Bourns 8105 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8105 is a 7 mH, 2-line common mode choke designed for through-hole mounting with a maximum current rating of 2.8A and DC resistance of 120mOhm. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 8105 operates across a temperature range of -55°C to 105°C and is packaged in a vertical, 4-pin configuration with dimensions of 1.200" L x 0.600" W (30.48mm x 15.24mm).

Substiute Parts

8105

Bourns Inc.In Stock: 7218105 Datasheet

Current PartRFQ

8105-RC

Bourns Inc.In Stock: 10158105-RC Datasheet

DirectRFQ

CMT-8105

Triad MagneticsIn Stock: 738CMT-8105 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 8105 are qualified based on the following critical parameters:

• Inductance value: 7 mH @ 1 kHz
• Number of lines: 2-line configuration
• Current rating: 2.8A maximum
• DC resistance: 120mOhm maximum
• Operating temperature range: -55°C ~ 105°C
• Mounting type: Through hole
• Physical dimensions: 1.200" L x 0.600" W (30.48mm x 15.24mm)
• Package configuration: Vertical, 4-pin

The substitute parts identified maintain electrical equivalence across these core parameters. Variations in product status, RoHS compliance, and voltage ratings are noted where applicable but do not affect functional substitutability for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete Bourns 8105, the Bourns 8105-RC is the direct replacement. Both parts are manufactured by Bourns Inc. and maintain identical electrical and mechanical specifications. The 8105-RC is actively produced and carries ROHS3 compliance, addressing regulatory requirements for new designs.

The Triad Magnetics CMT-8105 provides an alternative from a different manufacturer while maintaining all core electrical parameters. This part includes additional certifications (CSA, IEC, UL, VDE) and specifies an AC voltage rating of 1500V, which may be advantageous in applications requiring enhanced isolation specifications. The CMT-8105 is also ROHS3 compliant and actively produced.

Selection between the Bourns 8105-RC and Triad Magnetics CMT-8105 should be based on supply chain considerations, certification requirements specific to the application, and any existing design qualifications for either manufacturer's components.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 8105-RC directly replace the obsolete Bourns 8105?

A: Yes. The 8105-RC maintains identical inductance (7 mH @ 1 kHz), current rating (2.8A), DC resistance (120mOhm), operating temperature range (-55°C ~ 105°C), and physical dimensions (1.200" L x 0.600" W). The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What are the key differences between the Bourns 8105-RC and Triad Magnetics CMT-8105?

A: Both parts are electrically equivalent across all core parameters. The CMT-8105 includes additional certifications (CSA, IEC, UL, VDE) and specifies an AC voltage rating of 1500V. The CMT-8105 is manufactured by Triad Magnetics rather than Bourns Inc.

Q: Are there any mechanical compatibility concerns when substituting these parts?

A: No. All three parts share identical mounting type (through hole), physical dimensions (1.200" L x 0.600" W), height (1.200"), and package configuration (vertical, 4-pin). Direct board-level substitution is supported without layout modifications.

Q: Which substitute part should be selected for new designs?

A: For new designs, either the Bourns 8105-RC or Triad Magnetics CMT-8105 is appropriate. Both are actively produced and ROHS3 compliant. Selection should consider existing supplier relationships, certification requirements, and any design qualifications already established for either manufacturer.

Q: Does the AC voltage rating specified for the CMT-8105 affect substitutability?

A: The AC voltage rating of 1500V specified for the CMT-8105 represents an additional specification not stated for the Bourns parts. This does not prevent substitution but may provide additional margin in applications requiring isolation specifications.