LMK107BJ684KA-T Equivalent & Substitute Parts

Part Overview

The LMK107BJ684KA-T is a 0.68 µF ±10% 10V ceramic capacitor manufactured by Taiyo Yuden in 0603 (1608 Metric) surface mount package with X5R temperature coefficient. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain flexibility, and support ongoing production of existing applications utilizing this capacitor specification.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	0.68 µF	Must match exactly for direct substitution
Voltage Rating	10V	Minimum requirement; higher ratings acceptable as upgrades
Tolerance	±10%	Must match for circuit performance specifications
Temperature Coefficient	X5R	Defines capacitance stability across operating temperature range
Package / Case	0603 (1608 Metric)	Physical footprint and mounting compatibility
Operating Temperature	-55°C ~ 85°C	Environmental performance range
Mounting Type	Surface Mount, MLCC	Assembly process compatibility
RoHS Status	ROHS3 Compliant	Regulatory compliance requirement
Moisture Sensitivity Level	1 (Unlimited)	Handling and storage requirements

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameters:

Direct Equivalents (Same Voltage Rating - 10V): Parts that match all critical electrical parameters of the LMK107BJ684KA-T, including 0.68 µF capacitance, ±10% tolerance, X5R temperature coefficient, and 10V voltage rating. These parts are pin-compatible and functionally identical for applications designed for 10V operation.

Upgrade Parts (Higher Voltage Ratings - 16V, 25V, 35V, 50V): Parts that maintain the same capacitance, tolerance, temperature coefficient, and package but feature elevated voltage ratings. These parts are suitable for applications where the circuit voltage specification permits higher-rated components, providing enhanced voltage margin and reliability.

Key Parameters Determining Substitution:

Capacitance value (0.68 µF)
Tolerance (±10%)
Temperature coefficient (X5R)
Package size (0603 / 1608 Metric)
Mounting type (Surface Mount, MLCC)
Operating temperature range (-55°C ~ 85°C)
RoHS3 compliance
MSL rating (1 - Unlimited)

Parameter Comparison

Manufacturer	Part Number	Capacitance	Voltage	Tolerance	Temp Coeff	Package	Thickness (Max)	Product Status	Inventory
Taiyo Yuden	LMK107BJ684KA-T	0.68 µF	10V	±10%	X5R	0603	0.90mm	Not For New Designs	40300 Pcs
KEMET	C0603C684K8PAC7867	0.68 µF	10V	±10%	X5R	0603	0.90mm	Active	23628 Pcs
TDK Corporation	C1608X5R1A684K080AC	0.68 µF	10V	±10%	X5R	0603	0.95mm	Not For New Designs	1983 Pcs
Murata Electronics	GRM188R61A684KA61D	0.68 µF	10V	±10%	X5R	0603	0.90mm	Not For New Designs	24767 Pcs
KYOCERA AVX	KGM15BR51A684KM	0.68 µF	10V	±10%	X5R	0603	0.95mm	Active	1004 Pcs
KYOCERA AVX	KGM15BR51A684KT	0.68 µF	10V	±10%	X5R	0603	0.95mm	Active	26815 Pcs
KEMET	C0603C684K4PAC7867	0.68 µF	16V	±10%	X5R	0603	0.87mm	Active	25815 Pcs
TDK Corporation	C1608X5R1C684K080AA	0.68 µF	16V	±10%	X5R	0603	0.90mm	Not For New Designs	4602 Pcs
TDK Corporation	C1608X5R1E684K080AC	0.68 µF	25V	±10%	X5R	0603	0.90mm	Not For New Designs	6029 Pcs
TDK Corporation	C1608X5R1H684K080AB	0.68 µF	50V	±10%	X5R	0603	0.90mm	Not For New Designs	50828 Pcs
TDK Corporation	C1608X5R1V684K080AB	0.68 µF	35V	±10%	X5R	0603	0.90mm	Not For New Designs	4711 Pcs

Engineering Selection Recommendations

For Direct Replacement (10V Applications):

The KEMET C0603C684K8PAC7867 is the preferred direct equivalent. This part maintains Active product status, ensuring long-term availability and supply chain stability. It matches all electrical specifications of the LMK107BJ684KA-T and carries ROHS3 compliance with MSL 1 rating. Inventory availability of 23,628 units supports production requirements.

The KYOCERA AVX KGM15BR51A684KT provides an alternative direct equivalent with Active status and 26,815 units in stock. Both KYOCERA AVX options (KGM15BR51A684KM and KGM15BR51A684KT) are functionally equivalent, with the KGM15BR51A684KT offering higher inventory levels.

For Voltage-Upgraded Applications:

When circuit design permits higher voltage ratings, the KEMET C0603C684K4PAC7867 (16V) offers Active status with 25,815 units available. The TDK C1608X5R1H684K080AB (50V) provides maximum voltage margin with 50,828 units in stock, though classified as Not For New Designs.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory profile. Selection should prioritize parts with Active product status for new production commitments.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a direct substitute?

A: Yes. A capacitor with a higher voltage rating (16V, 25V, 35V, or 50V) is electrically compatible with a 10V application. The higher voltage rating provides additional safety margin and does not degrade circuit performance. The capacitance value, tolerance, and temperature coefficient remain identical.

Q: What is the difference between Direct Equivalents and Upgrade Parts?

A: Direct Equivalents (10V rated) are functionally identical to the LMK107BJ684KA-T and require no circuit modifications. Upgrade Parts feature higher voltage ratings and are suitable only when the application circuit voltage specification permits their use. Both categories maintain the same 0.68 µF capacitance and X5R temperature coefficient.

Q: Are there physical size differences between substitute parts?

A: All parts use the 0603 (1608 Metric) package with identical length (0.063" / 1.60mm) and width (0.031" / 0.80mm). Thickness varies slightly between 0.87mm and 0.95mm maximum. These minor thickness variations are within standard PCB assembly tolerances and do not affect mounting compatibility.

Q: Which substitute part has the best long-term availability?

A: KEMET C0603C684K8PAC7867 and KYOCERA AVX KGM15BR51A684KT both carry Active product status, indicating ongoing manufacturer support. The KYOCERA AVX KGM15BR51A684KT offers the highest inventory level at 26,815 units.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original LMK107BJ684KA-T specifications. REACH status is either Unaffected or not specified, consistent with ceramic capacitor regulatory profiles.

Q: Can I substitute parts between different manufacturers?

A: Yes. All substitute parts maintain identical electrical specifications (0.68 µF, ±10%, X5R, 10V or higher) and package dimensions (0603). Cross-manufacturer substitution is standard practice when electrical and mechanical parameters match.

Q: What should I verify before implementing a substitute part?

A: Confirm that the substitute part's voltage rating meets or exceeds your circuit requirement, verify package dimensions fit your PCB layout, and confirm ROHS3 and MSL compliance status. All listed parts satisfy these criteria for the LMK107BJ684KA-T application.

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