IMS05WDSTR33K40 Equivalent & Substitute Parts

Part Overview

The IMS05WDSTR33K40 is a 330 nH shielded inductor manufactured by Vishay Dale, designed for applications requiring fixed inductance with moderate current handling. This axial-lead component operates at 1.9 A maximum current with 90 mOhm maximum DC resistance. The part belongs to the IMS-5WD-40 series and is suitable for general-purpose RF and power filtering applications where compact shielded inductors are required.

Substitute parts become necessary when the primary component reaches end-of-life status, experiences supply constraints, or when design requirements permit operation within relaxed electrical parameters while maintaining the same inductance value and form factor.

Substiute Parts

IMS05WDSTR33K40

Vishay DaleIn Stock: 1189IMS05WDSTR33K40 Datasheet

Current PartRFQ

IMS5SWDEBR33K65

Vishay DaleIn Stock: 888IMS5SWDEBR33K65 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IMS05WDSTR33K40 is determined by the following criteria:

• Inductance Value: Must be 330 nH (exact match required)
• Package Style: Must be axial through-hole configuration
• Shielding: Must be shielded construction
• Current Rating: Substitute must support minimum 1.9 A operation
• DC Resistance: Substitute DC resistance must not exceed 90 mOhm

The IMS5SWDEBR33K65 qualifies as a substitute because it maintains the same 330 nH inductance, axial through-hole package, and shielded construction. Although the current rating is reduced to 1.3 A and DC resistance increases to 130 mOhm, these parameters represent relaxed electrical specifications that may be acceptable depending on circuit design margins and thermal management considerations.

Parameter Comparison

Engineering Selection Recommendations

Selection between the IMS05WDSTR33K40 and IMS5SWDEBR33K65 depends on circuit current requirements and thermal operating conditions:

• Primary Part (IMS05WDSTR33K40): Use when circuit design requires the full 1.9 A current capacity or when lower DC resistance (90 mOhm) is critical for minimizing power dissipation in high-frequency applications.

• Substitute Part (IMS5SWDEBR33K65): Use when circuit current demand does not exceed 1.3 A and when the increased DC resistance (130 mOhm) remains within acceptable power loss budgets. The molded construction of the substitute may provide improved mechanical robustness in vibration-prone environments.

Both parts maintain identical 330 nH inductance and axial through-hole form factor, ensuring direct mechanical and electrical compatibility at the PCB level when current and resistance specifications are satisfied.

Frequently Asked Questions (FAQ)

Q: Can the IMS5SWDEBR33K65 be used as a direct replacement for the IMS05WDSTR33K40?

A: Direct substitution is possible only if circuit design margins permit operation at 1.3 A maximum current and 130 mOhm DC resistance. The inductance value and package form factor are identical, but electrical performance differs. Verify that circuit current does not exceed 1.3 A under any operating condition, including transient events.

Q: What is the impact of increased DC resistance on circuit performance?

A: The 40 mOhm increase in DC resistance (from 90 mOhm to 130 mOhm) results in proportionally higher power dissipation. At 1.3 A, dissipation increases from approximately 152 mW to 220 mW. Thermal management and circuit efficiency calculations must account for this difference.

Q: Are both parts mechanically compatible with existing PCB layouts?

A: Yes. Both parts use identical axial through-hole packaging and shielded construction. PCB footprints, lead spacing, and mounting hole requirements are compatible. No layout modifications are required.

Q: What does "shielded molded" construction mean for the substitute part?

A: The IMS5SWDEBR33K65 uses a molded shielding technique, which encapsulates the inductor core and windings in a protective compound. This differs from the standard shielded construction of the main part but provides equivalent electromagnetic shielding performance and improved mechanical protection.

Q: Can circuit current be temporarily exceeded above 1.3 A when using the substitute?

A: No. The 1.3 A rating is the maximum continuous current specification. Exceeding this value will cause excessive heating and potential component failure. Circuit design must ensure current remains below this limit under all operating conditions.