Bourns 8115 Common Mode Choke - Equivalent & Substitute Parts

Part Overview

The Bourns 8115 is a 1.2 mH, 2-line common mode choke designed for through-hole mounting with a 16A current rating and 6mOhm DC resistance. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 8115 operates across a temperature range of -55°C to 105°C and is packaged in a vertical 4-pin configuration.

Key Parameters

Parameter	Value
Inductance @ Frequency	1.2 mH @ 1 kHz
Number of Lines	2
Current Rating (Max)	16A
DC Resistance (DCR) (Max)	6mOhm
Operating Temperature	-55°C ~ 105°C
Mounting Type	Through Hole
Package / Case	Vertical, 4 PC Pin
Height (Max)	1.530" (38.86mm)

Substitute Part Grouping Explanation

Substitute parts for the Bourns 8115 are qualified based on the following critical parameters:

Inductance value: 1.2 mH @ 1 kHz
Number of lines: 2-line configuration
Current rating: 16A minimum
DC resistance: 6mOhm maximum
Mounting type: Through hole
Package configuration: Vertical, 4-pin
Physical height: 1.530" (38.86mm) maximum
Operating temperature range: -55°C ~ 105°C

Parts meeting these electrical and mechanical specifications are classified as direct or similar substitutes. Variations in RoHS compliance, voltage ratings, and certifications do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Parameter	Bourns 8115	Bourns 8115-RC	Triad CMT-8115
Manufacturer	Bourns Inc.	Bourns Inc.	Triad Magnetics
Product Status	Obsolete	Active	Active
Inductance @ Frequency	1.2 mH @ 1 kHz	1.2 mH @ 1 kHz	1.2 mH @ 1 kHz
Number of Lines	2	2	2
Current Rating (Max)	16A	16A	16A
DC Resistance (DCR) (Max)	6mOhm	6mOhm	6mOhm
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole
Size / Dimension	1.450" L x 0.800" W (36.83mm x 20.32mm)	1.500" L x 0.800" W (38.10mm x 20.32mm)	1.500" L x 0.800" W (38.10mm x 20.32mm)
Height (Max)	1.530" (38.86mm)	1.530" (38.86mm)	1.530" (38.86mm)
Package / Case	Vertical, 4 PC Pin	Vertical, 4 PC Pin	Vertical, 4 PC Pin
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Voltage Rating - AC	Not specified	Not specified	1500V (1.5kV)
Approval Agency	Not specified	Not specified	CSA, IEC, UL, VDE

Engineering Selection Recommendations

The Bourns 8115-RC is the primary substitute for the obsolete Bourns 8115. Both components are manufactured by Bourns Inc. and share identical electrical specifications. The 8115-RC is currently in active production status and maintains ROHS3 compliance, making it suitable for new designs and production environments with RoHS requirements.

The Triad Magnetics CMT-8115 serves as an alternative substitute from a different manufacturer. It meets all core electrical and mechanical parameters and is also in active production. The CMT-8115 includes additional certifications (CSA, IEC, UL, VDE) and specifies an AC voltage rating of 1500V, providing enhanced regulatory documentation for applications requiring third-party approvals.

Selection between the 8115-RC and CMT-8115 should be based on supply chain availability, procurement preferences, and specific regulatory or certification requirements of the end application.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 8115-RC directly replace the obsolete Bourns 8115?

A: Yes. The 8115-RC maintains identical electrical specifications: 1.2 mH inductance, 16A current rating, 6mOhm DCR, and operating temperature range of -55°C to 105°C. Physical dimensions are compatible with through-hole PCB layouts. The primary difference is RoHS3 compliance status and active production availability.

Q: What are the key differences between the Bourns 8115-RC and Triad CMT-8115?

A: Both parts meet the core electrical and mechanical requirements. The CMT-8115 is manufactured by Triad Magnetics and includes additional certifications (CSA, IEC, UL, VDE) and an AC voltage rating specification of 1500V. The 8115-RC is a Bourns product with ROHS3 compliance. Functional performance within the specified parameter envelope is equivalent.

Q: Are there dimensional compatibility concerns when substituting these parts?

A: The Bourns 8115 measures 1.450" L x 0.800" W. Both substitute parts (8115-RC and CMT-8115) measure 1.500" L x 0.800" W. All three components share the same maximum height of 1.530" and vertical 4-pin package configuration. Verify PCB layout clearances for the slightly increased length of substitute parts.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: Both the Bourns 8115-RC and Triad CMT-8115 are ROHS3 compliant. Either part is suitable for applications with RoHS requirements. The original Bourns 8115 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.

Q: Do the substitute parts require different PCB footprints?

A: No. All three parts use identical vertical 4-pin through-hole package configurations with the same pin spacing and height specifications. PCB footprints designed for the Bourns 8115 are compatible with both substitute parts, though the slightly increased length of the 8115-RC and CMT-8115 should be verified against board layout constraints.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message