4TPU68MSI Equivalent & Substitute Parts

Part Overview

The 4TPU68MSI is a 68 µF molded tantalum polymer capacitor rated at 4 V, manufactured by Panasonic Electronic Components in the POSCAP™ TPU series. This component is designed for surface mount applications in the 0805 (2012 Metric) package format. The part is currently obsolete, making identification of suitable substitute components necessary for ongoing production support, legacy system maintenance, and design continuity.

Substiute Parts

4TPU68MSI

Panasonic Electronic ComponentsIn Stock: 86314TPU68MSI Datasheet

Current PartRFQ

F380J686MSALZT

KYOCERA AVXIn Stock: 184461F380J686MSALZT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 4TPU68MSI is based on the following electrical and mechanical compatibility criteria:

• Capacitance Value: Must be 68 µF (±20% tolerance acceptable)
• Package Format: Must be 0805 (2012 Metric) for mechanical fit and PCB compatibility
• Mounting Type: Must be Surface Mount
• Voltage Rating: Must be equal to or greater than 4 V to maintain circuit safety margins
• Type: Molded tantalum polymer construction
• Temperature Range: Must support the operating environment of -55°C to 85°C minimum
• RoHS Compliance: ROHS3 compliance required for regulatory alignment

The F380J686MSALZT from KYOCERA AVX meets all substitution criteria with a higher voltage rating (6.3 V) and extended temperature range (-55°C ~ 105°C), providing enhanced reliability margins.

Parameter Comparison

Engineering Selection Recommendations

The F380J686MSALZT is a direct functional substitute for the 4TPU68MSI based on electrical and mechanical compatibility. Both components are ROHS3 compliant and share identical physical dimensions and MSL ratings. The substitute part provides a higher voltage rating (6.3 V versus 4 V) and extended operating temperature range (-55°C ~ 105°C versus -55°C ~ 85°C), offering improved design margins for thermal and electrical stress conditions.

The ESR specification of the substitute (200 mOhm @ 100kHz) is slightly higher than the original (150 mOhm @ 100kHz), which remains within acceptable parameters for general-purpose tantalum polymer capacitor applications in this package class.

Both parts carry product status designations indicating limited availability: the original is obsolete, and the substitute is not recommended for new designs. Component selection should prioritize current production alternatives where available for new applications.

Frequently Asked Questions (FAQ)

Q: Can the F380J686MSALZT replace the 4TPU68MSI in existing designs?

A: Yes. Both components share identical capacitance (68 µF), tolerance (±20%), package format (0805 / 2012 Metric), physical dimensions, and mounting type. The substitute has a higher voltage rating and extended temperature range, making it electrically and mechanically compatible.

Q: What is the significance of the higher voltage rating on the substitute part?

A: The F380J686MSALZT is rated at 6.3 V compared to the 4TPU68MSI at 4 V. In a 4 V circuit application, the substitute operates at a lower stress level, which can improve reliability and lifetime performance. This is a beneficial characteristic for substitution.

Q: Are there any concerns with the ESR difference between these parts?

A: The substitute has an ESR of 200 mOhm @ 100kHz versus 150 mOhm @ 100kHz for the original. This 50 mOhm difference is typical within the tantalum polymer capacitor product class and does not affect compatibility for general-purpose applications. Circuit-specific requirements should be evaluated if ESR is a critical parameter.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both the 4TPU68MSI and F380J686MSALZT are rated MSL 3 (168 Hours), requiring identical handling, storage, and reflow procedures during assembly.

Q: What is the difference between "Obsolete" and "Not For New Designs" product status?

A: Obsolete indicates the part is no longer manufactured or available from the original manufacturer. Not For New Designs indicates the manufacturer has discontinued the product line but may have limited inventory available. For new applications, neither part should be selected; current production alternatives should be identified.

Q: Are both parts RoHS compliant?

A: Yes. Both the 4TPU68MSI and F380J686MSALZT are ROHS3 compliant, meeting current regulatory requirements for electronic component manufacturing and use.