T525B686M004ATE080 Equivalent & Substitute Parts

Part Overview

The T525B686M004ATE080 is a 68 µF molded tantalum polymer capacitor manufactured by KEMET in the KO-CAP® T525 series. This surface mount component operates at a rated voltage of 4 V with an equivalent series resistance of 80 mOhm at 100 kHz. The part is packaged in a 1411 (3528 Metric) case measuring 3.50mm × 2.80mm × 2.00mm (max height) and is designed for general purpose applications across an operating temperature range of -55°C to 125°C. The T525B686M004ATE080 maintains Active product status and is ROHS3 compliant. Identifying equivalent and substitute parts becomes necessary when addressing supply chain constraints, inventory availability, or application requirements that permit operation at higher voltage ratings while maintaining identical capacitance and physical form factors.

Substiute Parts

T525B686M004ATE080

KEMETIn Stock: 992T525B686M004ATE080 Datasheet

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T525B686M006ATE080

KEMETIn Stock: 3193T525B686M006ATE080 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the T525B686M004ATE080 is determined by strict adherence to the following parameters:

Fixed Parameters (Must Match Exactly):

• Capacitance: 68 µF
• Tolerance: ±20%
• Type: Molded Tantalum Polymer
• ESR: 80 mOhm @ 100 kHz
• Package / Case: 1411 (3528 Metric)
• Physical Dimensions: 3.50mm L × 2.80mm W × 2.00mm (max height)
• Operating Temperature Range: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Series: KO-CAP® T525
• Manufacturer: KEMET

Variable Parameter (Allows Substitution):

• Voltage - Rated: The substitute part may operate at a higher voltage rating provided all other parameters remain identical. A higher voltage rating does not compromise functionality in applications designed for lower voltage operation.

The T525B686M006ATE080 qualifies as a direct substitute because it maintains all fixed parameters while offering an elevated voltage rating of 6.3 V compared to the original 4 V specification.

Parameter Comparison

Engineering Selection Recommendations

The T525B686M006ATE080 is a valid substitute for the T525B686M004ATE080 in applications where component availability or supply chain requirements necessitate an alternative. Both parts maintain Active product status and are ROHS3 compliant, ensuring regulatory alignment. The substitute part carries identical capacitance, ESR characteristics, physical dimensions, and thermal operating range. The elevated voltage rating of 6.3 V in the substitute part provides additional design margin and does not introduce incompatibility with circuits specified for 4 V operation. Selection between these parts should be based on inventory availability, lead time requirements, and cost considerations, as electrical performance and mechanical compatibility are equivalent.

Frequently Asked Questions (FAQ)

Q: Can the T525B686M006ATE080 be used in place of the T525B686M004ATE080?

A: Yes. The substitute part maintains identical capacitance (68 µF), tolerance (±20%), ESR (80 mOhm @ 100 kHz), physical dimensions (3.50mm × 2.80mm × 2.00mm max), and operating temperature range (-55°C to 125°C). The higher voltage rating (6.3 V vs. 4 V) does not prevent operation in circuits designed for the original 4 V specification.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts use the 1411 (3528 Metric) package with identical length (3.50mm), width (2.80mm), and maximum seated height (2.00mm). PCB footprints and assembly processes remain unchanged.

Q: Do both parts have the same ESR characteristics?

A: Yes. Both the T525B686M004ATE080 and T525B686M006ATE080 exhibit 80 mOhm equivalent series resistance at 100 kHz, ensuring identical high-frequency performance.

Q: What is the significance of the voltage rating difference?

A: The voltage rating indicates the maximum continuous voltage the capacitor can withstand. A higher voltage rating (6.3 V) provides additional safety margin in applications operating at lower voltages (4 V). This does not affect capacitance value, ESR, or physical form factor.

Q: Are both parts RoHS compliant?

A: Yes. Both the T525B686M004ATE080 and T525B686M006ATE080 are ROHS3 compliant and carry identical MSL (Moisture Sensitivity Level) ratings of 3 (168 Hours).

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. Identical package specifications, mounting type (surface mount), and physical dimensions allow direct substitution without PCB redesign or assembly process modification.