TF0804S-01 Equivalent & Substitute Parts

Part Overview

The TF0804S-01 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 50mOhm 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 system maintenance and new design implementations where legacy compatibility is not required.

Substiute Parts

TF0804S-01

TDK CorporationIn Stock: 758TF0804S-01 Datasheet

Current PartRFQ

RS512-4-02

Schaffner EMC Inc.In Stock: 1370RS512-4-02 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TF0804S-01 is determined by the following critical parameters:

• Number of Lines: Must remain 2-line configuration for circuit compatibility
• Mounting Type: Through-hole mounting required for PCB integration
• Current Rating: Substitute must equal or exceed 1A maximum current specification
• DC Resistance: Substitute DCR must not exceed 50mOhm to maintain electrical performance
• Operating Temperature Range: Substitute must support the required thermal envelope
• Pin Configuration: 4-pin through-hole package required for footprint compatibility

The RS512-4-02 from Schaffner EMC Inc. qualifies as a manufacturer-recommended substitute based on these parameters. While the RS512-4-02 operates as a signal line filter (versus power line) and exhibits different physical dimensions and inductance characteristics, it maintains the essential 2-line, through-hole, 4-pin configuration with superior current handling (4A typical) and lower DC resistance (10mOhm typical), making it suitable for applications where the TF0804S-01 is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The RS512-4-02 is the manufacturer-recommended substitute for the obsolete TF0804S-01. Selection of this substitute is supported by the following factors:

• Product Status: The TF0804S-01 is obsolete; the RS512-4-02 is active and currently in production, ensuring long-term availability and supply chain continuity.
• Compliance & Certifications: The RS512-4-02 carries UR and VDE approvals and is RoHS3 compliant, meeting modern regulatory requirements. Both components maintain REACH Unaffected status.
• Electrical Performance: The RS512-4-02 exceeds the current rating (4A typical vs. 1A) and provides superior DC resistance characteristics (10mOhm typical vs. 50mOhm), resulting in lower power dissipation and improved thermal performance.
• Environmental Specifications: The RS512-4-02 supports an extended operating temperature range (-40°C ~ 125°C vs. -20°C ~ 120°C), providing greater thermal margin for demanding applications.
• Mechanical Compatibility: Both components maintain 2-line, through-hole, 4-pin configurations. Physical orientation differs (vertical vs. horizontal), requiring PCB layout verification during integration.

Frequently Asked Questions (FAQ)

Q: Can the RS512-4-02 directly replace the TF0804S-01 without PCB modifications?

A: The RS512-4-02 maintains the same 2-line, through-hole, 4-pin electrical interface as the TF0804S-01. However, the package orientation differs (horizontal vs. vertical), and physical dimensions are larger (17.70mm x 17.10mm x 12.50mm vs. 10.00mm x 6.00mm). PCB layout verification is required to confirm footprint compatibility and clearance around the component.

Q: What are the key electrical differences between these components?

A: The RS512-4-02 provides superior electrical performance with 4A typical current rating (versus 1A) and 10mOhm typical DC resistance (versus 50mOhm maximum). The RS512-4-02 also specifies 3µH inductance at 1kHz and includes a 250V AC voltage rating. These characteristics make the RS512-4-02 suitable for higher-current applications with lower power loss.

Q: Are there compliance or regulatory differences?

A: The RS512-4-02 carries UR and VDE approvals and is RoHS3 compliant, meeting current regulatory standards. The TF0804S-01 specifications do not list these certifications. Both components are REACH Unaffected and carry EAR99 ECCN classification.

Q: What is the difference between power line and signal line filter types?

A: The TF0804S-01 is designated for power line filtering, while the RS512-4-02 is designated for signal line filtering. Both are 2-line common mode chokes designed to suppress differential-mode noise. The functional principle remains the same; application context determines the appropriate filter type classification.

Q: How does the temperature operating range affect component selection?

A: The RS512-4-02 supports -40°C ~ 125°C, providing a 20°C lower minimum and 5°C higher maximum compared to the TF0804S-01 (-20°C ~ 120°C). For applications operating near temperature extremes, the RS512-4-02 offers greater thermal margin and reliability.