CDR31BP331BKZSAT Equivalent & Substitute Parts

Part Overview

The CDR31BP331BKZSAT is a 330 pF ceramic capacitor rated at 100V with ±10% tolerance, manufactured by Vishay Vitramon under the military-grade MIL-PRF-55681 series. This surface-mount multilayer ceramic capacitor (MLCC) in 0805 (2012 Metric) package is designed for high-reliability applications requiring stable performance across the -55°C to 125°C operating temperature range. The part maintains an active product status with 1021 units currently in stock. Equivalent and substitute parts are identified when design requirements allow for parameter flexibility or when supply chain considerations necessitate alternative sourcing while maintaining functional compatibility.

Substiute Parts

CDR31BP331BKZSAT

Vishay VitramonIn Stock: 1130CDR31BP331BKZSAT Datasheet

Current PartRFQ

CDR31BP331BJUS7185

KEMETIn Stock: 1029CDR31BP331BJUS7185 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR31BP331BKZSAT is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 330 pF (exact match required)
• Voltage rating: 100V (minimum; higher ratings acceptable)
• Temperature coefficient: BP (exact match required)
• Operating temperature range: -55°C to 125°C (minimum coverage required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Mounting type: Surface Mount, MLCC (exact match required)
• Series compliance: Military, MIL-PRF-55681 (exact match required)

Allowable Variation Parameters:

• Tolerance: ±10% or tighter (±5% acceptable as upgrade)
• Manufacturer: Different manufacturers permitted if all other parameters match
• Packaging format: Tape & Reel (TR) or bulk packaging acceptable

The substitute part CDR31BP331BJUS7185 meets all mandatory matching criteria and offers improved tolerance specification (±5% versus ±10%), making it functionally compatible for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the CDR31BP331BKZSAT and CDR31BP331BJUS7185 maintain active product status and comply with military-grade MIL-PRF-55681 specifications. The primary distinction is tolerance specification: the KEMET substitute offers ±5% tolerance compared to the Vishay Vitramon original's ±10% tolerance. This represents a tighter tolerance band, which may provide improved circuit performance in applications sensitive to capacitance variation. Both parts carry identical failure rate ratings (S, 0.001%), moisture sensitivity levels (MSL 1), and export classifications (EAR99). Selection between these parts should be based on tolerance requirements specific to the application circuit and inventory availability at the time of procurement.

Frequently Asked Questions (FAQ)

Q: Can CDR31BP331BJUS7185 be used as a direct replacement for CDR31BP331BKZSAT?

A: Yes. Both parts share identical capacitance (330 pF), voltage rating (100V), temperature coefficient (BP), operating temperature range (-55°C to 125°C), package (0805), and military series compliance (MIL-PRF-55681). The substitute offers improved tolerance (±5% versus ±10%), making it functionally compatible for direct substitution in the same PCB footprint.

Q: What is the significance of the ±5% tolerance improvement in the substitute part?

A: Tighter tolerance reduces capacitance variation across the specified range. Applications requiring precise capacitance values benefit from ±5% tolerance. Circuits with looser tolerance requirements can use either specification interchangeably.

Q: Are there any physical differences between these parts?

A: No. Both parts share identical physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm) and maximum thickness (0.051", 1.30mm). They are mechanically interchangeable in the same 0805 surface-mount footprint.

Q: Do both parts meet the same military specifications?

A: Yes. Both parts comply with MIL-PRF-55681 military-grade ceramic capacitor specifications and maintain identical failure rate ratings (S, 0.001%).

Q: What is the packaging difference between these parts?

A: The original CDR31BP331BKZSAT uses standard packaging, while the substitute CDR31BP331BJUS7185 is supplied in Tape & Reel (TR) format. Both formats are suitable for automated assembly processes.

Q: Are there any compliance or export restrictions affecting either part?

A: Both parts carry EAR99 export classification and are RoHS non-compliant. No differential compliance restrictions apply between the two parts.