SMP5022-331M Equivalent & Substitute Parts

Part Overview

The SMP5022-331M is a 3.3 µH unshielded molded inductor manufactured by Gowanda Electronics, designed for surface mount applications requiring moderate current handling up to 6.2 A. This component is classified as Active product status with 914 units currently in stock. Alternative components become necessary when supply constraints occur, when specific thermal or mechanical requirements demand different core construction, or when performance characteristics of substitute designs better align with application requirements.

Substiute Parts

SMP5022-331M

Gowanda ElectronicsIn Stock: 1013SMP5022-331M Datasheet

Current PartRFQ

SDR1806-3R3ML

Bourns Inc.In Stock: 1672SDR1806-3R3ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The SDR1806-3R3ML from Bourns Inc. qualifies as a direct substitute for the SMP5022-331M based on the following critical parameters:

• Inductance Value: Both components specify 3.3 µH at 100 kHz test frequency with ±20% tolerance
• Saturation Current: Both rated at 17 A Isat, ensuring equivalent current handling capability under saturation conditions
• Core Material: Both utilize ferrite core construction
• Shielding Configuration: Both are unshielded designs
• Mounting Type: Both are surface mount components
• Moisture Sensitivity: Both classified as MSL 1 (Unlimited)
• Environmental Compliance: Both are REACH Unaffected and classified as EAR99

The primary differences between these components are construction type (molded versus drum core wirewound), DC resistance characteristics, and operating temperature range, which do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Selection between the SMP5022-331M and SDR1806-3R3ML should be based on the following criteria:

SMP5022-331M is appropriate when:

• Extended low-temperature operation below -40°C is required (rated to -55°C)
• Molded construction characteristics are specified in design requirements
• RoHS applicability status matches procurement specifications

SDR1806-3R3ML is appropriate when:

• Lower DC resistance is beneficial for thermal management (9.8 mOhm versus 15 mOhm)
• Higher continuous current rating provides additional margin (7.6 A versus 6.2 A)
• ROHS3 compliance is mandated by procurement or regulatory requirements
• Drum core wirewound construction is acceptable for the application

Both components maintain identical inductance values, saturation current ratings, and core material specifications, ensuring functional equivalence for standard circuit applications.

Frequently Asked Questions (FAQ)

Q: Can SDR1806-3R3ML replace SMP5022-331M in all applications?

A: Substitution is valid when application requirements do not mandate the extended low-temperature range (-55°C) of the SMP5022-331M. The SDR1806-3R3ML operates from -40°C to 125°C. Both components share identical inductance, saturation current, and core material specifications.

Q: What is the significance of the different DC resistance values?

A: The SDR1806-3R3ML exhibits lower DC resistance (9.8 mOhm) compared to the SMP5022-331M (15 mOhm). Lower resistance reduces resistive losses and heat generation during operation, which may be advantageous in high-current applications but does not affect inductance value or saturation characteristics.

Q: Are there physical dimension differences between these components?

A: Yes. The SMP5022-331M measures 0.750" L x 0.620" W x 0.280" H (19.04mm x 15.74mm x 7.11mm), while the SDR1806-3R3ML measures 0.720" L x 0.551" W x 0.272" H (18.30mm x 14.00mm x 6.90mm). PCB layout and mechanical clearance requirements must be verified before substitution.

Q: What does the difference in construction type (molded versus drum core wirewound) mean for circuit performance?

A: Both construction types achieve the specified 3.3 µH inductance and 17 A saturation current. The molded design (SMP5022-331M) and drum core wirewound design (SDR1806-3R3ML) differ in manufacturing process and internal structure but deliver equivalent electrical performance for the specified parameters.

Q: Is RoHS compliance a factor in selecting between these parts?

A: The SMP5022-331M is marked as "Not applicable" for RoHS status, while the SDR1806-3R3ML is ROHS3 compliant. If RoHS3 compliance is required by procurement specifications or end-use regulations, the SDR1806-3R3ML must be selected.

Q: Do both components have the same moisture sensitivity rating?

A: Yes. Both the SMP5022-331M and SDR1806-3R3ML are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.