ELJ-PC330KF Equivalent & Substitute Parts

Part Overview

The ELJ-PC330KF is a 33 µH unshielded wirewound inductor manufactured by Panasonic Electronic Components, rated for 120 mA maximum current with 6.5Ohm DC resistance. This component is designed for surface mount applications in the 1008 (2520 Metric) package format. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.

Substiute Parts

ELJ-PC330KF

Panasonic Electronic ComponentsIn Stock: 1081ELJ-PC330KF Datasheet

Current PartRFQ

NLV25T-330J-PF

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-PC330KF is determined by the following critical parameters:

• Inductance Value: Must be 33 µH (tolerance variations acceptable within design margin)
• Package / Case: Must be 1008 (2520 Metric) for mechanical and electrical compatibility
• Mounting Type: Must be Surface Mount
• Current Rating: Must support minimum 120 mA operation
• DC Resistance: Must not exceed design limits for the application circuit
• Shielding Configuration: Unshielded specification must be maintained
• Operating Temperature Range: Must encompass the required thermal envelope

The TDK Corporation NLV25T-330J-PF meets these core substitution criteria, maintaining identical inductance, package format, and mounting configuration while providing comparable electrical performance within acceptable parameter ranges.

Parameter Comparison

Engineering Selection Recommendations

The NLV25T-330J-PF from TDK Corporation is a direct functional substitute for the obsolete ELJ-PC330KF. Both components share identical inductance values, package dimensions, and mounting specifications required for PCB-level compatibility.

The TDK substitute offers improved tolerance (±5% versus ±10%), superior quality factor (25 versus 20 @ 2.52MHz), and extended operating temperature range (-40°C ~ 105°C versus -20°C ~ 85°C). The TDK part carries RoHS3 compliance and REACH affected status, meeting current regulatory requirements for new designs.

Current rating differential (110 mA versus 120 mA) and DC resistance increase (7.1Ohm versus 6.5Ohm) must be evaluated against specific circuit requirements. Applications operating at or near the 120 mA maximum rating of the original part require circuit-level analysis to confirm the 10 mA reduction is acceptable. The 0.6Ohm DCR increase represents approximately 9.2% higher resistance and should be assessed for thermal and efficiency impact in power-sensitive applications.

Physical height difference (1.90mm versus 1.80mm) is minimal and typically accommodates standard PCB assembly processes without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-330J-PF be used as a direct drop-in replacement for the ELJ-PC330KF?

A: Yes, for applications where the 110 mA current rating and 7.1Ohm DCR are within acceptable design margins. The identical package format (1008 / 2520 Metric) and mounting type enable direct PCB substitution. Circuit-level validation is required for current-critical applications.

Q: What is the impact of the tolerance difference (±5% versus ±10%)?

A: The TDK substitute provides tighter inductance tolerance, reducing circuit performance variation. This is beneficial for applications sensitive to inductance accuracy and does not create compatibility issues.

Q: Are there thermal considerations for the height difference?

A: The 0.4mm height increase (1.80mm to 1.90mm) is within standard PCB assembly tolerances and does not typically affect thermal performance or clearance in standard designs.

Q: Does the higher DC resistance affect circuit performance?

A: The 0.6Ohm increase in DCR results in approximately 9.2% higher resistive losses. In low-current applications, this impact is minimal. High-current or efficiency-critical circuits require thermal and power loss recalculation.

Q: What compliance advantages does the TDK part offer?

A: The NLV25T-330J-PF is RoHS3 compliant and REACH affected, meeting current environmental and regulatory standards. The original Panasonic part carries no specified compliance status.

Q: Is the extended operating temperature range of the TDK part beneficial?

A: The TDK part operates from -40°C to 105°C versus -20°C to 85°C for the original. This extended range provides design flexibility for applications in wider thermal environments without requiring alternative components.