73F104AF-RC Equivalent & Substitute Parts

Part Overview

The 73F104AF-RC is a 100 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 250 mA with a maximum DC resistance of 2Ohm. This through-hole axial component operates across a temperature range of -55°C to 105°C and is ROHS3 compliant. The product is currently obsolete, making equivalent substitutes necessary for ongoing design requirements and component sourcing.

Substiute Parts

73F104AF-RC

Bourns Inc.In Stock: 89573F104AF-RC Datasheet

Current PartRFQ

1532H

Hammond ManufacturingIn Stock: 12551532H Datasheet

SimilarRFQ

2890R-42J

API Delevan Inc.In Stock: 8902890R-42J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 73F104AF-RC is determined by the following critical parameters:

• Inductance value: 100 µH (exact match required)
• Mounting type: Through hole axial configuration
• Shielding: Unshielded
• Operating temperature range compatibility
• Current rating and DC resistance within acceptable circuit tolerances
• RoHS3 compliance and regulatory alignment

The two identified substitutes—Hammond Manufacturing 1532H and API Delevan Inc. 2890R-42J—maintain the core inductance specification and through-hole axial form factor. Both are active products with current manufacturing status and full regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

1532H (Hammond Manufacturing)

The 1532H provides higher current capacity (400 mA versus 250 mA) with increased DC resistance (3Ohm Max). This substitute is suitable for applications where the original 250 mA rating provides design margin. The ±10% tolerance is broader than the original ±5%, which may impact circuits requiring tighter inductance control. Hammond Manufacturing maintains active production status with ROHS3 compliance.

2890R-42J (API Delevan Inc.)

The 2890R-42J maintains the original ±5% tolerance and operates within the same temperature range (-55°C ~ 105°C). Current rating (279 mA) and DC resistance (2.5Ohm Max) are closer to the original specification than the Hammond alternative. This molded inductor with iron core construction is actively manufactured and fully ROHS3 compliant. The higher self-resonant frequency (12MHz) provides extended frequency performance compared to the original 7.7MHz.

Both substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 1532H replace the 73F104AF-RC in all applications?

A: The 1532H maintains the 100 µH inductance and through-hole axial form factor. However, the increased DC resistance (3Ohm Max versus 2Ohm Max) and broader tolerance (±10% versus ±5%) may affect circuits with tight impedance or inductance specifications. Current capacity is higher, providing design margin in this parameter.

Q: What is the primary difference between the 1532H and 2890R-42J substitutes?

A: The 2890R-42J more closely matches the original specification with ±5% tolerance and 2.5Ohm Max DC resistance. The 1532H offers higher current capacity (400 mA) but with increased DC resistance and broader tolerance. Core material differs: the 2890R-42J uses iron core construction versus the original ferrite drum core.

Q: Are both substitutes physically compatible with the original PCB layout?

A: All three components use through-hole axial packaging. Physical dimensions vary slightly: the 73F104AF-RC measures 0.330" Dia x 0.625" L, the 1532H measures 0.290" Dia x 0.875" L, and the 2890R-42J measures 0.280" Dia x 0.900" L. PCB hole spacing and component clearance must be verified for each substitute.

Q: Do both substitutes meet the same regulatory requirements as the original?

A: Yes. Both the 1532H and 2890R-42J are ROHS3 compliant, REACH unaffected, and classified under the same HTSUS code (8504.50.8000) as the original 73F104AF-RC.

Q: Which substitute should be selected for frequency-sensitive applications?

A: The 2890R-42J has a higher self-resonant frequency (12MHz) compared to the original (7.7MHz), providing better performance at higher frequencies. The 1532H also reaches 12MHz self-resonant frequency. For applications operating near the original 7.7MHz resonance point, circuit behavior may differ with either substitute.