CL21B124KBFNNNE Equivalent & Substitute Parts

Part Overview

The CL21B124KBFNNNE is a 0.12 µF ceramic capacitor manufactured by Samsung Electro-Mechanics, rated for 50V with X7R temperature coefficient in 0805 (2012 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design optimization needs.

Substiute Parts

CL21B124KBFNNNE

Samsung Electro-MechanicsIn Stock: 1145CL21B124KBFNNNE Datasheet

Current PartRFQ

C0805C124K5RAC7800

KEMETIn Stock: 15555C0805C124K5RAC7800 Datasheet

DirectRFQ

KGM21ER71H124KU

KYOCERA AVXIn Stock: 15959KGM21ER71H124KU Datasheet

DirectRFQ

C0805C124K1RAC7800

KEMETIn Stock: 13284C0805C124K1RAC7800 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CL21B124KBFNNNE are categorized into two groups based on electrical parameter alignment:

Direct Equivalents (Same Electrical Specifications): Parts that maintain identical capacitance (0.12 µF), voltage rating (50V), temperature coefficient (X7R), tolerance (±10%), and operating temperature range (-55°C ~ 125°C). These parts are interchangeable at the circuit level with no design modifications required. Mechanical dimensions remain within acceptable tolerances for 0805 package footprint.

Upgrade Substitutes (Enhanced Voltage Rating): Parts that maintain identical capacitance, temperature coefficient, tolerance, and operating temperature, but feature increased voltage rating (100V instead of 50V). These parts provide additional design margin and are electrically compatible with circuits designed for 50V operation. Voltage derating does not affect capacitance value or thermal characteristics.

Key Parameters Determining Substitution:

• Capacitance value: 0.12 µF (non-negotiable)
• Temperature coefficient: X7R (non-negotiable)
• Tolerance: ±10% (non-negotiable)
• Package: 0805 (2012 Metric) (non-negotiable)
• Voltage rating: 50V minimum (100V acceptable as upgrade)
• Operating temperature: -55°C ~ 125°C (non-negotiable)
• RoHS3 compliance (non-negotiable)
• MSL 1 rating (non-negotiable)

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Equivalent Voltage Rating):

C0805C124K5RAC7800 (KEMET) and KGM21ER71H124KU (KYOCERA AVX) are direct electrical equivalents to the CL21B124KBFNNNE. Both maintain 50V voltage rating, 0.12 µF capacitance, X7R temperature coefficient, and ±10% tolerance. All three parts are Active status with ROHS3 compliance and MSL 1 rating. Selection between these direct equivalents is based on availability, packaging format (Tape & Reel), and inventory levels. Mechanical dimensions are within acceptable tolerances for 0805 footprint compatibility.

For Voltage Upgrade Application:

C0805C124K1RAC7800 (KEMET) provides 100V rating while maintaining all other electrical specifications identical to the original part. This upgrade substitute is suitable when circuit design permits higher voltage rating or when additional design margin is required. The increased thickness (0.055" vs. 0.053" maximum) remains within typical PCB assembly tolerances for 0805 components. Active product status and full compliance certifications are maintained.

Selection Criteria:

All substitute parts maintain Active product status, ROHS3 compliance, REACH unaffected status, and MSL 1 unlimited moisture sensitivity rating. Substitution decisions should be based on supply availability, packaging requirements (Tape & Reel format), and inventory levels. No design modifications are required for direct equivalent substitutes. Voltage upgrade substitute requires only verification that circuit design permits 100V operation.

Frequently Asked Questions (FAQ)

Q: Can C0805C124K5RAC7800 replace CL21B124KBFNNNE directly in production?

A: Yes. C0805C124K5RAC7800 maintains identical electrical specifications (0.12 µF, 50V, X7R, ±10%) and mechanical compatibility (0805 package). No circuit modifications are required. Both parts are Active status with ROHS3 compliance and MSL 1 rating.

Q: What is the difference between the two direct equivalent substitutes?

A: C0805C124K5RAC7800 (KEMET) and KGM21ER71H124KU (KYOCERA AVX) are electrically identical. The primary difference is manufacturer and maximum thickness specification (1.00mm vs. 1.35mm). Both are compatible with 0805 footprint assembly. Selection is based on availability and packaging format.

Q: Can C0805C124K1RAC7800 be used as a drop-in replacement?

A: C0805C124K1RAC7800 is electrically compatible as a drop-in replacement from a circuit perspective. It maintains 0.12 µF capacitance, X7R temperature coefficient, and ±10% tolerance. The 100V rating provides additional design margin for 50V circuits. Maximum thickness increases to 0.055" (1.40mm), which remains within standard 0805 assembly tolerances.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (C0805C124K5RAC7800, KGM21ER71H124KU, C0805C124K1RAC7800) maintain ROHS3 compliance identical to the original CL21B124KBFNNNE.

Q: What does MSL 1 (Unlimited) mean for these capacitors?

A: MSL 1 rating indicates unlimited shelf life without moisture baking requirements. All listed parts, including the original and substitutes, have MSL 1 rating and do not require special moisture control during storage or handling.

Q: Can these parts be used interchangeably in the same PCB assembly?

A: Yes, for direct equivalent substitutes (C0805C124K5RAC7800 and KGM21ER71H124KU). Both maintain identical electrical and mechanical specifications. The voltage upgrade substitute (C0805C124K1RAC7800) is also compatible provided circuit design permits 100V operation.

Q: What is the significance of the 0805 (2012 Metric) package designation?

A: 0805 is the imperial designation; 2012 Metric is the metric equivalent. Both refer to the same physical package size (2.00mm x 1.25mm length x width). All listed parts use this identical package, ensuring PCB footprint compatibility.

Q: Are there any thermal performance differences between these substitutes?

A: All parts maintain identical operating temperature range (-55°C ~ 125°C) and X7R temperature coefficient. Thermal performance characteristics are equivalent across all listed parts.