CL21B684KOFNNNF Equivalent & Substitute Parts

Part Overview

The CL21B684KOFNNNF is a 0.68 µF ±10% 16V ceramic capacitor manufactured by Samsung Electro-Mechanics in the 0805 (2012 Metric) surface mount package. This component features an X7R temperature coefficient and operates across the -55°C to 125°C temperature range, making it suitable for general-purpose applications requiring stable capacitance across temperature variations.

The CL21B684KOFNNNF is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this capacitor specification.

Key Parameters

Parameter	Value
Capacitance	0.68 µF
Tolerance	±10%
Voltage Rating	16V
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CL21B684KOFNNNF are classified into three categories based on their relationship to the original specification:

Upgrade Substitutes maintain identical electrical parameters (0.68 µF, ±10% tolerance, 16V rating, X7R temperature coefficient) while offering improved product status or enhanced certifications. These parts are direct functional replacements with active manufacturing status or automotive-grade qualifications.

Parametric Equivalents match all critical electrical specifications and package dimensions but differ in packaging format or product status. These parts satisfy the same circuit requirements and are interchangeable from an electrical standpoint.

Direct Equivalents from alternative manufacturers (KEMET, TDK, Murata, KYOCERA AVX) provide identical electrical and mechanical specifications within the same 0805 package footprint. These parts meet the same performance criteria and are sourced from established component suppliers.

Substitution eligibility is determined by the following parameters:

Capacitance value: 0.68 µF (exact match required)
Voltage rating: 16V (minimum requirement)
Temperature coefficient: X7R (required for temperature stability)
Package: 0805 (2012 Metric) (physical compatibility requirement)
Tolerance: ±10% or tighter (functional compatibility)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Product Status	Packaging Type
CL21B684KOFNNNF	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Obsolete	Standard
CL21B684JOFNNNE	Samsung Electro-Mechanics	0.68 µF	±5%	16V	X7R	0805	Active	Tape & Reel
CL21B684KOFVPNC	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Active	Standard
CL21B684KOFVPNE	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Active	Tape & Reel
CL21B684KOFNFNE	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Active	Standard
CL21B684KOFNNNE	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Obsolete	Cut Tape & Digi-Reel
CL21B684KOFNNNG	Samsung Electro-Mechanics	0.68 µF	±10%	16V	X7R	0805	Obsolete	Cut Tape
C0805C684K4RAC7800	KEMET	0.68 µF	±10%	16V	X7R	0805	Active	Tape & Reel
C2012X7R1C684K125AA	TDK Corporation	0.68 µF	±10%	16V	X7R	0805	Not For New Designs	Tape & Reel
GRM219R71C684KA01D	Murata Electronics	0.68 µF	±10%	16V	X7R	0805	Not For New Designs	Tape & Reel
KGM21AR71C684KU	KYOCERA AVX	0.68 µF	±10%	16V	X7R	0805	Active	Tape & Reel

Engineering Selection Recommendations

For Active Production Applications:

CL21B684JOFNNNE (Samsung Electro-Mechanics) is the primary upgrade substitute. This part maintains identical electrical specifications while offering active product status and improved tolerance (±5% versus ±10%), providing enhanced capacitance stability. It is available in Tape & Reel packaging suitable for automated assembly.

CL21B684KOFVPNE (Samsung Electro-Mechanics) provides an alternative active substitute with AEC-Q200 automotive qualification. This part is appropriate for applications requiring automotive-grade reliability and is available in Tape & Reel format.

For Cross-Manufacturer Sourcing:

C0805C684K4RAC7800 (KEMET) is an active direct equivalent with identical electrical and mechanical specifications. This part is suitable for bypass and decoupling applications and offers high inventory availability.

KGM21AR71C684KU (KYOCERA AVX) is an active direct equivalent with confirmed compatibility across all critical parameters. This part supports general-purpose applications and maintains active manufacturing status.

For Legacy System Support:

CL21B684KOFNFNE (Samsung Electro-Mechanics) is a parametric equivalent with active status, suitable for applications where the original obsolete part must be replaced while maintaining identical electrical performance.

Parts Not Recommended for New Designs:

C2012X7R1C684K125AA (TDK Corporation) and GRM219R71C684KA01D (Murata Electronics) carry "Not For New Designs" status and should be used only for legacy system maintenance or repair applications.

Frequently Asked Questions (FAQ)

Q: Can CL21B684JOFNNNE be used as a direct replacement for CL21B684KOFNNNF?

A: Yes. CL21B684JOFNNNE is electrically and mechanically compatible. Both parts share identical capacitance (0.68 µF), voltage rating (16V), temperature coefficient (X7R), and package (0805). The primary difference is improved tolerance (±5% versus ±10%) and active product status, making it a superior substitute.

Q: What is the difference between CL21B684KOFVPNC and CL21B684KOFVPNE?

A: Both parts are electrically identical with 0.68 µF capacitance, ±10% tolerance, and 16V rating. The difference is packaging format: CL21B684KOFVPNC is standard packaging, while CL21B684KOFVPNE is Tape & Reel format. Both include AEC-Q200 automotive qualification. Selection depends on assembly process requirements.

Q: Are KEMET and KYOCERA AVX parts fully compatible with Samsung parts?

A: Yes. C0805C684K4RAC7800 (KEMET) and KGM21AR71C684KU (KYOCERA AVX) meet identical electrical specifications (0.68 µF, ±10%, 16V, X7R) and share the same 0805 package footprint. All three manufacturers' parts are ROHS3 compliant with MSL 1 rating. Cross-manufacturer substitution is electrically and mechanically valid.

Q: Why is CL21B684KOFNNNF marked as obsolete?

A: Product obsolescence reflects Samsung Electro-Mechanics' manufacturing discontinuation. Active alternatives with identical or superior specifications are available from Samsung (CL21B684JOFNNNE, CL21B684KOFVPNE) and other manufacturers (KEMET, KYOCERA AVX, Murata, TDK), ensuring continued design support.

Q: Can I use parts marked "Not For New Designs" in production?

A: Parts with "Not For New Designs" status (C2012X7R1C684K125AA, GRM219R71C684KA01D) are restricted to legacy system maintenance and repair only. For new production, use active-status alternatives: CL21B684JOFNNNE, CL21B684KOFVPNE, C0805C684K4RAC7800, or KGM21AR71C684KU.

Q: Does tolerance affect substitution eligibility?

A: Tolerance affects circuit performance precision but does not prevent substitution. CL21B684JOFNNNE offers tighter tolerance (±5%) than the original (±10%), providing improved capacitance stability. Parts with ±10% tolerance are directly interchangeable with the original specification.

Q: What packaging formats are available?

A: Available formats include standard packaging, Tape & Reel (TR), Cut Tape (CT), and Cut Tape with Digi-Reel. Selection depends on assembly equipment compatibility. Tape & Reel format is standard for automated pick-and-place assembly.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original CL21B684KOFNNNF specification. All parts also maintain MSL 1 (Unlimited) moisture sensitivity rating.

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