CDR31BP181BFMSAT Equivalent & Substitute Parts

Part Overview

The CDR31BP181BFMSAT is a 180 pF ±1% 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 1032 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or procurement requirements necessitate alternative sourcing from qualified manufacturers.

Substiute Parts

CDR31BP181BFMSAT

Vishay VitramonIn Stock: 1043CDR31BP181BFMSAT Datasheet

Current PartRFQ

CDR31BP181BFUS7185

KEMETIn Stock: 1302CDR31BP181BFUS7185 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDR31BP181BFMSAT is determined by strict equivalence across the following electrical and mechanical parameters:

• Capacitance value: 180 pF
• Tolerance: ±1%
• Rated voltage: 100V
• Temperature coefficient: BP
• Operating temperature range: -55°C ~ 125°C
• Package type: 0805 (2012 Metric)
• Physical dimensions: 0.079" L x 0.049" W (2.00mm x 1.25mm)
• Thickness: 0.051" (1.30mm) maximum
• Failure rate classification: S (0.001%)
• Series compliance: MIL-PRF-55681, CDR31

Parts meeting all these parameters are classified as parametric equivalents and may be substituted in applications where the original part is unavailable. Compliance certifications and packaging formats may differ between manufacturers while maintaining functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the CDR31BP181BFMSAT and CDR31BP181BFUS7185 are active military-grade ceramic capacitors meeting MIL-PRF-55681 specifications with identical electrical and mechanical parameters. Selection between these parts should be based on the following factors:

The CDR31BP181BFMSAT (Vishay Vitramon) carries ROHS3 compliance certification, making it suitable for applications subject to RoHS regulatory requirements. The CDR31BP181BFUS7185 (KEMET) is RoHS non-compliant and REACH-affected, requiring evaluation against specific application and regional compliance mandates.

Packaging format differs between manufacturers: the KEMET part is supplied in Tape & Reel (TR) format, while the Vishay part packaging is not specified in available data. Procurement volume and assembly line compatibility should be considered when selecting between packaging formats.

Both parts maintain identical failure rate classifications (S, 0.001%), operating temperature ranges (-55°C ~ 125°C), and moisture sensitivity levels (MSL 1, Unlimited), ensuring functional interchangeability in high-reliability military applications.

Frequently Asked Questions (FAQ)

Q: Can CDR31BP181BFUS7185 be used as a direct replacement for CDR31BP181BFMSAT?

A: Yes, the CDR31BP181BFUS7185 is a parametric equivalent with identical capacitance (180 pF), tolerance (±1%), voltage rating (100V), temperature coefficient (BP), operating temperature range (-55°C ~ 125°C), package type (0805), and failure rate (S, 0.001%). However, RoHS compliance status differs; verify regulatory requirements for your application before substitution.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by exact matching of: capacitance value (180 pF), tolerance (±1%), rated voltage (100V), temperature coefficient (BP), operating temperature range (-55°C ~ 125°C), package designation (0805 / 2012 Metric), physical dimensions (0.079" L x 0.049" W, 2.00mm x 1.25mm), maximum thickness (0.051" / 1.30mm), and failure rate classification (S, 0.001%). All parameters must match for functional equivalence.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) packaging is a procurement and assembly format only and does not affect the electrical or mechanical characteristics of the capacitor. Selection between packaging formats depends on assembly line equipment compatibility and procurement volume requirements.

Q: Are there compliance differences between these parts?

A: Yes. The CDR31BP181BFMSAT is ROHS3 compliant, while the CDR31BP181BFUS7185 is RoHS non-compliant and REACH-affected. Applications subject to RoHS or REACH regulations must use the Vishay part or verify exemption applicability for the KEMET part.

Q: What is the failure rate significance of the "S" classification?

A: The S classification indicates a failure rate of 0.001% per 1000 hours, meeting military-grade reliability standards. Both parts carry identical S-level failure rate classifications, ensuring equivalent reliability performance in high-reliability applications.