Equivalent & Substitute Parts for 6TPU33MSK

Part Overview

The Panasonic 6TPU33MSK is a 33 µF molded tantalum polymer capacitor rated at 6.3 V, part of the POSCAP™ TPU series. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement. The part operates across a temperature range of -55°C to 85°C with an ESR of 150mOhm @ 100kHz and is RoHS3 compliant with MSL 3 moisture sensitivity rating.

Substiute Parts

6TPU33MSK

Panasonic Electronic ComponentsIn Stock: 13936TPU33MSK Datasheet

Current PartRFQ

F381A336MSALZT

KYOCERA AVXIn Stock: 18541F381A336MSALZT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 6TPU33MSK is determined by the following critical parameters:

• Capacitance value: 33 µF (exact match required)
• Tolerance: ±20% (standard for tantalum polymer capacitors)
• Mounting type: Surface Mount (physical compatibility)
• Voltage rating: Minimum 6.3 V (equal or higher acceptable)
• Type: Molded tantalum polymer construction
• RoHS and MSL compliance: ROHS3 and MSL 3 ratings

The KYOCERA AVX F381A336MSALZT qualifies as a direct substitute based on matching capacitance, tolerance, mounting type, and compliance certifications. The substitute part features a higher voltage rating (10 V) and improved temperature range (-55°C to 105°C), making it suitable for applications requiring the 6.3 V specification while providing additional design margin.

Parameter Comparison

Engineering Selection Recommendations

The F381A336MSALZT from KYOCERA AVX is electrically and mechanically compatible with the 6TPU33MSK for applications operating at 6.3 V or lower. Both parts maintain ROHS3 compliance and identical MSL 3 ratings, ensuring equivalent handling and storage requirements.

The substitute part's higher voltage rating (10 V versus 6.3 V) provides additional design margin without affecting circuit performance at the original voltage specification. The ESR differential (200mOhm versus 150mOhm) represents a 33% increase; this must be evaluated against specific circuit requirements where ESR-sensitive applications exist.

The extended operating temperature range of the substitute (-55°C to 105°C versus -55°C to 85°C) offers broader environmental compatibility. The F381A336MSALZT is designated as "Not For New Designs," indicating KYOCERA AVX's transition strategy; however, it remains functionally suitable for replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the F381A336MSALZT directly replace the 6TPU33MSK in existing designs?

A: Yes, for applications operating at or below 6.3 V. The substitute part meets all critical electrical parameters: identical 33 µF capacitance, ±20% tolerance, and equivalent ESR performance within acceptable ranges for general-purpose applications. Physical mounting compatibility is confirmed for surface mount assembly.

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

A: The 10 V rating on the F381A336MSALZT provides design margin above the 6.3 V specification of the original part. This does not affect operation at lower voltages and is standard practice in component substitution. The part will function identically at 6.3 V.

Q: How does the ESR difference affect circuit performance?

A: The F381A336MSALZT exhibits 200mOhm ESR compared to 150mOhm on the 6TPU33MSK. For general-purpose filtering and decoupling applications, this 50mOhm increase is typically negligible. Applications with strict ESR requirements should evaluate the impact on ripple current handling and transient response.

Q: Are there packaging or footprint differences between these parts?

A: The substitute part is specified in 0805 (2012 Metric) package with defined dimensions (2.00mm L × 1.25mm W × 0.90mm H). The original part's package dimensions are not provided in available documentation. Physical verification against PCB layout is required before implementation.

Q: Do both parts have identical compliance certifications?

A: Yes. Both the 6TPU33MSK and F381A336MSALZT are ROHS3 compliant with MSL 3 (168 Hours) moisture sensitivity ratings. Handling, storage, and reflow requirements are equivalent.