PM54-330L Equivalent & Substitute Parts

Part Overview

The PM54-330L is a 33 µH unshielded drum core wirewound inductor rated for 880 mA with 230mOhm DC resistance, manufactured by Bourns Inc. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part operates across -30°C to 100°C and is housed in a nonstandard surface mount package measuring 5.80mm x 5.80mm x 4.80mm.

Substiute Parts

PM54-330L

Bourns Inc.In Stock: 1025PM54-330L Datasheet

Current PartRFQ

PM54-330L-RC

Bourns Inc.In Stock: 11269PM54-330L-RC Datasheet

DirectRFQ

SDR0604-330KL

Bourns Inc.In Stock: 16847SDR0604-330KL Datasheet

DirectRFQ

CD54NP-330LC

Sumida America Components Inc.In Stock: 649CD54NP-330LC Datasheet

SimilarRFQ

CR54NP-330LC

Sumida America Components Inc.In Stock: 2410CR54NP-330LC Datasheet

SimilarRFQ

PD54R-333K

API Delevan Inc.In Stock: 1194PD54R-333K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM54-330L are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 33 µH (exact match required)
• Current rating: 880 mA minimum
• DC resistance: 230mOhm to 280mOhm range
• Core material: Ferrite
• Shielding: Unshielded
• Mounting type: Surface Mount
• Package footprint: 5.80mm x 5.80mm nominal

Substitution Categories:

Direct substitutes maintain identical electrical specifications with improved compliance or packaging. PM54-330L-RC is a direct Bourns equivalent with active product status and RoHS3 compliance.

Cross-manufacturer substitutes from Bourns (SDR0604-330KL), Sumida (CD54NP-330LC, CR54NP-330LC), and API Delevan (PD54R-333K) meet the core electrical requirements with minor variations in DCR, tolerance, and temperature range.

Parameter Comparison

Engineering Selection Recommendations

PM54-330L-RC is the primary substitute for new designs. It maintains Bourns manufacturing continuity, offers active product status, and achieves RoHS3 compliance. The 20mOhm increase in DCR (250mOhm vs. 230mOhm) remains within acceptable tolerance for most applications. Extended operating temperature range (-40°C to 125°C) provides improved thermal margin.

SDR0604-330KL serves as an alternative Bourns option with tighter inductance tolerance (±10%) and identical current rating. Higher inventory availability supports volume procurement. DCR specification of 250mOhm Max aligns with PM54-330L-RC performance.

CD54NP-330LC and CR54NP-330LC are Sumida alternatives matching the original 230mOhm DCR specification. Both maintain RoHS3 compliance and active product status. Dimensional variations (5.20mm to 5.30mm width) require PCB layout verification for footprint compatibility.

PD54R-333K from API Delevan provides the widest operating temperature range (-55°C to 125°C) and highest current rating (900 mA). The 280mOhm maximum DCR represents the upper acceptable limit for this substitution group. Tighter inductance tolerance (±10%) supports precision applications.

All substitute parts maintain ferrite core construction, unshielded configuration, and surface mount compatibility with the original PM54-330L.

Frequently Asked Questions (FAQ)

Q: Can PM54-330L-RC be used as a direct replacement for PM54-330L?

A: Yes. PM54-330L-RC maintains identical inductance (33 µH), current rating (880 mA), and core construction. The 20mOhm increase in DCR falls within normal component tolerance and does not affect circuit functionality in standard applications. RoHS3 compliance provides regulatory advantage for new designs.

Q: What is the significance of the DCR variation across substitute parts?

A: DC resistance directly impacts power dissipation and thermal performance. The PM54-330L specifies 230mOhm, while substitutes range from 230mOhm to 280mOhm. For current-limiting or filtering applications, verify that the higher DCR does not exceed thermal or efficiency requirements. In most switching and filtering circuits, this variation is acceptable.

Q: Are all substitute parts compatible with the original PCB footprint?

A: Footprint compatibility requires verification. While all parts share the 5.80mm nominal length, width varies from 5.20mm to 5.30mm, and height from 4.50mm to 4.85mm. CD54NP-330LC and CR54NP-330LC have slightly reduced width (5.20mm and 5.30mm respectively). Confirm PCB pad layout accommodates these dimensional tolerances before assembly.

Q: Which substitute offers the best compliance profile?

A: All active substitutes (PM54-330L-RC, SDR0604-330KL, CD54NP-330LC, CR54NP-330LC, PD54R-333K) are RoHS3 compliant. The original PM54-330L is RoHS non-compliant. For applications requiring regulatory compliance, any active substitute meets current environmental standards.

Q: What is the difference between inductance tolerance specifications?

A: PM54-330L, PM54-330L-RC, CD54NP-330LC, and CR54NP-330LC specify ±15% tolerance. SDR0604-330KL and PD54R-333K specify ±10% tolerance. Tighter tolerance (±10%) provides better inductance consistency for precision filtering, resonant circuits, or impedance matching applications. Standard tolerance (±15%) is acceptable for general-purpose filtering and energy storage.

Q: Can PD54R-333K replace PM54-330L in high-temperature applications?

A: PD54R-333K extends the upper operating temperature to 125°C (versus 100°C for PM54-330L) and lower temperature to -55°C. This makes it suitable for extended temperature range applications. However, verify that the 280mOhm maximum DCR and 900 mA current rating align with circuit requirements, as these differ from the original specification.

Q: What inventory considerations apply to substitute selection?

A: SDR0604-330KL offers the highest inventory (16816 Pcs), followed by PM54-330L-RC (11201 Pcs). For volume production, SDR0604-330KL provides supply security. For legacy system support, PM54-330L-RC maintains Bourns continuity. Sumida parts (CD54NP-330LC, CR54NP-330LC) and API Delevan (PD54R-333K) have lower inventory levels and may require longer lead times for large orders.