ELL-CTV4R7N Equivalent & Substitute Parts

Part Overview

The ELL-CTV4R7N is a 4.7 µH shielded drum core wirewound inductor manufactured by Panasonic Electronic Components, rated for 5.2 A continuous current with 9.9mOhm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates in surface mount configuration with nonstandard packaging and ferrite core construction.

Substiute Parts

ELL-CTV4R7N

Panasonic Electronic ComponentsIn Stock: 816ELL-CTV4R7N Datasheet

Current PartRFQ

744771004

Würth ElektronikIn Stock: 9196744771004 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-CTV4R7N is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 4.7 µH (exact match required)
• Core construction: Ferrite, shielded drum core (same topology)
• Mounting type: Surface mount (same form factor class)
• Physical footprint: 12.00mm x 12.00mm base dimensions (same PCB placement)

Secondary Compatibility Factors:

• Current rating: Substitute must equal or exceed 5.2 A minimum
• DC resistance: Substitute must not exceed 9.9mOhm significantly (thermal and efficiency impact)
• Shielding: Shielded construction maintained for EMI performance
• RoHS compliance: ROHS3 status maintained

The Würth Elektronik 744771004 meets all primary matching criteria with enhanced electrical performance in current handling and reduced DC resistance tolerance specification.

Parameter Comparison

Engineering Selection Recommendations

The Würth Elektronik 744771004 is the qualified substitute for the obsolete ELL-CTV4R7N based on the following engineering factors:

Functional Equivalence: Both components maintain identical 4.7 µH inductance with ferrite shielded drum core construction and surface mount configuration on matching 12.00mm x 12.00mm footprints.

Performance Enhancement: The 744771004 provides superior current handling capacity (8.25 A vs. 5.2 A) and tighter inductance tolerance (±20% vs. ±30%), supporting higher power density applications without derating.

Compliance Status: Both parts maintain ROHS3 compliance. The 744771004 carries AEC-Q200 automotive qualification and REACH unaffected status, providing additional supply chain assurance for regulated applications.

Active Production: The 744771004 is in active production with 9146 units in stock, ensuring long-term availability compared to the obsolete ELL-CTV4R7N status.

Height Consideration: The 744771004 seated height is 6.00mm versus 4.50mm for the original part. PCB layout clearance must be verified for applications with vertical space constraints.

Frequently Asked Questions (FAQ)

Q: Can the 744771004 directly replace the ELL-CTV4R7N without circuit modification?

A: Yes, for applications operating at or below 5.2 A. The identical inductance value, core type, and footprint dimensions ensure direct PCB compatibility. Verify clearance for the increased 6.00mm height. No circuit redesign is required.

Q: What is the impact of the 2mOhm higher DC resistance in the 744771004?

A: The 744771004 specifies 11mOhm maximum versus 9.9mOhm for the original part. This 1.1mOhm difference produces minimal thermal impact in most applications. Power dissipation increase is proportional to I²R; at 5.2 A, the additional loss is approximately 0.06 mW, negligible in typical power supply designs.

Q: Why does the 744771004 have a tighter inductance tolerance?

A: The ±20% tolerance specification reflects Würth Elektronik's manufacturing process capability. This tighter tolerance reduces circuit tuning variation and improves performance consistency across production batches.

Q: Is the increased current rating of 8.25 A a concern for existing designs?

A: No. Higher current rating indicates greater thermal margin and saturation headroom. Existing designs operating at 5.2 A or below will experience improved reliability and reduced thermal stress with the 744771004.

Q: What packaging format is the 744771004 supplied in?

A: Tape & Reel (TR) format for automated assembly. Confirm your production equipment compatibility with standard SMD tape specifications.

Q: Are there any frequency response differences between these parts?

A: The 744771004 specifies 35 MHz self-resonant frequency and 1 kHz inductance test frequency. The original part does not specify these parameters. For applications requiring specific frequency response characteristics, these values should be evaluated against circuit requirements.