PC06F4A Surface Mount Fuse 4A 32V Equivalent & Substitute Parts

Part Overview

The PC06F4A is a surface mount board-mounted fuse manufactured by Eaton - Electronics Division, rated for 4 A at 32 V AC/DC with fast-blow response characteristics. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support, production continuity, and component sourcing.

The PC06F4A operates in the PolyCHIP™ PC06F series and is packaged in the 0603 (1608 Metric) form factor. Due to its obsolete status, active production alternatives must be evaluated to maintain circuit performance and reliability in applications requiring this fuse specification.

Substiute Parts

PC06F4A

Eaton - Electronics DivisionIn Stock: 755PC06F4A Datasheet

Current PartRFQ

TR/0603FA4-R

Eaton - Electronics DivisionIn Stock: 5522TR/0603FA4-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PC06F4A are identified based on strict electrical and mechanical parameter matching. The substitution logic is based on the following criteria:

Mandatory Matching Parameters:

• Current Rating: 4 A (exact match required)
• Voltage Rating: 32 V AC and 32 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 0603 (1608 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Fuse Type: Board Mount, non-cartridge style (exact match required)

Acceptable Variation Parameters:

• Breaking Capacity: Substitute may differ from 50 A if functionally adequate for the application circuit
• Approval Agencies: Substitute must maintain UL certification; additional certifications (CSA) are acceptable
• DC Cold Resistance: Minor variations acceptable within engineering tolerance
• Melting I²t: Variations acceptable if within fast-blow response classification
• Moisture Sensitivity Level: Substitute may have improved rating (MSL 1 vs. MSL 2)
• Operating Temperature Range: Substitute may have extended range

The TR/0603FA4-R meets all mandatory matching criteria and qualifies as a direct substitute for the obsolete PC06F4A.

Parameter Comparison

Engineering Selection Recommendations

The TR/0603FA4-R is the qualified substitute for the obsolete PC06F4A based on the following engineering criteria:

Electrical Compatibility: The TR/0603FA4-R maintains identical current rating (4 A), voltage ratings (32 V AC/DC), and response time classification (Fast Blow). These parameters are critical for circuit protection function and must not vary between the original and substitute component.

Mechanical Compatibility: Both components share identical package designation (0603 / 1608 Metric), mounting type (Surface Mount), and fuse form factor (Board Mount, non-cartridge). PCB layout and assembly processes require no modification.

Regulatory Compliance: The TR/0603FA4-R carries UL certification, maintaining the approval agency requirement of the original PC06F4A. The addition of CSA certification provides enhanced regulatory coverage.

Product Status Advantage: The TR/0603FA4-R is classified as Active, ensuring long-term availability and production continuity. The PC06F4A's Obsolete status creates supply risk and justifies transition to the active substitute.

Enhanced Specifications: The TR/0603FA4-R offers improved moisture sensitivity level (MSL 1 vs. MSL 2), defined operating temperature range (-55°C ~ 125°C), and RoHS compliance. These enhancements support modern manufacturing and environmental requirements without compromising circuit function.

Parameter Variations: The breaking capacity reduction from 50 A to 35 A and DC cold resistance increase from 0.012 Ω to 0.017 Ω are acceptable variations. Both components maintain fast-blow response classification, and the 35 A breaking capacity remains adequate for typical 4 A fuse applications.

Frequently Asked Questions (FAQ)

Q: Can TR/0603FA4-R be used as a direct replacement for PC06F4A without circuit redesign?

A: Yes. The TR/0603FA4-R meets all mandatory electrical and mechanical parameters: 4 A current rating, 32 V AC/DC voltage rating, fast-blow response, 0603 package, and surface mount configuration. No circuit redesign is required.

Q: What is the significance of the breaking capacity difference (50 A vs. 35 A)?

A: Breaking capacity defines the maximum fault current the fuse can safely interrupt at rated voltage. The TR/0603FA4-R's 35 A breaking capacity is adequate for standard 4 A fuse applications. Verify that your circuit's maximum fault current does not exceed 35 A. If fault current exceeds 35 A, consult the circuit design requirements.

Q: Are there dimensional differences between PC06F4A and TR/0603FA4-R?

A: Both components are 0603 (1608 Metric) package. Height differs slightly: PC06F4A is 0.021" (0.53mm) versus TR/0603FA4-R at 0.019" (0.48mm). This 0.002" difference is within PCB assembly tolerance and does not affect placement or soldering.

Q: Does the DC cold resistance increase from 0.012 Ω to 0.017 Ω affect circuit performance?

A: The resistance increase is minor and typical for component manufacturing variation within the same product class. For most applications, this 0.005 Ω difference produces negligible voltage drop and power dissipation impact. Verify in high-current or precision applications if required.

Q: What is the advantage of MSL 1 (Unlimited) versus MSL 2 (1 Year)?

A: MSL rating indicates moisture sensitivity for storage and handling. MSL 1 (Unlimited) allows indefinite shelf storage without special humidity control. MSL 2 (1 Year) requires controlled storage conditions. The TR/0603FA4-R's improved MSL rating simplifies inventory management and reduces storage risk.

Q: Is RoHS compliance required for my application?

A: RoHS compliance is mandatory for products sold in the European Union and many other markets. The TR/0603FA4-R is RoHS compliant. If your application requires RoHS certification, the TR/0603FA4-R meets this requirement; the PC06F4A's RoHS status is not specified.

Q: Can I use TR/0603FA4-R in applications with operating temperatures below -55°C or above 125°C?

A: No. The TR/0603FA4-R is rated for -55°C to 125°C operation. Applications requiring operation outside this range require alternative component selection. The PC06F4A's operating temperature range is not specified in available documentation.

Q: What is the difference between PC06F4A and TR/0603FA4-R packaging?

A: PC06F4A is supplied in standard packaging (packaging type not specified). TR/0603FA4-R is supplied in Tape & Reel (TR) format, which is standard for high-volume surface mount assembly. Tape & Reel packaging is compatible with automated pick-and-place equipment and is the industry standard for 0603 components.

Q: Are there other Eaton substitutes for PC06F4A?

A: The TR/0603FA4-R is the primary active substitute from Eaton - Electronics Division. The TR/0603FA4-R documentation references additional cross-references (SF-0603F400-2, MFU0603FF04000P100, 3412.0123.22, C2Q 4, MFU0603FF04000P500), which may represent alternative packaging or regional variants. Consult Eaton technical documentation for these alternatives.