C2012JB1V685K125AC Equivalent & Substitute Parts

Part Overview

The C2012JB1V685K125AC is a 6.8 µF ±10% 35V ceramic capacitor manufactured by TDK Corporation in 0805 (2012 Metric) surface mount package. This multilayer ceramic capacitor (MLCC) features a JB temperature coefficient and low ESL characteristics suitable for general purpose applications. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing and future production requirements.

Substiute Parts

C2012JB1V685K125AC

TDK CorporationIn Stock: 2053C2012JB1V685K125AC Datasheet

Current PartRFQ

C2012X5R1V685K125AC

TDK CorporationIn Stock: 16239C2012X5R1V685K125AC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the C2012JB1V685K125AC is determined by the following critical parameters:

• Capacitance Value: 6.8 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 35V (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Physical Dimensions: 0.079" L x 0.049" W, 0.057" max thickness (exact match required)
• RoHS Compliance: ROHS3 Compliant (required for regulatory compliance)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The substitute part C2012X5R1V685K125AC meets all critical substitution criteria. The primary difference is the temperature coefficient classification (X5R vs. JB), which represents a broader operating temperature range (-55°C ~ 85°C vs. -25°C ~ 85°C) while maintaining identical electrical and mechanical specifications for the core application parameters.

Parameter Comparison

Engineering Selection Recommendations

The C2012X5R1V685K125AC is a qualified substitute for the C2012JB1V685K125AC based on matching electrical specifications, identical physical package dimensions, and equivalent regulatory compliance certifications. Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

The substitute part provides an extended operating temperature range (-55°C to 85°C versus -25°C to 85°C), which offers enhanced thermal performance margin for applications operating in lower temperature environments. This characteristic does not compromise compatibility with designs specified for the original JB temperature coefficient part.

Both parts maintain identical capacitance, voltage rating, tolerance, and physical form factor, ensuring direct functional equivalence in circuit applications. The substitute part is currently available in higher inventory quantities (16,180 pcs vs. 2,042 pcs), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can C2012X5R1V685K125AC be used as a direct replacement for C2012JB1V685K125AC?

A: Yes. Both parts share identical capacitance (6.8 µF), voltage rating (35V), tolerance (±10%), package dimensions (0805/2012 Metric), and compliance certifications. The substitute part's X5R temperature coefficient provides a wider operating range (-55°C to 85°C) compared to the original JB specification (-25°C to 85°C), making it functionally compatible for all applications within the original temperature specification.

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

A: Temperature coefficient classification indicates the capacitance variation across the operating temperature range. JB and X5R are both standard IEC classifications for ceramic capacitors. The X5R classification provides a broader temperature operating range while maintaining the same capacitance tolerance specification. For applications operating within -25°C to 85°C, both classifications perform equivalently.

Q: Are the physical dimensions identical between the two parts?

A: Yes. Both parts are packaged in 0805 (2012 Metric) form factor with identical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum thickness of 0.057" (1.45mm). They are mechanically interchangeable on PCB layouts.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both C2012JB1V685K125AC and C2012X5R1V685K125AC are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory compliance standards.

Q: Why is the original part marked as Last Time Buy?

A: Last Time Buy status indicates that TDK Corporation has discontinued production of the C2012JB1V685K125AC. The C2012X5R1V685K125AC is available as a qualified substitute to ensure design continuity and supply chain reliability for ongoing production requirements.