CL31B334KBFNNNF Equivalent & Substitute Parts

Part Overview

The CL31B334KBFNNNF is a 0.33 µF ±10% 50V ceramic capacitor manufactured by Samsung Electro-Mechanics in the 1206 (3216 Metric) package with X7R temperature coefficient. This surface mount multilayer ceramic capacitor (MLCC) is classified as Active product status with unlimited moisture sensitivity (MSL 1). The part is ROHS3 compliant and REACH unaffected, suitable for general purpose applications including bypass and decoupling circuits.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design requirements necessitate alternative electrical specifications such as improved tolerance or higher voltage ratings.

Key Parameters

Parameter	Value	Specification Range
Capacitance	0.33 µF	Fixed
Tolerance	±10%	Acceptable Range
Voltage Rating	50V	Minimum Required
Temperature Coefficient	X7R	Fixed
Operating Temperature	-55°C to 125°C	Fixed
Package / Case	1206 (3216 Metric)	Fixed
Mounting Type	Surface Mount, MLCC	Fixed
RoHS Status	ROHS3 Compliant	Required
Moisture Sensitivity Level	1 (Unlimited)	Acceptable

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on electrical and mechanical compatibility with the CL31B334KBFNNNF:

Parametric Equivalents maintain identical electrical specifications: 0.33 µF capacitance, ±10% tolerance, 50V voltage rating, X7R temperature coefficient, and 1206 package. These parts are direct functional replacements with no circuit redesign required.

Direct Manufacturer Equivalents meet all parametric requirements but originate from different manufacturers (KEMET, TDK Corporation, Murata Electronics, KYOCERA AVX, Cal-Chip Electronics). Electrical performance is equivalent; physical dimensions may vary within acceptable tolerances for the 1206 package footprint.

Upgrade Parts provide enhanced specifications including improved tolerance (±5% versus ±10%) or higher voltage ratings (100V versus 50V). These parts are backward compatible and suitable for applications requiring tighter tolerance or higher voltage margin.

Substitution is valid when the following criteria are met:

Capacitance value: 0.33 µF (fixed)
Temperature coefficient: X7R (fixed)
Package: 1206 (3216 Metric) (fixed)
Voltage rating: minimum 50V
Tolerance: ±10% or better
Mounting type: Surface Mount, MLCC (fixed)
Compliance: ROHS3 compliant, MSL 1 or MSL 2

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness (Max)	Product Status	MSL
CL31B334KBFNNNF	Samsung Electro-Mechanics	0.33 µF	±10%	50V	X7R	1206	0.055" (1.40mm)	Active	1
CL31B334KBFNNNE	Samsung Electro-Mechanics	0.33 µF	±10%	50V	X7R	1206	0.055" (1.40mm)	Active	1
C1206C334K5RAC7800	KEMET	0.33 µF	±10%	50V	X7R	1206	0.039" (1.00mm)	Active	1
C3216X7R1H334K160AA	TDK Corporation	0.33 µF	±10%	50V	X7R	1206	0.071" (1.80mm)	Not For New Designs	1
GRM319R71H334KA01D	Murata Electronics	0.33 µF	±10%	50V	X7R	1206	0.037" (0.95mm)	Not For New Designs	1
C1206C334J5RAC7800	KEMET	0.33 µF	±5%	50V	X7R	1206	0.039" (1.00mm)	Active	1
C3216X7R2A334K130AA	TDK Corporation	0.33 µF	±10%	100V	X7R	1206	0.057" (1.45mm)	Active	1
KGM31AR72A334KU	KYOCERA AVX	0.33 µF	±10%	100V	X7R	1206	0.071" (1.80mm)	Active	1
KGM31PR71H334JU	KYOCERA AVX	0.33 µF	±5%	50V	X7R	1206	0.055" (1.40mm)	Active	1
C1206C334K5REC7800	KEMET	0.33 µF	±10%	50V	X7R	1206	0.055" (1.40mm)	Active	1
GMC31X7R334K50NT	Cal-Chip Electronics	0.33 µF	±10%	50V	X7R	1206	0.071" (1.80mm)	Active	2

Engineering Selection Recommendations

For Direct Replacement (Active Product Status):

CL31B334KBFNNNE (Samsung Electro-Mechanics) is the primary parametric equivalent with identical specifications and Active product status. This part is suitable for new designs and provides the most direct substitution path.

