ELL-CTV391M Equivalent & Substitute Parts

Part Overview

The ELL-CTV391M is a 390 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. Designed for surface mount applications, this component operates at 630 mA with a DC resistance of 560mOhm and is rated for 100 kHz inductance testing. The part carries an Obsolete product status, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

ELL-CTV391M

Panasonic Electronic ComponentsIn Stock: 1107ELL-CTV391M Datasheet

Current PartRFQ

SRR1260-391K

Bourns Inc.In Stock: 1773SRR1260-391K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELL-CTV391M is determined by the following critical parameters:

• Inductance Value: Must be 390 µH at 100 kHz test frequency
• Core Material & Shielding: Ferrite material with shielded construction required
• Mounting Type: Surface mount configuration mandatory
• Current Handling: Minimum 630 mA rating required
• DC Resistance: Must not exceed design limits for thermal and efficiency considerations
• Physical Dimensions: Nonstandard package; dimensional compatibility within acceptable tolerances
• Compliance: ROHS3 compliance and MSL 1 rating required

The SRR1260-391K from Bourns Inc. qualifies as a substitute based on matching inductance value, core material, shielding type, surface mount configuration, and compliance certifications. The substitute provides enhanced current rating (1.08 A vs. 630 mA) and improved inductance tolerance (±10% vs. ±20%), supporting broader application flexibility.

Parameter Comparison

Engineering Selection Recommendations

The SRR1260-391K is qualified as a direct substitute for the obsolete ELL-CTV391M based on the following engineering criteria:

Functional Equivalence: Both components provide 390 µH inductance at 100 kHz with ferrite shielded drum core construction and surface mount configuration.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

Active Product Status: The SRR1260-391K carries Active product status, providing assured long-term availability and supply chain continuity compared to the Obsolete ELL-CTV391M.

Performance Enhancement: The substitute offers improved inductance tolerance (±10% vs. ±20%) and higher current rating (1.08 A vs. 630 mA), providing design margin for thermal and electrical performance.

Physical Considerations: The SRR1260-391K exhibits slightly larger footprint dimensions (12.50mm x 12.50mm vs. 12.00mm x 12.00mm) and greater seated height (6.50mm vs. 4.50mm). PCB layout verification is required to confirm spatial compatibility within existing designs.

DC Resistance Trade-off: The substitute exhibits higher maximum DC resistance (700mOhm vs. 560mOhm). Applications sensitive to resistive losses require thermal analysis to confirm acceptable performance.

Frequently Asked Questions (FAQ)

Q: Can the SRR1260-391K directly replace the ELL-CTV391M without circuit modification?

A: Functional substitution is supported based on matching inductance value, core material, and shielding type. However, physical dimensions differ: the SRR1260-391K is 0.50mm larger in footprint and 2.00mm taller. PCB layout and component clearance must be verified before implementation.

Q: What is the impact of the higher DC resistance in the SRR1260-391K?

A: The SRR1260-391K specifies 700mOhm maximum DCR compared to 560mOhm for the ELL-CTV391M. This 140mOhm difference increases resistive losses and heat generation. Applications operating at or near the 630 mA current limit require thermal analysis to confirm acceptable operating conditions.

Q: Why does the SRR1260-391K have a higher current rating?

A: The SRR1260-391K is rated for 1.08 A continuous current with 1 A saturation current, compared to 630 mA for the ELL-CTV391M. This enhanced rating reflects improved core design and thermal management in the Bourns component, providing additional design margin for current-limited applications.

Q: Are there packaging differences between these components?

A: The ELL-CTV391M is supplied in nonstandard packaging. The SRR1260-391K is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes and provides improved handling and storage characteristics.

Q: What compliance certifications apply to both components?

A: Both the ELL-CTV391M and SRR1260-391K are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. The SRR1260-391K additionally carries REACH Unaffected status. Both components are classified under ECCN EAR99 for export control purposes.

Q: Is the inductance tolerance difference significant for circuit design?

A: The SRR1260-391K provides ±10% inductance tolerance compared to ±20% for the ELL-CTV391M. This tighter tolerance reduces component variation and may improve circuit performance consistency, particularly in frequency-dependent applications.