PM0805-3N3M Equivalent & Substitute Parts

Part Overview

The PM0805-3N3M is a 3.3 nH unshielded drum core wirewound inductor manufactured by Bourns Inc., designed for surface mount applications in the 0805 (2012 Metric) package. This component is rated for 600 mA current with a maximum DC resistance of 80mOhm and operates across a temperature range of -55°C to 125°C. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

PM0805-3N3M

Bourns Inc.In Stock: 724PM0805-3N3M Datasheet

Current PartRFQ

CW201212-3N3J

Bourns Inc.In Stock: 876CW201212-3N3J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM0805-3N3M is determined by strict alignment across the following critical parameters: inductance value (3.3 nH), current rating (600 mA minimum), DC resistance specification (80mOhm maximum), package form factor (0805/2012 Metric), core type (ceramic drum core), and shielding configuration (unshielded). The CW201212-3N3J meets all mandatory electrical and mechanical requirements for direct substitution. Tolerance variations and product status differences do not preclude functional equivalence when all primary electrical and physical parameters align.

Parameter Comparison

Engineering Selection Recommendations

The CW201212-3N3J is a direct functional equivalent to the PM0805-3N3M. Both components share identical inductance values, current ratings, DC resistance specifications, package dimensions, and core configurations. The CW201212-3N3J offers the advantage of active product status, ensuring ongoing availability and supply chain continuity. Additionally, the CW201212-3N3J provides ROHS3 compliance, whereas the PM0805-3N3M is non-compliant. For applications requiring RoHS compliance or long-term component availability, the CW201212-3N3J is the preferred selection. The tighter inductance tolerance (±5% versus ±20%) of the CW201212-3N3J may provide improved circuit performance in precision applications. The operating temperature range of the CW201212-3N3J extends to -40°C minimum, which is acceptable for most industrial and commercial applications; designs requiring operation below -40°C must retain the PM0805-3N3M or identify alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the CW201212-3N3J replace the PM0805-3N3M in existing designs?

A: Yes. Both components are electrically and mechanically equivalent across all critical parameters: 3.3 nH inductance, 600 mA current rating, 80mOhm DC resistance, and 0805 (2012 Metric) package form factor. Direct substitution is permissible without circuit redesign.

Q: What is the significance of the inductance tolerance difference?

A: The PM0805-3N3M specifies ±20% tolerance, while the CW201212-3N3J specifies ±5% tolerance. The tighter tolerance of the CW201212-3N3J provides greater inductance value consistency. For circuits sensitive to inductance variation, the CW201212-3N3J offers improved performance predictability.

Q: Are there temperature range limitations when substituting?

A: The CW201212-3N3J operates from -40°C to 125°C, compared to the PM0805-3N3M range of -55°C to 125°C. Applications requiring operation below -40°C cannot use the CW201212-3N3J as a substitute.

Q: What is the impact of the Q factor difference at 1.5GHz?

A: The PM0805-3N3M exhibits Q of 50 @ 1.5GHz, while the CW201212-3N3J exhibits Q of 30 @ 1.5GHz. Higher Q indicates lower losses at the specified frequency. For RF or high-frequency applications where Q factor is critical, this difference should be evaluated against circuit requirements.

Q: Does RoHS compliance affect substitution decisions?

A: The CW201212-3N3J is ROHS3 compliant, while the PM0805-3N3M is non-compliant. For applications or supply chains requiring RoHS compliance, the CW201212-3N3J is mandatory. For legacy systems without compliance requirements, either component is functionally acceptable.

Q: Are packaging and tape & reel considerations relevant?

A: The CW201212-3N3J is supplied in Tape & Reel (TR) packaging. Both components share identical physical dimensions and mounting characteristics, ensuring compatibility with standard surface mount assembly equipment and processes.