Equivalent & Substitute Parts for CL21B684KBFVPNE

Part Overview

The CL21B684KBFVPNE is a 0.68 µF ±10% 50V ceramic capacitor manufactured by Samsung Electro-Mechanics in 0805 (2012 Metric) package format. This multilayer ceramic capacitor (MLCC) features X7R temperature coefficient and is rated for automotive applications with AEC-Q200 compliance. The part is currently in active production status with 1172 pieces available in inventory.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain constraints require alternative sourcing, or when design flexibility permits equivalent electrical and mechanical specifications from alternative manufacturers.

Substiute Parts

CL21B684KBFVPNE

Samsung Electro-MechanicsIn Stock: 1209CL21B684KBFVPNE Datasheet

Current PartRFQ

AC0805KKX7R9BB684

YAGEOIn Stock: 20110AC0805KKX7R9BB684 Datasheet

DirectRFQ

C0805C684K5RACAUTO

KEMETIn Stock: 22071C0805C684K5RACAUTO Datasheet

DirectRFQ

CGJ4J3X7R1H684K125AB

TDK CorporationIn Stock: 3045CGJ4J3X7R1H684K125AB Datasheet

DirectRFQ

CGA4J3X7S2A684K125AB

TDK CorporationIn Stock: 6309CGA4J3X7S2A684K125AB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter alignment:

Direct Substitutes (Electrical and Mechanical Equivalence): Parts that match all critical electrical parameters (capacitance, voltage rating, temperature coefficient, tolerance) and mechanical specifications (package, dimensions, mounting type). These parts are interchangeable without circuit redesign.

Similar Parts (Partial Parameter Deviation): Parts that share the same capacitance, package, and mounting type but differ in voltage rating or temperature coefficient. These require circuit-level evaluation before substitution.

The following parameters determine direct substitution eligibility:

• Capacitance: 0.68 µF (exact match required)
• Voltage Rating: 50V minimum (equal or higher acceptable)
• Temperature Coefficient: X7R (exact match required for thermal performance)
• Tolerance: ±10% (exact match or tighter acceptable)
• Package: 0805 (2012 Metric) (exact match required)
• Operating Temperature: -55°C ~ 125°C (exact match or wider range acceptable)
• AEC-Q200 Compliance: Required for automotive applications
• RoHS3 Compliance: Required for regulatory adherence

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Fully Equivalent):

AC0805KKX7R9BB684 (YAGEO), C0805C684K5RACAUTO (KEMET), and CGJ4J3X7R1H684K125AB (TDK) are direct electrical and mechanical equivalents to CL21B684KBFVPNE. All three parts match the required capacitance (0.68 µF), voltage rating (50V), temperature coefficient (X7R), tolerance (±10%), package format (0805), and operating temperature range (-55°C ~ 125°C). All three carry AEC-Q200 automotive qualification and ROHS3 compliance.

AC0805KKX7R9BB684 and C0805C684K5RACAUTO are recommended for new designs due to active product status and superior inventory availability (20073 and 21989 pieces respectively). CGJ4J3X7R1H684K125AB carries obsolete product status and should be avoided for new applications despite adequate current inventory.

Physical thickness variations exist among direct substitutes (0.037" to 0.057"), which may affect PCB layout in space-constrained applications. AC0805KKX7R9BB684 offers the thinnest profile at 0.037" (0.95mm).

Similar Part (Conditional Substitution):

CGA4J3X7S2A684K125AB (TDK) differs in two parameters: voltage rating (100V versus 50V) and temperature coefficient (X7S versus X7R). The higher voltage rating provides additional design margin but increases component cost and footprint. The X7S temperature coefficient exhibits greater capacitance variation across temperature compared to X7R. This part is suitable only when circuit design specifically requires 100V rating or when X7S thermal characteristics are acceptable.

Frequently Asked Questions (FAQ)

Q: Can AC0805KKX7R9BB684 replace CL21B684KBFVPNE directly on the PCB?

A: Yes. AC0805KKX7R9BB684 is a direct electrical and mechanical equivalent. Both parts share identical capacitance (0.68 µF), voltage rating (50V), temperature coefficient (X7R), tolerance (±10%), package format (0805), and operating temperature range (-55°C ~ 125°C). Both carry AEC-Q200 automotive qualification and ROHS3 compliance. No circuit redesign is required.

Q: What is the difference between X7R and X7S temperature coefficients?

A: X7R temperature coefficient specifies capacitance variation of ±15% across the operating temperature range (-55°C ~ 125°C). X7S temperature coefficient specifies capacitance variation of ±22% across the same range. X7R provides superior temperature stability and is preferred for precision applications. CGA4J3X7S2A684K125AB uses X7S and is not a direct substitute for X7R applications.

Q: Why does CGA4J3X7S2A684K125AB have a 100V rating instead of 50V?

A: CGA4J3X7S2A684K125AB is classified as a similar part rather than a direct substitute. The 100V rating provides additional voltage margin but is not required for circuits designed for 50V operation. Using a 100V-rated capacitor in a 50V circuit is electrically acceptable but increases cost and component size unnecessarily.

Q: Is CGJ4J3X7R1H684K125AB suitable for new designs?

A: No. CGJ4J3X7R1H684K125AB carries obsolete product status, indicating the manufacturer has discontinued active production. Although 2954 pieces remain in current inventory, this part should not be selected for new designs. AC0805KKX7R9BB684 or C0805C684K5RACAUTO are recommended alternatives with active product status.

Q: How do thickness variations affect PCB assembly?

A: Thickness variations among 0805 package parts (0.037" to 0.057") may impact PCB layout in space-constrained applications, particularly when components are mounted on both sides of the board or when clearance to adjacent components is minimal. AC0805KKX7R9BB684 at 0.037" (0.95mm) offers the thinnest profile. Verify PCB design clearances before selecting parts with maximum thickness specifications.

Q: Are all substitute parts automotive-qualified?

A: Yes. All listed substitute parts carry AEC-Q200 automotive qualification, matching the primary part CL21B684KBFVPNE. AEC-Q200 certification confirms compliance with automotive reliability and quality standards. All parts are ROHS3 compliant for regulatory adherence.

Q: What packaging formats are available for these substitutes?

A: AC0805KKX7R9BB684 and C0805C684K5RACAUTO are supplied in Tape & Reel (TR) format. CGJ4J3X7R1H684K125AB is supplied in Cut Tape (CT) & Digi-Reel® format. CGA4J3X7S2A684K125AB is supplied in Tape & Reel (TR) format. Packaging format affects handling and assembly processes but does not impact electrical performance.