73F333AF-RC Equivalent & Substitute Parts

Part Overview

The 73F333AF-RC is a 3.3 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 125 mA maximum current with 15.1Ohm DC resistance. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 105°C and is ROHS3 compliant.

Substiute Parts

73F333AF-RC

Bourns Inc.In Stock: 119173F333AF-RC Datasheet

Current PartRFQ

AIAP-02-332K

Abracon LLCIn Stock: 885AIAP-02-332K Datasheet

SimilarRFQ

B82145A1335J000

EPCOS - TDK ElectronicsIn Stock: 4688B82145A1335J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 73F333AF-RC is determined by the following critical parameters:

• Inductance Value: Must be 3.3 mH (±10% tolerance acceptable for active alternatives)
• Current Rating: Substitute must support minimum 125 mA; higher ratings are acceptable
• Mounting Type: Through Hole axial configuration required
• Shielding: Unshielded specification maintained
• DC Resistance: Lower DCR values improve performance; values up to 15.1Ohm are acceptable
• Operating Temperature Range: Must encompass or exceed -55°C to 105°C minimum
• RoHS Compliance: ROHS3 compliance required

Two active substitutes meet these criteria: B82145A1335J000 (EPCOS - TDK Electronics) and AIAP-02-332K (Abracon LLC).

Parameter Comparison

Engineering Selection Recommendations

B82145A1335J000 (EPCOS - TDK Electronics) is the primary substitute. This part maintains ferrite drum core construction identical to the original, provides ±5% tolerance matching the 73F333AF-RC, and extends the operating temperature range to -55°C to 125°C. The 200 mA current rating exceeds the 125 mA requirement with improved DC resistance of 12.5Ohm. ROHS3 compliance and active product status ensure long-term availability. The part is available in Cut Tape packaging with 4579 units in stock.

AIAP-02-332K (Abracon LLC) serves as a secondary substitute for applications where lower DC resistance (6.56Ohm) is beneficial. This part supports 220 mA current rating and maintains unshielded axial configuration. However, the ±10% inductance tolerance is wider than the original specification, and the operating temperature range (-40°C to 85°C) does not extend to the full -55°C lower limit. ROHS3 compliance and active status are confirmed. The part is available in Bulk packaging with 866 units in stock.

Frequently Asked Questions (FAQ)

Q: Can B82145A1335J000 directly replace 73F333AF-RC in all applications?

A: Yes, for applications operating within -55°C to 105°C. The B82145A1335J000 maintains identical inductance (3.3 mH), matching tolerance (±5%), and ferrite drum core construction. The improved current rating (200 mA vs. 125 mA) and lower DC resistance (12.5Ohm vs. 15.1Ohm) provide performance benefits. Physical dimensions differ slightly (6.50mm x 12.00mm vs. 12.70mm x 15.88mm), requiring PCB layout verification.

Q: Is AIAP-02-332K suitable for high-reliability applications?

A: AIAP-02-332K is suitable for applications where operating temperature does not fall below -40°C. The wider inductance tolerance (±10%) may impact circuit performance in precision applications. The significantly lower DC resistance (6.56Ohm) reduces power dissipation compared to the original part.

Q: What are the physical dimension differences between substitutes?

A: The 73F333AF-RC measures 12.70mm diameter x 15.88mm length. B82145A1335J000 measures 6.50mm diameter x 12.00mm length. AIAP-02-332K measures 6.40mm diameter x 14.00mm length. PCB footprint and mounting hole spacing must be verified before substitution.

Q: Are all substitutes ROHS3 compliant?

A: Yes. Both B82145A1335J000 and AIAP-02-332K are ROHS3 compliant. The original 73F333AF-RC is also ROHS3 compliant.

Q: Which substitute has the best long-term availability?

A: B82145A1335J000 (EPCOS - TDK Electronics) is recommended for long-term availability. It maintains active product status with 4579 units in current stock, compared to AIAP-02-332K with 866 units. EPCOS - TDK Electronics is a major inductor manufacturer with established supply chain infrastructure.