T494X687M004AT Equivalent & Substitute Parts

Part Overview

The T494X687M004AT is a 680 µF molded tantalum capacitor manufactured by KEMET, rated for 4 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 and low equivalent series resistance in compact form factors.

Substitute parts are identified when design requirements permit alternative electrical characteristics or when primary component availability is constrained. Equivalent and substitute relationships are established based on matching capacitance value, voltage rating, package dimensions, and operating temperature range, with allowable variations in ESR and manufacturer specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	680	µF
Tolerance	±20%	-
Voltage - Rated	4	V
Type	Molded Tantalum	-
ESR (Equivalent Series Resistance)	100	mOhm
Operating Temperature Range	-55 to 125	°C
Package / Case	2917 (7343 Metric)	-
Mounting Type	Surface Mount	-
Size / Dimension	7.30 x 4.30	mm
Height - Seated (Max)	4.30	mm
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the T494X687M004AT are classified into two categories based on electrical and mechanical compatibility:

Category 1: Direct Equivalents (Same Voltage Rating) Parts maintaining 4 V rated voltage with identical 680 µF capacitance, 2917 package dimensions, and -55°C to 125°C operating temperature. Substitution is permitted when ESR variation and manufacturer series differences do not impact circuit performance. Parts in this category include T510X687M004ATE030 (KEMET) and TPME687M004R0023 (KYOCERA AVX).

Category 2: Voltage Upgrade Substitutes (Higher Voltage Rating) Parts with elevated voltage rating (6.3 V) while maintaining 680 µF capacitance and 2917 package footprint. The TR3E687M6R3C0100 (Vishay Sprague) operates at 6.3 V and is substitutable in applications where the circuit voltage does not exceed 4 V, providing design margin and extended reliability.

Key Parameters Determining Substitution:

Capacitance: 680 µF (fixed)
Voltage Rating: 4 V minimum (6.3 V acceptable as upgrade)
Package: 2917 (7343 Metric) (fixed)
Operating Temperature: -55°C to 125°C (fixed)
Mounting Type: Surface Mount (fixed)
ESR: 23 to 100 mOhm (allowable range)

Parameter Comparison

Parameter	T494X687M004AT (Main)	T510X687M004ATE030	TR3E687M6R3C0100	TPME687M004R0023
Manufacturer	KEMET	KEMET	Vishay Sprague	KYOCERA AVX
Series	T494	T510	TR3 / TANTAMOUNT™	TPM
Capacitance	680 µF	680 µF	680 µF	680 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	4 V	4 V	6.3 V	4 V
Type	Molded	Molded	Molded	Molded
ESR	100 mOhm	30 mOhm	100 mOhm	23 mOhm
Operating Temperature	-55 to 125°C	-55 to 125°C	-55 to 125°C	-55 to 125°C
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Size / Dimension	7.30 x 4.30 mm	7.30 x 4.30 mm	7.30 x 4.30 mm	7.30 x 4.30 mm
Height - Seated (Max)	4.30 mm	4.30 mm	4.32 mm	4.30 mm
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

T510X687M004ATE030 (KEMET T510 Series) This substitute maintains identical electrical specifications to the main part while reducing ESR from 100 mOhm to 30 mOhm. Both components are KEMET products with Active status and ROHS3 compliance. The T510 series operates at 2000 Hrs @ 85°C lifetime rating. Selection is appropriate when lower ESR performance is required and KEMET product continuity is preferred.

TR3E687M6R3C0100 (Vishay Sprague TANTAMOUNT™ Series) This component provides a voltage upgrade from 4 V to 6.3 V while maintaining 680 µF capacitance and identical package dimensions. The higher voltage rating permits operation in circuits designed for 4 V with increased design margin. ESR remains at 100 mOhm, matching the main part. All compliance certifications (ROHS3, REACH Unaffected) are equivalent. Selection is appropriate for applications requiring enhanced voltage headroom or when Vishay Sprague supply chain preference exists.

TPME687M004R0023 (KYOCERA AVX TPM Series) This substitute matches the 4 V voltage rating and 680 µF capacitance with reduced ESR of 23 mOhm, the lowest among all substitutes. KYOCERA AVX product status is Active with ROHS3 compliance. Moisture Sensitivity Level is MSL 3 (168 Hours), requiring controlled storage conditions compared to MSL 1 of the main part. Selection is appropriate when lowest ESR performance is prioritized and MSL 3 handling procedures are implemented.

Frequently Asked Questions (FAQ)

Q: Can T510X687M004ATE030 be used as a direct replacement for T494X687M004AT?

A: Yes. Both components share identical capacitance (680 µF), voltage rating (4 V), package (2917), and operating temperature range (-55°C to 125°C). The T510 series features lower ESR (30 mOhm vs. 100 mOhm), which improves performance in applications sensitive to impedance. Both are KEMET products with Active status and ROHS3 compliance.

Q: What is the difference between the main part and TR3E687M6R3C0100?

A: The primary difference is voltage rating: TR3E687M6R3C0100 is rated for 6.3 V compared to 4 V for T494X687M004AT. Capacitance, package dimensions, and ESR are identical. The higher voltage rating provides design margin and is substitutable in 4 V circuits. Physical height differs slightly (4.32 mm vs. 4.30 mm), which is negligible for most PCB layouts.

Q: Is TPME687M004R0023 compatible with the original part?

A: Yes, with one consideration. TPME687M004R0023 matches capacitance, voltage, package, and temperature range. ESR is lower (23 mOhm). However, Moisture Sensitivity Level is MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the main part. This requires controlled storage and handling procedures during assembly. Electrical performance is compatible.

Q: Can I use TR3E687M6R3C0100 in a 4 V circuit?

A: Yes. The 6.3 V rating is a voltage upgrade and operates safely in 4 V circuits. The component will not be stressed and provides additional reliability margin. No circuit modifications are required.

Q: What does ESR variation mean for circuit performance?

A: ESR (Equivalent Series Resistance) affects impedance and ripple current handling. Lower ESR (23-30 mOhm) reduces voltage ripple and heat generation, beneficial in high-frequency or high-current applications. Higher ESR (100 mOhm) is acceptable in general-purpose, low-frequency circuits. Selection depends on circuit requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes—T510X687M004ATE030, TR3E687M6R3C0100, and TPME687M004R0023—are ROHS3 compliant and REACH Unaffected, matching the main part's environmental compliance status.

Q: What is the significance of MSL rating differences?

A: MSL 1 (Unlimited) permits indefinite storage without moisture absorption concerns. MSL 3 (168 Hours) requires components to be used within 168 hours of package opening or stored in controlled humidity environments. TPME687M004R0023 requires MSL 3 handling; other parts do not.

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