3483-270M Equivalent & Substitute Parts Reference

Part Overview

The 3483-270M is a 27 µH unshielded drum core wirewound inductor manufactured by API Delevan Inc., rated for 800 mA continuous current with a maximum DC resistance of 240 mOhm. This surface mount component operates across the temperature range of -20°C to 80°C and is specified with ±20% inductance tolerance.

The 3483-270M has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductance value and current rating.

Substiute Parts

3483-270M

API Delevan Inc.In Stock: 11353483-270M Datasheet

Current PartRFQ

SDR0603-270ML

Bourns Inc.In Stock: 1040SDR0603-270ML Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3483-270M are identified based on strict electrical and mechanical parameter alignment. The substitution logic requires:

Primary Matching Criteria:

• Inductance value: 27 µH (exact match required)
• Inductance tolerance: ±20% (matching tolerance band)
• Core type: Ferrite, unshielded drum core wirewound construction
• Mounting: Surface mount technology
• Current rating: Equal to or greater than 800 mA

Secondary Compatibility Factors:

• DC resistance within acceptable operating parameters for the application circuit
• Operating temperature range that encompasses or exceeds -20°C to 80°C
• Package form factor compatible with PCB layout constraints

The SDR0603-270ML from Bourns Inc. meets these substitution criteria. It maintains the identical 27 µH inductance specification, ferrite unshielded drum core construction, and surface mount configuration. While the current rating is 670 mA (lower than the original 800 mA specification), this part is suitable for applications where the actual circuit current demand does not exceed 670 mA. The DC resistance of 300 mOhm is higher than the original 240 mOhm maximum, which must be evaluated against specific circuit power dissipation requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 3483-270M is classified as obsolete, making the SDR0603-270ML a necessary alternative for continued supply. The substitute part is in active production status with established supply chain availability.

Compliance and Certification: The SDR0603-270ML is ROHS3 compliant, meeting current regulatory requirements for electronic components in many markets. The original 3483-270M is RoHS non-compliant, which may present regulatory barriers for new designs or updated production runs.

Electrical Parameter Evaluation: Selection of the SDR0603-270ML requires verification that the application circuit operates at or below 670 mA continuous current. If the design requires the full 800 mA rating of the original part, alternative substitutes must be evaluated. The higher DC resistance (300 mOhm vs. 240 mOhm) will result in increased power dissipation; calculate the additional heat generation to confirm thermal management adequacy.

Physical Form Factor: The SDR0603-270ML is physically smaller (5.80mm x 5.80mm vs. 7.30mm x 7.30mm) and slightly taller (3.90mm vs. 3.50mm). PCB layout must be verified to accommodate these dimensional changes, particularly in space-constrained applications.

Temperature Range: The SDR0603-270ML operates across -40°C to 125°C, which exceeds the original -20°C to 80°C range. This provides additional operational margin for applications subject to extended temperature excursions.

Frequently Asked Questions (FAQ)

Q: Can the SDR0603-270ML be used as a direct replacement for the 3483-270M in all applications?

A: The SDR0603-270ML is electrically compatible for applications where the circuit current does not exceed 670 mA. Physical compatibility must be confirmed through PCB layout review due to dimensional differences. If the original design requires the full 800 mA current rating, the substitute is not suitable without circuit redesign.

Q: What is the impact of the higher DC resistance in the SDR0603-270ML?

A: The SDR0603-270ML has a maximum DC resistance of 300 mOhm compared to 240 mOhm for the 3483-270M. At 670 mA, this results in approximately 134 mW additional power dissipation compared to the original part at the same current. Thermal analysis of the PCB assembly is required to confirm acceptable operating temperatures.

Q: Are there physical footprint compatibility issues?

A: Yes. The SDR0603-270ML (5.80mm x 5.80mm x 3.90mm) is smaller in length and width but taller than the 3483-270M (7.30mm x 7.30mm x 3.50mm). PCB layout must be reviewed to confirm the component fits within the allocated space and that the increased height does not create clearance conflicts with adjacent components or enclosure constraints.

Q: Does the SDR0603-270ML meet current regulatory requirements?

A: Yes. The SDR0603-270ML is ROHS3 compliant, meeting current RoHS Directive requirements. The original 3483-270M is RoHS non-compliant, which may restrict its use in new designs or updated production for regulated markets.

Q: What is the difference in operating temperature range?

A: The SDR0603-270ML operates from -40°C to 125°C, compared to -20°C to 80°C for the 3483-270M. The substitute provides a wider operational envelope, which is beneficial for applications subject to extreme environmental conditions.

Q: How should I verify compatibility before implementing the substitute?

A: Conduct the following verification steps: (1) Confirm the application circuit operates at or below 670 mA continuous current; (2) Calculate power dissipation at the higher DC resistance and verify thermal management; (3) Review PCB layout to confirm physical fit within space constraints; (4) Validate that the wider operating temperature range does not introduce unintended circuit behavior changes.