CL43B334KBFNNNF Equivalent & Substitute Parts Reference

Part Overview

The CL43B334KBFNNNF is a 0.33 µF ±10% 50V ceramic capacitor manufactured by Samsung Electro-Mechanics in the 1812 (4532 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) with X7R temperature coefficient operates across -55°C to 125°C and is classified as Active product status. Substitute parts are identified when original inventory is unavailable, when higher voltage or tighter tolerance specifications are required for circuit performance, or when alternative manufacturers offer equivalent electrical and mechanical characteristics within the same package footprint.

Key Parameters

Parameter	Value	Specification Basis
Capacitance	0.33 µF	Core electrical requirement
Voltage Rating	50V	Minimum rated voltage for application
Tolerance	±10%	Acceptable capacitance variation
Temperature Coefficient	X7R	Stability across operating range
Package / Case	1812 (4532 Metric)	Physical footprint and mounting compatibility
Mounting Type	Surface Mount, MLCC	Assembly process compatibility
Operating Temperature	-55°C to 125°C	Environmental performance range
RoHS Status	ROHS3 Compliant	Regulatory compliance requirement
Moisture Sensitivity Level	1 (Unlimited)	Handling and storage requirements

Substitute Part Grouping Explanation

Substitution logic for the CL43B334KBFNNNF is determined by strict adherence to the following criteria:

Direct Substitutes maintain all electrical parameters identical to the main part: 0.33 µF capacitance, ±10% tolerance, 50V voltage rating, X7R temperature coefficient, and 1812 package. These parts are functionally interchangeable without circuit redesign.

Upgrade Substitutes modify one or more electrical parameters while maintaining the same 1812 package footprint and surface mount assembly process. Upgrades include:

Tighter tolerance (±5% instead of ±10%)
Higher voltage rating (100V or 250V instead of 50V)

All substitute parts maintain X7R temperature coefficient, -55°C to 125°C operating range, ROHS3 compliance, and MSL 1 rating. Mechanical dimensions (0.177" L x 0.126" W / 4.50mm x 3.20mm) remain constant across all substitutes, ensuring PCB layout compatibility.

Parameter Comparison

Manufacturer	Part Number	Capacitance	Tolerance	Voltage	Temp Coeff	Package	Thickness (Max)	Substitution Type
Samsung Electro-Mechanics	CL43B334KBFNNNF	0.33 µF	±10%	50V	X7R	1812	0.057" (1.45mm)	Main Part
KEMET	C1812C334K5RAC7800	0.33 µF	±10%	50V	X7R	1812	0.043" (1.10mm)	Direct
KYOCERA AVX	KGM43AR71H334KV	0.33 µF	±10%	50V	X7R	1812	0.055" (1.40mm)	Direct
KEMET	C1812C334J5RAC7800	0.33 µF	±5%	50V	X7R	1812	0.043" (1.10mm)	Upgrade
KEMET	C1812C334JARAC7800	0.33 µF	±5%	250V	X7R	1812	0.065" (1.65mm)	Upgrade
KEMET	C1812C334K1RAC7800	0.33 µF	±10%	100V	X7R	1812	0.065" (1.65mm)	Upgrade
KEMET	C1812C334KARAC7800	0.33 µF	±10%	250V	X7R	1812	0.065" (1.65mm)	Upgrade
KYOCERA AVX	KGM43AR71H334JV	0.33 µF	±5%	50V	X7R	1812	0.055" (1.40mm)	Upgrade
KYOCERA AVX	KGM43BR72A334JV	0.33 µF	±5%	100V	X7R	1812	0.057" (1.45mm)	Upgrade
KYOCERA AVX	KGM43BR72A334KV	0.33 µF	±10%	100V	X7R	1812	0.057" (1.45mm)	Upgrade

Engineering Selection Recommendations

Direct Substitutes (C1812C334K5RAC7800, KGM43AR71H334KV) are selected when the original CL43B334KBFNNNF is unavailable. Both maintain identical electrical specifications and are ROHS3 compliant with MSL 1 rating. The KEMET variant offers reduced thickness (0.043" vs 0.057"), which may provide assembly advantages in space-constrained designs. The KYOCERA AVX variant maintains thickness comparable to the original part.

Upgrade Substitutes with Tighter Tolerance (C1812C334J5RAC7800, KGM43AR71H334JV) provide ±5% capacitance tolerance instead of ±10%. These are selected when circuit performance requires improved capacitance accuracy. Both maintain 50V rating and are suitable for direct replacement with enhanced precision.

Upgrade Substitutes with Higher Voltage Rating (C1812C334K1RAC7800, C1812C334KARAC7800, KGM43BR72A334JV, KGM43BR72A334KV) provide 100V or 250V ratings while maintaining 0.33 µF capacitance. These are selected when circuit operating conditions exceed 50V or when design margin for voltage transients is required. Higher voltage variants exhibit increased thickness (0.065" maximum), which must be verified against PCB assembly clearances.

All substitute parts are Active product status with ROHS3 compliance and MSL 1 rating, ensuring regulatory conformance and standard handling procedures.

Frequently Asked Questions (FAQ)

Q: Can C1812C334K5RAC7800 replace CL43B334KBFNNNF directly without circuit modification?

A: Yes. C1812C334K5RAC7800 maintains identical electrical specifications: 0.33 µF ±10% at 50V with X7R temperature coefficient. Both are 1812 package surface mount MLCCs with -55°C to 125°C operating range. The KEMET part exhibits reduced thickness (0.043" vs 0.057"), which is compatible with standard PCB assembly processes.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes (C1812C334K5RAC7800, KGM43AR71H334KV) maintain all electrical parameters identical to the main part. Upgrade substitutes modify one or more parameters: tolerance (±5% vs ±10%) or voltage rating (100V or 250V vs 50V). Upgrades are selected when enhanced performance specifications are required.

Q: Can I use a 250V rated capacitor in place of a 50V rated capacitor?

A: Yes, from an electrical standpoint. Higher voltage-rated capacitors (C1812C334JARAC7800, C1812C334KARAC7800) are physically compatible with 50V circuit applications. However, these parts exhibit increased thickness (0.065" maximum), which must be verified against PCB assembly height constraints and component placement requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the regulatory and handling requirements of the original CL43B334KBFNNNF.

Q: What is the significance of X7R temperature coefficient?

A: X7R temperature coefficient specifies capacitance stability across the -55°C to 125°C operating range. All substitute parts maintain X7R specification, ensuring consistent performance across the full temperature range without circuit redesign.

Q: Does package thickness affect PCB assembly compatibility?

A: Yes. Thickness variations range from 0.043" (KEMET direct substitutes) to 0.065" (higher voltage upgrades). Verify maximum component height against PCB assembly specifications, particularly in designs with tight vertical clearances or automated placement constraints.

Q: Which substitute offers the best tolerance specification?

A: Upgrade substitutes with ±5% tolerance (C1812C334J5RAC7800, KGM43AR71H334JV) provide tighter capacitance accuracy compared to the ±10% specification of the main part and direct substitutes. Select these when circuit performance requires improved capacitance precision.

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