ELL-6RH390M Equivalent & Substitute Parts

Part Overview

The ELL-6RH390M is a 39 µH shielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 550 mA with a DC resistance of 410mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part is surface mount, nonstandard package, and RoHS3 compliant with MSL 1 rating.

Substiute Parts

ELL-6RH390M

Panasonic Electronic ComponentsIn Stock: 1079ELL-6RH390M Datasheet

Current PartRFQ

CDRH62BNP-390MC-B

Sumida America Components Inc.In Stock: 1049CDRH62BNP-390MC-B Datasheet

SimilarRFQ

SRR5028-390Y

Bourns Inc.In Stock: 2077SRR5028-390Y Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELL-6RH390M are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value: 39 µH (exact match required)
• Shielding: Shielded construction
• Mounting: Surface mount
• Tolerance: ±20% or tighter
• Current rating: Equal to or greater than 550 mA
• DC resistance: Within acceptable operating range for the application
• RoHS3 compliance and MSL 1 rating

Substitute Parts Identified:

1. CDRH62BNP-390MC-B (Sumida America Components Inc.) – Active status, ferrite core, 540 mA rating, 490mOhm DCR
2. SRR5028-390Y (Bourns Inc.) – Active status, ferrite drum core wirewound, 860 mA rating, 210mOhm DCR

Both substitutes maintain the 39 µH inductance specification, shielded construction, surface mount configuration, and RoHS3 compliance required for direct replacement consideration.

Parameter Comparison

Engineering Selection Recommendations

CDRH62BNP-390MC-B (Sumida America Components Inc.)

This substitute maintains electrical equivalence with a current rating of 540 mA, which is marginally below the original 550 mA specification. The DC resistance of 490mOhm is slightly elevated compared to the 410mOhm original. The part is active status with full RoHS3 compliance and MSL 1 rating. Physical dimensions are slightly larger (6.60mm x 6.20mm vs. 6.40mm x 6.00mm), requiring PCB layout verification. Operating temperature range is -40°C to 100°C.

SRR5028-390Y (Bourns Inc.)

This substitute provides superior electrical performance with a current rating of 860 mA and significantly lower DC resistance of 210mOhm, offering improved thermal characteristics. The inductance tolerance is ±30%, which is wider than the original ±20%. The part is active status with full RoHS3 compliance and MSL 1 rating. Physical dimensions are smaller (5.80mm x 5.80mm), which may provide PCB layout advantages. Operating temperature range extends to -40°C to 125°C, providing broader thermal operating margin. Additional performance data includes Q factor of 8 @ 2.52MHz and self-resonant frequency of 13MHz.

Both substitutes are qualified for direct replacement based on inductance value, shielding, surface mount configuration, and compliance certifications. Selection between them depends on specific application requirements regarding current margin, thermal performance, and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can CDRH62BNP-390MC-B be used as a direct replacement for ELL-6RH390M?

A: Yes, with consideration for the 540 mA current rating versus the original 550 mA specification. If the application operates at or near 550 mA, the reduced margin requires thermal analysis. The slightly higher DC resistance (490mOhm vs. 410mOhm) will result in marginally increased power dissipation.

Q: Can SRR5028-390Y be used as a direct replacement for ELL-6RH390M?

A: Yes. The SRR5028-390Y provides superior electrical performance with higher current rating (860 mA) and lower DC resistance (210mOhm). The wider inductance tolerance (±30% vs. ±20%) must be evaluated against circuit requirements. Physical dimensions are smaller, which may require PCB layout adjustment.

Q: What are the key differences in DC resistance between these parts?

A: ELL-6RH390M: 410mOhm; CDRH62BNP-390MC-B: 490mOhm Max; SRR5028-390Y: 210mOhm Max. Lower DC resistance reduces power dissipation and heat generation. The SRR5028-390Y offers the lowest resistance, resulting in improved thermal performance.

Q: Are there physical footprint compatibility concerns?

A: Yes. The ELL-6RH390M measures 6.40mm x 6.00mm with 2.80mm height. CDRH62BNP-390MC-B is slightly larger at 6.60mm x 6.20mm with 3.00mm height. SRR5028-390Y is smaller at 5.80mm x 5.80mm with 3.00mm height. PCB layout verification is required for each substitute.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant with MSL 1 (Unlimited) rating, ensuring equivalent environmental and moisture sensitivity compliance.

Q: What is the inductance tolerance difference impact?

A: ELL-6RH390M and CDRH62BNP-390MC-B both specify ±20% tolerance. SRR5028-390Y specifies ±30% tolerance. For circuits requiring tighter inductance control, the ±20% parts are preferred. For applications with wider tolerance margins, the ±30% specification is acceptable.

Q: Which substitute offers the best thermal performance?

A: SRR5028-390Y provides the lowest DC resistance (210mOhm Max) and highest current rating (860 mA), resulting in the lowest power dissipation and best thermal characteristics. It also supports the widest operating temperature range (-40°C to 125°C).