Equivalent & Substitute Parts for 20TQC8R2M

Part Overview

The 20TQC8R2M is an 8.2 µF molded tantalum polymer capacitor rated at 20 V, manufactured by Panasonic Electronic Components as part of the POSCAP™ TQC series. This component is designed for general-purpose surface mount applications in the 1411 (3528 Metric) package format. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production runs and field replacements.

Substiute Parts

20TQC8R2M

Panasonic Electronic ComponentsIn Stock: 761020TQC8R2M Datasheet

Current PartRFQ

35TQC10MYFB

Panasonic Electronic ComponentsIn Stock: 437335TQC10MYFB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 20TQC8R2M is determined by the following critical parameters:

• Package Compatibility: The substitute must use the same 1411 (3528 Metric) package to ensure mechanical fit and PCB layout compatibility.
• Voltage Rating: The substitute voltage rating must equal or exceed the original 20 V specification to maintain circuit safety margins.
• Capacitance Value: The substitute capacitance must meet or exceed 8.2 µF to preserve circuit functionality.
• Series Compatibility: Parts from the POSCAP™ TQC series maintain consistent electrical characteristics and thermal performance.
• Mounting Type: Surface mount configuration must be maintained for assembly process compatibility.

The identified substitute 35TQC10MYFB meets all substitution criteria while offering improved specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

The 35TQC10MYFB is the qualified substitute for the obsolete 20TQC8R2M based on the following engineering criteria:

Product Status: The substitute is classified as active, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements without modification to design documentation.

Electrical Specifications: The substitute provides a higher voltage rating (35 V versus 20 V) and increased capacitance (10 µF versus 8.2 µF), both of which are compatible with the original circuit application. The higher voltage rating provides additional safety margin in the circuit.

Thermal Performance: The substitute extends the operating temperature range to 150°C, offering improved thermal stability compared to the original 105°C maximum.

Physical Compatibility: Identical package dimensions and mounting type ensure direct PCB layout compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 35TQC10MYFB be used as a direct replacement for the 20TQC8R2M?

A: Yes. Both parts use the identical 1411 (3528 Metric) package with matching physical dimensions and surface mount configuration. The substitute meets all mechanical and electrical compatibility requirements for direct substitution.

Q: What are the key differences between these parts?

A: The substitute offers three primary improvements: active product status (versus obsolete), higher voltage rating (35 V versus 20 V), and increased capacitance (10 µF versus 8.2 µF). The ESR is slightly higher at 150 mOhm compared to 100 mOhm, and the operating temperature range extends to 150°C.

Q: Does the higher capacitance value affect circuit operation?

A: The increased capacitance from 8.2 µF to 10 µF is within the tolerance range and will not negatively impact circuit operation. In most applications, this provides improved filtering or energy storage characteristics.

Q: Are there any compliance concerns with using the substitute?

A: No. Both parts maintain identical RoHS3 and REACH compliance status, requiring no changes to regulatory documentation or supply chain certifications.

Q: Will the substitute fit the existing PCB layout?

A: Yes. The physical dimensions are identical: 0.138" L x 0.110" W (4.60mm x 2.80mm) with a maximum seated height of 0.079" (2.00mm). No PCB layout modifications are required.

Q: What is the impact of the higher ESR on circuit performance?

A: The ESR increase from 100 mOhm to 150 mOhm is a 50% increase. For general-purpose applications, this difference is typically negligible. Applications with strict ripple current or noise specifications should evaluate the impact through circuit simulation or testing.