T491D336M016AT4021 Equivalent & Substitute Parts

Part Overview

The T491D336M016AT4021 is a 33 µF molded tantalum capacitor manufactured by KEMET, rated for 16 V operation in a 2917 (7343 Metric) surface mount 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 due to inventory constraints, supply chain considerations, or design flexibility within specified tolerance ranges.

Substiute Parts

T491D336M016AT4021

KEMETIn Stock: 950T491D336M016AT4021 Datasheet

Current PartRFQ

TAJD336K016SNJ

KYOCERA AVXIn Stock: 3424TAJD336K016SNJ Datasheet

Parametric EquivalentRFQ

TCKIC336DT

Cal-Chip Electronics, Inc.In Stock: 12641TCKIC336DT Datasheet

Parametric EquivalentRFQ

TCMIC336DT

Cal-Chip Electronics, Inc.In Stock: 12359TCMIC336DT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491D336M016AT4021 are qualified based on the following criteria:

Primary Matching Parameters:

• Capacitance: 33 µF (exact match required)
• Voltage Rating: 16 V (exact match required)
• Package / Case: 2917 (7343 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Type: Molded Tantalum (exact match required)

Secondary Allowable Variations:

• Tolerance: ±20% or ±10% (both acceptable for general purpose applications)
• ESR (Equivalent Series Resistance): 800 mOhm to 900 mOhm (within acceptable range for this application class)
• Lifetime @ Temperature: 2000 Hrs @ 125°C (consistent across all qualified substitutes)

Compliance Requirements:

• RoHS3 Compliant (mandatory)
• Moisture Sensitivity Level 1 (mandatory)
• REACH Unaffected (mandatory)

All identified substitute parts meet these criteria and are interchangeable at the circuit board assembly level.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are Active product status components with full RoHS3 compliance and REACH Unaffected designation, ensuring regulatory compliance for current and future applications.

TAJD336K016SNJ (KYOCERA AVX): This substitute offers improved tolerance specification at ±10% compared to the primary part's ±20%, with slightly elevated ESR of 900 mOhm at 100 kHz. This part is suitable for applications where tighter capacitance tolerance is beneficial.

TCKIC336DT (Cal-Chip Electronics, Inc.): This substitute maintains ±10% tolerance with 900 mOhm ESR. It provides an alternative sourcing option with high inventory availability.

TCMIC336DT (Cal-Chip Electronics, Inc.): This substitute matches the original part's ±20% tolerance specification with 900 mOhm ESR. It is functionally equivalent to the primary part and provides an alternative sourcing option.

All substitute parts maintain identical mechanical dimensions, thermal performance, and compliance certifications, enabling direct substitution at the assembly level without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can TAJD336K016SNJ replace T491D336M016AT4021 in production?

A: Yes. TAJD336K016SNJ is a parametric equivalent with matching capacitance (33 µF), voltage rating (16 V), package (2917), operating temperature range (-55°C to 125°C), and compliance certifications. The ±10% tolerance is tighter than the original ±20%, which is acceptable for general purpose applications.

Q: What is the difference between TCKIC336DT and TCMIC336DT?

A: Both parts are manufactured by Cal-Chip Electronics, Inc. and are identical in all electrical and mechanical parameters except tolerance: TCKIC336DT specifies ±10% tolerance, while TCMIC336DT specifies ±20% tolerance. Both are direct substitutes for the primary part.

Q: Are all substitute parts in the same physical package?

A: Yes. All substitute parts use the 2917 (7343 Metric) surface mount package with identical dimensions (0.287" L x 0.169" W / 7.30mm x 4.30mm) and maximum seated height (0.122" / 3.10mm). They are mechanically interchangeable on PCB layouts designed for the original part.

Q: Do substitute parts have the same ESR specification?

A: The primary part T491D336M016AT4021 specifies 800 mOhm ESR. All substitute parts specify 900 mOhm ESR. This 100 mOhm difference is within acceptable limits for general purpose tantalum capacitor applications and does not affect circuit functionality in standard filtering and energy storage applications.

Q: Are all parts RoHS3 compliant?

A: Yes. All parts listed, including the primary part and all substitutes, are RoHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited) and REACH Unaffected status.

Q: Can these parts be used interchangeably in high-reliability applications?

A: All parts are Active product status with identical lifetime specifications (2000 Hrs @ 125°C) and operating temperature ranges (-55°C to 125°C). Interchangeability is determined by circuit requirements for tolerance, ESR, and voltage derating margins. Consult application-specific reliability requirements.