LQM21PN4R7MGSD

Murata ElectronicsIn Stock: 3732LQM21PN4R7MGSD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the L0805C4R7MDMIT is determined by strict equivalence across the following critical parameters:

Inductance Value: The substitute must provide 4.7 µH with ±20% tolerance to maintain circuit performance within design specifications.

Package Compatibility: The substitute must use the 0805 (2012 Metric) surface mount package to ensure PCB footprint compatibility without layout modifications.

Shielding Type: The substitute must be shielded to maintain electromagnetic isolation equivalent to the original design.

Core Material: The substitute must use ferrite core material to preserve frequency response and thermal characteristics.

Current Rating: The substitute must support the application's current requirements. A substitute with equal or higher current rating (700 mA or greater) is acceptable.

DC Resistance: The substitute's DCR must not exceed the original specification to prevent excessive power dissipation. Lower DCR values are acceptable.

Operating Temperature Range: The substitute must support the full -40°C to 85°C operating range.

Compliance Standards: The substitute must maintain ROHS3 compliance and REACH unaffected status for regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The LQM21PN4R7MGSD from Murata Electronics is a direct functional substitute for the obsolete L0805C4R7MDMIT. Both components share identical inductance values, tolerance specifications, package dimensions, and operating temperature ranges. The Murata substitute provides a higher current rating (750 mA versus 700 mA), which offers improved headroom for the application.

The primary design consideration is the DC resistance differential. The LQM21PN4R7MGSD exhibits a maximum DCR of 363 mOhm compared to the original 280 mOhm specification. This 83 mOhm increase results in proportionally higher resistive losses. Applications sensitive to power dissipation or thermal performance must evaluate whether this DCR increase remains within acceptable operating parameters.

The Murata substitute maintains full ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The substitute's active product status provides long-term availability and supply chain stability compared to the obsolete KEMET part. The lower seated height (1.00mm versus 1.25mm) of the Murata component offers a minor mechanical advantage for space-constrained designs without affecting electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the LQM21PN4R7MGSD directly replace the L0805C4R7MDMIT without PCB modifications?

A: Yes. Both components use the 0805 (2012 Metric) surface mount package with identical footprint dimensions (0.079" L x 0.049" W). No PCB layout changes are required for mechanical compatibility. The Murata substitute's lower seated height (1.00mm) presents no clearance issues.

Q: How does the higher DC resistance of the substitute affect circuit performance?

A: The LQM21PN4R7MGSD exhibits 363 mOhm maximum DCR versus the original 280 mOhm specification, representing an 83 mOhm increase. This results in higher resistive losses proportional to the square of the operating current. At 700 mA operation, the additional power dissipation is approximately 41 mW. Applications operating near thermal limits must evaluate this increase against design margins.

Q: Are both components suitable for the same frequency range?

A: Both components are tested at 1 MHz inductance frequency. The Murata substitute specifies a self-resonant frequency of 20 MHz. Both components are ferrite-core shielded inductors suitable for equivalent frequency applications within their respective specifications.

Q: What is the significance of the higher current rating on the Murata part?

A: The LQM21PN4R7MGSD is rated for 750 mA continuous current compared to the original 700 mA rating. This 50 mA additional capacity provides design margin and reduces the risk of saturation-related performance degradation in applications operating at or near the original current specification.

Q: Do both parts maintain the same moisture sensitivity classification?

A: Yes. Both the L0805C4R7MDMIT and LQM21PN4R7MGSD are classified as MSL 1 (Unlimited), indicating no moisture sensitivity concerns. Both components can be stored and handled without special moisture control measures.

Q: Is the Murata substitute available in equivalent packaging formats?

A: The LQM21PN4R7MGSD is supplied in Tape & Reel (TR) packaging, while the original KEMET part was available in Cut Tape (CT) & Digi-Reel format. Both packaging formats are standard for surface mount component distribution and are compatible with automated assembly equipment.