CDR31BP101BKWSAT Equivalent & Substitute Parts

Part Overview

The CDR31BP101BKWSAT is a 100 pF ±10% 100V ceramic capacitor in 0805 (2012 Metric) surface mount package, manufactured by Vishay Vitramon. This military-grade multilayer ceramic capacitor (MLCC) is specified to MIL-PRF-55681 with BP temperature coefficient and operates across -55°C to 125°C. The part is currently active in production with 830 units in stock. Equivalent and substitute parts are identified when electrical parameters, mechanical dimensions, and reliability ratings align within specified tolerances for direct circuit board replacement.

Substiute Parts

CDR31BP101BKWSAT

Vishay VitramonIn Stock: 875CDR31BP101BKWSAT Datasheet

Current PartRFQ

CDR01BP101BJUSAJ

Vishay VitramonIn Stock: 3925CDR01BP101BJUSAJ Datasheet

UpgradeRFQ

CDR01BP101BJUS7185

KEMETIn Stock: 1106CDR01BP101BJUS7185 Datasheet

UpgradeRFQ

CDR31BP101BFUS

KEMETIn Stock: 702CDR31BP101BFUS Datasheet

UpgradeRFQ

CDR31BP101BKWS

KEMETIn Stock: 2777CDR31BP101BKWS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Electrical Parameters: Capacitance value (100 pF), voltage rating (100V), and temperature coefficient (BP) must be identical across all substitute parts.

Tolerance Variance: The main part specifies ±10% tolerance. Substitute parts with tighter tolerances (±5% or ±1%) are classified as upgrades and remain electrically compatible, as they fall within the original specification window.

Mechanical Compatibility: All substitute parts maintain the 0805 (2012 Metric) package footprint with surface mount configuration, ensuring PCB layout compatibility.

Reliability & Certification: All parts comply with MIL-PRF-55681 military specification with identical failure rate (S, 0.001%) and moisture sensitivity level (MSL 1, Unlimited).

Manufacturer Variance: Vishay Vitramon and KEMET are both qualified manufacturers for this specification series, with equivalent performance ratings.

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): CDR31BP101BKWS is a parametric equivalent manufactured by KEMET. It maintains identical electrical specifications (100 pF, ±10%, 100V, BP) and mechanical dimensions (0.079" x 0.049", 1.30mm thickness) as the main part. This part is suitable for direct substitution in applications where the original manufacturer source is unavailable.

Upgrade Options (Tighter Tolerance): CDR01BP101BJUSAJ (Vishay Vitramon) and CDR01BP101BJUS7185 (KEMET) both provide ±5% tolerance, representing a performance upgrade from the ±10% specification. These parts are electrically compatible and may be substituted when improved capacitance accuracy is beneficial. Dimensional variance (0.080" x 0.050", 1.40mm thickness) is within acceptable PCB layout tolerances for 0805 package footprints.

Premium Upgrade (Tightest Tolerance): CDR31BP101BFUS (KEMET) offers ±1% tolerance with identical mechanical dimensions to the main part (0.079" x 0.049", 1.30mm thickness). This represents the highest precision option while maintaining full electrical and mechanical compatibility.

Compliance Considerations: All substitute parts maintain MIL-PRF-55681 military specification compliance, MSL 1 rating, and identical failure rate (S, 0.001%). RoHS non-compliance status is consistent across all options. KEMET-manufactured parts include REACH Affected designation; Vishay Vitramon parts do not specify REACH status in provided data.

Frequently Asked Questions (FAQ)

Q: Can CDR31BP101BKWS be used as a direct replacement for CDR31BP101BKWSAT?

A: Yes. CDR31BP101BKWS is a parametric equivalent with identical capacitance (100 pF), tolerance (±10%), voltage rating (100V), temperature coefficient (BP), and mechanical dimensions (0.079" x 0.049"). The only difference is the manufacturer (KEMET vs. Vishay Vitramon). Both are qualified to MIL-PRF-55681 with equivalent reliability ratings.

Q: What is the difference between the CDR01 and CDR31 series?

A: Both series comply with MIL-PRF-55681 military specification. The primary distinction is tolerance: CDR01 series parts offer ±5% tolerance, while CDR31 series parts offer ±10% tolerance. CDR31BP101BFUS (CDR31 series) provides ±1% tolerance as a special variant. All maintain identical electrical performance and operating characteristics for the 100 pF, 100V, BP specification.

Q: Are there dimensional differences between substitute parts?

A: CDR01BP101BJUSAJ and CDR01BP101BJUS7185 have slightly larger dimensions (0.080" x 0.050", 1.40mm thickness) compared to the main part and CDR31-series substitutes (0.079" x 0.049", 1.30mm thickness). These dimensional variations are within standard 0805 package tolerances and do not affect PCB footprint compatibility for standard 0805 land patterns.

Q: Can I substitute a ±5% tolerance part for a ±10% tolerance requirement?

A: Yes. A ±5% tolerance part is a tighter specification and falls within the ±10% tolerance window. CDR01BP101BJUSAJ and CDR01BP101BJUS7185 are electrically compatible upgrades for applications originally specified with ±10% tolerance.

Q: What is the MSL rating and why does it matter?

A: All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly, simplifying supply chain and manufacturing processes.

Q: Are all substitute parts military-grade?

A: Yes. All substitute parts comply with MIL-PRF-55681 military specification with failure rate S (0.001%), matching the reliability classification of the main part. All are suitable for military and high-reliability applications.