ELJ-NDR82KF Equivalent & Substitute Parts

Part Overview

The Panasonic ELJ-NDR82KF is an 820 nH unshielded wirewound inductor rated for 125 mA with a maximum DC resistance of 3.38 Ohm in 0805 (2012 Metric) surface mount package. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The ND series inductors are commonly used in RF filtering, impedance matching, and signal conditioning applications where precise inductance values and low current ratings are required.

Substiute Parts

ELJ-NDR82KF

Panasonic Electronic ComponentsIn Stock: 997ELJ-NDR82KF Datasheet

Current PartRFQ

744760282C

Würth ElektronikIn Stock: 9042744760282C Datasheet

DirectRFQ

B82498F3821J000

EPCOS - TDK ElectronicsIn Stock: 16014B82498F3821J000 Datasheet

SimilarRFQ

LRW0805FKR82GV001E

Johanson Technology Inc.In Stock: 800LRW0805FKR82GV001E Datasheet

SimilarRFQ

MLF2012DR82KT000

TDK CorporationIn Stock: 2260MLF2012DR82KT000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ELJ-NDR82KF are selected based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 820 nH (exact match required)
• Inductance tolerance: ±10% or better
• Current rating: minimum 125 mA
• Package / Case: 0805 (2012 Metric) or compatible footprint
• Mounting type: Surface Mount
• Operating temperature range: must encompass -20°C to 85°C minimum

Secondary Considerations:

• DC resistance: lower values improve efficiency but must not exceed application limits
• Shielding: unshielded preferred for compatibility; shielded variants acceptable if footprint-compatible
• Product status: active status preferred for long-term availability

Four substitute parts meet these criteria with varying performance characteristics and availability profiles.

Parameter Comparison

Engineering Selection Recommendations

MLF2012DR82KT000 (TDK Corporation) is the primary recommended substitute. This part is active status with ROHS3 compliance, operates across -55°C to 125°C, and features the lowest DC resistance at 650 mOhm maximum. The shielded multilayer construction provides superior EMI performance compared to the original wirewound design. Physical dimensions match the 0805 (2012 Metric) standard exactly. Current rating of 150 mA exceeds the 125 mA requirement with adequate margin.

B82498F3821J000 (EPCOS - TDK Electronics) provides the second-best option with active status, ROHS3 compliance, and the lowest DC resistance at 1.9 Ohm maximum among unshielded alternatives. Operating temperature range extends to -55°C to 125°C. Current rating of 180 mA provides headroom above the 125 mA requirement. AEC-Q200 rating indicates automotive-grade qualification.

LRW0805FKR82GV001E (Johanson Technology Inc.) offers the highest current rating at 300 mA with 1.5 Ohm maximum DC resistance. Standard 0805 (2012 Metric) package ensures direct footprint compatibility. Active status and ROHS3 compliance support long-term availability. Operating temperature range of -40°C to 85°C meets the original specification minimum.

744760282C (Würth Elektronik) is suitable where extended temperature operation to -40°C to 125°C is required. Current rating of 180 mA and ±5% tolerance provide improved performance margins. Nonstandard package designation requires verification of physical compatibility despite 0805 supplier package designation.

Frequently Asked Questions (FAQ)

Q: Can MLF2012DR82KT000 replace ELJ-NDR82KF directly despite shielding differences?

A: Yes. The shielded multilayer construction of MLF2012DR82KT000 provides equivalent or superior performance in most applications. Shielding reduces EMI coupling and improves circuit stability. Physical dimensions, inductance value, tolerance, and current rating all match or exceed original specifications. Verify circuit layout compatibility if EMI characteristics are critical to application performance.

Q: What is the significance of DC resistance differences among substitutes?

A: DC resistance directly affects power dissipation and insertion loss. Lower DC resistance reduces heat generation and improves efficiency. MLF2012DR82KT000 at 650 mOhm provides the lowest loss. B82498F3821J000 at 1.9 Ohm and LRW0805FKR82GV001E at 1.5 Ohm offer intermediate performance. ELJ-NDR82KF at 3.38 Ohm represents the highest loss. Select based on thermal budget and signal integrity requirements.

Q: Are all substitutes compatible with 0805 (2012 Metric) PCB footprints?

A: MLF2012DR82KT000, LRW0805FKR82GV001E, and ELJ-NDR82KF use standard 0805 (2012 Metric) packages with identical 2.00mm × 1.25mm dimensions. 744760282C and B82498F3821J000 are designated as nonstandard packages but use 0805 supplier packages with slightly larger dimensions (2.29mm × 1.70mm and 2.30mm × 1.70mm respectively). Verify PCB layout clearances before substitution.

Q: Which substitute offers the best long-term availability?

A: B82498F3821J000 has the highest current inventory at 15,918 pieces. MLF2012DR82KT000 maintains 2,200 pieces. Both manufacturers (EPCOS-TDK and TDK Corporation) are major suppliers with active product status, ensuring continued availability. 744760282C and LRW0805FKR82GV001E have lower inventory levels but remain active products.

Q: Do all substitutes meet RoHS and REACH compliance?

A: All four substitute parts are ROHS3 compliant and REACH unaffected. The original ELJ-NDR82KF compliance status is not specified. Substitutes ensure regulatory compliance for new designs and production.

Q: What is the impact of tolerance differences (±10% vs ±5%)?

A: ±5% tolerance provides tighter inductance control compared to ±10%. B82498F3821J000 and 744760282C offer ±5% tolerance, reducing circuit tuning variation. MLF2012DR82KT000, LRW0805FKR82GV001E, and ELJ-NDR82KF maintain ±10% tolerance. Select based on circuit sensitivity to inductance variation and tuning requirements.