T322D685K035AS Equivalent & Substitute Parts

Part Overview

The T322D685K035AS is a 6.8 µF molded tantalum capacitor manufactured by KEMET, rated for 35 V operation in an axial through-hole configuration. This component is classified as Active product status and serves general-purpose applications requiring stable capacitance and low equivalent series resistance (ESR) in compact form factors.

Substitute parts become necessary when the primary part number reaches end-of-life status, inventory constraints occur, or when design requirements mandate compliance with specific regulatory standards such as RoHS3. The T322D685K035AS is RoHS non-compliant, making alternative selections critical for applications subject to RoHS3 requirements.

Substiute Parts

T322D685K035AS

KEMETIn Stock: 968T322D685K035AS Datasheet

Current PartRFQ

T322D685K035AT

KEMETIn Stock: 939T322D685K035AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T322D685K035AS is determined by strict equivalence across the following parameters:

Mandatory Matching Parameters:

• Capacitance: 6.8 µF (exact match required)
• Voltage Rating: 35 V (exact match required)
• Tolerance: ±10% (exact match required)
• ESR: 2.5 Ohm (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Package / Case: Axial (exact match required)
• Size / Dimension: 0.180" Dia x 0.420" L (exact match required)
• Mounting Type: Through Hole (exact match required)
• Type: Molded (exact match required)

The substitute part T322D685K035AT meets all mandatory matching parameters and is classified as a direct equivalent. The primary distinction between these parts is regulatory compliance status: T322D685K035AS is RoHS non-compliant, while T322D685K035AT is RoHS3 compliant. Both parts share identical electrical and mechanical specifications, series designation (T322), and base product number (T322D).

Parameter Comparison

Engineering Selection Recommendations

T322D685K035AS Selection Criteria: Select this part number when RoHS compliance is not a design requirement and the application operates in non-regulated markets or legacy systems where RoHS3 certification is not mandated.

T322D685K035AT Selection Criteria: Select this part number for all new designs, applications subject to RoHS3 regulations, or when component sourcing must comply with European Union Directive 2011/65/EU and its amendments. This part maintains identical electrical and mechanical performance while meeting current regulatory compliance standards.

Interchangeability: Both parts are electrically and mechanically interchangeable within the specified operating parameters. Selection between them is determined solely by regulatory compliance requirements and supply chain availability. No circuit redesign or board layout modification is required when substituting between these part numbers.

Frequently Asked Questions (FAQ)

Q: Can T322D685K035AT be used as a direct replacement for T322D685K035AS?

A: Yes. Both parts are electrically and mechanically identical. They share the same capacitance (6.8 µF), voltage rating (35 V), tolerance (±10%), ESR (2.5 Ohm), operating temperature range (-55°C ~ 125°C), and physical dimensions (0.180" Dia x 0.420" L). The only difference is RoHS3 compliance status. No circuit modifications are required.

Q: What is the primary reason to substitute T322D685K035AS with T322D685K035AT?

A: The primary reason is regulatory compliance. T322D685K035AT is RoHS3 compliant, while T322D685K035AS is RoHS non-compliant. Applications subject to EU RoHS3 regulations or customer requirements mandating RoHS compliance must use T322D685K035AT.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts have identical dimensions of 0.180" Dia x 0.420" L (4.57mm x 10.67mm) and use axial through-hole mounting. PCB layout and footprints require no modification when substituting between these part numbers.

Q: Do these parts have the same ESR specification?

A: Yes. Both T322D685K035AS and T322D685K035AT have an ESR of 2.5 Ohm. Ripple current handling, thermal performance, and frequency response characteristics are identical.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of -55°C to 125°C. Environmental performance and thermal derating curves are equivalent.

Q: Can inventory of T322D685K035AS be used interchangeably with T322D685K035AT in production?

A: From an electrical and mechanical standpoint, yes. However, regulatory compliance documentation and supply chain traceability must be verified. If the end application or customer requires RoHS3 certification, only T322D685K035AT should be used in production to maintain compliance documentation.