ELJ-SC470KF Equivalent & Substitute Parts

Part Overview

The ELJ-SC470KF is a 47 µH shielded inductor manufactured by Panasonic Electronic Components, rated for 12 mA maximum current with 6.6Ohm DC resistance. This component is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. The part is housed in a 1008 (2520 Metric) surface mount package with shielded construction suitable for noise-sensitive applications.

Substiute Parts

ELJ-SC470KF

Panasonic Electronic ComponentsIn Stock: 1169ELJ-SC470KF Datasheet

Current PartRFQ

NLV25T-470J-PF

TDK CorporationIn Stock: 3695NLV25T-470J-PF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELJ-SC470KF is evaluated based on the following critical parameters:

• Inductance Value: 47 µH (primary functional requirement)
• Package / Case: 1008 (2520 Metric) (physical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Current Rating: Minimum 12 mA (electrical performance requirement)
• DC Resistance: Acceptable range for circuit operation
• Shielding: Shielded construction (electromagnetic compatibility consideration)

The substitute part NLV25T-470J-PF matches the inductance value, package, and mounting type. However, it differs in shielding configuration (unshielded), current rating (80 mA), and DC resistance (11.1Ohm Max). These differences must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The NLV25T-470J-PF presents a viable substitute for the obsolete ELJ-SC470KF based on matching inductance value and package compatibility. The following factors support this substitution:

• Both components share identical inductance (47 µH) and package dimensions (1008 / 2520 Metric)
• The NLV25T-470J-PF offers superior current rating (80 mA vs. 12 mA), providing design margin
• The substitute exhibits tighter inductance tolerance (±5% vs. ±10%), improving circuit predictability
• RoHS3 compliance of the substitute aligns with modern manufacturing standards
• Defined operating temperature range (-40°C ~ 105°C) for the substitute provides explicit thermal specification

Considerations for substitution:

• The NLV25T-470J-PF is unshielded, whereas the original is shielded. Applications requiring electromagnetic isolation must evaluate this difference
• DC resistance is higher (11.1Ohm Max vs. 6.6Ohm Max), affecting power dissipation and circuit behavior
• Quality factor (Q) is lower at 2.52MHz (20 vs. 40), impacting frequency response characteristics
• Physical height difference (1.90mm vs. 1.80mm) is minimal but must be verified for PCB clearance

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-470J-PF directly replace the ELJ-SC470KF in all applications?

A: Direct replacement is possible for circuits where shielding is not critical and the higher DC resistance (11.1Ohm vs. 6.6Ohm) does not compromise performance. Applications requiring shielded construction or operating at the 12 mA current limit require detailed circuit analysis.

Q: What is the impact of the unshielded design of the NLV25T-470J-PF?

A: Unshielded inductors generate external magnetic fields that may couple into adjacent circuit traces or components. If the original design relied on shielding for noise immunity or EMI compliance, the substitute may require additional circuit-level mitigation.

Q: Are there compatibility concerns with the physical dimensions?

A: Both parts use the 1008 (2520 Metric) package with identical length and width (0.098" x 0.079"). The height difference (0.075" vs. 0.071") is 0.004" (0.10mm) and typically does not affect PCB layout or assembly.

Q: How do the tolerance specifications affect circuit design?

A: The ELJ-SC470KF has ±10% tolerance, while the NLV25T-470J-PF has ±5% tolerance. The tighter tolerance of the substitute reduces inductance variation across production batches, improving circuit consistency.

Q: What is the significance of the product status difference?

A: The ELJ-SC470KF is marked Obsolete, indicating discontinued production. The NLV25T-470J-PF is marked Not For New Designs, indicating limited availability but potential for legacy support. Neither status guarantees long-term supply.

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

A: The NLV25T-470J-PF is rated for 80 mA versus 12 mA for the original. Higher current rating does not create incompatibility; it provides additional design margin and reduces saturation risk in the substitute component.