PM54-221K Equivalent & Substitute Parts

Part Overview

The PM54-221K is a 220 µH unshielded drum core wirewound inductor rated for 350 mA with 1.57Ohm DC resistance, manufactured by Bourns Inc. in the PM54 series. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement continuity. Equivalent and substitute inductors must maintain identical electrical specifications and mechanical compatibility to ensure proper circuit performance.

Substiute Parts

PM54-221K

Bourns Inc.In Stock: 992PM54-221K Datasheet

Current PartRFQ

PM54-221K-RC

Bourns Inc.In Stock: 7143PM54-221K-RC Datasheet

DirectRFQ

SDR0604-221KL

Bourns Inc.In Stock: 1389SDR0604-221KL Datasheet

DirectRFQ

CD54NP-221KC

Sumida America Components Inc.In Stock: 1017CD54NP-221KC Datasheet

SimilarRFQ

PD54R-224K

API Delevan Inc.In Stock: 918PD54R-224K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following critical parameters:

• Inductance value: 220 µH
• Tolerance: ±10%
• Current rating: 350 mA minimum
• DC resistance: 1.57Ohm (nominal or maximum specification)
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Physical footprint compatibility: 5.80mm x 5.80mm base dimensions

Substitute parts are classified into two categories:

Direct Manufacturer Substitutes maintain identical electrical and mechanical specifications with improved product status (active vs. obsolete) and enhanced compliance certifications.

Similar Manufacturer Substitutes meet all critical electrical parameters and mechanical compatibility requirements but originate from alternative manufacturers, with minor dimensional variations within acceptable tolerances.

Parameter Comparison

Engineering Selection Recommendations

PM54-221K-RC is the primary direct substitute. This part is manufactured by Bourns Inc. under the same PM54 series with identical electrical and mechanical specifications. The PM54-221K-RC maintains active product status, ROHS3 compliance, and an extended operating temperature range (-40°C ~ 125°C), providing superior long-term availability and regulatory alignment compared to the obsolete PM54-221K.

SDR0604-221KL is a direct Bourns Inc. alternative within the SDR0604 series. This inductor meets all critical electrical parameters and maintains identical package dimensions (5.80mm x 5.80mm x 4.80mm). ROHS3 compliance and active product status ensure procurement continuity. The SDR0604-221KL is suitable for applications requiring extended temperature performance (-40°C ~ 125°C).

CD54NP-221KC (Sumida America Components Inc.) and PD54R-224K (API Delevan Inc.) are functionally equivalent alternatives from alternative manufacturers. Both parts satisfy all electrical specifications and maintain surface mount compatibility. Minor dimensional variations (CD54NP-221KC: 5.80mm x 5.20mm; PD54R-224K: 5.70mm x 5.11mm) remain within acceptable PCB layout tolerances. Both are ROHS3 compliant with active product status.

Selection priority should follow: (1) PM54-221K-RC for direct series continuity; (2) SDR0604-221KL for Bourns ecosystem compatibility; (3) CD54NP-221KC or PD54R-224K for alternative sourcing and supply chain diversification.

Frequently Asked Questions (FAQ)

Q: Can PM54-221K-RC be used as a direct replacement for PM54-221K?

A: Yes. PM54-221K-RC is electrically and mechanically identical to PM54-221K with identical inductance (220 µH), current rating (350 mA), DC resistance (1.57Ohm), and package dimensions (5.80mm x 5.80mm). The primary difference is product status (active vs. obsolete) and enhanced compliance certifications (ROHS3).

Q: What are the dimensional compatibility considerations for substitute parts?

A: PM54-221K-RC and SDR0604-221KL maintain identical footprints (5.80mm x 5.80mm x 4.80mm). CD54NP-221KC has a slightly narrower width (5.20mm) and marginally taller height (4.85mm). PD54R-224K has reduced length (5.70mm), width (5.11mm), and height (4.50mm). These variations are within standard PCB layout tolerances for surface mount components.

Q: Are all substitute parts RoHS compliant?

A: PM54-221K is RoHS non-compliant. All substitute parts (PM54-221K-RC, SDR0604-221KL, CD54NP-221KC, PD54R-224K) are ROHS3 compliant, meeting current regulatory requirements for new designs and procurement.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes (PM54-221K-RC, SDR0604-221KL) are manufactured by Bourns Inc. and maintain identical or equivalent series designations. Similar substitutes (CD54NP-221KC, PD54R-224K) are manufactured by alternative suppliers (Sumida America Components Inc., API Delevan Inc.) but meet all critical electrical and mechanical specifications.

Q: Can substitute parts be used in high-temperature applications?

A: PM54-221K operates within -30°C ~ 100°C. PM54-221K-RC and SDR0604-221KL extend this range to -40°C ~ 125°C. PD54R-224K provides the widest range (-55°C ~ 125°C). CD54NP-221KC operates within -40°C ~ 100°C. Selection depends on specific application temperature requirements.

Q: Are there any electrical performance differences between substitute parts?

A: All substitute parts maintain the specified 220 µH inductance, ±10% tolerance, 350 mA current rating, and 1.57Ohm DC resistance. PM54-221K-RC and SDR0604-221KL provide additional electrical characterization data (saturation current, Q factor, self-resonant frequency) compared to the original PM54-221K, indicating enhanced product maturity.