78F180J Equivalent & Substitute Parts

Part Overview

The Bourns 78F180J is a 18 µH unshielded drum core wirewound inductor rated for 145 mA with a maximum DC resistance of 1 Ohm. This through-hole axial component operates across a temperature range of -55°C to 105°C and is designed for applications requiring fixed inductance values in the microhenry range.

The 78F180J carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

78F180J

Bourns Inc.In Stock: 113278F180J Datasheet

Current PartRFQ

8230-50-RC

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 78F180J is determined by the following critical parameters:

• Inductance Value: Must be 18 µH to maintain circuit functionality
• Core Type and Shielding: Must be ferrite drum core, unshielded to preserve electromagnetic characteristics
• Mounting and Package: Must be through-hole axial configuration for mechanical compatibility
• Current Rating: Must meet or exceed 145 mA to handle circuit current demands
• DC Resistance: Must not exceed 1 Ohm to maintain acceptable power dissipation characteristics
• Operating Temperature Range: Must support -55°C to 105°C operation
• Frequency Performance: Must maintain Q factor and self-resonant frequency suitable for the intended application frequency

The Bourns 8230-50-RC qualifies as a substitute based on matching inductance value, core material, shielding type, mounting configuration, and operating temperature range. However, variations in current rating, DC resistance, and frequency characteristics must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The 8230-50-RC serves as an active substitute for the obsolete 78F180J. Both components share identical inductance values, core materials, shielding characteristics, and operating temperature ranges, establishing functional equivalence for the primary inductance specification.

The 8230-50-RC provides improved product status as an active component with current manufacturing support and availability. The substitute demonstrates ROHS3 compliance, addressing regulatory requirements that may apply to new designs or production runs.

Differences in DC resistance (3.1 Ohm versus 1 Ohm maximum) and inductance tolerance (±10% versus ±5%) represent measurable deviations. The higher current rating of the 8230-50-RC (195 mA versus 145 mA) provides additional thermal margin. The increased self-resonant frequency (32 MHz versus 15 MHz) extends the frequency range of operation.

Selection of the 8230-50-RC is appropriate where component availability, regulatory compliance, and active product support are prioritized. Circuit designs sensitive to DC resistance values or inductance tolerance specifications require detailed analysis of the parameter differences against application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 8230-50-RC directly replace the 78F180J in existing designs?

A: Both components share the same inductance value, core material, shielding type, mounting configuration, and operating temperature range. Direct mechanical and electrical substitution is possible. However, the higher DC resistance of the 8230-50-RC (3.1 Ohm maximum versus 1 Ohm maximum) and wider inductance tolerance (±10% versus ±5%) must be evaluated against circuit performance requirements.

Q: What are the key differences between these two inductors?

A: The primary differences are DC resistance, inductance tolerance, current rating, and self-resonant frequency. The 78F180J offers lower DC resistance and tighter tolerance. The 8230-50-RC provides higher current capacity and extended frequency range. Both maintain identical inductance values and operating temperature specifications.

Q: Why is the 78F180J listed as obsolete?

A: The 78F180J carries obsolete product status, indicating discontinued manufacturing. The 8230-50-RC represents an active alternative from the same manufacturer with equivalent core specifications and improved regulatory compliance.

Q: Are there packaging differences between these components?

A: Both components use through-hole axial packaging. Physical dimensions differ slightly: the 78F180J measures 0.110" diameter by 0.280" length, while the 8230-50-RC measures 0.120" diameter by 0.300" length. These dimensional variations require verification against PCB layout constraints.

Q: Does the 8230-50-RC meet current regulatory requirements?

A: The 8230-50-RC is ROHS3 compliant, addressing current regulatory standards. The 78F180J is RoHS non-compliant. For applications subject to RoHS requirements, the 8230-50-RC provides compliance support.