TAS476K020P1F Equivalent & Substitute Parts

Part Overview

The TAS476K020P1F is a 47 µF hermetically sealed tantalum capacitor rated at 20 V, manufactured by Cornell Dubilier Electronics (CDE) in axial through-hole configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across a temperature range of -55°C to 125°C and is suitable for general-purpose applications requiring stable capacitance performance in compact form factors.

Key Parameters

Parameter	Value
Capacitance	47 µF
Tolerance	±10%
Voltage Rating	20 V
Type	Hermetically Sealed Tantalum
Mounting Type	Through Hole
Package / Case	Axial
Operating Temperature Range	-55°C ~ 125°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TAS476K020P1F is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance value: 47 µF (exact match required)
Tolerance: ±10% (exact match required)
Type: Hermetically sealed tantalum (exact match required)
Mounting: Through-hole axial configuration (exact match required)

Secondary Substitution Criteria:

Voltage rating: Equal to or greater than 20 V
Operating temperature range: Must support minimum -55°C to 125°C
Package classification: Axial through-hole form factor

Substitute parts are grouped into two categories: direct equivalents (matching 20 V rating) and upgrades (higher voltage ratings with enhanced thermal or reliability specifications). All substitute parts maintain the core electrical specifications of 47 µF capacitance at ±10% tolerance in hermetically sealed axial configuration.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Type	ESR (Ω)	Operating Temp (°C)	Package	Product Status
TAS476K020P1F	Cornell Dubilier Electronics	47 µF	±10%	20 V	Hermetically Sealed	—	-55 ~ 125	Axial	Obsolete
T212C476K020CS	KEMET	47 µF	±10%	20 V	Hermetically Sealed	1.2	-55 ~ 125	Axial	Active
109D476X9030C2	Vishay Sprague	47 µF	±10%	30 V	Hermetically Sealed	5.2	-55 ~ 125	Axial	Active
135D476X9030C2	Vishay Sprague	47 µF	±10%	30 V	Hermetically Sealed	5.2	-55 ~ 125	Axial	Active
135D476X9030C6	Vishay Sprague	47 µF	±10%	30 V	Hermetically Sealed	5.2	-55 ~ 200	Axial	Active
135D476X9050F2	Vishay Sprague	47 µF	±10%	50 V	Hermetically Sealed	3.7	-55 ~ 125	Axial	Active
135D476X9050F6	Vishay Sprague	47 µF	±10%	50 V	Hermetically Sealed	3.7	-55 ~ 200	Axial	Active
ST47-125T2KI	Vishay Sprague	47 µF	±10%	125 V	Hermetically Sealed	2.3	-55 ~ 125	Axial, Can	Active
ST47-60T1KI	Vishay Sprague	47 µF	±10%	60 V	Hermetically Sealed	2.0	-55 ~ 125	Axial, Can	Active

Engineering Selection Recommendations

Direct Equivalent (20 V Rating):

The T212C476K020CS from KEMET is the primary direct equivalent to the TAS476K020P1F. This part maintains identical electrical specifications (47 µF, ±10%, 20 V) and operating temperature range (-55°C to 125°C). The T212C476K020CS is manufactured to MIL-PRF-39003/1 military specifications with active product status, providing long-term availability and supply chain stability. The specified ESR of 1.2 Ω is lower than the original part, indicating improved performance characteristics. This substitute is suitable for direct replacement in applications where the 20 V rating is sufficient and military-grade reliability is required.

Voltage Upgrade Options (30 V, 50 V, 60 V, 125 V Ratings):

Higher voltage-rated substitutes are available from Vishay Sprague and provide design margin for applications operating below their rated voltage. These upgrades maintain the 47 µF capacitance and ±10% tolerance while offering increased voltage headroom:

30 V options (109D476X9030C2, 135D476X9030C2, 135D476X9030C6): Suitable for applications requiring modest voltage margin. The 135D476X9030C6 variant extends operating temperature to 200°C, providing thermal margin for high-temperature environments.
50 V options (135D476X9050F2, 135D476X9050F6): Provide significant voltage margin with lower ESR (3.7 Ω) compared to 30 V variants. The 135D476X9050F6 variant supports extended temperature operation to 200°C.
60 V and 125 V options (ST47-60T1KI, ST47-125T2KI): SuperTan® series components offering maximum voltage margin and lowest ESR values (2.0 Ω and 2.3 Ω respectively). These are suitable for demanding applications requiring superior performance characteristics.

All substitute parts are active products with established supply chains. Selection between direct equivalents and upgrades depends on circuit voltage requirements, thermal environment, and performance specifications.

Frequently Asked Questions (FAQ)

Q: Can the T212C476K020CS directly replace the TAS476K020P1F?

A: Yes. The T212C476K020CS maintains identical capacitance (47 µF), tolerance (±10%), voltage rating (20 V), and operating temperature range (-55°C to 125°C). Both are hermetically sealed tantalum capacitors in axial through-hole configuration. The T212C476K020CS is an active product with established availability.

Q: What is the difference between direct equivalents and voltage upgrades?

A: Direct equivalents (T212C476K020CS) match the original 20 V rating exactly. Voltage upgrades (30 V, 50 V, 60 V, 125 V options) provide higher voltage ratings while maintaining the same 47 µF capacitance. Upgrades are suitable when circuit design allows higher voltage-rated components and additional design margin is beneficial.

Q: Can I use a 30 V or 50 V rated capacitor in a 20 V circuit?

A: Yes. A capacitor rated for higher voltage can be used in circuits operating at lower voltages. The 30 V, 50 V, 60 V, and 125 V rated substitutes are all suitable for 20 V applications, providing additional voltage margin and design safety.

Q: What does ESR (Equivalent Series Resistance) indicate?

A: ESR is the internal resistance of the capacitor. Lower ESR values indicate better high-frequency performance and reduced heat generation. The substitute parts show ESR values ranging from 1.2 Ω to 5.2 Ω. Selection based on ESR depends on circuit frequency requirements and thermal constraints.

Q: Are there temperature-extended variants available?

A: Yes. The 135D476X9030C6 and 135D476X9050F6 variants support operating temperatures to 200°C, compared to the standard 125°C maximum. These are suitable for high-temperature applications.

Q: What is the difference between Vishay Sprague 109D and 135D series?

A: Both are Vishay Sprague hermetically sealed tantalum capacitors with identical electrical specifications for the 47 µF, 30 V rating. The 109D series (TANTALEX™) and 135D series differ in physical dimensions and internal construction. Selection depends on available board space and mechanical constraints.

Q: Are all substitute parts RoHS compliant?

A: No. All parts listed, including the original TAS476K020P1F and all substitutes, are RoHS non-compliant. This is typical for hermetically sealed tantalum capacitors. Verify RoHS requirements for your specific application before selection.

Q: What is the difference between Bulk and Tray packaging?

A: Packaging affects handling and storage. Bulk packaging is suitable for high-volume manufacturing environments. Tray packaging provides organized component storage and is common for standard production runs. Packaging selection depends on manufacturing process requirements and inventory management practices.

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