C2012JB1V335K125AC Equivalent & Substitute Parts

Part Overview

The C2012JB1V335K125AC is a 3.3 µF ±10% 35V ceramic capacitor manufactured by TDK Corporation in 0805 (2012 Metric) package format. This multilayer ceramic capacitor (MLCC) features low ESL characteristics and is designed for general-purpose applications. The part is designated as Last Time Buy, indicating limited availability and the necessity to identify equivalent alternatives for ongoing production requirements.

Key Parameters

Parameter	Value
Capacitance	3.3 µF
Tolerance	±10%
Voltage - Rated	35V
Temperature Coefficient	JB
Operating Temperature Range	-25°C ~ 85°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the C2012JB1V335K125AC is determined by the following mandatory parameters:

Capacitance: 3.3 µF (exact match required)
Tolerance: ±10% (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)
Voltage - Rated: 35V or higher (equal or greater voltage rating acceptable)
Temperature Coefficient: JB, X5R, X6S, or X7R (alternative coefficients acceptable if operating temperature range meets or exceeds original specification)
RoHS Status: ROHS3 Compliant (compliance required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Substitute parts are grouped into two categories:

Category 1 - Direct Voltage Upgrade (50V rated): Parts with identical electrical characteristics except for higher voltage rating, providing enhanced safety margin.

Category 2 - Temperature Coefficient Alternatives (X5R, X6S, X7R): Parts with improved temperature stability characteristics while maintaining or exceeding the original operating temperature range.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Temp. Coeff.	Operating Temp.	Package	Status	Inventory
C2012JB1V335K125AC	TDK	3.3 µF	±10%	35V	JB	-25°C ~ 85°C	0805	Last Time Buy	4183 Pcs
C2012JB1H335K125AB	TDK	3.3 µF	±10%	50V	JB	-25°C ~ 85°C	0805	Last Time Buy	1195 Pcs
C2012X5R1H335K125AB	TDK	3.3 µF	±10%	50V	X5R	-55°C ~ 85°C	0805	Not For New Designs	41910 Pcs
C2012X5R1V335K125AC	TDK	3.3 µF	±10%	35V	X5R	-55°C ~ 85°C	0805	Not For New Designs	2086 Pcs
C2012X6S1H335K125AC	TDK	3.3 µF	±10%	50V	X6S	-55°C ~ 105°C	0805	Not For New Designs	1993 Pcs
C2012X6S1V335K125AB	TDK	3.3 µF	±10%	35V	X6S	-55°C ~ 105°C	0805	Not For New Designs	1739 Pcs
C2012X7R1V335K125AC	TDK	3.3 µF	±10%	35V	X7R	-55°C ~ 125°C	0805	Not For New Designs	120650 Pcs
CL21A335KPFNNNE	Samsung Electro-Mechanics	3.3 µF	±10%	10V	X5R	-55°C ~ 85°C	0805	Active	2300 Pcs

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs)

C2012X7R1V335K125AC is the preferred substitute. It maintains the 35V voltage rating of the original part while providing extended operating temperature range (-55°C ~ 125°C) and superior temperature stability through X7R coefficient. High inventory availability (120650 Pcs) ensures supply continuity. ROHS3 compliance and MSL 1 rating match the original specification.

Secondary Substitutes (Voltage Upgrade Path)

C2012X5R1H335K125AB and C2012X6S1H335K125AC provide 50V voltage rating with improved temperature coefficients (X5R and X6S respectively). These parts are suitable for applications requiring enhanced voltage margin. C2012X6S1H335K125AC offers the widest operating temperature range (-55°C ~ 105°C) among 50V options.

Compatibility Note

CL21A335KPFNNNE (Samsung Electro-Mechanics) is not suitable as a direct substitute due to insufficient voltage rating (10V versus 35V required). This part does not meet the electrical requirements of the original application.

Frequently Asked Questions (FAQ)

Q: Can C2012X7R1V335K125AC replace C2012JB1V335K125AC in existing designs?

A: Yes. Both parts share identical capacitance (3.3 µF), tolerance (±10%), voltage rating (35V), and 0805 package. The X7R temperature coefficient provides superior stability across the extended operating range (-55°C ~ 125°C) compared to JB (-25°C ~ 85°C). All compliance certifications (ROHS3, MSL 1) are equivalent.

Q: What is the difference between JB, X5R, X6S, and X7R temperature coefficients?

A: Temperature coefficient designates capacitance variation across operating temperature ranges. JB provides ±10% capacitance change over -25°C ~ 85°C. X5R, X6S, and X7R offer tighter tolerances over wider temperature ranges: X5R (-55°C ~ 85°C), X6S (-55°C ~ 105°C), and X7R (-55°C ~ 125°C). Selection depends on application temperature requirements.

Q: Is the 50V rated C2012JB1H335K125AB compatible with 35V circuit requirements?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage applications. The 50V rating provides additional safety margin and is acceptable for 35V circuits. No circuit modification is required.

Q: Why is CL21A335KPFNNNE listed as a substitute if it cannot replace the original part?

A: CL21A335KPFNNNE shares identical capacitance, tolerance, package, and mounting type but has insufficient voltage rating (10V). It is listed in cross-reference data but is not functionally equivalent for this 35V application.

Q: What packaging format is used for these parts?

A: All listed parts use 0805 (2012 Metric) surface mount package with identical physical dimensions (0.079" L x 0.049" W / 2.00mm x 1.25mm). They are directly interchangeable on PCB layouts without modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with current manufacturing and environmental standards.

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