Bourns 8109 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8109 is a 30 mH, 2-line common mode choke designed for through-hole mounting applications requiring 2.3A maximum current handling. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing production support and design continuity. The 8109-RC represents the active production equivalent with identical electrical and mechanical specifications.

Substiute Parts

8109

Bourns Inc.In Stock: 10038109 Datasheet

Current PartRFQ

8109-RC

Bourns Inc.In Stock: 10478109-RC Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 8109 is determined by strict equivalence across the following critical parameters:

• Inductance value: 30 mH @ 1 kHz
• Line configuration: 2-line common mode choke
• Current rating: 2.3A maximum
• DC resistance: 330mOhm maximum
• Mounting configuration: Through-hole, vertical orientation
• Physical dimensions: 1.350" L x 0.800" W x 1.450" H maximum
• Pin configuration: 4 PC pin package

The 8109-RC qualifies as a direct substitute based on complete alignment with all electrical and mechanical parameters. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 8109-RC is the direct functional equivalent for applications currently using the obsolete 8109. Selection between these parts is determined by regulatory and compliance requirements:

For new designs or production requiring RoHS3 compliance, the 8109-RC is the appropriate selection. The active product status of the 8109-RC ensures ongoing availability and manufacturing support.

For legacy systems where RoHS non-compliance is acceptable and existing inventory of the 8109 remains available, continued use of the original part is permissible. However, transition planning to the 8109-RC is recommended to avoid future supply chain disruption.

Both parts are REACH Unaffected and classified under ECCN EAR99, with identical electrical performance and mechanical fit characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 8109-RC be used as a direct replacement for the 8109 in existing designs?

A: Yes. The 8109-RC provides identical electrical specifications (30 mH inductance, 2.3A current rating, 330mOhm DCR) and mechanical dimensions (1.350" L x 0.800" W x 1.450" H). Pin configuration and mounting type are unchanged. No circuit redesign is required.

Q: What is the primary difference between the 8109 and 8109-RC?

A: The 8109-RC is the active production equivalent with ROHS3 compliance certification. The original 8109 is obsolete and RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: The 8109 is supplied in standard packaging, while the 8109-RC is supplied in bulk packaging. Both use the same Vertical, 4 PC Pin package configuration. Bulk packaging does not affect component performance or compatibility.

Q: What compliance certifications apply to these parts?

A: Both parts are REACH Unaffected and classified as EAR99 for export control purposes. The 8109-RC carries ROHS3 compliance; the 8109 does not. Both operate across the -55°C to 105°C temperature range.

Q: Is the 8109-RC suitable for high-reliability applications?

A: Both parts share identical electrical and thermal specifications. Selection should be based on specific application compliance requirements and supply chain considerations. The active status of the 8109-RC provides assurance of continued manufacturing support.