SMP3316-333M Equivalent & Substitute Parts

Part Overview

The SMP3316-333M is a 330 µH unshielded molded inductor manufactured by Gowanda Electronics, designed for surface mount applications. This component is rated for 770 mA continuous current with a maximum DC resistance of 870 mOhm and operates across the temperature range of -55°C to 125°C. The part maintains Active product status with 1161 units available in stock as new original inventory.

Alternative components become necessary when supply constraints occur, when specific mechanical or thermal requirements demand different core materials, or when design revisions require inductors with different saturation characteristics or DC resistance profiles.

Substiute Parts

SMP3316-333M

Gowanda ElectronicsIn Stock: 1212SMP3316-333M Datasheet

Current PartRFQ

SDR1005-331KL

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMP3316-333M is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value of 330 µH (tolerance variations acceptable within design margin)
• Surface mount configuration
• Unshielded construction
• Operating temperature range compatibility (-55°C to 125°C minimum)

Secondary Compatibility Factors:

• Current rating must support the application's maximum current demand
• DC resistance must not introduce unacceptable power loss in the circuit
• Saturation current characteristics must prevent core saturation under peak load conditions
• Physical dimensions must accommodate the PCB layout constraints

The SDR1005-331KL qualifies as a substitute based on matching inductance value, surface mount capability, unshielded design, and compatible operating temperature range. Differences in core material (ferrite drum core versus molded construction), tolerance specification (±10% versus ±20%), and DC resistance (1.15 Ohm versus 870 mOhm) represent trade-offs that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the SMP3316-333M and SDR1005-331KL maintain Active product status, ensuring continued availability and manufacturing support. The SMP3316-333M provides superior current handling capability (770 mA versus 550 mA) and lower DC resistance (870 mOhm versus 1.15 Ohm), making it the preferred choice for applications requiring maximum current capacity and minimal power dissipation.

The SDR1005-331KL offers tighter inductance tolerance (±10% versus ±20%) and extended low-temperature operation to -40°C, suitable for applications where inductance precision is critical or where the lower temperature limit of -40°C satisfies thermal requirements. The SDR1005-331KL is ROHS3 compliant, whereas the SMP3316-333M carries RoHS Not Applicable status.

Selection between these components depends on whether the application prioritizes current capacity and DC resistance performance or inductance tolerance and compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the SDR1005-331KL directly replace the SMP3316-333M in all applications?

A: Direct replacement is not universal. The SDR1005-331KL has a lower current rating (550 mA versus 770 mA) and higher DC resistance (1.15 Ohm versus 870 mOhm). Applications operating near the 770 mA current limit or sensitive to power dissipation require the SMP3316-333M. Applications with current demands below 550 mA can use the SDR1005-331KL.

Q: What is the significance of the inductance tolerance difference?

A: The SMP3316-333M specifies ±20% tolerance while the SDR1005-331KL specifies ±10%. Circuits requiring tighter inductance accuracy benefit from the SDR1005-331KL. Circuits with design margins accommodating ±20% variation can use either component.

Q: Are there physical dimension constraints between these parts?

A: Both components use nonstandard packages. The SMP3316-333M measures 0.530" L × 0.420" W × 0.236" H (13.46mm × 10.67mm × 6.00mm). The SDR1005-331KL measures 0.500" L × 0.394" W × 0.197" H (12.70mm × 10.00mm × 5.00mm). PCB layout must accommodate these dimensional differences.

Q: How do saturation current ratings affect circuit performance?

A: The SMP3316-333M saturates at 700 mA while the SDR1005-331KL saturates at 600 mA. Saturation causes inductance collapse and increased core losses. Applications with peak currents approaching these limits must use the component with the higher saturation rating.

Q: What is the operating temperature impact on substitution?

A: The SMP3316-333M operates from -55°C to 125°C while the SDR1005-331KL operates from -40°C to 125°C. Applications requiring operation below -40°C require the SMP3316-333M. Applications within the -40°C to 125°C range can use either component.