0805-33NK Equivalent & Substitute Parts

Part Overview

The API Delevan Inc. 0805-33NK is a 33 nH unshielded drum core wirewound inductor rated for 500 mA continuous current with a maximum DC resistance of 270mOhm. This part operates across the temperature range of -40°C to 125°C and is classified as obsolete. Due to the obsolete status and limited active manufacturing, substitute parts with matching or superior electrical characteristics are necessary for design continuity and procurement reliability.

Substiute Parts

0805-33NK

API Delevan Inc.In Stock: 8440805-33NK Datasheet

Current PartRFQ

CW201212-33NJ

Bourns Inc.In Stock: 6985CW201212-33NJ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 0805-33NK with the Bourns CW201212-33NJ is based on the following matching electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 33 nH (identical)
• Current rating: 500 mA (identical)
• Core material: Ceramic (identical)
• Shielding: Unshielded (identical)
• Operating temperature range: -40°C to 125°C (identical)
• Mounting type: Surface Mount (identical)
• Package classification: 0805 (2012 Metric) form factor compliance

Variant Parameters (Acceptable Differences):

• DC Resistance: CW201212-33NJ specifies 150mOhm versus 0805-33NK at 270mOhm maximum (lower DCR improves efficiency)
• Inductance tolerance: CW201212-33NJ provides ±5% versus ±10% (tighter tolerance improves stability)
• Product status: CW201212-33NJ is active production status versus obsolete

Parameter Comparison

Engineering Selection Recommendations

The Bourns CW201212-33NJ provides a direct functional substitute for the API Delevan 0805-33NK with the following advantages:

The CW201212-33NJ maintains all critical electrical specifications required for circuit functionality: 33 nH inductance, 500 mA current rating, ceramic core construction, and matching operating temperature range. The substitute part offers measurable improvements in DC resistance (150mOhm versus 270mOhm maximum) and inductance tolerance (±5% versus ±10%), resulting in enhanced circuit performance and consistency.

The CW201212-33NJ carries active production status, ensuring procurement availability and supply chain reliability. The part holds ROHS3 compliance certification, addressing regulatory requirements applicable to current manufacturing standards. The substitute part is catalogued under standard 0805 (2012 Metric) packaging classification, providing clear mechanical compatibility and interchangeability for surface mount assembly operations.

Frequently Asked Questions (FAQ)

Q: What determines compatibility between the 0805-33NK and CW201212-33NJ?

A: Both parts share identical inductance values (33 nH), current ratings (500 mA), core material (ceramic), shielding type (unshielded), and operating temperature range (-40°C to 125°C). These parameters establish functional equivalence in RF and high-frequency circuit applications.

Q: Is the lower DCR of the CW201212-33NJ a concern for circuit substitution?

A: The CW201212-33NJ exhibits lower DC resistance (150mOhm) compared to the maximum specification of the 0805-33NK (270mOhm). Lower DCR reduces resistive losses and heat generation, providing equivalent or improved performance in RF and analog circuit applications where inductors are utilized.

Q: How do package dimensions affect physical interchangeability?

A: The 0805-33NK utilizes a nonstandard package, while the CW201212-33NJ conforms to the standard 0805 (2012 Metric) form factor with dimensions of 0.083" L x 0.059" W. Pad layouts and mechanical footprints require verification during circuit board redesign to ensure assembly process compatibility.

Q: What is the significance of RoHS compliance differences?

A: The CW201212-33NJ carries ROHS3 compliance, while the 0805-33NK is RoHS non-compliant. Selection of compliant components aligns with current regulatory frameworks applicable to electronics manufacturing and distribution in regulated markets. RoHS compliance may be a requirement for end-use applications depending on regional restrictions.

Q: Why has the 0805-33NK been designated as obsolete?

A: Obsolescence indicates discontinuation of active manufacturing by the original equipment manufacturer. The 0805-33NK remains available through existing inventory channels, but procurement forward planning necessitates identification of substitute parts with confirmed active production status, such as the CW201212-33NJ.