79F180K-RC Equivalent & Substitute Parts

Part Overview

The Bourns 79F180K-RC is an 18 µH unshielded drum core wirewound inductor rated for 140 mA with a maximum DC resistance of 3.1 Ohm. This through-hole axial component operates across -55°C to 105°C and is designed for applications requiring fixed inductance in compact form factors. The 79F180K-RC is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement.

Substiute Parts

79F180K-RC

Bourns Inc.In Stock: 77979F180K-RC Datasheet

Current PartRFQ

8230-50-RC

Bourns Inc.In Stock: 19058230-50-RC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 79F180K-RC is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Equivalence Criteria:

• Inductance value: 18 µH ±10%
• Core material: Ferrite
• Shielding configuration: Unshielded
• Mounting type: Through hole
• Package type: Axial
• Operating temperature range: -55°C to 105°C
• DC resistance: 3.1 Ohm maximum

Allowable Variation:

• Current rating may exceed the original specification, provided all other parameters remain equivalent
• Physical dimensions may vary within the axial package category
• Q factor and self-resonant frequency may differ due to core geometry changes

The Bourns 8230-50-RC meets all primary equivalence criteria and is classified as an active product, providing superior current handling capability (195 mA versus 140 mA) while maintaining identical inductance, tolerance, DC resistance, and operating temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 8230-50-RC is the qualified substitute for the obsolete 79F180K-RC. Both components maintain identical electrical specifications for inductance (18 µH), tolerance (±10%), and DC resistance (3.1 Ohm maximum). The 8230-50-RC provides increased current rating capacity (195 mA versus 140 mA), which represents a design improvement without compromising compatibility.

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The 8230-50-RC is actively manufactured and stocked, eliminating procurement risk associated with the obsolete 79F180K-RC. The higher self-resonant frequency (32 MHz versus 17 MHz) and improved Q factor (50 versus 40 at 2.5 MHz) of the substitute part provide additional performance margin in high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can the 8230-50-RC directly replace the 79F180K-RC in existing designs?

A: Yes. Both inductors share identical inductance (18 µH), tolerance (±10%), DC resistance (3.1 Ohm), and operating temperature range (-55°C to 105°C). The 8230-50-RC is rated for higher current (195 mA versus 140 mA), making it suitable for all applications where the original part was specified.

Q: What are the physical dimension differences between these parts?

A: The 79F180K-RC measures 0.100" diameter × 0.160" length (2.54mm × 4.06mm). The 8230-50-RC measures 0.120" diameter × 0.300" length (3.05mm × 7.62mm). Both are axial through-hole components; PCB layout verification is required to confirm fit within available space.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8504.50.4000).

Q: Why does the 8230-50-RC have a higher self-resonant frequency?

A: The increased physical dimensions of the 8230-50-RC result in different core geometry, which extends the self-resonant frequency from 17 MHz to 32 MHz. This represents improved high-frequency performance characteristics.

Q: Is the 8230-50-RC available in the same packaging format?

A: The 8230-50-RC is supplied in bulk packaging, whereas the original 79F180K-RC packaging format is not specified in available data. Both components use identical axial through-hole mounting and package type.