ELT-5KT4R7MB Equivalent & Substitute Parts

Part Overview

The ELT-5KT4R7MB is a 4.7 µH unshielded wirewound surface mount inductor manufactured by Panasonic Electronic Components. Rated for 950 mA continuous current with 200mOhm DC resistance, this component is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts with compatible electrical and mechanical specifications is essential for design continuity and procurement planning.

Substiute Parts

ELT-5KT4R7MB

Panasonic Electronic ComponentsIn Stock: 718ELT-5KT4R7MB Datasheet

Current PartRFQ

7447732047

Würth ElektronikIn Stock: 39737447732047 Datasheet

SimilarRFQ

P0770.472NLT

Pulse ElectronicsIn Stock: 6129P0770.472NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELT-5KT4R7MB are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 4.7 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Shielding type: Unshielded (same electromagnetic configuration)
• Wirewound construction type (same core technology)
• Surface mount packaging (same mounting methodology)
• Inductance test frequency: 100 kHz (same measurement standard)

Secondary Compatibility Parameters:

• Current rating: Equal to or greater than 950 mA
• DC resistance: Equal to or less than 200mOhm (lower DCR preferred for reduced losses)
• Operating temperature range: Suitable for intended application environment
• RoHS and MSL compliance: Maintained for regulatory and manufacturing requirements

The identified substitute parts meet or exceed the primary electrical specifications while maintaining mechanical compatibility with the original nonstandard surface mount package footprint.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain stability compared to the obsolete ELT-5KT4R7MB.

7447732047 (Würth Elektronik WE-PD2 Series): This substitute provides a 22% increase in current rating (1.16 A vs. 950 mA) and reduces DC resistance to 160mOhm maximum, representing a 20% improvement in power efficiency. ROHS3 compliance and defined operating temperature range (-40°C to 125°C) support modern manufacturing and environmental standards.

P0770.472NLT (Pulse Electronics P0770NL Series): This substitute delivers the highest current rating (1.5 A, 58% above original specification) and the lowest DC resistance (90mOhm maximum, 55% reduction). Extended operating temperature range (-40°C to 130°C) provides additional thermal margin. ROHS3 compliance and REACH unaffected status confirm regulatory alignment.

Both substitutes maintain identical inductance values, tolerance bands, shielding configuration, and test frequency specifications. Selection between them depends on thermal performance requirements and available board space, as physical dimensions vary between the three parts.

Frequently Asked Questions (FAQ)

Q: Can the 7447732047 or P0770.472NLT be used as direct replacements for the ELT-5KT4R7MB?

A: Yes, both parts are electrically compatible substitutes. They maintain the same 4.7 µH inductance value, ±20% tolerance, unshielded wirewound construction, and 100 kHz test frequency. Both exceed the original 950 mA current rating and provide equal or superior DC resistance performance. Surface mount mounting type is identical across all three parts.

Q: What are the physical dimension differences between these parts?

A: The ELT-5KT4R7MB measures 0.228" L × 0.205" W × 0.047" H (5.80mm × 5.20mm × 1.20mm). The 7447732047 is smaller at 0.138" L × 0.118" W × 0.094" H (4.60mm × 3.00mm × 2.40mm). The P0770.472NLT is larger at 0.260" L × 0.175" W × 0.115" H (6.60mm × 4.45mm × 2.92mm). Board layout compatibility must be verified before selection.

Q: Are there compliance or regulatory differences between the substitute parts?

A: All three parts are RoHS compliant. The ELT-5KT4R7MB carries RoHS Compliant status, while both substitutes meet ROHS3 Compliant standards, representing updated regulatory alignment. The P0770.472NLT additionally specifies REACH Unaffected status. Moisture Sensitivity Level 1 (Unlimited) is consistent across all parts.

Q: Which substitute offers the best thermal performance?

A: The P0770.472NLT provides the lowest DC resistance at 90mOhm maximum, resulting in the least power dissipation. The 7447732047 offers intermediate performance at 160mOhm maximum. Lower DC resistance reduces heat generation in current-carrying applications.

Q: What is the saturation current specification for these inductors?

A: The 7447732047 specifies saturation current (Isat) at 1.77 A. The P0770.472NLT specifies saturation current at 1.5 A. The original ELT-5KT4R7MB does not provide saturation current data. Saturation current defines the maximum current before inductance degradation occurs.