KEMET T520V157M006ASE040 Equivalent & Substitute Parts

Part Overview

The KEMET T520V157M006ASE040 is a 150 µF molded tantalum polymer capacitor rated at 6.3 V with 40 mOhm equivalent series resistance (ESR) at 100 kHz, housed in a 2917 (7343 Metric) surface mount package. This part is classified as obsolete and has been superseded by active production alternatives within the KO-CAP® T520 series. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value	Unit
Capacitance	150	µF
Voltage - Rated	6.3	V
ESR @ 100 kHz	40	mOhm
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55 to 105	°C
Lifetime @ 105°C	2000	Hrs
Type	Molded
Tolerance	±20	%
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the obsolete T520V157M006ASE040 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

Capacitance: 150 µF
Voltage Rating: 6.3 V
ESR: 40 mOhm @ 100 kHz
Operating Temperature: -55°C to 105°C
Lifetime: 2000 Hrs @ 105°C

Mechanical Parameters (Must Match):

Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Tolerance: ±20%
Type: Molded Tantalum Polymer

Allowed Variations:

Packaging format (Tape & Reel vs. bulk)
Manufacturer size code (V vs. W)
Height seated maximum (within mechanical compatibility)
RoHS compliance status (newer parts are ROHS3 compliant)
Product status (active vs. obsolete)

All substitute parts listed maintain identical electrical performance and mechanical fit within the specified 2917 package envelope.

Parameter Comparison

Part Number	Capacitance (µF)	Voltage (V)	ESR @ 100kHz (mOhm)	Package	Height Max (mm)	Size Code	Product Status	RoHS Status	Inventory (Pcs)
T520V157M006ASE040	150	6.3	40	2917	1.90	V	Obsolete	Non-compliant	1019
T520V157M006ATE040	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	2400
T520W157M006ATE040	150	6.3	40	2917	1.50	W	Active	ROHS3 Compliant	1099
T520V157M006ATE0402478	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	1008
T520V157M006ATE0407608	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	889
T520V157M006ATE0408000	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	1042
T520V157M006ATE040E025	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	998
T520V157M006ATE040Z147	150	6.3	40	2917	1.90	V	Active	Not specified	651
T520V157M006ATE040Z150	150	6.3	40	2917	1.90	V	Active	Not specified	1064
T520V157M006ATE040Z159	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	1126
T520V157M006ATE040Z160	150	6.3	40	2917	1.90	V	Active	ROHS3 Compliant	1139

Engineering Selection Recommendations

Primary Recommendation: T520V157M006ATE040

This part is the direct active equivalent to the obsolete T520V157M006ASE040. It maintains identical electrical specifications (150 µF, 6.3 V, 40 mOhm ESR) and mechanical form factor (2917 package, 1.90 mm height). The part is in active production status with ROHS3 compliance and highest inventory availability (2400 units). This is the preferred choice for new designs and production continuity.

Secondary Recommendation: T520V157M006ATE040Z160

This variant provides the same electrical and mechanical performance as the primary recommendation with ROHS3 compliance and active product status. Inventory is adequate (1139 units) for production requirements.

Alternative for Space-Constrained Applications: T520W157M006ATE040

The size code W variant offers a reduced seated height of 1.50 mm compared to 1.90 mm for size code V variants. This part maintains all electrical specifications and is suitable for applications with vertical space constraints. Product status is active with ROHS3 compliance and 1099 units in stock.

Parametric Equivalents with Traceability Codes:

Parts T520V157M006ATE0402478, T520V157M006ATE0407608, and T520V157M006ATE0408000 are parametric equivalents with internal traceability identifiers. These parts carry identical electrical and mechanical specifications to the primary recommendation and are suitable for applications requiring documented part genealogy or specific manufacturing lot tracking.

Compliance Consideration:

The original T520V157M006ASE040 is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant, meeting current regulatory requirements for new production and export to regulated markets.

Frequently Asked Questions (FAQ)

Q: Can T520W157M006ATE040 be used as a direct replacement for T520V157M006ASE040?

A: Yes, with mechanical verification. The T520W157M006ATE040 provides identical electrical performance (150 µF, 6.3 V, 40 mOhm ESR) and fits the same 2917 package footprint. The difference is seated height: 1.50 mm (W code) versus 1.90 mm (V code). Verify that the reduced height does not conflict with PCB layout or component clearance requirements.

Q: What is the difference between T520V157M006ATE040 and the Z-series variants (Z147, Z150, Z159, Z160)?

A: All variants maintain identical electrical specifications and mechanical dimensions. The suffix codes (Z147, Z150, Z159, Z160) represent internal KEMET manufacturing traceability or lot identifiers. Electrical and mechanical performance is equivalent across all variants. Selection can be based on inventory availability and supply chain requirements.

Q: Are the parametric equivalent parts (with codes 2478, 7608, 8000) interchangeable with T520V157M006ATE040?

A: Yes. These parts carry identical capacitance (150 µF), voltage rating (6.3 V), ESR (40 mOhm @ 100 kHz), package (2917), and operating temperature range (-55°C to 105°C). The numeric suffixes are internal manufacturing identifiers and do not affect electrical or mechanical compatibility.

Q: What is the impact of switching from the obsolete T520V157M006ASE040 to an active substitute?

A: The primary change is RoHS compliance status. The original part is RoHS non-compliant; all active substitutes are ROHS3 compliant. Electrical performance, thermal characteristics, and mechanical fit remain unchanged. No circuit redesign is required.

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

A: The provided data specifies general purpose features and standard MSL rating (3, 168 hours). No military grade, high-reliability, or extended temperature specifications are documented for these parts. Consult KEMET technical documentation or contact the manufacturer for applications requiring MIL-SPEC or high-reliability certification.

Q: What is the significance of the ±20% capacitance tolerance?

A: The ±20% tolerance indicates that actual capacitance values will fall within the range of 120 µF to 180 µF. This tolerance is standard for tantalum polymer capacitors and is suitable for general purpose filtering and energy storage applications. Applications requiring tighter tolerance should specify alternative part families.

Q: How does ESR affect circuit performance?

A: The 40 mOhm ESR at 100 kHz determines the impedance characteristics and ripple current handling capability. All listed substitutes maintain this specification, ensuring equivalent performance in power supply filtering, decoupling, and transient response applications. No circuit performance degradation occurs when substituting between parts with matching ESR values.

Q: Is Tape & Reel packaging compatible with the original bulk packaging?

A: Yes, from an electrical and mechanical standpoint. Tape & Reel packaging is a supply format difference only. The component itself is identical. Tape & Reel format is standard for automated assembly processes. Verify that your assembly equipment supports the reel specifications if transitioning from bulk to Tape & Reel supply.

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