T520T686M006ATE070 Equivalent & Substitute Parts

Part Overview

The T520T686M006ATE070 is a 68 µF molded tantalum polymer capacitor rated at 6.3 V with an equivalent series resistance (ESR) of 70 mOhm @ 100 kHz, manufactured by KEMET in the KO-CAP® T520 series. This surface mount component is housed in a 1411 (3528 Metric) package and is designed for general purpose applications requiring stable capacitance and low ESR characteristics across the operating temperature range of -55°C to 105°C.

The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, ESR) and mechanical compatibility (package dimensions, mounting type, and form factor) within the established parameter tolerances for this component category.

Substiute Parts

T520T686M006ATE070

KEMETIn Stock: 1380T520T686M006ATE070 Datasheet

Current PartRFQ

T520B686M006ATE025

KEMETIn Stock: 2144T520B686M006ATE025 Datasheet

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T520B686M006ATE040

KEMETIn Stock: 34025T520B686M006ATE040 Datasheet

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T520B686M006ATE070

KEMETIn Stock: 2473T520B686M006ATE070 Datasheet

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T55B686M6R3C0070

Vishay SpragueIn Stock: 2831T55B686M6R3C0070 Datasheet

DirectRFQ

6TPC47MB

Panasonic Electronic ComponentsIn Stock: 41726TPC47MB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T520T686M006ATE070 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 68 µF (±20% tolerance band)
• Voltage Rating: 6.3 V (equal or higher)
• Package / Case: 1411 (3528 Metric)
• Mounting Type: Surface Mount
• Type: Molded Tantalum Polymer
• Operating Temperature Range: -55°C to 105°C minimum
• RoHS3 Compliance: Required
• MSL Rating: 3 (168 Hours) or better

Secondary Consideration:

• ESR @ 100 kHz: Substitutes with equal or lower ESR values are acceptable within the same electrical and mechanical parameter set

Substitute parts are grouped into two categories:

Category 1: KEMET KO-CAP® T520 Series (Same Manufacturer, Same Base Series)

• T520B686M006ATE025 (25 mOhm ESR variant)
• T520B686M006ATE040 (40 mOhm ESR variant)
• T520B686M006ATE070 (70 mOhm ESR variant, Type B package)

Category 2: Cross-Manufacturer Direct Equivalents

• T55B686M6R3C0070 (Vishay Sprague vPolyTan™ T55 series)

Category 3: Partial Specification Match (Capacitance Variance)

• 6TPC47MB (Panasonic POSCAP™ TPC series) - 47 µF capacitance, not a direct substitute for 68 µF applications

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Electrically and Mechanically Equivalent):

The T520B686M006ATE070, T520B686M006ATE040, and T520B686M006ATE025 are direct substitutes within the KEMET KO-CAP® T520 series. All three maintain identical capacitance (68 µF), voltage rating (6.3 V), package dimensions (1411/3528 Metric), and operating temperature range. The primary difference is ESR performance: the T520B686M006ATE025 offers superior low-ESR performance (25 mOhm), while the T520B686M006ATE040 provides mid-range ESR (40 mOhm). All variants are Active products with full RoHS3 compliance and identical MSL ratings.

Cross-Manufacturer Equivalent:

The T55B686M6R3C0070 (Vishay Sprague vPolyTan™ T55 series) is a direct electrical and mechanical equivalent with matching 68 µF capacitance, 6.3 V rating, 70 mOhm ESR, and 1411 package. This part is Active and RoHS3 compliant. The seated height is 2.10 mm, which is within acceptable tolerance for the 1411 package form factor.

Non-Equivalent Part:

The 6TPC47MB (Panasonic POSCAP™ TPC) is not a direct substitute. Although it shares the same package, voltage rating, ESR, and RoHS3 compliance, the capacitance value of 47 µF differs from the required 68 µF specification. This part carries Last Time Buy status and should not be selected for new designs requiring 68 µF capacitance.

Frequently Asked Questions (FAQ)

Q: Can I use T520B686M006ATE025 in place of T520T686M006ATE070?

A: Yes. Both parts have identical capacitance (68 µF), voltage rating (6.3 V), package (1411/3528 Metric), and operating temperature range (-55°C to 105°C). The T520B variant has lower ESR (25 mOhm vs. 70 mOhm), which is an improvement for applications sensitive to impedance. The primary difference is seated height: 2.00 mm (Type B) versus 1.20 mm (Type T). Verify PCB clearance before substitution.

Q: What is the difference between Type T and Type B in the KEMET T520 series?

A: The designation refers to the manufacturer size code, which correlates to package height. Type T (T520T) has a maximum seated height of 1.20 mm, while Type B (T520B) has a maximum seated height of 2.00 mm. Both fit the 1411 (3528 Metric) package footprint. Selection depends on available PCB vertical clearance.

Q: Is the Vishay Sprague T55B686M6R3C0070 a suitable replacement?

A: Yes. The T55B686M6R3C0070 matches all critical electrical parameters: 68 µF capacitance, 6.3 V rating, 70 mOhm ESR, and 1411 package. It is Active and RoHS3 compliant with MSL 3 rating. The seated height is 2.10 mm, which is within acceptable tolerance for the 1411 package. Cross-manufacturer substitution is valid when electrical and mechanical specifications align.

Q: Why is 6TPC47MB listed as a substitute if the capacitance is different?

A: The 6TPC47MB is not a direct substitute for 68 µF applications. It is listed in the original part's substitute field but does not meet the primary substitution criterion of matching capacitance value. This part should only be selected if the application circuit is designed for 47 µF capacitance. The part is in Last Time Buy status and not recommended for new designs.

Q: What does MSL 3 (168 Hours) mean for component handling?

A: MSL (Moisture Sensitivity Level) 3 indicates the component can be exposed to ambient conditions (30°C, 85% relative humidity) for a maximum of 168 hours before soldering. After this period, the component must be baked according to IPC standards before assembly. All listed substitutes share this MSL rating, so handling procedures remain consistent.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (T520B variants, T55B686M6R3C0070, and 6TPC47MB) are RoHS3 compliant. This ensures compatibility with regulatory requirements and supply chain restrictions on restricted substances.

Q: Can I mix different ESR variants in the same circuit?

A: Electrical performance will differ. Lower ESR variants (25 mOhm, 40 mOhm) reduce impedance and heat generation compared to 70 mOhm variants. If the circuit is designed for 70 mOhm ESR, substituting a lower-ESR part will improve performance but may not be necessary. Substituting a higher-ESR part into a circuit designed for lower ESR may cause performance degradation. Verify circuit requirements before mixing variants.