Equivalent & Substitute Parts for T520D477M004ASE025

Part Overview

The T520D477M004ASE025 is a 470 µF molded tantalum polymer capacitor rated at 4 V, manufactured by KEMET in the KO-CAP® T520 series. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement. The part is housed in a 2917 (7343 Metric) surface mount package with an ESR of 25 mOhm @ 100 kHz and operates across a temperature range of -55°C to 105°C with a rated lifetime of 2000 hours at 105°C.

Key Parameters

Parameter	Value
Capacitance	470 µF
Voltage Rating	4 V
Type	Molded Tantalum Polymer
Package / Case	2917 (7343 Metric)
ESR @ 100 kHz	25 mOhm
Operating Temperature Range	-55°C to 105°C
Lifetime @ 105°C	2000 Hours
Tolerance	±20%
Mounting Type	Surface Mount
Moisture Sensitivity Level	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the T520D477M004ASE025 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 470 µF
Voltage Rating: 4 V
Package / Case: 2917 (7343 Metric)
ESR @ 100 kHz: 25 mOhm
Operating Temperature Range: -55°C to 105°C
Lifetime @ 105°C: 2000 Hours
Tolerance: ±20%
Mounting Type: Surface Mount

All substitute parts listed below meet these electrical and mechanical specifications. Substitute parts are categorized as either direct manufacturer equivalents (same manufacturer, different packaging or product status) or parametric equivalents (different manufacturers with identical electrical and mechanical characteristics).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	ESR @ 100 kHz	Package	Height (Max)	Product Status	RoHS Status	Inventory
T520D477M004ASE025	KEMET	KO-CAP® T520	470 µF	4 V	25 mOhm	2917 (7343)	0.122" (3.10 mm)	Obsolete	Non-compliant	840 Pcs
T520D477M004ATE025	KEMET	KO-CAP® T520	470 µF	4 V	25 mOhm	2917 (7343)	0.122" (3.10 mm)	Active	ROHS3 Compliant	1916 Pcs
4TAE470ML	Panasonic Electronic Components	POSCAP™ TA	470 µF	4 V	25 mOhm	2917 (7343)	0.118" (3.00 mm)	Active	ROHS3 Compliant	1957 Pcs
4TPE470ML	Panasonic Electronic Components	POSCAP™ TPE	470 µF	4 V	25 mOhm	2917 (7343)	0.118" (3.00 mm)	Active	ROHS3 Compliant	2798 Pcs
TCJY477M004R0025E	KYOCERA AVX	TCJ	470 µF	4 V	25 mOhm	2917 (7343)	0.079" (2.00 mm)	Active	ROHS3 Compliant	900 Pcs
TCJD477M004R0025	KYOCERA AVX	TCJ	470 µF	4 V	25 mOhm	2917 (7343)	0.122" (3.10 mm)	Active	ROHS3 Compliant	2338 Pcs
TCJD477M004R0025E	KYOCERA AVX	TCJ	470 µF	4 V	25 mOhm	2917 (7343)	0.122" (3.10 mm)	Active	ROHS3 Compliant	877 Pcs

Engineering Selection Recommendations

Primary Recommendation: T520D477M004ATE025

The T520D477M004ATE025 is the direct KEMET equivalent to the obsolete T520D477M004ASE025. Both parts share identical electrical specifications, package dimensions, and thermal characteristics. The primary distinction is product status: T520D477M004ATE025 is active and ROHS3 compliant, whereas the original part is obsolete and RoHS non-compliant. This part is supplied in Tape & Reel packaging and maintains design continuity within the KO-CAP® T520 series. Inventory availability is 1916 units.

Secondary Recommendations: Panasonic POSCAP™ Series

The 4TPE470ML and 4TAE470ML from Panasonic Electronic Components are parametric equivalents meeting all electrical and mechanical requirements. Both are active products with ROHS3 compliance. The 4TPE470ML offers the highest inventory availability at 2798 units. These parts feature a slightly reduced seated height of 0.118" (3.00 mm) compared to the original 0.122" (3.10 mm), which may provide board layout advantages in space-constrained applications.

Tertiary Recommendations: KYOCERA AVX TCJ Series

The TCJD477M004R0025, TCJD477M004R0025E, and TCJY477M004R0025E from KYOCERA AVX are parametric equivalents with active product status and ROHS3 compliance. The TCJD variants maintain the original seated height of 0.122" (3.10 mm). The TCJY477M004R0025E offers a reduced height of 0.079" (2.00 mm), suitable for applications requiring minimal vertical clearance. Inventory levels range from 877 to 2338 units across the TCJ series options.

All substitute parts are surface mount components in the 2917 (7343 Metric) package with identical capacitance, voltage rating, ESR, operating temperature range, and lifetime specifications.

Frequently Asked Questions (FAQ)

Q: Can T520D477M004ATE025 be used as a direct replacement for T520D477M004ASE025?

A: Yes. Both parts are KEMET KO-CAP® T520 series components with identical electrical and mechanical specifications. The primary difference is that T520D477M004ATE025 is active and ROHS3 compliant, while T520D477M004ASE025 is obsolete. The packaging format differs (Tape & Reel versus the original format), but electrical performance is equivalent.

Q: What is the difference between the Panasonic 4TPE470ML and 4TAE470ML?

A: Both parts are Panasonic molded tantalum polymer capacitors with identical electrical specifications (470 µF, 4 V, 25 mOhm ESR). The primary distinction is the series designation: 4TPE470ML belongs to the POSCAP™ TPE series, while 4TAE470ML belongs to the POSCAP™ TA series. Both are active products with ROHS3 compliance and equivalent performance characteristics.

Q: Are there height differences between substitute parts?

A: Yes. The original T520D477M004ASE025 has a seated height of 0.122" (3.10 mm). Panasonic parts (4TPE470ML and 4TAE470ML) have a seated height of 0.118" (3.00 mm). The KYOCERA AVX TCJY477M004R0025E has a seated height of 0.079" (2.00 mm), while TCJD variants maintain 0.122" (3.10 mm). Height differences must be evaluated against board layout and clearance requirements.

Q: Do all substitute parts meet RoHS compliance requirements?

A: All active substitute parts listed (T520D477M004ATE025, 4TAE470ML, 4TPE470ML, TCJY477M004R0025E, TCJD477M004R0025, and TCJD477M004R0025E) are ROHS3 compliant. The original T520D477M004ASE025 is RoHS non-compliant.

Q: What is the Moisture Sensitivity Level (MSL) for these parts?

A: The original part and all KEMET and KYOCERA AVX substitutes are rated MSL 3 (168 Hours). Panasonic part specifications do not explicitly list MSL in the provided data.

Q: Which substitute part has the highest inventory availability?

A: The Panasonic 4TPE470ML has the highest inventory at 2798 units, followed by KYOCERA AVX TCJD477M004R0025 at 2338 units.

Q: Are all substitute parts surface mount components?

A: Yes. All parts listed are surface mount devices in the 2917 (7343 Metric) package format.

Q: Can substitute parts be mixed in the same design?

A: All substitute parts meet identical electrical and mechanical specifications for capacitance, voltage, ESR, operating temperature, and lifetime. However, height variations and manufacturer-specific characteristics should be evaluated for specific board layout and thermal management requirements.

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