T491D686K016AS-F Equivalent & Substitute Parts

Part Overview

The T491D686K016AS-F is a 68 µF molded tantalum capacitor rated at 16 V, manufactured by Cornell Dubilier Electronics (CDE) in the 2917 (7343 Metric) package. This component is classified as a general-purpose surface-mount capacitor suitable for applications requiring stable capacitance and reliable performance across industrial temperature ranges. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and environmental ratings align with the original component requirements.

Substiute Parts

T491D686K016AS-F

Cornell Dubilier Electronics (CDE)In Stock: 960T491D686K016AS-F Datasheet

Current PartRFQ

T491D686K016AT

KEMETIn Stock: 2330T491D686K016AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T491D686K016AS-F is determined by strict alignment of the following parameters:

Primary Electrical Parameters:

• Capacitance value: 68 µF (exact match required)
• Voltage rating: 16 V (exact match required)
• Tolerance: ±10% (exact match required)

Mechanical Parameters:

• Package / Case: 2917 (7343 Metric) (exact match required for PCB footprint compatibility)
• Mounting type: Surface Mount (exact match required)
• Physical dimensions: 0.287" L x 0.169" W (7.30mm x 4.30mm) with maximum seated height of 0.122" (3.10mm)

Environmental & Compliance Parameters:

• Operating temperature range: -55°C ~ 125°C (exact match required)
• RoHS3 compliance (required)
• Moisture Sensitivity Level: 1 (Unlimited) (required)
• REACH unaffected status (required)

The substitute part T491D686K016AT meets all primary electrical, mechanical, and environmental criteria, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Both the T491D686K016AS-F and T491D686K016AT are Active product status components with full RoHS3 compliance and REACH unaffected designation. Selection between these parts is based on availability and supply chain requirements rather than electrical or mechanical differences.

The T491D686K016AT (KEMET) provides documented ESR of 700 mOhm and lifetime specification of 2000 hours at 125°C, offering additional technical transparency for applications requiring detailed performance characterization. The T491D686K016AS-F (CDE) maintains equivalent functional performance within the specified parameter set.

Both components are suitable for direct substitution in surface-mount PCB assemblies where 68 µF capacitance at 16 V with ±10% tolerance and 2917 package footprint are required. Regulatory compliance is maintained across both options.

Frequently Asked Questions (FAQ)

Q: Can T491D686K016AT replace T491D686K016AS-F in existing designs?

A: Yes. Both components share identical electrical specifications (68 µF, 16 V, ±10% tolerance), mechanical dimensions (2917 package, 0.287" x 0.169" x 0.122" max height), and environmental ratings (-55°C to 125°C operating range). PCB footprints are directly compatible.

Q: Are there differences in ESR or lifetime specifications?

A: The T491D686K016AT provides documented ESR of 700 mOhm and 2000-hour lifetime at 125°C. The T491D686K016AS-F does not specify these parameters in the provided data. Both meet the core electrical and mechanical requirements for substitution.

Q: What packaging options are available for the substitute part?

A: The T491D686K016AT is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for different procurement and assembly workflows.

Q: Are both parts RoHS3 compliant?

A: Yes. Both T491D686K016AS-F and T491D686K016AT are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH unaffected status.

Q: What is the basis for substitution eligibility?

A: Substitution is based on exact matching of capacitance (68 µF), voltage rating (16 V), tolerance (±10%), package type (2917 / 7343 Metric), physical dimensions, mounting method (surface mount), operating temperature range (-55°C to 125°C), and regulatory compliance (RoHS3, REACH unaffected).