Equivalent & Substitute Parts for 4TPH68MHA

Part Overview

The 4TPH68MHA is a 68 µF molded tantalum polymer capacitor manufactured by Panasonic Electronic Components, rated for 4 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The POSCAP™ TPH series capacitor features 150 mOhm equivalent series resistance at 100 kHz and is rated for operation across -55°C to 105°C with a 1000-hour lifetime at 105°C.

Substiute Parts

4TPH68MHA

Panasonic Electronic ComponentsIn Stock: 21114TPH68MHA Datasheet

Current PartRFQ

T520B686M006ATE040

KEMETIn Stock: 34025T520B686M006ATE040 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 4TPH68MHA is determined by the following critical parameters:

• Capacitance Value: Must be 68 µF (±20% tolerance acceptable)
• Voltage Rating: Substitute must meet or exceed 4 V rated voltage
• Dielectric Type: Molded tantalum polymer construction required
• Mounting Configuration: Surface mount technology mandatory
• Temperature Range: Must support -55°C to 105°C operation
• Compliance: ROHS3 compliance and MSL 3 rating required

The substitute part T520B686M006ATE040 meets these criteria with a higher voltage rating (6.3 V) and improved ESR performance (40 mOhm), while maintaining identical capacitance, temperature range, and compliance specifications. The package footprint differs (1411 versus 1206), requiring PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

The T520B686M006ATE040 is a qualified substitute for the 4TPH68MHA based on the following factors:

• Both components maintain ROHS3 compliance and identical MSL 3 ratings, ensuring compatibility with standard manufacturing and storage protocols
• The substitute's higher voltage rating (6.3 V versus 4 V) provides additional design margin without compromising circuit performance
• Improved ESR performance (40 mOhm versus 150 mOhm) reduces thermal dissipation and enhances circuit efficiency
• Extended lifetime rating (2000 hours versus 1000 hours at 105°C) improves long-term reliability
• Active product status of the substitute ensures ongoing availability and supply chain continuity

The primary design consideration is package footprint change from 1206 to 1411, requiring PCB layout modification and verification of clearance constraints. The increased height (2.00 mm versus 1.00 mm) must be evaluated against available board space and component stacking requirements.

Frequently Asked Questions (FAQ)

Q: Can the T520B686M006ATE040 be used as a direct replacement without PCB modification?

A: No. The package footprint differs (1411 versus 1206), and the seated height increases from 1.00 mm to 2.00 mm. PCB layout modification is required, including pad pattern adjustment and clearance verification.

Q: Does the higher voltage rating (6.3 V) affect circuit operation?

A: No. A higher voltage-rated capacitor operates safely in lower-voltage applications. The 6.3 V rating provides additional design margin and does not alter electrical performance in a 4 V circuit.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant with MSL 3 ratings. The substitute includes REACH Unaffected status, providing additional regulatory documentation.

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

A: The substitute's lower ESR (40 mOhm versus 150 mOhm) reduces impedance and thermal dissipation. This improves performance in high-frequency applications and extends component lifetime.

Q: Is the capacitance tolerance identical between both parts?

A: Yes. Both components maintain ±20% capacitance tolerance, ensuring equivalent electrical performance within specified limits.

Q: What packaging format is available for the substitute part?

A: The T520B686M006ATE040 is supplied in Tape & Reel (TR) format, standard for automated assembly processes.