C1206C334K5RAC7800 (KEMET) and C1206C334K5REC7800 (KEMET) are Active status alternatives with equivalent electrical specifications. The KEMET parts feature reduced thickness (0.039" to 0.055" maximum), which may provide PCB layout advantages in space-constrained applications.

KGM31PR71H334JU (KYOCERA AVX) and C1206C334J5RAC7800 (KEMET) offer improved ±5% tolerance while maintaining 50V rating and Active product status. These are suitable when tighter capacitance tolerance is required.

For Enhanced Specifications (Active Product Status):

C3216X7R2A334K130AA (TDK Corporation) and KGM31AR72A334KU (KYOCERA AVX) provide 100V voltage rating with Active product status. These parts are backward compatible and suitable for applications requiring higher voltage margin or future design flexibility.

For Legacy Applications Only:

C3216X7R1H334K160AA (TDK Corporation) and GRM319R71H334KA01D (Murata Electronics) carry "Not For New Designs" status. These parts are suitable only for sustaining production of existing products or replacement in fielded equipment.

Moisture Sensitivity Consideration:

GMC31X7R334K50NT (Cal-Chip Electronics) has MSL 2 (1 Year) rating versus MSL 1 (Unlimited) for all other parts. This part requires controlled storage and handling procedures and is suitable only when MSL 2 compliance is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can CL31B334KBFNNNE be used as a direct replacement for CL31B334KBFNNNF?

A: Yes. CL31B334KBFNNNE is a parametric equivalent from the same manufacturer (Samsung Electro-Mechanics) with identical electrical specifications: 0.33 µF ±10% 50V X7R 1206 package. The only difference is packaging format (Cut Tape & Digi-Reel versus standard packaging). Both parts are Active product status and ROHS3 compliant.

Q: What is the difference between ±10% and ±5% tolerance parts?

A: Tolerance defines the acceptable capacitance variation from the nominal 0.33 µF value. ±10% tolerance allows variation from 0.297 µF to 0.363 µF. ±5% tolerance allows variation from 0.3135 µF to 0.3465 µF. Applications requiring tighter capacitance control should specify ±5% parts such as C1206C334J5RAC7800 or KGM31PR71H334JU.

Q: Can I use a 100V rated capacitor in place of a 50V rated capacitor?

A: Yes. Higher voltage rating provides additional safety margin and is backward compatible. Parts C3216X7R2A334K130AA (TDK) and KGM31AR72A334KU (KYOCERA AVX) rated at 100V can substitute for the 50V CL31B334KBFNNNF. Physical dimensions may vary; verify PCB footprint compatibility before assembly.

Q: Why are some parts marked "Not For New Designs"?

A: Parts with "Not For New Designs" status (C3216X7R1H334K160AA and GRM319R71H334KA01D) are mature products approaching end-of-life. These parts are suitable only for sustaining production of existing products or field replacement. New designs should use Active status parts such as CL31B334KBFNNNE, C1206C334K5RAC7800, or KYOCERA AVX alternatives.

Q: What does MSL 1 versus MSL 2 mean?

A: Moisture Sensitivity Level (MSL) defines storage and handling requirements. MSL 1 (Unlimited) requires no special moisture control and has unlimited shelf life. MSL 2 (1 Year) requires controlled storage below 30°C and 85% relative humidity with a 1-year shelf life limit. GMC31X7R334K50NT carries MSL 2 rating and requires controlled storage procedures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the significance of package thickness variation?

A: Thickness varies from 0.037" (0.95mm) minimum to 0.071" (1.80mm) maximum across substitute parts. Verify PCB design clearance and component stacking requirements. Thinner parts (KEMET at 0.039" to 0.055") may provide advantages in high-density layouts. Thicker parts (TDK and KYOCERA AVX at 0.071" to 0.080") may require additional PCB clearance.

Q: Can I mix different manufacturers' parts in the same circuit board?

A: Yes. All listed substitute parts meet identical electrical specifications (0.33 µF ±10% 50V X7R 1206) and are functionally interchangeable. Mixing manufacturers is acceptable from an electrical standpoint; however, verify component sourcing and supply chain consistency for production consistency.

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