73F473AF-RC Equivalent & Substitute Parts

Part Overview

The 73F473AF-RC is a 4.7 mH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 100 mA maximum current with 21.5Ohm DC resistance. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in the millihenry range.

The 73F473AF-RC is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and new designs requiring compatible inductance characteristics.

Substiute Parts

73F473AF-RC

Bourns Inc.In Stock: 116973F473AF-RC Datasheet

Current PartRFQ

AIAP-02-472K

Abracon LLCIn Stock: 4416AIAP-02-472K Datasheet

SimilarRFQ

B82145A1475J000

EPCOS - TDK ElectronicsIn Stock: 13948B82145A1475J000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 73F473AF-RC must satisfy the following core electrical and mechanical criteria:

• Inductance value of 4.7 mH (primary functional requirement)
• Unshielded configuration
• Through-hole axial mounting
• Current rating equal to or greater than 100 mA
• DC resistance compatible with circuit design requirements
• RoHS3 compliance for regulatory alignment

The two identified substitutes meet these criteria with variations in current rating, DC resistance, and operating temperature range. Both maintain the 4.7 mH inductance specification and axial through-hole form factor required for direct replacement consideration.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with current manufacturing status, addressing the obsolescence of the 73F473AF-RC.

AIAP-02-472K (Abracon LLC) provides higher current capacity (180 mA vs. 100 mA) and lower DC resistance (9.66Ohm vs. 21.5Ohm). This part is suitable for applications where reduced power dissipation is beneficial. Operating temperature range is -40°C to 85°C, which is narrower than the original part. Inductance tolerance is ±10%, compared to ±5% for the original.

B82145A1475J000 (EPCOS - TDK Electronics) maintains the ±5% inductance tolerance matching the original specification and supports higher current (170 mA vs. 100 mA) with lower DC resistance (18Ohm vs. 21.5Ohm). Operating temperature range extends to 125°C maximum, exceeding the original part's 105°C limit. This part is REACH Affected, whereas the original is REACH Unaffected.

Selection between substitutes depends on specific circuit requirements for current capacity, DC resistance impact, temperature operating range, and tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can AIAP-02-472K or B82145A1475J000 be used as direct replacements for 73F473AF-RC?

A: Both parts share the same 4.7 mH inductance value, unshielded configuration, and through-hole axial mounting. Direct substitution is mechanically and electrically feasible. However, differences in DC resistance, current rating, and operating temperature range must be evaluated against specific circuit requirements.

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

A: The 73F473AF-RC has 21.5Ohm maximum DC resistance. AIAP-02-472K offers 9.66Ohm and B82145A1475J000 offers 18Ohm. Lower DC resistance reduces power dissipation and heat generation. Circuit designs sensitive to inductor losses should account for these differences.

Q: How do inductance tolerance differences affect circuit performance?

A: The 73F473AF-RC and B82145A1475J000 both specify ±5% tolerance, while AIAP-02-472K specifies ±10%. Applications requiring tighter inductance accuracy should prioritize parts with ±5% tolerance.

Q: Are there operating temperature limitations with these substitutes?

A: The 73F473AF-RC operates from -55°C to 105°C. AIAP-02-472K operates from -40°C to 85°C, which is more restrictive at both temperature extremes. B82145A1475J000 operates from -55°C to 125°C, providing extended high-temperature capability. Select based on application temperature requirements.

Q: What are the packaging and inventory considerations?

A: AIAP-02-472K is supplied in Bulk packaging with 4346 pieces in stock. B82145A1475J000 is supplied in Cut Tape (CT) packaging with 13907 pieces in stock. Both are active products with established supply chains, unlike the obsolete 73F473AF-RC.