CBR04C279C1GAC Equivalent & Substitute Parts

Part Overview

The CBR04C279C1GAC is a 2.7 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. The part is currently active in production with 645 pieces available in inventory. Substitute parts are identified to address application requirements, inventory availability, or tolerance specifications while maintaining electrical and mechanical compatibility.

Substiute Parts

CBR04C279C1GAC

KEMETIn Stock: 694CBR04C279C1GAC Datasheet

Current PartRFQ

CBR04C279B1GAC

KEMETIn Stock: 51161CBR04C279B1GAC Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CBR04C279C1GAC is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 2.7 pF (exact match required)
• Voltage Rating: 100V (minimum requirement)
• Temperature Coefficient: C0G/NP0 (required for frequency stability)
• Package / Case: 0402 (1005 Metric) (physical and electrical compatibility)
• Mounting Type: Surface Mount, MLCC (assembly compatibility)

Allowable Variation Parameters:

• Tolerance: Tighter tolerances (lower ±pF values) are acceptable substitutes
• Operating Temperature Range: Must encompass or equal the specified range
• Inventory Status: Substitute availability does not affect electrical compatibility

The identified substitute CBR04C279B1GAC maintains all mandatory parameters while offering improved tolerance specification (±0.1pF versus ±0.25pF), making it suitable for applications requiring tighter capacitance control.

Parameter Comparison

Engineering Selection Recommendations

CBR04C279C1GAC Selection Criteria:

• Use when tolerance specification of ±0.25pF meets application requirements
• Suitable for general RF and microwave applications with standard capacitance control
• Current inventory of 645 pieces supports immediate procurement

CBR04C279B1GAC Selection Criteria:

• Use when tighter tolerance of ±0.1pF is required for precision RF tuning circuits
• Recommended for applications requiring enhanced frequency stability and reduced capacitance drift
• Significantly higher inventory (51068 pieces) ensures supply chain continuity
• Both parts maintain identical ROHS3 compliance and REACH unaffected status

Both parts are active products from KEMET's CBR-SMD RF C0G series, ensuring long-term availability and consistent manufacturing quality. Selection between these parts depends solely on tolerance requirements and inventory availability, as all other electrical and mechanical parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can CBR04C279B1GAC replace CBR04C279C1GAC in existing designs?

A: Yes. The substitute part maintains identical capacitance (2.7 pF), voltage rating (100V), temperature coefficient (C0G/NP0), package (0402), and operating temperature range (-55°C ~ 125°C). The tighter tolerance (±0.1pF) of the substitute is a functional improvement and does not create incompatibility.

Q: What is the difference between ±0.25pF and ±0.1pF tolerance?

A: Tolerance defines the allowable deviation from the nominal 2.7 pF capacitance value. CBR04C279C1GAC allows deviation between 2.45 pF and 2.95 pF. CBR04C279B1GAC allows deviation between 2.6 pF and 2.8 pF. Tighter tolerance provides more precise capacitance control for frequency-critical applications.

Q: Are both parts physically 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 mechanically interchangeable on PCBs designed for 0402 surface-mount components.

Q: Do both parts have the same moisture sensitivity?

A: Yes. Both parts have Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

Q: Which part should be selected for new designs?

A: Selection depends on tolerance requirements. For applications requiring tighter capacitance control, CBR04C279B1GAC is appropriate. For standard RF applications, either part is suitable. Inventory availability favors CBR04C279B1GAC with 51068 pieces in stock.

Q: Are both parts RoHS compliant?

A: Yes. Both CBR04C279C1GAC and CBR04C279B1GAC are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.