SMP3316-103M Equivalent & Substitute Parts

Part Overview

The SMP3316-103M is a 100 µH unshielded molded inductor manufactured by Gowanda Electronics, designed for surface mount applications requiring moderate current handling. This component is classified as Active product status with 913 pieces currently in stock. The SMP3316-103M serves applications requiring fixed inductance values in compact form factors with operating temperature range from -55°C to 125°C. Substitute parts may be required due to inventory constraints, lead time considerations, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within design parameters.

Substiute Parts

SMP3316-103M

Gowanda ElectronicsIn Stock: 978SMP3316-103M Datasheet

Current PartRFQ

SDR1005-101KL

Bourns Inc.In Stock: 3520SDR1005-101KL Datasheet

SimilarRFQ

SDR1005-102KL

Bourns Inc.In Stock: 20941SDR1005-102KL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMP3316-103M are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 100 µH (exact match required)
• Inductance tolerance: ±10% or tighter acceptable (SMP3316-103M specifies ±20%)
• Current rating: Minimum 1.0 A (SMP3316-103M rated at 1.4 A)
• DC Resistance: Maximum 330 mOhm (SMP3316-103M specifies 260 mOhm max)
• Shielding: Unshielded (matching electromagnetic profile)
• Mounting type: Surface Mount (package compatibility)
• Operating temperature range: Minimum -40°C to 125°C (SMP3316-103M operates -55°C to 125°C)

Identified Substitute: The SDR1005-101KL from Bourns Inc. meets the primary matching criteria with 100 µH inductance, 1 A current rating, 330 mOhm DCR, unshielded construction, and surface mount configuration. This part is Active status with ROHS3 compliance and 3418 pieces in stock.

The SDR1005-102KL does not qualify as a substitute due to different inductance value (1 mH instead of 100 µH) and significantly lower current rating (300 mA versus 1.4 A requirement).

Parameter Comparison

Engineering Selection Recommendations

SMP3316-103M (Primary Selection): Active product status with established supply (913 pieces in stock). Suitable for applications requiring the specified -55°C to 125°C operating temperature range. RoHS status is not applicable; verify compliance requirements for your application.

SDR1005-101KL (Substitute Selection): Active product status with superior availability (3418 pieces in stock). ROHS3 compliant, meeting modern regulatory requirements. Acceptable for applications where current requirements do not exceed 1.0 A and lower operating temperature limit of -40°C is acceptable. Tighter inductance tolerance (±10%) provides improved performance consistency. Smaller physical footprint (0.500" x 0.394" x 0.197" max height) may provide PCB layout advantages. Higher DC resistance (330 mOhm vs. 260 mOhm) results in increased power dissipation; thermal analysis required for high-current applications.

Both parts are surface mount, unshielded, 100 µH inductors in Tape & Reel packaging with unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can SDR1005-101KL directly replace SMP3316-103M in all applications?

A: Direct replacement is possible only when application current requirements do not exceed 1.0 A and minimum operating temperature requirement is -40°C or higher. The SDR1005-101KL has lower current rating (1.0 A vs. 1.4 A) and narrower temperature range (-40°C to 125°C vs. -55°C to 125°C). Verify these parameters against your circuit design specifications before substitution.

Q: What are the physical compatibility considerations?

A: The SDR1005-101KL is physically smaller (0.500" L x 0.394" W x 0.197" max height) compared to SMP3316-103M (0.530" L x 0.420" W x 0.236" max height). Both use nonstandard packages and surface mount configuration. PCB footprint compatibility must be confirmed; the smaller SDR1005-101KL may fit existing SMP3316-103M pads with margin, but layout verification is required.

Q: How do the DC resistance values affect circuit performance?

A: SMP3316-103M specifies 260 mOhm maximum DCR, while SDR1005-101KL specifies 330 mOhm maximum. The 70 mOhm difference results in increased power dissipation in the substitute part. At 1.0 A, this represents approximately 33 mW additional loss. For applications sensitive to inductor losses or thermal performance, calculate total circuit power dissipation to confirm acceptability.

Q: What is the difference between molded and drum core construction?

A: SMP3316-103M uses molded construction; SDR1005-101KL uses drum core wirewound construction. Both are unshielded. Molded inductors typically offer better mechanical robustness and consistent performance. Wirewound drum core inductors provide higher Q factor (41 @ 56 kHz for SDR1005-101KL) and defined self-resonant frequency (8 MHz). Construction differences may affect EMI characteristics; evaluate for your specific application requirements.

Q: Are there compliance or regulatory differences?

A: SDR1005-101KL is ROHS3 compliant; SMP3316-103M RoHS status is not applicable. Both are REACH unaffected and carry EAR99 ECCN classification. For applications requiring RoHS compliance, SDR1005-101KL meets this requirement. Verify your application's regulatory requirements before final selection.

Q: What inductance tolerance should I expect?

A: SMP3316-103M specifies ±20% tolerance; SDR1005-101KL specifies ±10% tolerance. The tighter tolerance of the substitute part provides more consistent inductance values across production batches, which may improve circuit performance predictability in applications sensitive to inductance variation.