CDR31BP181BJZSAT Equivalent & Substitute Parts

Part Overview

The CDR31BP181BJZSAT is a 180 pF ±5% 100V ceramic capacitor in 0805 (2012 Metric) surface mount package, manufactured by Vishay Vitramon. This component is part of the military-grade CDR31 series compliant with MIL-PRF-55681 and is designed for high-reliability applications. The part is currently active in production with 989 units in stock. Equivalent and substitute parts are identified when component availability is limited, procurement lead times are extended, or design flexibility permits tolerance or manufacturer variations within specified electrical and mechanical parameters.

Substiute Parts

CDR31BP181BJZSAT

Vishay VitramonIn Stock: 1045CDR31BP181BJZSAT Datasheet

Current PartRFQ

CDR31BP181BFUS7185

KEMETIn Stock: 1302CDR31BP181BFUS7185 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the CDR31BP181BJZSAT is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 180 pF (exact match required)
• Voltage Rating: 100V (minimum acceptable)
• Temperature Coefficient: BP (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum acceptable)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Physical Dimensions: 0.079" L x 0.049" W, Thickness 0.051" max (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Series Compliance: Military, MIL-PRF-55681, CDR31 (exact match required)
• Failure Rate: S (0.001%) (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The substitute part CDR31BP181BFUS7185 meets all critical substitution criteria. Tolerance variation (±1% vs. ±5%) represents an improvement in precision and does not restrict substitution eligibility.

Parameter Comparison

Engineering Selection Recommendations

Both the CDR31BP181BJZSAT and CDR31BP181BFUS7185 are active production components compliant with MIL-PRF-55681 military specifications. Selection between these parts is based on availability, packaging requirements, and tolerance specifications:

• CDR31BP181BJZSAT is suitable for applications where ±5% tolerance meets circuit requirements and bulk packaging is acceptable.
• CDR31BP181BFUS7185 provides tighter tolerance (±1%) and is supplied in Tape & Reel packaging, which may be preferred for automated assembly processes or applications requiring higher precision.

Both parts maintain identical electrical performance across voltage rating, capacitance value, temperature coefficient, and operating temperature range. Physical dimensions and mounting characteristics are identical, ensuring direct mechanical and electrical interchangeability within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can CDR31BP181BFUS7185 be used as a direct replacement for CDR31BP181BJZSAT?

A: Yes. Both parts share identical capacitance (180 pF), voltage rating (100V), temperature coefficient (BP), operating temperature range (-55°C ~ 125°C), package type (0805 / 2012 Metric), physical dimensions, and military compliance (MIL-PRF-55681). The substitute part features improved tolerance (±1% vs. ±5%), which does not restrict substitution.

Q: What is the difference in tolerance between these parts?

A: The main part has ±5% tolerance, while the substitute has ±1% tolerance. Tighter tolerance represents improved precision and is compatible with applications designed for the original ±5% specification.

Q: Are the physical dimensions identical?

A: Yes. Both parts are 0805 (2012 Metric) package with dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm) and maximum thickness of 0.051" (1.30mm). They are mechanically interchangeable.

Q: What is the difference in packaging?

A: CDR31BP181BJZSAT is supplied in bulk packaging, while CDR31BP181BFUS7185 is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes.

Q: Do both parts meet military specifications?

A: Yes. Both parts are compliant with MIL-PRF-55681 and are part of the military-grade CDR31 series with S-level failure rate (0.001%).

Q: Are there any compliance differences between these parts?

A: Both parts have identical moisture sensitivity level (MSL 1 - Unlimited) and ECCN classification (EAR99). The substitute part includes REACH Affected status, which should be verified against specific application requirements.