T491C107M010ZTAC00 Equivalent & Substitute Parts

Part Overview

The T491C107M010ZTAC00 is a 100 µF molded tantalum capacitor rated at 10 V with ±20% tolerance, manufactured by KEMET in the 2312 (6032 Metric) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part features 1 Ohm equivalent series resistance (ESR), operates across -55°C to 125°C, and maintains 2000 hours lifetime at 125°C. ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) support broad application compatibility.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	10 V
Tolerance	±20%
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	1 Ohm
Operating Temperature Range	-55°C to 125°C
Package / Case	2312 (6032 Metric)
Mounting Type	Surface Mount
Lifetime @ 125°C	2000 Hours
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the T491C107M010ZTAC00 is determined by strict equivalence across the following critical parameters: capacitance (100 µF), voltage rating (10 V), package dimensions (2312 / 6032 Metric), mounting type (surface mount), operating temperature range (-55°C to 125°C), and lifetime specification (2000 hours at 125°C).

Substitute parts are grouped into two categories:

Direct Manufacturer Substitutes: Parts maintaining identical electrical specifications with variations in packaging format, ESR characteristics, or application-specific ratings. The T491C107M010ATAUTO represents an active alternative with automotive-grade qualification (AEC-Q200) and marginally higher ESR (1.2 Ohm).

Parametric Equivalents: Parts with matching core electrical parameters but differing in tolerance specification or ESR performance. The T489C107M010ATE500 series offers superior ESR performance (500 mOhm @ 100 kHz) while maintaining all other critical specifications. The T491C107K010 variants provide tighter tolerance (±10% versus ±20%) with identical ESR and all other parameters.

All substitute parts maintain the same package footprint, thermal characteristics, and compliance certifications required for direct replacement in circuit designs.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage	ESR	Package	Status	RoHS
T491C107M010ZTAC00	KEMET	T491	100 µF	±20%	10 V	1 Ohm	2312	Obsolete	ROHS3
T491C107M010ATAUTO	KEMET	T491	100 µF	±20%	10 V	1.2 Ohm	2312	Active	ROHS3
T489C107M010ATE500	KEMET	T489	100 µF	±20%	10 V	500 mOhm @ 100 kHz	2312	Active	ROHS3
T491C107K010AG	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AH	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	RoHS Non-Compliant
T491C107K010AT2478	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AT4053	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AT40537280	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AT4280	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AT4380	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3
T491C107K010AT4575	KEMET	T491	100 µF	±10%	10 V	1 Ohm	2312	Active	ROHS3

Engineering Selection Recommendations

Primary Recommendation: T491C107K010AT4053, T491C107K010AT4280, T491C107K010AT4380, or T491C107K010AT4575 are preferred substitutes. These parts maintain identical electrical specifications to the original component while offering active product status, ROHS3 compliance, and ±10% tolerance (tighter than the original ±20%). All variants feature 1 Ohm ESR matching the original specification and are available in Tape & Reel packaging for production environments.

Automotive Applications: T491C107M010ATAUTO is specified for designs requiring AEC-Q200 automotive qualification. This part maintains ±20% tolerance and 10 V rating with marginally elevated ESR (1.2 Ohm versus 1 Ohm). ROHS3 compliance and active status support automotive supply chain requirements.

High-Performance Applications: T489C107M010ATE500 delivers superior ESR performance at 500 mOhm @ 100 kHz, beneficial for applications requiring low impedance characteristics. This part maintains all other electrical and thermal specifications while offering active status and ROHS3 compliance.

Compliance Consideration: T491C107K010AH is electrically equivalent but carries RoHS non-compliant status. Selection of this part requires explicit design justification and regulatory approval for applications subject to RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can T491C107K010 variants (±10% tolerance) directly replace T491C107M010ZTAC00 (±20% tolerance)?

A: Yes. The ±10% tolerance specification is tighter than the original ±20%, providing superior capacitance accuracy. All other electrical parameters—capacitance value, voltage rating, ESR, operating temperature, and package dimensions—are identical. Circuits designed for ±20% tolerance operate within specification with ±10% components.

Q: What is the difference between T491C107M010ATAUTO and other T491C107M010 variants?

A: T491C107M010ATAUTO carries AEC-Q200 automotive qualification and features 1.2 Ohm ESR compared to 1 Ohm in the original part. All other specifications remain identical. This variant is specified for automotive applications requiring formal qualification documentation.

Q: How does T489C107M010ATE500 differ from the original part?

A: The T489C107M010ATE500 belongs to the T489 series and features significantly lower ESR (500 mOhm @ 100 kHz) compared to 1 Ohm in the original. Capacitance, voltage rating, tolerance, package, and thermal characteristics are identical. Lower ESR reduces impedance in high-frequency applications.

Q: Are all substitute parts available in the same package format?

A: The 2312 (6032 Metric) package is consistent across all substitutes. Packaging format (Tape & Reel, Cut Tape, or bulk) varies by part number suffix. Verify packaging requirements for your procurement and assembly process.

Q: Which substitute part offers the best compliance profile?

A: T491C107K010AT4053, T491C107K010AT4280, T491C107K010AT4380, and T491C107K010AT4575 all provide ROHS3 compliance with active product status. These parts are recommended for designs requiring current compliance certifications and long-term supply availability.

Q: Can the original T491C107M010ZTAC00 be used interchangeably with substitute parts in existing designs?

A: Substitute parts are electrically and mechanically compatible with the original design. However, the original part is obsolete. New designs and production runs should specify active substitute parts to ensure supply chain continuity and compliance with current regulatory standards.

Q: What is the significance of the part number suffix (e.g., AT4053, AT4280)?

A: Suffixes identify specific packaging configurations, tape reel specifications, or internal manufacturing codes. All variants with identical core specifications (capacitance, voltage, tolerance, ESR) are functionally equivalent for circuit operation. Suffix selection is driven by procurement and assembly requirements.

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