ELJ-RF1N5DFB Equivalent & Substitute Parts

Part Overview

The ELJ-RF1N5DFB is a 1.5 nH unshielded multilayer inductor manufactured by Panasonic Electronic Components, designed for surface mount applications in the 0402 (1005 Metric) package. This component is rated for 400 mA maximum current with 70mOhm DC resistance and operates across -20°C to 85°C. The product status is obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

ELJ-RF1N5DFB

Panasonic Electronic ComponentsIn Stock: 928ELJ-RF1N5DFB Datasheet

Current PartRFQ

MLG1005S1N5STD25

TDK CorporationIn Stock: 15569MLG1005S1N5STD25 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-RF1N5DFB is determined by the following critical parameters:

• Inductance Value: Must be 1.5 nH with tolerance ±0.3nH
• Package / Case: Must be 0402 (1005 Metric) for mechanical and electrical compatibility
• Type: Must be multilayer construction
• Shielding: Must be unshielded
• Current Rating: Must meet or exceed 400 mA requirement
• DC Resistance: Must not exceed 70mOhm maximum specification

The MLG1005S1N5STD25 from TDK Corporation meets all substitution criteria. While it provides higher current rating (1 A versus 400 mA) and slightly higher DCR (100mOhm versus 70mOhm), these parameters remain within acceptable operational boundaries for equivalent functionality in the same package footprint.

Parameter Comparison

Engineering Selection Recommendations

The MLG1005S1N5STD25 is the qualified substitute for the obsolete ELJ-RF1N5DFB. Selection is supported by the following factors:

• Product Status: The substitute is active production status, ensuring long-term availability and supply chain stability compared to the obsolete original part.
• Compliance: Both parts maintain REACH Unaffected and EAR99 ECCN classifications. The substitute carries AEC-Q200 automotive qualification, providing additional reliability assurance.
• Electrical Equivalence: Identical inductance value and tolerance with superior current rating capability (1 A versus 400 mA) and extended operating temperature range (-55°C to 125°C versus -20°C to 85°C).
• Mechanical Compatibility: Identical package footprint, dimensions, and mounting type ensure direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can MLG1005S1N5STD25 be used as a direct replacement for ELJ-RF1N5DFB?

A: Yes. Both components share identical inductance value (1.5 nH ±0.3nH), package (0402 Metric), and core type (non-magnetic multilayer). The substitute meets or exceeds all electrical specifications of the original part.

Q: What is the difference in DC resistance between these parts?

A: The ELJ-RF1N5DFB specifies 70mOhm maximum DCR, while the MLG1005S1N5STD25 specifies 100mOhm maximum. This 30mOhm difference is acceptable for RF inductor applications at these inductance values and does not impact functional performance in typical circuit configurations.

Q: Does the higher current rating of the substitute affect compatibility?

A: No. The MLG1005S1N5STD25 is rated for 1 A maximum current, exceeding the original 400 mA specification. Higher current rating provides additional design margin and does not create compatibility issues.

Q: Are there packaging differences between these parts?

A: Both parts are supplied in 0402 (1005 Metric) surface mount packages with identical physical dimensions (1.00mm L x 0.50mm W x 0.55mm H maximum). The substitute is available in Tape & Reel packaging, while the original was specified with standard packaging notation.

Q: What is the temperature operating range difference?

A: The ELJ-RF1N5DFB operates -20°C to 85°C, while the MLG1005S1N5STD25 operates -55°C to 125°C. The substitute provides extended temperature capability suitable for broader environmental applications.

Q: Is AEC-Q200 qualification relevant for this substitution?

A: AEC-Q200 qualification on the MLG1005S1N5STD25 indicates automotive-grade reliability testing. This certification is beneficial for applications requiring enhanced reliability assurance, though not mandatory for direct electrical substitution.