T494B225M035AT Equivalent & Substitute Parts

Part Overview

The T494B225M035AT is a molded tantalum capacitor manufactured by KEMET, rated at 2.2 µF capacitance with 35 V voltage rating in a 1411 (3528 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same package footprint and voltage rating, ensuring direct board-level compatibility without design modification.

Substiute Parts

T494B225M035AT

KEMETIn Stock: 1171T494B225M035AT Datasheet

Current PartRFQ

TCKIV225BT

Cal-Chip Electronics, Inc.In Stock: 19108TCKIV225BT Datasheet

Parametric EquivalentRFQ

TCMIV225BT

Cal-Chip Electronics, Inc.In Stock: 18867TCMIV225BT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the T494B225M035AT is determined by strict adherence to the following parameters:

Critical Parameters (Must Match Exactly):

• Capacitance: 2.2 µF
• Voltage Rating: 35 V
• Package / Case: 1411 (3528 Metric)
• Mounting Type: Surface Mount
• Type: Molded Tantalum
• Operating Temperature Range: -55°C to 125°C
• Lifetime @ 125°C: 2000 Hrs
• Moisture Sensitivity Level: 1 (Unlimited)
• RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

• Tolerance: ±10% or ±20% (both acceptable within circuit design margins)
• ESR (Equivalent Series Resistance): Variation permitted within application-specific limits

The identified substitute parts TCKIV225BT and TCMIV225BT meet all critical parameters. Both are manufactured by Cal-Chip Electronics, Inc., maintain identical capacitance, voltage rating, package dimensions, and thermal specifications as the primary part.

Parameter Comparison

Engineering Selection Recommendations

Both TCKIV225BT and TCMIV225BT are qualified substitutes for the T494B225M035AT based on parametric equivalence and regulatory compliance.

TCMIV225BT provides the closest functional match, maintaining identical capacitance tolerance (±20%) and voltage rating. This part is recommended for direct replacement in applications where the original KEMET T494B225M035AT specification is required.

TCKIV225BT offers tighter capacitance tolerance (±10%) while maintaining all other critical parameters. This variant is suitable for applications requiring improved capacitance accuracy, provided circuit design accommodates the higher ESR specification (4.2 Ohm versus 2.5 Ohm).

All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. Product status is Active for all candidates, confirming ongoing availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can TCKIV225BT or TCMIV225BT be used as direct replacements for T494B225M035AT on existing PCBs?

A: Yes. Both substitute parts share identical package dimensions (1411 / 3528 Metric), footprint, and mounting type (Surface Mount). No PCB layout modification is required for board-level substitution.

Q: What is the difference between TCKIV225BT and TCMIV225BT?

A: The primary difference is capacitance tolerance. TCKIV225BT specifies ±10% tolerance, while TCMIV225BT specifies ±20% tolerance. Both maintain 2.2 µF nominal capacitance and 35 V voltage rating. ESR is identical at 4.2 Ohm for both parts.

Q: How does ESR variation affect circuit performance?

A: The T494B225M035AT specifies 2.5 Ohm ESR @ 100kHz, while both substitute parts specify 4.2 Ohm ESR. ESR differences impact ripple current handling and thermal performance. Circuit design must confirm that the higher ESR of substitute parts remains within application requirements.

Q: Are all three parts RoHS compliant?

A: Yes. T494B225M035AT, TCKIV225BT, and TCMIV225BT are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special desiccant or humidity control requirements.

Q: Can tolerance differences affect circuit functionality?

A: Capacitance tolerance affects circuit performance in applications sensitive to exact capacitance values. TCKIV225BT (±10%) provides tighter tolerance than both T494B225M035AT and TCMIV225BT (±20%). Circuit design must confirm acceptable tolerance range for the intended application.