PM3316-331M Equivalent & Substitute Parts

Part Overview

The PM3316-331M is a 330 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 600 mA with 1.02Ohm DC resistance. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across -55°C to 105°C and is RoHS non-compliant, requiring careful selection of alternatives based on application requirements and compliance needs.

Substiute Parts

PM3316-331M

Bourns Inc.In Stock: 710PM3316-331M Datasheet

Current PartRFQ

CM453232-221KL

Bourns Inc.In Stock: 25846CM453232-221KL Datasheet

DirectRFQ

PM3316-331M-RC

Bourns Inc.In Stock: 4004PM3316-331M-RC Datasheet

DirectRFQ

SDR1005-331KL

Bourns Inc.In Stock: 1498SDR1005-331KL Datasheet

SimilarRFQ

ASPI-0804T-331M-T

Abracon LLCIn Stock: 908ASPI-0804T-331M-T Datasheet

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P0752.334NLT

Pulse ElectronicsIn Stock: 6340P0752.334NLT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PM3316-331M are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 330 µH (exact match required)
• Current rating: minimum 550 mA (PM3316-331M rated at 600 mA)
• DC resistance: maximum 1.15Ohm (PM3316-331M at 1.02Ohm)
• Core type: Ferrite, unshielded wirewound construction
• Mounting: Surface mount, nonstandard package footprint

Substitute Categories:

Direct Equivalent (Same Series): PM3316-331M-RC maintains identical inductance, core type, and footprint with slightly reduced current rating (550 mA vs 600 mA) and marginally higher DCR (1.15Ohm vs 1.02Ohm). Active product status with ROHS3 compliance.

Functional Equivalent (Alternative Manufacturer, Same Specs): SDR1005-331KL and ASPI-0804T-331M-T provide 330 µH inductance with 550-600 mA current ratings and comparable DCR values. Both maintain ferrite drum core construction and nonstandard package dimensions within acceptable mechanical tolerances.

Cross-Manufacturer Alternative: P0752.334NLT from Pulse Electronics matches inductance, current rating, and DCR specifications with extended operating temperature range (-40°C ~ 130°C).

Limited Compatibility: CM453232-221KL differs significantly in inductance (220 µH vs 330 µH) and current rating (100 mA vs 600 mA), making it unsuitable as a direct substitute despite same manufacturer origin.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PM3316-331M-RC is the preferred substitute. It maintains identical inductance and footprint as the obsolete PM3316-331M while offering active product status and ROHS3 compliance. The 50 mA reduction in current rating (550 mA vs 600 mA) and 0.13Ohm increase in DCR are acceptable for most applications operating below maximum rated current. Extended operating temperature range (-55°C ~ 125°C) provides improved thermal coverage.

Secondary Recommendation: SDR1005-331KL provides equivalent electrical performance with tighter inductance tolerance (±10% vs ±20%), beneficial for precision applications. Identical footprint and ferrite drum core construction ensure mechanical compatibility. ROHS3 compliance and active status support long-term availability.

Alternative for Extended Temperature Range: P0752.334NLT from Pulse Electronics matches the original PM3316-331M specifications exactly (330 µH, 600 mA, 1.02Ohm DCR) with the widest operating temperature range (-40°C ~ 130°C). Mechanical dimensions vary slightly (12.95 x 9.40 x 5.46mm), requiring PCB layout verification. ROHS3 compliance confirmed.

Not Recommended: CM453232-221KL is unsuitable as a substitute due to significantly lower inductance (220 µH vs 330 µH) and current rating (100 mA vs 600 mA), representing a different component class entirely.

Frequently Asked Questions (FAQ)

Q: Can PM3316-331M-RC directly replace PM3316-331M without circuit modification?

A: Yes, for most applications. Both parts share identical inductance (330 µH), tolerance (±20%), and footprint. The 50 mA current rating reduction and 0.13Ohm DCR increase are negligible in circuits operating below 550 mA. Verify application current requirements before selection.

Q: What is the primary reason for substitution?

A: PM3316-331M is classified as obsolete. PM3316-331M-RC, SDR1005-331KL, ASPI-0804T-331M-T, and P0752.334NLT are active products with confirmed long-term availability and ROHS3 compliance.

Q: Are there mechanical compatibility concerns with substitute parts?

A: PM3316-331M-RC and SDR1005-331KL maintain identical footprints (12.70 x 10.00mm). ASPI-0804T-331M-T and P0752.334NLT have slightly different dimensions (12.95 x 9.40mm). Verify PCB pad layout and clearances before design implementation.

Q: Which substitute offers the best compliance profile?

A: All active substitutes (PM3316-331M-RC, SDR1005-331KL, ASPI-0804T-331M-T, P0752.334NLT) are ROHS3 compliant. The original PM3316-331M is RoHS non-compliant. Selection should prioritize compliance requirements for your application and target markets.

Q: Does inductance tolerance affect circuit performance?

A: PM3316-331M and PM3316-331M-RC both specify ±20% tolerance. SDR1005-331KL offers tighter ±10% tolerance, beneficial for precision filtering, resonant circuits, or impedance-critical applications. Evaluate circuit sensitivity to inductance variation.

Q: What is the temperature operating range consideration?

A: PM3316-331M operates -55°C ~ 105°C. PM3316-331M-RC extends to -55°C ~ 125°C. P0752.334NLT provides the widest range (-40°C ~ 130°C). Select based on application thermal environment and thermal cycling requirements.

Q: Is packaging format a concern for substitution?

A: All substitutes are surface mount components in nonstandard packages. Verify your assembly equipment supports the specific package dimensions. CM453232-221KL uses standard 1812 (4532 Metric) package and is not recommended due to different electrical specifications.