ELJ-SC330KF Equivalent & Substitute Parts

Part Overview

The ELJ-SC330KF is a 33 µH shielded inductor manufactured by Panasonic Electronic Components, rated for 14 mA maximum current with 5.2Ohm DC resistance. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The shielded construction and specific electrical characteristics define the substitution parameters for this product category.

Substiute Parts

ELJ-SC330KF

Panasonic Electronic ComponentsIn Stock: 1039ELJ-SC330KF Datasheet

Current PartRFQ

NLV25T-330J-PF

TDK CorporationIn Stock: 7056NLV25T-330J-PF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-SC330KF is evaluated based on the following critical parameters:

Primary Matching Criteria:

• Inductance value: 33 µH (exact match required)
• Package / Case: 1008 (2520 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Frequency - Self Resonant: within acceptable operating range

Secondary Compatibility Factors:

• Current Rating: substitute must meet or exceed 14 mA minimum
• DC Resistance: substitute DCR must be compatible with circuit design requirements
• Shielding: shielded construction preferred for EMI-sensitive applications
• Tolerance: ±10% or tighter acceptable

The identified substitute NLV25T-330J-PF matches the primary criteria of inductance value, package, and mounting type. However, differences in shielding, current rating, and DC resistance must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The NLV25T-330J-PF from TDK Corporation is electrically compatible with the ELJ-SC330KF for applications where the following conditions are met:

Compatibility Conditions:

• Circuit current requirements do not exceed 110 mA (substitute provides 7.86x higher current rating than original)
• EMI shielding is not a critical design requirement, or external shielding measures are implemented
• DC resistance increase from 5.2Ohm to 7.1Ohm maximum does not adversely affect circuit performance
• Operating temperature range of -40°C to 105°C is acceptable for the application
• RoHS3 compliance is required or beneficial for the end product

Product Status Consideration: Both the original ELJ-SC330KF (Obsolete) and substitute NLV25T-330J-PF (Not For New Designs) carry discontinued or restricted status. For new design implementations, alternative current-generation inductors with identical electrical specifications should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-330J-PF directly replace the ELJ-SC330KF in existing designs?

A: Direct replacement is possible if the application does not depend on shielded construction for EMI control and if the increased DC resistance (7.1Ohm vs 5.2Ohm) does not degrade circuit performance. The higher current rating of the substitute (110 mA vs 14 mA) provides design margin for current-limited applications.

Q: What is the impact of the shielding difference?

A: The ELJ-SC330KF features shielded construction, while the NLV25T-330J-PF is unshielded. In applications sensitive to electromagnetic interference, the unshielded substitute may introduce coupling effects. Circuit-level shielding or layout modifications may be required.

Q: Are the physical dimensions compatible?

A: Both inductors use the 1008 (2520 Metric) package with identical length and width (0.098" x 0.079"). The height difference is minimal (0.071" vs 0.075"), presenting no practical PCB layout constraints for standard surface mount assembly.

Q: What compliance certifications apply to the substitute?

A: The NLV25T-330J-PF is RoHS3 compliant and REACH affected. The original ELJ-SC330KF compliance status is not specified in available documentation.

Q: Why does the substitute have lower Q factor?

A: The NLV25T-330J-PF exhibits Q of 25 @ 2.52MHz compared to 40 @ 2.52MHz for the original. This reflects differences in core material (ferrite drum core vs shielded construction) and construction method. For frequency-dependent applications, this difference may affect circuit performance.