Bourns 8104 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8104 is a 10 mH, 2-line common mode choke designed for through-hole mounting with a maximum current rating of 2.4A and DC resistance of 170mOhm. The main part (8104) is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. Active alternatives are available that maintain electrical and mechanical compatibility while offering improved compliance status.

Substiute Parts

8104

Bourns Inc.In Stock: 11088104 Datasheet

Current PartRFQ

8104-RC

Bourns Inc.In Stock: 12148104-RC Datasheet

DirectRFQ

CMT-8104

Triad MagneticsIn Stock: 1046CMT-8104 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Bourns 8104 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance: 10 mH @ 1 kHz
• Number of Lines: 2
• Current Rating: 2.4A maximum
• DC Resistance: 170mOhm maximum
• Mounting Type: Through Hole
• Physical Dimensions: 1.200" L x 0.600" W (30.48mm x 15.24mm)
• Package Configuration: Vertical, 4 PC Pin
• Operating Temperature Range: -55°C ~ 105°C

Substitute Categories:

Direct Substitute (Bourns 8104-RC): Identical electrical specifications and mechanical form factor. Differs only in packaging format (Bulk vs. standard) and compliance status (ROHS3 Compliant vs. RoHS non-compliant). Product status is Active.

Similar Substitute (Triad Magnetics CMT-8104): Matches all critical electrical and mechanical parameters. Manufactured by alternative supplier. Includes additional AC voltage rating (1500V) and expanded approval certifications (CSA, IEC, UL, VDE). Product status is Active.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Manufacturer): The Bourns 8104-RC is the primary substitute for the obsolete Bourns 8104. Both parts are manufactured by Bourns Inc. and share identical electrical and mechanical specifications. The 8104-RC offers the advantage of Active product status and ROHS3 compliance, making it suitable for new designs and production environments with RoHS requirements.

For Alternative Manufacturer Selection: The Triad Magnetics CMT-8104 provides an equivalent substitute with Active product status and ROHS3 compliance. This part includes additional certifications (CSA, IEC, UL, VDE) and an AC voltage rating specification (1500V), which may be beneficial for applications requiring enhanced regulatory documentation or AC isolation specifications. The CMT-8104 maintains all critical electrical and mechanical parameters required for functional equivalence.

Compliance Considerations: Both substitute parts (8104-RC and CMT-8104) are ROHS3 compliant, addressing the RoHS non-compliance status of the original 8104. Selection between these substitutes should be based on supply chain preferences, certification requirements, and any specific regulatory mandates applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 8104-RC be used as a direct replacement for the Bourns 8104? A: Yes. The 8104-RC maintains identical electrical specifications (10 mH @ 1 kHz, 2.4A, 170mOhm DCR) and mechanical form factor (through-hole, vertical 4-pin package, 30.48mm x 15.24mm). The primary differences are packaging format and compliance status (ROHS3 Compliant vs. RoHS non-compliant).

Q: What are the key differences between the Bourns 8104-RC and Triad Magnetics CMT-8104? A: Both parts match the critical electrical parameters (10 mH inductance, 2.4A current rating, 170mOhm DCR) and mechanical dimensions. The CMT-8104 differs in that it includes an AC voltage rating (1500V) and expanded approval certifications (CSA, IEC, UL, VDE). Both are ROHS3 compliant and Active products.

Q: Are the physical dimensions identical across all three parts? A: Yes. The Bourns 8104, Bourns 8104-RC, and Triad Magnetics CMT-8104 all share the same through-hole mounting configuration with dimensions of 1.200" L x 0.600" W (30.48mm x 15.24mm) and maximum height of 1.200" (30.48mm).

Q: Which substitute should be selected for new product designs? A: Either the Bourns 8104-RC or Triad Magnetics CMT-8104 is appropriate for new designs. The 8104-RC maintains the original manufacturer continuity, while the CMT-8104 offers additional certifications and AC voltage specifications. Selection depends on supply chain strategy and specific regulatory requirements.

Q: Is the operating temperature range the same for all substitute parts? A: Yes. All three parts operate across the same temperature range of -55°C to 105°C.

Q: What is the significance of the ROHS3 compliance on the substitute parts? A: ROHS3 compliance indicates adherence to the Restriction of Hazardous Substances Directive, which restricts the use of specific hazardous materials in electrical and electronic equipment. The original 8104 is RoHS non-compliant, while both substitutes (8104-RC and CMT-8104) are ROHS3 compliant, making them suitable for applications with RoHS regulatory requirements.