T491C476M016AT4021 Molded Tantalum Capacitor 47µF 16V Equivalent & Substitute Parts

Part Overview

The T491C476M016AT4021 is a 47 µF molded tantalum capacitor manufactured by KEMET, rated for 16 V with ±20% tolerance. This surface mount component in 2312 (6032 Metric) package is designed for general purpose applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C. The part is ROHS3 compliant and carries MSL 1 (Unlimited) moisture sensitivity rating. Substitute parts are identified when design requirements necessitate alternative manufacturers, improved electrical characteristics, or enhanced availability while maintaining functional equivalence within specified electrical and mechanical parameters.

Substiute Parts

T491C476M016AT4021

KEMETIn Stock: 816T491C476M016AT4021 Datasheet

Current PartRFQ

T491C476K016AT7280

KEMETIn Stock: 3786T491C476K016AT7280 Datasheet

Parametric EquivalentRFQ

T494C476M016AT

KEMETIn Stock: 975T494C476M016AT Datasheet

Parametric EquivalentRFQ

T495C476M016ATE350

KEMETIn Stock: 2368T495C476M016ATE350 Datasheet

Parametric EquivalentRFQ

TAJC476K016RNJV

KYOCERA AVXIn Stock: 9750TAJC476K016RNJV Datasheet

Parametric EquivalentRFQ

TCKIC476CT

Cal-Chip Electronics, Inc.In Stock: 21161TCKIC476CT Datasheet

Parametric EquivalentRFQ

TCMIC476CT

Cal-Chip Electronics, Inc.In Stock: 20978TCMIC476CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T491C476M016AT4021 are classified based on strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance: 47 µF (exact match required)
• Voltage Rating: 16 V (exact match required)
• Package / Case: 2312 (6032 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature: -55°C to 125°C (exact match required)
• Type: Molded Tantalum (exact match required)

Secondary Variation Parameters (Allowed Differences):

• Tolerance: ±20% or ±10% (tighter tolerance acceptable)
• ESR (Equivalent Series Resistance): 1 Ohm, 500 mOhm @ 100kHz, or 350 mOhm @ 100kHz (lower ESR acceptable)
• Manufacturer: KEMET, KYOCERA AVX, or Cal-Chip Electronics, Inc.
• Moisture Sensitivity Level: MSL 1 or MSL 3 (both acceptable for general purpose applications)
• Series designation: T491, T494, T495, TAJ, or TC (different series within same manufacturer or cross-manufacturer equivalents)

Substitutes are valid when all primary criteria match exactly and secondary parameters remain within acceptable ranges for the application.

Parameter Comparison

Engineering Selection Recommendations

KEMET Series T491 and T494/T495 Alternatives: The T491C476K016AT7280 provides tighter ±10% tolerance while maintaining identical ESR and MSL characteristics. The T494C476M016AT and T495C476M016ATE350 offer reduced ESR specifications (500 mOhm and 350 mOhm respectively at 100kHz) compared to the main part's 1 Ohm rating, suitable for applications requiring lower impedance performance. All KEMET variants maintain MSL 1 rating and ROHS3 compliance.

Cross-Manufacturer Alternatives: The TAJC476K016RNJV from KYOCERA AVX meets all primary electrical specifications with ±10% tolerance and 500 mOhm ESR. This part carries MSL 3 (168 Hours) moisture sensitivity, requiring controlled storage conditions compared to the MSL 1 main part. ROHS3 compliance is maintained.

The Cal-Chip Electronics TCKIC476CT and TCMIC476CT parts provide equivalent electrical performance with 500 mOhm ESR and MSL 1 rating. TCKIC476CT offers ±10% tolerance while TCMIC476CT matches the ±20% tolerance of the main part. Both maintain ROHS3 compliance and unlimited moisture sensitivity handling.

Selection Basis: All substitute parts are ROHS3 compliant and REACH unaffected. Selection between alternatives depends on tolerance requirements, ESR specifications for the application, and inventory availability. MSL 1 parts (KEMET T491/T494/T495 series and Cal-Chip TC series) require no special moisture control. MSL 3 parts (KYOCERA AVX TAJ series) require controlled storage per IPC-A-610 standards.

Frequently Asked Questions (FAQ)

Q: Can I substitute T491C476M016AT4021 with T491C476K016AT7280? A: Yes. Both parts are KEMET T491 series with identical 47 µF, 16 V, 2312 package, and operating temperature specifications. The substitute has ±10% tolerance versus ±20%, which is a tighter specification acceptable for the main part application. ESR and MSL ratings are identical.

Q: What is the difference between KEMET T494 and T495 series substitutes? A: Both T494C476M016AT and T495C476M016ATE350 are KEMET molded tantalum capacitors with 47 µF, 16 V, ±20% tolerance in 2312 package. The primary difference is ESR: T494 specifies 500 mOhm @ 100kHz while T495 specifies 350 mOhm @ 100kHz. Lower ESR in T495 reduces impedance at high frequencies.

Q: Can I use TAJC476K016RNJV from KYOCERA AVX as a direct substitute? A: Yes, with moisture handling consideration. TAJC476K016RNJV matches all primary electrical specifications (47 µF, 16 V, 2312 package, -55°C to 125°C). It carries MSL 3 rating versus MSL 1 on the main part, requiring storage in controlled humidity conditions (168 hours maximum exposure above 30% RH before reflow). ROHS3 compliance is maintained.

Q: What are the advantages of Cal-Chip Electronics TC series parts? A: TCKIC476CT and TCMIC476CT provide equivalent 47 µF, 16 V specifications in 2312 package with MSL 1 (unlimited) moisture sensitivity. Both offer 500 mOhm ESR and ROHS3 compliance. TCKIC476CT provides ±10% tolerance while TCMIC476CT matches the ±20% tolerance of the main part. Inventory availability is significantly higher (21,125 and 20,890 pcs respectively).

Q: Are all substitutes suitable for the same PCB assembly process? A: Yes. All substitute parts are surface mount components in identical 2312 (6032 Metric) package with matching dimensions (0.236" L x 0.126" W, 2.80mm max height). MSL 1 parts require standard handling. MSL 3 parts (TAJC476K016RNJV) require bake-out per IPC-A-610 if moisture absorption exceeds limits.

Q: Can I mix different substitute parts in the same design? A: Yes, provided the application tolerates the parameter variations. Designs accepting ±20% tolerance can use TCMIC476CT or main part T491C476M016AT4021. Designs requiring ±10% tolerance should use T491C476K016AT7280, TCKIC476CT, or TAJC476K016RNJV. ESR differences (1 Ohm, 500 mOhm, 350 mOhm) affect high-frequency performance; verify compatibility with circuit requirements.

Q: What compliance certifications apply to all substitutes? A: All listed substitute parts are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for all parts. HTSUS codes are 8532.21.0050 (KEMET and KYOCERA AVX) or 8532.21.0020 (Cal-Chip Electronics).