T322B155K025AT Equivalent & Substitute Parts

Part Overview

The T322B155K025AT is a 1.5 µF molded tantalum capacitor manufactured by KEMET, rated for 25 V operation in an axial through-hole package. This component is classified as Active product status and is designed for general-purpose applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining functional compatibility within specified electrical constraints.

Substiute Parts

T322B155K025AT

KEMETIn Stock: 951T322B155K025AT Datasheet

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T322B155K035AT

KEMETIn Stock: 1183T322B155K035AT Datasheet

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173D155X9035VWE3

Vishay SpragueIn Stock: 3307173D155X9035VWE3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T322B155K025AT are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility Criteria:

• Capacitance value: 1.5 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating: Equal to or greater than 25 V (higher voltage ratings provide operational margin)
• Type: Molded tantalum (material and construction consistency)
• Operating temperature range: -55°C to 125°C (exact match required)

Mechanical Compatibility Criteria:

• Mounting type: Through Hole (axial configuration)
• Package / Case: Axial (physical form factor)
• Size / Dimension: 0.110" Dia x 0.290" L (2.79mm x 7.37mm) (board layout compatibility)

Regulatory Compliance Criteria:

• RoHS3 Compliant status
• REACH Unaffected status

Substitute parts meeting all electrical and mechanical parameters are classified as direct equivalents. Parts with elevated voltage ratings (35 V versus 25 V) are acceptable substitutes when circuit design permits higher voltage operation, as this provides additional safety margin without compromising functional performance at the original 25 V specification.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain Active product status and full regulatory compliance (ROHS3 Compliant, REACH Unaffected) consistent with the main part T322B155K025AT.

T322B155K035AT (KEMET): This substitute provides identical capacitance (1.5 µF), tolerance (±10%), and physical dimensions while offering an elevated voltage rating of 35 V compared to the original 25 V specification. The ESR is reduced to 6 Ohm from 8 Ohm, indicating improved high-frequency performance characteristics. This part is suitable for direct substitution in applications where the circuit design permits operation at 35 V or where lower ESR is beneficial. Manufacturer consistency with the main part supports supply chain standardization.

173D155X9035VWE3 (Vishay Sprague TANTALEX™ 173D Series): This substitute provides identical capacitance (1.5 µF), tolerance (±10%), and physical dimensions with a 35 V voltage rating. The part is supplied in Cut Tape (CT) packaging format, which differs from the Bulk packaging of the main part. ESR specification is not provided for this component. This part is suitable for direct substitution in applications where the circuit design permits operation at 35 V and where Cut Tape packaging is compatible with assembly processes.

Selection between substitutes depends on packaging requirements (Bulk versus Cut Tape), manufacturer preference, and ESR performance criteria specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can T322B155K035AT be used as a direct replacement for T322B155K025AT?

A: Yes. Both parts share identical capacitance (1.5 µF), tolerance (±10%), operating temperature range (-55°C to 125°C), physical dimensions (0.110" Dia x 0.290" L), and axial through-hole mounting configuration. The T322B155K035AT operates at 35 V, which is higher than the original 25 V specification. This elevated voltage rating is compatible with circuits designed for 25 V operation, as the component will operate within its rated specifications at lower applied voltages. The reduced ESR (6 Ohm versus 8 Ohm) provides improved performance characteristics.

Q: Can 173D155X9035VWE3 be used as a direct replacement for T322B155K025AT?

A: Yes. Both parts share identical capacitance (1.5 µF), tolerance (±10%), operating temperature range (-55°C to 125°C), physical dimensions (0.110" Dia x 0.290" L), and axial through-hole mounting configuration. The 173D155X9035VWE3 operates at 35 V, which is higher than the original 25 V specification. This elevated voltage rating is compatible with circuits designed for 25 V operation. The primary difference is packaging format: 173D155X9035VWE3 is supplied in Cut Tape (CT) format, while T322B155K025AT is supplied in Bulk format.

Q: What is the significance of the voltage rating difference between 25 V and 35 V?

A: The voltage rating indicates the maximum continuous voltage the capacitor can withstand. A 35 V rated capacitor can safely operate at any voltage up to 35 V. When a 35 V rated part is used in a circuit designed for 25 V operation, the component operates with additional voltage margin, which does not negatively affect performance. The capacitance value, tolerance, and temperature characteristics remain unchanged.

Q: Does ESR (Equivalent Series Resistance) affect substitution compatibility?

A: ESR is a performance characteristic that influences high-frequency behavior and ripple current handling. The main part T322B155K025AT specifies 8 Ohm ESR, while T322B155K035AT specifies 6 Ohm ESR. Lower ESR generally indicates better high-frequency performance. The 173D155X9035VWE3 does not provide ESR specification. If ESR is a critical parameter for the application circuit, the specified ESR values must be evaluated against circuit requirements.

Q: Are there packaging compatibility considerations?

A: Yes. T322B155K025AT and T322B155K035AT are supplied in Bulk packaging, while 173D155X9035VWE3 is supplied in Cut Tape (CT) packaging. Bulk packaging is suitable for manual assembly or loose component handling, while Cut Tape packaging is optimized for automated pick-and-place assembly processes. Selection depends on the assembly method and handling requirements of the manufacturing process.

Q: Do all substitute parts meet the same regulatory compliance standards?

A: Yes. All three parts (T322B155K025AT, T322B155K035AT, and 173D155X9035VWE3) are ROHS3 Compliant and REACH Unaffected, ensuring consistent regulatory compliance across substitution options.

Q: What is the difference between KEMET T322 series and Vishay Sprague TANTALEX™ 173D series?

A: Both are molded tantalum capacitor series with identical electrical specifications for this application (1.5 µF, ±10%, 35 V, -55°C to 125°C). The primary differences are manufacturer identity and packaging format. KEMET T322B155K035AT is supplied in Bulk format, while Vishay Sprague 173D155X9035VWE3 is supplied in Cut Tape format. Both maintain Active product status and full regulatory compliance.