SMP3316-331M Equivalent & Substitute Parts

Part Overview

The SMP3316-331M is a 3.3 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 837 units currently in stock. Alternative components become necessary when addressing supply chain constraints, specific thermal requirements, or when design specifications permit tolerance variations within the allowed electrical parameters.

Substiute Parts

SMP3316-331M

Gowanda ElectronicsIn Stock: 869SMP3316-331M Datasheet

Current PartRFQ

SDR1005-3R3ML

Bourns Inc.In Stock: 2498SDR1005-3R3ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SDR1005-3R3ML from Bourns Inc. qualifies as a substitute based on the following alignment of critical electrical parameters:

• Inductance value matches at 3.3 µH with identical ±20% tolerance
• Unshielded configuration matches the main part specification
• Surface mount mounting type is consistent
• Moisture Sensitivity Level 1 (Unlimited) matches the main part
• Operating temperature range of -40°C ~ 125°C encompasses the primary operating window, with the upper limit matching the main part

Substitution is constrained by the following parameter differences that must be evaluated for specific applications:

• Current Rating: SDR1005-3R3ML rated at 5 A versus SMP3316-331M at 6.5 A
• Saturation Current: SDR1005-3R3ML at 6.4 A versus SMP3316-331M at 7 A
• DC Resistance: SDR1005-3R3ML at 15 mOhm Max versus SMP3316-331M at 12.8 mOhm Max
• Physical dimensions differ slightly between the two packages

Parameter Comparison

Engineering Selection Recommendations

The SMP3316-331M remains the primary selection for applications requiring the full 6.5 A current rating and lower DC resistance of 12.8 mOhm Max. The extended operating temperature range of -55°C to 125°C supports applications in extreme cold environments.

The SDR1005-3R3ML from Bourns Inc. serves as a functional substitute for applications where current requirements do not exceed 5 A and where the increased DC resistance of 15 mOhm Max is acceptable. The SDR1005-3R3ML carries ROHS3 compliance certification, which may be required for specific regulatory or customer requirements. Both components maintain identical inductance values and tolerance specifications, ensuring equivalent performance in the primary electrical function.

Frequently Asked Questions (FAQ)

Q: Can SDR1005-3R3ML replace SMP3316-331M in all applications?

A: No. The SDR1005-3R3ML has a lower current rating of 5 A compared to the SMP3316-331M at 6.5 A. Applications requiring sustained currents above 5 A must use the SMP3316-331M to avoid saturation and component failure.

Q: What is the impact of the 2.2 mOhm difference in DC resistance?

A: The SDR1005-3R3ML exhibits 15 mOhm Max DC resistance versus 12.8 mOhm Max for the SMP3316-331M. In circuits where power dissipation is critical, this 17% increase in resistance will result in proportionally higher I²R losses. Applications with tight thermal budgets should retain the SMP3316-331M.

Q: Are the physical dimensions compatible?

A: Both components are nonstandard package types with different dimensions. The SMP3316-331M measures 0.530" L x 0.420" W x 0.236" H, while the SDR1005-3R3ML measures 0.500" L x 0.394" W x 0.197" H. PCB layout and mechanical clearance must be verified before substitution.

Q: Does the operating temperature range difference affect substitution?

A: The SMP3316-331M operates from -55°C to 125°C, while the SDR1005-3R3ML operates from -40°C to 125°C. Applications requiring operation below -40°C must use the SMP3316-331M.

Q: What is the significance of ROHS3 compliance on the SDR1005-3R3ML?

A: ROHS3 compliance indicates the SDR1005-3R3ML meets Restriction of Hazardous Substances directives. If regulatory or customer specifications mandate ROHS3 certification, the SDR1005-3R3ML is the appropriate selection.