C2012JB1C685K085AC Equivalent & Substitute Parts

Part Overview

The C2012JB1C685K085AC is a 6.8 µF ±10% 16V ceramic capacitor manufactured by TDK Corporation in the 0805 (2012 Metric) package. This surface mount multilayer ceramic capacitor (MLCC) features low ESL characteristics and JB temperature coefficient, suitable 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	6.8 µF
Tolerance	±10%
Voltage - Rated	16V
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 of the C2012JB1C685K085AC is determined by the following critical parameters:

Primary Substitution Criteria:

Capacitance value: 6.8 µF (fixed requirement)
Tolerance: ±10% (fixed requirement)
Package / Case: 0805 (2012 Metric) (fixed requirement)
Mounting Type: Surface Mount, MLCC (fixed requirement)

Secondary Substitution Parameters (allow variation):

Voltage Rating: 16V or higher (uprating acceptable)
Temperature Coefficient: JB, X5R, X6S, or X7S (different coefficients with different temperature ranges)
Thickness: 0.039" (1.00mm) or 0.057" (1.45mm) (space-dependent)
Packaging Format: Cut Tape (CT) or Tape & Reel (TR) (procurement-dependent)

Substitute parts maintain identical capacitance, tolerance, and package dimensions while allowing voltage uprating and temperature coefficient variation based on application requirements.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Temp Coeff	Temp Range	Thickness	Packaging	Status
C2012JB1C685K085AC	TDK	6.8 µF	16V	JB	-25°C ~ 85°C	0.039" (1.00mm)	Cut Tape	Last Time Buy
C2012JB1C685K125AC	TDK	6.8 µF	16V	JB	-25°C ~ 85°C	0.057" (1.45mm)	Tape & Reel	Last Time Buy
C2012JB1E685K125AC	TDK	6.8 µF	25V	JB	-25°C ~ 85°C	0.057" (1.45mm)	Cut Tape	Last Time Buy
C2012JB1V685K125AC	TDK	6.8 µF	35V	JB	-25°C ~ 85°C	0.057" (1.45mm)	Cut Tape	Last Time Buy
C2012X5R1C685K085AC	TDK	6.8 µF	16V	X5R	-55°C ~ 85°C	0.039" (1.00mm)	Tape & Reel	Not For New Designs
C2012X5R1E685K125AC	TDK	6.8 µF	25V	X5R	-55°C ~ 85°C	0.057" (1.45mm)	Cut Tape & Digi-Reel	Not For New Designs
C2012X5R1V685K125AC	TDK	6.8 µF	35V	X5R	-55°C ~ 85°C	0.057" (1.45mm)	Tape & Reel	Not For New Designs
C2012X6S1C685K125AC	TDK	6.8 µF	16V	X6S	-55°C ~ 105°C	0.057" (1.45mm)	Tape & Reel	Not For New Designs
C2012X7S1C685K125AC	TDK	6.8 µF	16V	X7S	-55°C ~ 125°C	0.057" (1.45mm)	Tape & Reel	Not For New Designs

Engineering Selection Recommendations

Direct Replacement (Same Voltage & Temperature Coefficient): C2012JB1C685K125AC serves as the direct substitute when packaging format change from Cut Tape to Tape & Reel is acceptable. Both parts maintain 16V rating and JB temperature coefficient with identical electrical performance.

Voltage Uprating Substitutes (JB Temperature Coefficient): C2012JB1E685K125AC (25V) and C2012JB1V685K125AC (35V) provide higher voltage ratings while maintaining JB temperature coefficient and -25°C ~ 85°C operating range. These are suitable for applications requiring voltage margin without temperature range expansion.

Extended Temperature Range Substitutes (X5R Coefficient): C2012X5R1C685K085AC, C2012X5R1E685K125AC, and C2012X5R1V685K125AC expand the operating temperature range to -55°C ~ 85°C. These parts are designated Not For New Designs but remain available for legacy system support.

Enhanced Temperature Range Substitutes (X6S & X7S Coefficients): C2012X6S1C685K125AC (-55°C ~ 105°C) and C2012X7S1C685K125AC (-55°C ~ 125°C) provide the widest temperature operating ranges. Selection depends on application thermal requirements and space constraints (0.057" thickness).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical 6.8 µF capacitance with ±10% tolerance in the 0805 package footprint.

Frequently Asked Questions (FAQ)

Q: Can C2012JB1C685K125AC replace C2012JB1C685K085AC directly? A: Yes. Both parts share identical electrical specifications (6.8 µF, ±10%, 16V, JB coefficient, -25°C ~ 85°C). The difference is packaging format (Cut Tape vs. Tape & Reel) and thickness (0.039" vs. 0.057"). Verify PCB assembly equipment compatibility with the thicker profile.

Q: What is the difference between JB and X5R temperature coefficients? A: JB coefficient specifies -25°C ~ 85°C operating range with tighter capacitance stability in this band. X5R coefficient extends the range to -55°C ~ 85°C with broader temperature compensation. Select based on application minimum operating temperature requirement.

Q: Can I use a 25V or 35V rated part instead of 16V? A: Yes. Voltage uprating is a standard substitution practice. C2012JB1E685K125AC (25V) and C2012JB1V685K125AC (35V) provide additional voltage margin while maintaining identical capacitance and temperature characteristics. Physical thickness increases to 0.057".

Q: Are X5R, X6S, and X7S parts suitable for new designs? A: These parts are marked Not For New Designs. They remain available for legacy system support and field replacements but should not be selected for new product development. Prioritize JB coefficient parts for new applications.

Q: What is the significance of MSL 1 rating? A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life without moisture baking requirements. All listed substitutes carry MSL 1, eliminating moisture-related handling constraints during assembly.

Q: Does package thickness affect PCB layout? A: Yes. The original part is 0.039" (1.00mm) thick. Most substitutes are 0.057" (1.45mm). Verify clearance above the component location for solder reflow and component placement equipment. Consult PCB assembly guidelines if space is constrained.

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