73F824AF-RC Equivalent & Substitute Parts

Part Overview

The 73F824AF-RC is an 820 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 200 mA maximum current with 6.8Ohm DC resistance. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a temperature range of -55°C to 105°C and meets ROHS3 compliance standards.

Key Parameters

Parameter	Value
Inductance	820 µH
Inductance Tolerance	±5%
Current Rating	200 mA
DC Resistance (DCR)	6.8Ohm Max
Core Type	Drum Core, Wirewound
Shielding	Unshielded
Mounting Type	Through Hole
Package	Axial
Operating Temperature	-55°C ~ 105°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 73F824AF-RC is determined by the following critical parameters:

Inductance value: 820 µH (exact match required)
Inductance tolerance: ±5% or tighter
Current rating: minimum 200 mA
DC resistance: 6.8Ohm or lower
Core material: Ferrite
Shielding: Unshielded
Mounting type: Through Hole
Package: Axial
Operating temperature range: must encompass -55°C to 105°C or provide equivalent coverage

The substitute parts listed below meet these electrical and mechanical criteria and are classified as active products with current manufacturing availability.

Parameter Comparison

Parameter	73F824AF-RC (Bourns)	2256R-36J (API Delevan)	AIAP-01-821K-T (Abracon)
Inductance	820 µH	820 µH	820 µH
Inductance Tolerance	±5%	±5%	±10%
Current Rating (Amps)	200 mA	260 mA	170 mA
DC Resistance (DCR)	6.8Ohm Max	6.04Ohm Max	7.1Ohm Max
Core Type	Drum Core, Wirewound	Molded	Wirewound
Shielding	Unshielded	Unshielded	Unshielded
Operating Temperature	-55°C ~ 105°C	-55°C ~ 125°C	-40°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are classified as active products with current manufacturing support, addressing the obsolescence status of the 73F824AF-RC.

The 2256R-36J (API Delevan Inc.) provides the closest electrical match with 260 mA current rating capability, exceeding the original 200 mA requirement, and delivers superior DC resistance at 6.04Ohm maximum. This part extends the operating temperature range to 125°C and maintains ±5% inductance tolerance. Packaging is supplied in Tape & Reel format.

The AIAP-01-821K-T (Abracon LLC) offers wirewound construction matching the original design approach. Current rating is 170 mA, which falls below the original 200 mA specification. DC resistance is 7.1Ohm maximum, exceeding the original specification. Operating temperature range is -40°C to 105°C, which does not extend to the lower -55°C limit. Inductance tolerance is ±10%, wider than the original ±5%. This part is supplied in Cut Tape packaging.

Both substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 2256R-36J directly replace the 73F824AF-RC?

A: The 2256R-36J meets all critical electrical parameters for substitution. It provides 820 µH inductance at ±5% tolerance, supports 260 mA current (exceeding the 200 mA requirement), and delivers 6.04Ohm DC resistance (lower than the 6.8Ohm maximum). Operating temperature range extends to 125°C, covering the original -55°C to 105°C specification. Physical package is axial through-hole, matching the original. This part is suitable for direct substitution in applications where the original 73F824AF-RC was specified.

Q: What are the limitations of the AIAP-01-821K-T as a substitute?

A: The AIAP-01-821K-T has three parameter deviations from the original specification. Current rating is 170 mA, which is below the original 200 mA requirement and may not be suitable for circuits designed to operate at or near the original current limit. DC resistance is 7.1Ohm maximum, exceeding the original 6.8Ohm specification, which may affect circuit performance in applications sensitive to inductor resistance. Operating temperature minimum is -40°C, which does not reach the original -55°C lower limit. Inductance tolerance is ±10%, wider than the original ±5%. This part should be selected only when these deviations are acceptable for the application.

Q: How do the core types differ between these inductors?

A: The original 73F824AF-RC uses drum core wirewound construction. The 2256R-36J uses molded construction, which typically provides better mechanical stability and environmental protection. The AIAP-01-821K-T uses wirewound construction, matching the original design approach. Core type selection depends on application requirements for mechanical robustness, thermal performance, and environmental exposure.

Q: What packaging formats are available?

A: The 73F824AF-RC is supplied in standard through-hole axial package. The 2256R-36J is supplied in Tape & Reel (TR) format, suitable for automated assembly. The AIAP-01-821K-T is supplied in Cut Tape (CT) format. Packaging selection depends on production volume and assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. Both the 2256R-36J and AIAP-01-821K-T are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 73F824AF-RC.

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