CDR35BX334AMUSAT Equivalent & Substitute Parts

Part Overview

The CDR35BX334AMUSAT is a 0.33 µF ±20% 50V military-grade ceramic capacitor manufactured by Vishay Vitramon, classified under the MIL-PRF-55681 CDR35 series. This surface-mount multilayer ceramic capacitor (MLCC) in 1825 (4564 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 729 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained while offering improved tolerance grades or alternative sourcing from qualified manufacturers.

Substiute Parts

CDR35BX334AMUSAT

Vishay VitramonIn Stock: 745CDR35BX334AMUSAT Datasheet

Current PartRFQ

CDR35BX334AKWSAT

Vishay VitramonIn Stock: 1723CDR35BX334AKWSAT Datasheet

UpgradeRFQ

CDR35BX334AKUS7185

KEMETIn Stock: 1322CDR35BX334AKUS7185 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR35BX334AMUSAT is determined by strict adherence to the following electrical and mechanical parameters:

Core Substitution Criteria:

• Capacitance: 0.33 µF (exact match required)
• Voltage Rating: 50V (exact match required)
• Temperature Coefficient: BX (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Package / Case: 1825 (4564 Metric) (exact match required)
• Physical Dimensions: 0.177" L x 0.252" W (4.50mm x 6.40mm) (exact match required)
• Thickness: 0.059" (1.50mm) maximum (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Series Classification: Military, MIL-PRF-55681, CDR35 (exact match required)
• Failure Rate: S (0.001%) (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Variation:

• Tolerance: ±20% (main part) to ±10% (substitute parts) — tighter tolerance in substitutes represents improved performance and is acceptable for direct substitution
• Packaging Format: Bulk to Tape & Reel (TR) — packaging format variation does not affect electrical or mechanical compatibility
• Manufacturer: Vishay Vitramon to KEMET — both manufacturers produce qualified military-grade components to identical MIL-PRF-55681 specifications

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts CDR35BX334AKWSAT and CDR35BX334AKUS7185 are direct electrical and mechanical equivalents to the CDR35BX334AMUSAT. Selection between these options is based on the following factors:

CDR35BX334AKWSAT (Vishay Vitramon): Maintains manufacturer continuity with the original part while offering improved ±10% tolerance specification. This part is available in Tape & Reel packaging format with 1706 units in stock, providing higher inventory availability.

CDR35BX334AKUS7185 (KEMET): Provides equivalent performance from an alternative qualified military-grade manufacturer, also with ±10% tolerance specification. This part is available in Tape & Reel packaging format with 1213 units in stock. KEMET components are subject to REACH compliance requirements.

Both substitute parts maintain active product status, identical electrical specifications, and full mechanical compatibility with the original CDR35BX334AMUSAT. The choice between substitutes depends on procurement requirements, packaging preferences, and supply chain considerations.

Frequently Asked Questions (FAQ)

Q: Can CDR35BX334AKWSAT or CDR35BX334AKUS7185 be used as direct replacements for CDR35BX334AMUSAT?

A: Yes. Both substitute parts meet all electrical and mechanical requirements for direct substitution. They maintain identical capacitance (0.33 µF), voltage rating (50V), temperature coefficient (BX), operating temperature range (-55°C ~ 125°C), package dimensions (1825 / 4564 Metric), and military-grade specifications (MIL-PRF-55681, CDR35 series). The substitute parts offer improved tolerance (±10% versus ±20%), which represents enhanced performance.

Q: What is the difference between the packaging formats listed?

A: The main part CDR35BX334AMUSAT is supplied in bulk packaging, while both substitute parts (CDR35BX334AKWSAT and CDR35BX334AKUS7185) are supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for automated assembly processes and does not affect electrical or mechanical compatibility. The component itself remains identical.

Q: Why do the substitute parts have ±10% tolerance instead of ±20%?

A: The ±10% tolerance specification in the substitute parts represents a tighter, more precise tolerance grade compared to the ±20% tolerance of the main part. This is an improvement that does not restrict substitution; components with tighter tolerances are acceptable replacements for applications originally specified with looser tolerances.

Q: Are there any compliance differences between the substitute parts?

A: Both substitute parts are RoHS non-compliant and classified under ECCN EAR99, matching the main part. CDR35BX334AKUS7185 (KEMET) is additionally subject to REACH compliance requirements. All three parts maintain Moisture Sensitivity Level 1 (Unlimited).

Q: Can I mix these parts in the same assembly?

A: Yes. All three parts are electrically and mechanically equivalent and can be used interchangeably within the same circuit or assembly without design modifications or performance degradation.