TE Connectivity 2-1676904-9 Equivalent & Substitute Parts

Part Overview

The TE Connectivity 2-1676904-9 is a 10 µF molded tantalum capacitor rated for 20 V operation in a 2312 (6032 Metric) surface mount package. This component is classified as obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts maintain the core electrical specifications while offering active product status and enhanced availability from alternative manufacturers.

Key Parameters

Parameter	Value
Capacitance	10 µF
Voltage Rating	20 V
Tolerance	±20%
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	1.8 Ohm
Operating Temperature Range	-55°C to 125°C
Package / Case	2312 (6032 Metric)
Mounting Type	Surface Mount
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are grouped into three categories based on electrical and mechanical compatibility with the main part 2-1676904-9:

Direct Equivalents (Same Electrical Specifications) Direct substitutes maintain identical capacitance (10 µF), voltage rating (20 V), tolerance (±20%), ESR (1.8 Ohm), and operating temperature range (-55°C to 125°C). These parts are interchangeable at the circuit level with no design modifications required.

Tolerance Upgrades (Tighter Tolerance) Upgrade substitutes provide ±10% tolerance instead of ±20%, offering improved capacitance accuracy while maintaining all other electrical parameters. These parts are electrically compatible and provide enhanced performance margins.

Voltage Upgrades (Higher Voltage Rating) Upgrade substitutes rated for 25 V instead of 20 V provide additional voltage margin while maintaining 10 µF capacitance and 1.8 Ohm ESR. These parts are backward compatible with 20 V circuit requirements.

Temperature Upgrades (Extended Operating Range) Upgrade substitutes rated for -55°C to 175°C operation extend the upper temperature limit from 125°C, suitable for automotive and high-temperature applications while maintaining core electrical specifications.

Package Variants (Different Height) Substitute parts with different manufacturer size codes (C, U, W) provide alternative physical heights while maintaining the 2312 (6032 Metric) footprint and electrical performance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR	Temp Range	Package	Height (Max)	Product Status	Packaging Type
2-1676904-9	TE Connectivity	10 µF	20 V	±20%	1.8 Ohm	-55°C to 125°C	2312	0.106" (2.70mm)	Obsolete	-
T491C106M020AT	KEMET	10 µF	20 V	±20%	1.8 Ohm	-55°C to 125°C	2312	0.110" (2.80mm)	Active	Cut Tape (CT) & Digi-Reel®
T491C106K020AT	KEMET	10 µF	20 V	±10%	1.8 Ohm	-55°C to 125°C	2312	0.110" (2.80mm)	Active	Cut Tape (CT) & Digi-Reel®
T491U106K020AT	KEMET	10 µF	20 V	±10%	1.8 Ohm	-55°C to 125°C	2312	0.059" (1.50mm)	Active	Tape & Reel (TR)
T499C106K020ATE1K8	KEMET	10 µF	20 V	±10%	1.8 Ohm	-55°C to 175°C	2312	0.110" (2.80mm)	Active	Tape & Reel (TR)
TAJC106K025RNJ	KYOCERA AVX	10 µF	25 V	±10%	1.8 Ohm	-55°C to 125°C	2312	0.110" (2.80mm)	Active	Cut Tape (CT) & Digi-Reel®
TAJC106M025RNJ	KYOCERA AVX	10 µF	25 V	±20%	1.8 Ohm	-55°C to 125°C	2312	0.110" (2.80mm)	Active	Cut Tape (CT) & Digi-Reel®
TAJW106K025RNJ	KYOCERA AVX	10 µF	25 V	±10%	1.8 Ohm	-55°C to 125°C	2312	0.059" (1.50mm)	Active	Tape & Reel (TR)
TAJW106M025RNJ	KYOCERA AVX	10 µF	25 V	±20%	1.8 Ohm	-55°C to 125°C	2312	0.059" (1.50mm)	Active	Tape & Reel (TR)
THJC106K025RJN	KYOCERA AVX	10 µF	25 V	±10%	1.8 Ohm @ 100kHz	-55°C to 175°C	2312	0.110" (2.80mm)	Active	Tape & Reel (TR)
THJC106M025RJN	KYOCERA AVX	10 µF	25 V	±20%	1.8 Ohm @ 100kHz	-55°C to 175°C	2312	0.110" (2.80mm)	Active	Tape & Reel (TR)

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications) T491C106M020AT is the primary direct equivalent, offering identical electrical specifications to the obsolete 2-1676904-9. This KEMET part maintains 10 µF capacitance, 20 V rating, ±20% tolerance, and 1.8 Ohm ESR. Active product status ensures long-term availability. The 0.110" maximum seated height is within acceptable PCB assembly tolerances for most applications.

