ELJ-SA151KF Equivalent & Substitute Parts

Part Overview

The ELJ-SA151KF is a 150 µH shielded inductor manufactured by Panasonic Electronic Components, designed for surface mount applications in the 1210 (3225 Metric) package. This component is rated for 5 mA maximum current with a DC resistance of 9Ohm maximum and operates at a self-resonant frequency of 5 MHz. The part is currently obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

ELJ-SA151KF

Panasonic Electronic ComponentsIn Stock: 1198ELJ-SA151KF Datasheet

Current PartRFQ

SP1210R-154K

API Delevan Inc.In Stock: 908SP1210R-154K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-SA151KF is determined by the following critical parameters:

• Inductance Value: 150 µH (±10% tolerance)
• Package / Case: 1210 (3225 Metric) surface mount
• Shielding Type: Shielded construction
• Current Rating: Minimum 5 mA capability
• DC Resistance: Maximum 9Ohm (or lower for improved performance)
• Inductance Test Frequency: 100 kHz

The SP1210R-154K from API Delevan Inc. meets these substitution criteria with identical inductance value, package size, shielding, and test frequency. The substitute part exceeds the current rating requirement (124 mA vs. 5 mA) and maintains shielded construction suitable for the same circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The SP1210R-154K is a direct functional substitute for the obsolete ELJ-SA151KF. Both components share identical inductance specifications, package dimensions, and shielding characteristics required for equivalent circuit performance.

The SP1210R-154K offers the advantage of active product status with current manufacturing availability. The substitute part's higher current rating (124 mA) and saturation current (106 mA) provide additional design margin for applications originally specified for the 5 mA ELJ-SA151KF.

The DC resistance difference (14.6Ohm Max vs. 9Ohm Max) should be evaluated in circuits where resistive losses directly impact performance. Both parts maintain identical moisture sensitivity classification (MSL 1) and are suitable for equivalent environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the SP1210R-154K replace the ELJ-SA151KF in existing designs?

A: Yes. Both inductors share the same 150 µH inductance value, ±10% tolerance, 1210 package size, and shielded construction. The substitute part meets or exceeds all critical electrical parameters for direct substitution.

Q: What is the impact of the higher DC resistance in the SP1210R-154K?

A: The SP1210R-154K has a maximum DC resistance of 14.6Ohm compared to 9Ohm maximum for the ELJ-SA151KF. In low-current applications (5 mA), this 4.5Ohm difference results in approximately 22.5 µW additional power dissipation. Circuit analysis is required to determine if this resistive loss is acceptable for the specific application.

Q: Are the physical dimensions compatible?

A: Yes. Both parts use the 1210 (3225 Metric) package with compatible surface mount footprints. The SP1210R-154K dimensions (0.128" L x 0.095" W x 0.101" H max) are within acceptable tolerances for PCB layouts designed for the ELJ-SA151KF (0.126" L x 0.098" W x 0.094" H max).

Q: What is the difference in core construction?

A: The ELJ-SA151KF uses unspecified core material, while the SP1210R-154K employs a ferrite drum core with wirewound construction. Both maintain shielded designs suitable for EMI-sensitive applications.

Q: Is the SP1210R-154K RoHS compliant?

A: Yes. The SP1210R-154K is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.