Equivalent & Substitute Parts for T356B225K025AS

Part Overview

The T356B225K025AS is a 2.2 µF conformal coated tantalum capacitor manufactured by KEMET, rated for 25 V operation in a radial through-hole package. This component belongs to the T356 UltraDip II series and is designed for general-purpose applications requiring reliable energy storage in compact form factors. The part is currently active in production with 807 units in stock. Substitute parts are identified to address inventory availability, compliance requirements, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

T356B225K025AS

KEMETIn Stock: 903T356B225K025AS Datasheet

Current PartRFQ

T356B225K025AT

KEMETIn Stock: 1959T356B225K025AT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for tantalum capacitors is determined by strict equivalence across electrical and mechanical parameters. The primary criteria for substitution are:

Electrical Parameters (Must Match Exactly):

• Capacitance value: 2.2 µF
• Voltage rating: 25 V
• Tolerance: ±10%
• ESR: 6 Ohm
• Operating temperature range: -55°C to 125°C

Mechanical Parameters (Must Match Exactly):

• Package type: Radial through-hole
• Case size: 0.177" diameter (4.50 mm)
• Height seated maximum: 0.350" (8.90 mm)
• Lead spacing: 0.200" (5.08 mm)
• Manufacturer size code: B

Functional Parameters (Must Match):

• Coating type: Conformal coated
• Series designation: T356 UltraDip II
• Application class: General purpose

The substitute part T356B225K025AT meets all electrical and mechanical requirements for direct substitution. The primary distinction between the main part and its substitute relates to regulatory compliance status, which does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

T356B225K025AS Selection Criteria:

• Use when RoHS non-compliant components are acceptable for the application
• Select when existing inventory of this specific part number is preferred
• Suitable for legacy designs or applications without RoHS requirements

T356B225K025AT Selection Criteria:

• Use for applications requiring ROHS3 compliance
• Select when higher inventory availability is advantageous for supply chain continuity
• Recommended for new designs or applications with regulatory compliance mandates

Both parts are electrically and mechanically identical. The selection between them depends solely on regulatory compliance requirements and inventory availability. No electrical performance differences exist between the two part numbers.

Frequently Asked Questions (FAQ)

Q: Can T356B225K025AT be used as a direct replacement for T356B225K025AS?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters including capacitance, voltage rating, tolerance, ESR, operating temperature range, package dimensions, and lead spacing. The only difference is RoHS compliance status.

Q: What is the difference between these two part numbers?

A: The primary difference is regulatory compliance. T356B225K025AS is RoHS non-compliant, while T356B225K025AT is ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Will the substitute part fit in the same PCB footprint?

A: Yes. Both parts share identical mechanical specifications: 0.177" diameter case, 0.350" maximum seated height, and 0.200" lead spacing. PCB layouts designed for either part are fully compatible with the other.

Q: Are there any performance differences between the two parts?

A: No. Both parts have identical capacitance (2.2 µF), voltage rating (25 V), tolerance (±10%), ESR (6 Ohm), and operating temperature range (-55°C to 125°C). Performance in circuit operation is equivalent.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, use T356B225K025AT. For applications without RoHS requirements, either part is acceptable based on availability and cost considerations.

Q: Is conformal coating present on both parts?

A: Yes. Both T356B225K025AS and T356B225K025AT are conformal coated tantalum capacitors, providing environmental protection in the same manner.

Q: What is the lead spacing for PCB design?

A: Both parts have a lead spacing of 0.200" (5.08 mm), which determines the through-hole pad spacing on the printed circuit board.