CM08RB05 Common Mode Choke Equivalent & Substitute Parts

Part Overview

The CM08RB05 is a 2-line common mode choke manufactured by Taiyo Yuden, designed for signal line filtering applications in through-hole configurations. This component features 450 Ohms impedance at 100 MHz with a 4A maximum current rating and 20mOhm DC resistance. The CM08RB05 is classified as obsolete, necessitating identification of functionally equivalent substitute components for ongoing design support and procurement requirements.

Substiute Parts

CM08RB05

Taiyo YudenIn Stock: 754CM08RB05 Datasheet

Current PartRFQ

RS514-4-02

Schaffner EMC Inc.In Stock: 1409RS514-4-02 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CM08RB05 is based on the following critical parameters that must align across candidate parts:

Primary Substitution Criteria:

• Filter Type: Signal Line
• Number of Lines: 2
• Mounting Type: Through Hole
• Current Rating: 4A or greater
• DC Resistance: 20mOhm or less
• Package Configuration: 4-pin through-hole

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed the application requirements
• Voltage ratings must meet or exceed circuit specifications
• Physical dimensions must accommodate board layout constraints
• Impedance characteristics at specified frequencies must provide equivalent filtering performance

The RS514-4-02 manufactured by Schaffner EMC Inc. qualifies as a substitute based on matching core electrical parameters (2-line configuration, 4A current rating, 20mOhm DCR, through-hole mounting) and functional equivalence in signal line filtering applications.

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The RS514-4-02 maintains electrical equivalence with the CM08RB05 across core parameters: 2-line configuration, 4A current capacity, and 20mOhm DCR. Both components operate within acceptable voltage and temperature ranges for typical signal line filtering applications.

Compliance and Certifications: The RS514-4-02 carries UR and VDE approvals and is RoHS3 compliant, providing enhanced regulatory coverage compared to the CM08RB05. Both components are REACH unaffected and classified under EAR99 export control.

Physical Integration Considerations: The RS514-4-02 exhibits larger footprint dimensions (22.50mm x 21.50mm versus 13.00mm x 9.50mm) and horizontal pin orientation compared to the vertical configuration of the CM08RB05. Board layout redesign may be required to accommodate the substitute component. Height specifications are comparable (13.20mm versus 14.50mm).

Product Status: Both the CM08RB05 and RS514-4-02 are classified as obsolete. Procurement of either component requires verification of current inventory availability through authorized distributors.

Frequently Asked Questions (FAQ)

Q: Can the RS514-4-02 directly replace the CM08RB05 without circuit modification?

A: Electrical substitution is valid based on matching current rating, DC resistance, and 2-line configuration. However, physical board layout modification is required due to differences in package orientation (horizontal versus vertical) and footprint dimensions. Pin-to-pin compatibility must be verified against specific board design.

Q: What are the key differences in operating temperature ranges?

A: The CM08RB05 operates from -25°C to 105°C, while the RS514-4-02 operates from -40°C to 125°C. The RS514-4-02 provides extended low-temperature performance and higher maximum operating temperature, suitable for applications requiring broader thermal operating windows.

Q: How do the impedance specifications differ between these components?

A: The CM08RB05 specifies 450 Ohms impedance at 100 MHz. The RS514-4-02 specifies 8 µH inductance at 1 kHz. These represent different measurement methodologies and frequency points. Filtering performance equivalence must be validated against specific application frequency requirements.

Q: Are there packaging or inventory considerations for the RS514-4-02?

A: The RS514-4-02 is supplied in tray packaging, whereas the CM08RB05 packaging format is not specified. Both components are classified as obsolete, requiring direct verification of current stock availability through component distributors.

Q: What certifications does the RS514-4-02 provide that the CM08RB05 does not?

A: The RS514-4-02 carries UR and VDE approvals and is RoHS3 compliant. The CM08RB05 approval agency information is not specified. These additional certifications may be required for applications subject to specific regulatory or customer qualification requirements.

Q: Can the RS514-4-02 accommodate the same voltage specifications as the CM08RB05?

A: The CM08RB05 specifies 50V DC rating. The RS514-4-02 specifies 250V AC rating with no DC voltage specification provided. Application voltage requirements must be evaluated against available component specifications to ensure adequate voltage margin.