CBR04C309C1GAC Equivalent & Substitute Parts

Part Overview

The CBR04C309C1GAC is a 3 pF ceramic capacitor manufactured by KEMET, designed for RF and microwave applications requiring high-frequency performance. This surface-mount multilayer ceramic capacitor (MLCC) operates at 100V with C0G/NP0 temperature coefficient characteristics, delivering high Q factor and ultra-low ESR performance. The component is actively produced and ROHS3 compliant, with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to address inventory availability, tolerance requirements, or application-specific performance needs while maintaining electrical and mechanical compatibility.

Substiute Parts

CBR04C309C1GAC

KEMETIn Stock: 711CBR04C309C1GAC Datasheet

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CBR04C309B1GAC

KEMETIn Stock: 101140CBR04C309B1GAC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution between CBR04C309C1GAC and CBR04C309B1GAC is permissible based on the following criteria:

Matching Parameters (Substitution Basis):

• Capacitance: 3 pF (identical)
• Voltage Rating: 100V (identical)
• Temperature Coefficient: C0G, NP0 (identical)
• Package: 0402 (1005 Metric) (identical)
• Mounting Type: Surface Mount, MLCC (identical)
• Operating Temperature: -55°C ~ 125°C (identical)
• Series: CBR-SMD RF C0G (identical)
• Physical Dimensions: 0.039" L x 0.020" W, 0.022" max thickness (identical)
• Compliance: ROHS3, MSL 1, REACH Unaffected (identical)

Differentiating Parameter:

• Tolerance: CBR04C309C1GAC specifies ±0.25pF; CBR04C309B1GAC specifies ±0.1pF

The substitute part CBR04C309B1GAC provides tighter capacitance tolerance, making it suitable for applications requiring higher precision while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both CBR04C309C1GAC and CBR04C309B1GAC are active products manufactured by KEMET with identical compliance certifications (ROHS3, REACH Unaffected, EAR99 classification). Selection between these parts depends on tolerance requirements:

CBR04C309C1GAC (±0.25pF tolerance): Suitable for general RF and microwave applications where standard tolerance specifications are acceptable. This part maintains 688 units in current inventory.

CBR04C309B1GAC (±0.1pF tolerance): Appropriate for precision RF circuits, tuning networks, or applications requiring tighter capacitance control. This part has significantly higher inventory availability at 101,066 units.

Both parts are mechanically and electrically interchangeable within the 0402 package footprint and support identical operating conditions (-55°C to 125°C). Selection should be based on circuit tolerance requirements and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can CBR04C309B1GAC replace CBR04C309C1GAC in existing designs?

A: Yes. Both parts share identical capacitance (3 pF), voltage rating (100V), temperature coefficient (C0G/NP0), package (0402), and operating temperature range (-55°C to 125°C). The substitute part provides tighter tolerance (±0.1pF versus ±0.25pF), making it functionally compatible and suitable for direct substitution.

Q: What is the primary difference between these two parts?

A: The capacitance tolerance specification differs. CBR04C309C1GAC carries ±0.25pF tolerance, while CBR04C309B1GAC carries ±0.1pF tolerance. All other electrical and mechanical parameters are identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 0402 (1005 Metric) package with dimensions of 0.039" L x 0.020" W (1.00mm x 0.50mm) and maximum thickness of 0.022" (0.55mm). They are footprint-compatible and require no PCB layout modifications.

Q: Do both parts meet the same compliance requirements?

A: Yes. Both CBR04C309C1GAC and CBR04C309B1GAC are ROHS3 compliant, REACH unaffected, classified as EAR99, and carry MSL 1 (unlimited moisture sensitivity). They share identical HTSUS classification (8532.24.0020).

Q: Which part should be selected for precision tuning applications?

A: CBR04C309B1GAC is the appropriate selection for precision applications due to its tighter ±0.1pF tolerance specification, providing better capacitance accuracy compared to the ±0.25pF tolerance of CBR04C309C1GAC.

Q: Are there any thermal performance differences?

A: No. Both parts operate across the identical temperature range (-55°C to 125°C) with C0G/NP0 temperature coefficient, ensuring stable capacitance performance across the full operating envelope.