TF0804S-02 Equivalent & Substitute Parts

Part Overview

The TF0804S-02 is a 2-line common mode choke (CMC) manufactured by TDK Corporation, designed for power line filtering applications. This through-hole component is rated for 1A maximum current with a DC resistance of 36mOhm and operates across a temperature range of -20°C to 120°C. The product is currently obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity.

Substiute Parts

TF0804S-02

TDK CorporationIn Stock: 887TF0804S-02 Datasheet

Current PartRFQ

SCF-05-350

KEMETIn Stock: 2264SCF-05-350 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SCF-05-350 manufactured by KEMET qualifies as a substitute for the TF0804S-02 based on the following critical parameters:

Substitution Criteria:

• Filter Type: Both components are power line common mode chokes
• Number of Lines: Both feature 2-line configuration
• Mounting Type: Both are through-hole mounted components
• Package Configuration: Both use vertical, no base, 4 PC pin package style
• DC Resistance: SCF-05-350 at 35mOhm is within acceptable tolerance relative to TF0804S-02 at 36mOhm
• Current Rating: SCF-05-350 rated at 5A exceeds the 1A requirement of TF0804S-02, providing design margin
• Operating Temperature: SCF-05-350 range of -40°C ~ 120°C encompasses the TF0804S-02 range of -20°C ~ 120°C
• Moisture Sensitivity: Both components have MSL rating of 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

The SCF-05-350 is the designated substitute for the obsolete TF0804S-02. Selection of this component is supported by the following factors:

Product Status: The SCF-05-350 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity compared to the obsolete TF0804S-02.

Compliance & Certifications: The SCF-05-350 carries ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements for electronic component procurement.

Electrical Compatibility: The SCF-05-350 meets or exceeds all critical electrical parameters of the TF0804S-02, including current rating (5A vs. 1A), DC resistance (35mOhm vs. 36mOhm), and operating temperature range (-40°C ~ 120°C vs. -20°C ~ 120°C).

Physical Considerations: The SCF-05-350 is larger in footprint (16.00mm x 12.00mm vs. 10.00mm x 6.00mm) and includes specified height (16.00mm). PCB layout verification is required to confirm accommodation of the increased dimensions.

Frequently Asked Questions (FAQ)

Q: Can the SCF-05-350 directly replace the TF0804S-02 without circuit modifications?

A: The SCF-05-350 is electrically compatible with the TF0804S-02 across all specified parameters. However, the increased physical dimensions (16.00mm x 12.00mm vs. 10.00mm x 6.00mm) require PCB layout verification to confirm mounting clearance and component spacing compatibility.

Q: What is the significance of the higher current rating on the SCF-05-350?

A: The SCF-05-350 is rated for 5A maximum current, compared to the TF0804S-02 at 1A. This provides design margin and allows the substitute component to handle higher current loads without thermal stress, improving reliability in the application.

Q: Are there compliance differences between these components?

A: The SCF-05-350 carries ROHS3 compliance and REACH unaffected status. The TF0804S-02 compliance information is not specified. For applications requiring regulatory compliance documentation, the SCF-05-350 provides explicit certification.

Q: How do the DC resistance values compare?

A: The SCF-05-350 has a DC resistance of 35mOhm, which is 1mOhm lower than the TF0804S-02 at 36mOhm. This negligible difference is within typical manufacturing tolerances and does not impact circuit performance.

Q: What is the inductance specification of the SCF-05-350?

A: The SCF-05-350 is specified at 4.6 mH @ 10 kHz. The TF0804S-02 inductance value is not provided in the available data.

Q: Are both components available in the same packaging format?

A: Both components use vertical, no base, 4 PC pin through-hole packaging. The pin configuration and electrical interface are compatible, though physical dimensions differ as noted above.