BU08RA16 Equivalent & Substitute Parts

Part Overview

The BU08RA16 is a 2-line common mode choke (CMC) manufactured by Taiyo Yuden, designed for signal line filtering applications. This through-hole component delivers 1.2 kOhms impedance at 200 MHz with a maximum current rating of 3A and 11mOhm DC resistance. The BU08RA16 is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Substiute Parts

BU08RA16

Taiyo YudenIn Stock: 737BU08RA16 Datasheet

Current PartRFQ

CPFC85NP-WH07

Sumida America Components Inc.In Stock: 2151CPFC85NP-WH07 Datasheet

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Z144E

OhmiteIn Stock: 920Z144E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU08RA16 is determined by the following critical parameters:

Primary Substitution Criteria:

• Filter type classification (Signal Line)
• Number of lines (2-line configuration)
• Impedance characteristics and frequency response
• Current rating capacity
• DC resistance specifications
• Mounting compatibility and form factor

The substitute parts listed below meet the functional requirements of common mode choke filtering for 2-line signal applications. Substitution validity is established through alignment of electrical performance parameters and physical mounting characteristics.

Parameter Comparison

Engineering Selection Recommendations

CPFC85NP-WH07 (Sumida America Components Inc.): This substitute is an active product classified as ROHS3 compliant. The CPFC85NP-WH07 is a 2-line common mode choke with 4A current rating, exceeding the BU08RA16 specification. Impedance is specified at 1 kOhms @ 100 MHz, compared to the main part's 1.2 kOhms @ 200 MHz. DC resistance is 20mOhm, higher than the original 11mOhm specification. The primary design consideration is the transition from through-hole to surface-mount packaging, which requires PCB layout modification. This substitute is suitable for applications where board space optimization and active product status are prioritized.

Z144E (Ohmite): This substitute is an active product classified as ROHS3 compliant and REACH unaffected. The Z144E is a fixed inductor with 1.8 µH inductance and 1.1A current rating. DC resistance is specified at 330mOhm. This component operates as a through-hole axial inductor rather than a common mode choke. The Z144E does not provide equivalent 2-line common mode filtering functionality and operates at significantly different electrical parameters. Selection of this substitute requires verification that application requirements can be met by a single-line inductor topology.

Frequently Asked Questions (FAQ)

Q: Can the CPFC85NP-WH07 directly replace the BU08RA16 in existing through-hole PCB designs?

A: No. The CPFC85NP-WH07 is a surface-mount component with a horizontal 4-pad configuration, while the BU08RA16 is a through-hole vertical component with 4-pin configuration. PCB layout and footprint redesign is required for implementation.

Q: What are the impedance differences between the BU08RA16 and CPFC85NP-WH07?

A: The BU08RA16 provides 1.2 kOhms impedance at 200 MHz. The CPFC85NP-WH07 provides 1 kOhms impedance at 100 MHz. The frequency response characteristics differ, and application-specific frequency requirements must be evaluated.

Q: Is the Z144E a suitable substitute for common mode choke applications?

A: The Z144E is a fixed inductor, not a common mode choke. It does not provide 2-line differential filtering. Selection requires confirmation that single-line inductor functionality meets application requirements.

Q: What is the current rating impact when substituting with CPFC85NP-WH07?

A: The CPFC85NP-WH07 has a 4A maximum current rating, compared to the BU08RA16's 3A rating. This provides additional current capacity margin for the application.

Q: How does DC resistance affect substitution decisions?

A: The BU08RA16 specifies 11mOhm maximum DCR. The CPFC85NP-WH07 specifies 20mOhm, representing a 9mOhm increase. Applications sensitive to insertion loss or power dissipation must evaluate this parameter against performance requirements.

Q: Are all substitute parts RoHS compliant?

A: The CPFC85NP-WH07 is ROHS3 compliant. The Z144E is ROHS3 compliant. Compliance status must be verified against specific regulatory requirements for the end application.