Bourns 8119 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8119 is a 4 mH, 2-line common mode choke designed for through-hole mounting applications requiring 14.5A current handling capability. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications. The 8119 series provides electromagnetic interference filtering in power distribution and signal conditioning circuits where dual-line common mode suppression is required.

Substiute Parts

8119

Bourns Inc.In Stock: 6998119 Datasheet

Current PartRFQ

8119-RC

Bourns Inc.In Stock: 9808119-RC Datasheet

DirectRFQ

CMT-8119

Triad MagneticsIn Stock: 8345CMT-8119 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Bourns 8119 common mode choke is determined by strict equivalence across the following critical parameters:

• Inductance value: 4 mH @ 1 kHz
• Number of lines: 2
• Current rating: 14.5A minimum
• DC resistance: 12mOhm maximum
• Mounting configuration: Through hole, vertical 4-pin package
• Physical dimensions: 1.700" L x 0.900" W, 1.650" height maximum
• Operating temperature range: -55°C ~ 105°C

Parts meeting all these criteria are classified as direct functional equivalents. Substitute parts are grouped by manufacturer and product status to facilitate component selection based on availability and compliance requirements.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete Bourns 8119, the Bourns 8119-RC is the primary direct replacement. Both components are manufactured by Bourns Inc. and maintain identical electrical and mechanical specifications. The 8119-RC is actively produced and carries ROHS3 compliance, addressing regulatory requirements for new designs and production continuity.

The Triad Magnetics CMT-8119 provides an alternative cross-manufacturer substitute meeting all core electrical parameters. This component offers additional certifications (CSA, IEC, UL, VDE) and specifies AC voltage rating of 1500V, providing enhanced documentation for applications requiring formal approval agency compliance. The CMT-8119 is actively produced with high inventory availability.

Selection between the Bourns 8119-RC and Triad Magnetics CMT-8119 should be based on supply chain requirements, existing qualification documentation, and any manufacturer-specific design constraints within the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 8119-RC directly replace the obsolete Bourns 8119?

A: Yes. The 8119-RC maintains identical inductance (4 mH @ 1 kHz), current rating (14.5A), DC resistance (12mOhm), physical dimensions, and operating temperature range. The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What are the key differences between Bourns 8119-RC and Triad Magnetics CMT-8119?

A: Both parts meet identical electrical specifications and physical dimensions. The CMT-8119 provides additional certifications (CSA, IEC, UL, VDE) and specifies AC voltage rating (1500V). Packaging differs: 8119-RC is supplied in bulk; CMT-8119 is also supplied in bulk. Selection depends on certification requirements and supply chain preferences.

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

A: No. All three parts share identical mounting type (through hole), package configuration (vertical 4-pin), and physical dimensions (1.700" L x 0.900" W, 1.650" height). Direct board-level substitution is mechanically feasible without layout modifications.

Q: Does the AC voltage rating difference affect substitution suitability?

A: The CMT-8119 specifies 1500V AC rating; the Bourns parts do not specify AC voltage. For applications requiring documented AC voltage performance, the CMT-8119 provides explicit certification. For DC-dominant or unspecified AC applications, all three parts are electrically equivalent based on provided parameters.

Q: What inventory considerations apply to these substitutes?

A: Bourns 8119 (obsolete): 672 pcs available. Bourns 8119-RC (active): 949 pcs available. Triad Magnetics CMT-8119 (active): 8329 pcs available. For long-term production requirements, the CMT-8119 offers the highest inventory position.