SMP3316-472M Equivalent & Substitute Parts

Part Overview

The SMP3316-472M is a 47 µH unshielded molded inductor manufactured by Gowanda Electronics, designed for surface mount applications requiring 2 A current rating. This component is classified as Active product status with 844 pieces currently in stock. Alternative components become necessary when addressing supply chain constraints, specific performance requirements, or design optimization needs within the allowable parameter ranges for 47 µH inductors in surface mount packages.

Substiute Parts

SMP3316-472M

Gowanda ElectronicsIn Stock: 944SMP3316-472M Datasheet

Current PartRFQ

SDR1005-470KL

Bourns Inc.In Stock: 4580SDR1005-470KL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMP3316-472M is determined by the following critical parameters:

Inductance value must remain 47 µH to maintain circuit functionality. Current rating of the substitute must meet or exceed the application requirement; the SMP3316-472M specifies 2 A, establishing a minimum threshold. DC resistance affects power dissipation and thermal performance; substitutes with higher DCR values introduce additional losses. Shielding classification must match unshielded topology to prevent electromagnetic interference changes. Operating temperature range must encompass the application environment; the SMP3316-472M operates from -55°C to 125°C. Mounting type must be surface mount to ensure mechanical and electrical compatibility with PCB assembly processes. Package classification as nonstandard requires physical dimension compatibility within the specified footprint.

The SDR1005-470KL qualifies as a substitute based on matching inductance (47 µH), unshielded configuration, surface mount mounting type, and nonstandard package classification. However, the current rating differential (1.4 A versus 2 A) and DCR specification (190 mOhm Max versus 130 mOhm Max) represent design trade-offs requiring application-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

Selection between the SMP3316-472M and SDR1005-470KL depends on application current requirements and thermal constraints. The SMP3316-472M provides higher current capacity (2 A versus 1.4 A) and lower DC resistance (130 mOhm Max versus 190 mOhm Max), resulting in reduced power dissipation. The SDR1005-470KL offers tighter inductance tolerance (±10% versus ±20%) and ROHS3 compliance status. Both components maintain unlimited moisture sensitivity classification and REACH unaffected status. The SDR1005-470KL operates within a narrower temperature range (-40°C to 125°C versus -55°C to 125°C), which may limit applicability in extreme low-temperature environments. Physical dimensions differ; the SDR1005-470KL is smaller in footprint and height, potentially offering space optimization benefits in constrained PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the SDR1005-470KL directly replace the SMP3316-472M in all applications?

A: Direct replacement depends on application current requirements. If circuit current demand exceeds 1.4 A, the SDR1005-470KL is not suitable. If current remains below 1.4 A, substitution is feasible with consideration for increased DC resistance and resulting thermal effects.

Q: What is the significance of the DCR difference between these components?

A: DC resistance directly affects power dissipation in the inductor. The SMP3316-472M at 130 mOhm Max dissipates less power than the SDR1005-470KL at 190 mOhm Max at equivalent current levels. In high-current or thermally constrained applications, this difference becomes critical.

Q: Are there physical compatibility concerns with substitution?

A: Yes. The SMP3316-472M measures 0.530" L x 0.420" W x 0.236" H, while the SDR1005-470KL measures 0.500" L x 0.394" W x 0.197" H. PCB footprint and clearance requirements must accommodate these dimensional differences. The smaller SDR1005-470KL may fit in space-constrained designs but requires PCB layout verification.

Q: How do tolerance specifications affect circuit performance?

A: The SDR1005-470KL provides ±10% inductance tolerance compared to the SMP3316-472M at ±20%. Tighter tolerance reduces inductance variation across production batches, beneficial for applications requiring precise frequency response or impedance matching.

Q: What are the temperature range implications?

A: The SMP3316-472M operates from -55°C to 125°C, while the SDR1005-470KL operates from -40°C to 125°C. Applications requiring operation below -40°C must use the SMP3316-472M. Both components support standard industrial temperature ranges above -40°C.

Q: Does RoHS compliance status affect substitution decisions?

A: The SDR1005-470KL is ROHS3 compliant, while the SMP3316-472M is not applicable for RoHS classification. If design requirements mandate RoHS compliance, the SDR1005-470KL is the appropriate selection, provided current and thermal requirements are satisfied.