For Improved Tolerance Performance T491C106K020AT and T491U106K020AT provide ±10% tolerance upgrades while maintaining 20 V rating and 1.8 Ohm ESR. These KEMET parts are suitable for applications requiring tighter capacitance accuracy. T491U106K020AT offers a reduced height profile (0.059") for space-constrained designs.

For Extended Temperature Operation T499C106K020ATE1K8 extends the operating range to -55°C to 175°C while maintaining 20 V rating and ±10% tolerance. This KEMET part includes AEC-Q200 automotive qualification and is suitable for high-temperature environments.

For Voltage Margin Enhancement TAJC106K025RNJ, TAJW106K025RNJ, THJC106K025RJN provide 25 V rating upgrades with ±10% tolerance. These KYOCERA AVX parts maintain backward compatibility with 20 V circuit requirements while providing additional voltage headroom. THJC106K025RJN includes AEC-Q200 automotive qualification and extended temperature range (-55°C to 175°C).

For Tolerance and Voltage Combination TAJC106M025RNJ and TAJW106M025RNJ combine 25 V rating with ±20% tolerance matching the original specification. TAJW106M025RNJ offers reduced height (0.059") for compact designs.

For Automotive Applications T499C106K020ATE1K8, THJC106K025RJN, and THJC106M025RJN carry AEC-Q200 automotive qualification and extended temperature ratings suitable for automotive electronics.

Frequently Asked Questions (FAQ)

Q: Can T491C106M020AT be used as a direct replacement for 2-1676904-9? A: Yes. T491C106M020AT maintains identical electrical specifications: 10 µF capacitance, 20 V rating, ±20% tolerance, 1.8 Ohm ESR, and -55°C to 125°C operating range. The 0.110" maximum height is compatible with standard PCB assembly processes.

Q: What is the difference between tolerance grades ±20% and ±10%? A: Tolerance specifies the allowable deviation from the nominal capacitance value. ±20% permits capacitance between 8 µF and 12 µF; ±10% permits 9 µF to 11 µF. Tighter tolerance provides improved circuit performance in applications sensitive to capacitance variation.

Q: Are 25 V rated parts compatible with 20 V circuit requirements? A: Yes. Parts rated for 25 V operate safely at 20 V and lower. The higher voltage rating provides additional safety margin and stress reduction on the component, potentially extending operational life.

Q: What is the significance of the height difference between 0.059" and 0.110"? A: Height variation affects PCB assembly clearance and component placement. Reduced height (0.059") accommodates space-constrained designs and lower-profile assemblies. Standard height (0.110") is suitable for conventional PCB layouts.

Q: Which substitute parts are suitable for automotive applications? A: T499C106K020ATE1K8, THJC106K025RJN, and THJC106M025RJN carry AEC-Q200 automotive qualification. These parts are tested and approved for automotive electronics operating in extended temperature ranges.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean? A: MSL 1 indicates the component requires no special moisture protection during storage and handling. The component can be stored indefinitely without desiccant packaging or baking procedures prior to assembly.

Q: Are KEMET and KYOCERA AVX parts electrically interchangeable? A: Yes, within the specified electrical parameters. Both manufacturers produce molded tantalum capacitors meeting the same industry standards. Electrical interchangeability is determined by matching capacitance, voltage, tolerance, ESR, and temperature specifications.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Cut Tape (CT) & Digi-Reel® packaging provides components in smaller quantities suitable for manual assembly or small production runs. Tape & Reel (TR) packaging provides components on continuous tape for automated pick-and-place assembly equipment, typical for high-volume production.

Q: Can parts with different ESR specifications be substituted? A: ESR affects circuit performance in high-frequency applications and power supply filtering. All listed substitutes maintain 1.8 Ohm ESR (or 1.8 Ohm @ 100kHz for KYOCERA AVX THJ series), ensuring equivalent electrical performance.

Q: What is RoHS3 compliance? A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European environmental regulations restricting lead, cadmium, mercury, and other hazardous substances. All active substitute parts listed are RoHS3 compliant.

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