N08DPA331K Equivalent & Substitute Parts

Part Overview

The N08DPA331K is a 330 µH unshielded inductor manufactured by Taiyo Yuden, rated for 590 mA with a maximum DC resistance of 1.1Ohm. This surface mount component operates across a temperature range of -25°C to 85°C and features a self-resonant frequency of 3.2MHz. The product is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

N08DPA331K

Taiyo YudenIn Stock: 1175N08DPA331K Datasheet

Current PartRFQ

B82464A4334K000

EPCOS - TDK ElectronicsIn Stock: 1345B82464A4334K000 Datasheet

SimilarRFQ

SRR1205-331KL

Bourns Inc.In Stock: 752SRR1205-331KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the N08DPA331K is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value of 330 µH with ±10% tolerance
• Surface mount configuration
• Current rating capability of 540 mA minimum
• DC resistance within acceptable operating limits
• Nonstandard package classification

Substitution Logic: The identified substitute parts maintain the core inductance specification and surface mount form factor. Variations in shielding configuration, core material composition, and DC resistance are permissible within the constraints of circuit design requirements. Current rating deviations below the original specification require circuit-level evaluation. Temperature range differences are acceptable provided the operating environment remains within the substitute part's rated limits.

Parameter Comparison

Engineering Selection Recommendations

B82464A4334K000 (EPCOS - TDK Electronics): This substitute maintains the unshielded configuration of the original N08DPA331K. The part is active in production with ROHS3 compliance and AEC-Q200 automotive qualification. Current rating of 580 mA is within 1.7% of the original specification. DC resistance of 1Ohm Max provides improved performance relative to the 1.1Ohm maximum of the original part. Extended operating temperature range (-55°C to 150°C) accommodates broader environmental conditions. Footprint dimensions are comparable, with reduced height (4.80mm vs. 6.00mm). Self-resonant frequency of 100kHz differs significantly from the original 3.2MHz specification.

SRR1205-331KL (Bourns Inc.): This substitute introduces shielding, differentiating it from the unshielded original design. The part is active in production with ROHS3 compliance. Current rating of 540 mA represents a 8.5% reduction from the original 590 mA specification. DC resistance of 1.34Ohm Max exceeds the original 1.1Ohm maximum by 21.8%. Operating temperature range of -40°C to 125°C is narrower than the EPCOS alternative but broader than the original. Footprint dimensions are larger (12.70mm x 12.70mm), requiring PCB layout verification. Self-resonant frequency of 2MHz is closer to the original 3.2MHz specification than the EPCOS alternative.

Frequently Asked Questions (FAQ)

Q: Can the B82464A4334K000 directly replace the N08DPA331K in all applications?

A: The B82464A4334K000 maintains electrical compatibility for inductance, tolerance, and current rating specifications. The unshielded configuration matches the original design. However, the significantly lower self-resonant frequency (100kHz vs. 3.2MHz) may affect high-frequency circuit performance. Circuit-level validation is required for applications operating near or above 100kHz.

Q: What are the implications of the SRR1205-331KL shielding for circuit design?

A: The shielded configuration of the SRR1205-331KL reduces electromagnetic interference coupling compared to the unshielded original. This characteristic is beneficial in noise-sensitive applications but may alter circuit impedance characteristics. The shielding does not affect DC inductance value or tolerance specifications.

Q: How does the current rating reduction in the SRR1205-331KL affect component selection?

A: The SRR1205-331KL current rating of 540 mA is 8.5% lower than the original 590 mA specification. For applications operating at or near the original 590 mA rating, this substitute requires thermal and saturation margin verification. The saturation current of 880mA provides adequate headroom for transient conditions.

Q: Are there PCB layout considerations when substituting these parts?

A: Yes. The B82464A4334K000 has a smaller footprint (10.40mm x 10.40mm) and reduced height (4.80mm) compared to the original (10.60mm x 9.00mm x 6.00mm). The SRR1205-331KL has a larger footprint (12.70mm x 12.70mm). PCB layout modifications may be necessary to accommodate dimensional differences.

Q: What is the significance of the different self-resonant frequencies?

A: Self-resonant frequency determines the upper frequency limit for inductor operation. The original N08DPA331K operates to 3.2MHz, the SRR1205-331KL to 2MHz, and the B82464A4334K000 to 100kHz. Applications requiring operation above 100kHz should use the SRR1205-331KL or verify the original design frequency requirements.

Q: Do the substitute parts meet the same compliance standards as the original?

A: The B82464A4334K000 and SRR1205-331KL are both ROHS3 compliant and REACH unaffected. The B82464A4334K000 carries AEC-Q200 automotive qualification. The original N08DPA331K compliance status is not specified in available documentation.

Q: How does DC resistance variation affect circuit performance?

A: The B82464A4334K000 (1Ohm Max) provides lower resistance than the original (1.1Ohm Max), reducing power dissipation by approximately 9%. The SRR1205-331KL (1.34Ohm Max) increases dissipation by approximately 22%. For current-limited applications, the resistance increase in the SRR1205-331KL may require thermal analysis.