ELJ-PA331KF 330µH Unshielded Drum Core Wirewound Inductor Equivalent & Substitute Parts

Part Overview

The ELJ-PA331KF is a 330µH unshielded drum core wirewound inductor manufactured by Panasonic Electronic Components in the PA series. This surface mount component is rated for 50mA maximum current with 16Ohm DC resistance and operates across -20°C to 85°C. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

ELJ-PA331KF

Panasonic Electronic ComponentsIn Stock: 830ELJ-PA331KF Datasheet

Current PartRFQ

B82422H1334K000

EPCOS - TDK ElectronicsIn Stock: 60083B82422H1334K000 Datasheet

DirectRFQ

B82422T1334K000

EPCOS - TDK ElectronicsIn Stock: 12619B82422T1334K000 Datasheet

DirectRFQ

NLCV32T-331K-EF

TDK CorporationIn Stock: 2490NLCV32T-331K-EF Datasheet

DirectRFQ

NLCV32T-331K-PF

TDK CorporationIn Stock: 18185NLCV32T-331K-PF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ELJ-PA331KF is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 330µH ±10%
• Package footprint: 1210 (3225 Metric) with matching physical dimensions (0.126" L × 0.098" W, 3.20mm × 2.50mm)
• Core type: Ferrite, unshielded, drum core wirewound construction
• Mounting type: Surface mount
• Test frequency: 796kHz

Secondary Compatibility Factors:

• Current rating must equal or exceed 50mA minimum
• DC resistance must be compatible with circuit requirements
• Operating temperature range must support application needs
• Moisture sensitivity level MSL 1 (Unlimited)

The four substitute parts listed (B82422H1334K000, B82422T1334K000, NLCV32T-331K-EF, NLCV32T-331K-PF) all meet the primary matching criteria. Differences in current rating, DC resistance, and operating temperature range determine suitability for specific applications.

Parameter Comparison

Engineering Selection Recommendations

B82422H1334K000 (EPCOS - TDK Electronics) This part is the preferred substitute for new designs and ongoing production. It offers active product status with AEC-Q200 automotive qualification, extended operating temperature range (-55°C to 150°C), and higher current rating (90mA) compared to the original 50mA specification. DC resistance of 13Ohm Max is lower than the original 16Ohm, providing improved efficiency. ROHS3 compliance and REACH unaffected status support regulatory requirements.

B82422T1334K000 (EPCOS - TDK Electronics) This alternative is suitable only for applications with current requirements below 40mA. The 34Ohm Max DC resistance is significantly higher than the original specification and may introduce unacceptable power dissipation in circuits designed for the 16Ohm characteristic. Active product status and AEC-Q200 qualification are available. Operating temperature range of -55°C to 125°C supports extended environmental conditions.

NLCV32T-331K-EF (TDK Corporation) This part provides active product status with 70mA current rating and 15.99Ohm Max DC resistance closely matching the original specification. Operating temperature range of -40°C to 105°C covers the original -20°C to 85°C requirement. ROHS3 compliance and REACH unaffected status are confirmed. This part is suitable for direct substitution in applications requiring the original performance envelope.

NLCV32T-331K-PF (TDK Corporation) This part carries "Not For New Designs" status and should be used only for legacy system maintenance or repair of existing equipment. While electrically equivalent to NLCV32T-331K-EF with 70mA current rating and 15.99Ohm Max DC resistance, the discontinued design status makes it unsuitable for new product development.

Frequently Asked Questions (FAQ)

Q: Can B82422T1334K000 be used as a direct replacement for ELJ-PA331KF? A: B82422T1334K000 is not recommended as a direct replacement. While the inductance and package are identical, the 34Ohm Max DC resistance is more than double the original 16Ohm specification. This higher resistance will increase power dissipation and may alter circuit performance. Use only if circuit analysis confirms compatibility with the higher DCR value and if the 40mA current rating is sufficient.

Q: What is the difference between NLCV32T-331K-EF and NLCV32T-331K-PF? A: Both parts are electrically identical with 330µH inductance, 70mA current rating, and 15.99Ohm Max DC resistance. The primary difference is product status: NLCV32T-331K-EF is active and suitable for new designs, while NLCV32T-331K-PF is marked "Not For New Designs" and should be used only for legacy system support.

Q: Is B82422H1334K000 compatible with the original ELJ-PA331KF footprint? A: Yes. Both parts use the 1210 (3225 Metric) package with identical physical dimensions (0.126" L × 0.098" W, 3.20mm × 2.50mm). PCB layout and assembly tooling require no modification. The lower DC resistance (13Ohm vs 16Ohm) and higher current rating (90mA vs 50mA) make this part suitable for direct substitution with improved performance margins.

Q: Does the higher operating temperature range of B82422H1334K000 affect circuit design? A: The extended operating temperature range (-55°C to 150°C) of B82422H1334K000 compared to the original (-20°C to 85°C) provides additional environmental margin. This does not negatively affect circuit design; it only expands the conditions under which the component remains within specification. No design changes are required.

Q: Are all substitute parts RoHS3 compliant? A: B82422H1334K000, B82422T1334K000, NLCV32T-331K-EF, and NLCV32T-331K-PF are all confirmed ROHS3 compliant. The original ELJ-PA331KF compliance status is not specified in the provided data.

Q: Which substitute part should be selected for new product designs? A: B82422H1334K000 is the recommended choice for new designs. It offers active product status, AEC-Q200 automotive qualification, extended operating temperature range, higher current rating, and lower DC resistance than the obsolete original part.