73F183AF-RC Equivalent & Substitute Parts

Part Overview

The 73F183AF-RC is a 1.8 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 150 mA maximum current with 11 Ohm DC resistance. This through-hole axial component operates across -55°C to 105°C and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

73F183AF-RC

Bourns Inc.In Stock: 79473F183AF-RC Datasheet

Current PartRFQ

4590R-185J

API Delevan Inc.In Stock: 9904590R-185J Datasheet

SimilarRFQ

AIAP-01-182K-T

Abracon LLCIn Stock: 10345AIAP-01-182K-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 73F183AF-RC is determined by the following critical parameters:

• Inductance Value: Must be 1.8 mH (±5% tolerance acceptable)
• Mounting Type: Must be through-hole axial configuration
• Core Construction: Ferrite or equivalent unshielded drum core wirewound design
• Current Rating: Must support minimum 150 mA operation
• DC Resistance: Lower DCR values are acceptable; higher values require circuit analysis
• Operating Temperature: Must cover at least the -55°C to 105°C range or be compatible with application requirements
• Regulatory Compliance: ROHS3 compliance required for modern applications

The identified substitute parts meet these core substitution criteria while offering improved current handling or alternative packaging options.

Parameter Comparison

Engineering Selection Recommendations

4590R-185J (API Delevan Inc.) is the primary substitute for applications requiring direct performance enhancement. This part maintains identical inductance and tolerance specifications while providing significantly improved current handling (665 mA versus 150 mA) and reduced DC resistance (1.5 Ohm versus 11 Ohm). The extended operating temperature range (-55°C to 125°C) provides additional thermal margin. Active product status ensures long-term availability and supply chain stability. Physical dimensions differ (0.455" Dia x 0.900" L), requiring PCB layout verification.

AIAP-01-182K-T (Abracon LLC) serves as an alternative for space-constrained applications. This part offers the smallest physical footprint (0.130" Dia x 0.360" L) among the three options, making it suitable for compact designs. However, the current rating (120 mA) falls below the original specification, and DC resistance is higher (14 Ohm). The inductance tolerance is wider (±10% versus ±5%), and the operating temperature minimum is higher (-40°C versus -55°C). Active product status and high inventory availability support procurement reliability.

Both substitute parts maintain ROHS3 compliance and unshielded axial configuration compatibility with the original design. Selection between substitutes depends on circuit current requirements, thermal constraints, and available PCB space.

Frequently Asked Questions (FAQ)

Q: Can the 4590R-185J directly replace the 73F183AF-RC in all applications?

A: The 4590R-185J maintains the same inductance value and tolerance, unshielded configuration, and axial through-hole mounting. However, physical dimensions differ significantly (0.455" Dia x 0.900" L versus 0.610" Dia x 0.625" L). PCB layout and mechanical clearance must be verified before substitution. The improved current rating and reduced DC resistance are beneficial for most applications but may require circuit analysis if the original design relied on specific impedance characteristics.

Q: Is the AIAP-01-182K-T suitable for high-current applications?

A: No. The AIAP-01-182K-T is rated for 120 mA maximum current, which is below the original 73F183AF-RC specification of 150 mA. This part is suitable only for applications operating at or below 120 mA. The higher DC resistance (14 Ohm) also increases power dissipation compared to the original part.

Q: What are the key differences in operating temperature ranges?

A: The 73F183AF-RC operates from -55°C to 105°C. The 4590R-185J extends the upper limit to 125°C, providing additional thermal headroom. The AIAP-01-182K-T has a higher minimum temperature (-40°C versus -55°C), which may be limiting for applications requiring full low-temperature operation.

Q: How do inductance tolerances affect circuit performance?

A: The 73F183AF-RC and 4590R-185J both specify ±5% inductance tolerance. The AIAP-01-182K-T specifies ±10% tolerance, which represents a wider variation band. For circuits sensitive to inductance accuracy, the wider tolerance may require additional design margin or component selection.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both the 4590R-185J and AIAP-01-182K-T are ROHS3 compliant, matching the original 73F183AF-RC specification. All three parts are suitable for applications requiring regulatory compliance with ROHS3 standards.

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

A: The 4590R-185J offers significantly lower DC resistance (1.5 Ohm versus 11 Ohm), reducing resistive losses and heat generation. The AIAP-01-182K-T has higher DC resistance (14 Ohm), increasing power dissipation. DC resistance affects circuit Q factor, insertion loss, and thermal performance. Applications with tight power budgets or high-frequency operation should account for these differences.