CDR35BX334AMMSAT Equivalent & Substitute Parts

Part Overview

The CDR35BX334AMMSAT is a 0.33 µF ±20% 50V ceramic capacitor manufactured by Vishay Vitramon, qualified to MIL-PRF-55681 military standards. This surface mount multilayer ceramic capacitor (MLCC) in 1825 (4564 Metric) package is designed for high-reliability applications requiring military-grade performance and extended temperature operation from -55°C to 125°C. The part is currently active in production with 1170 units in stock. Equivalent and substitute parts are identified for applications requiring alternative tolerance specifications, different manufacturers, or specific packaging configurations while maintaining electrical and mechanical compatibility.

Substiute Parts

CDR35BX334AMMSAT

Vishay VitramonIn Stock: 1221CDR35BX334AMMSAT Datasheet

Current PartRFQ

CDR35BX334AKWSAT

Vishay VitramonIn Stock: 1723CDR35BX334AKWSAT Datasheet

UpgradeRFQ

CDR35BX334AKUS7185

KEMETIn Stock: 1322CDR35BX334AKUS7185 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR35BX334AMMSAT is determined by strict equivalence in the following critical parameters: capacitance value (0.33 µF), voltage rating (50V), temperature coefficient (BX), operating temperature range (-55°C to 125°C), package type (1825 / 4564 Metric), and mounting configuration (Surface Mount MLCC).

The identified substitute parts maintain all these core electrical and mechanical specifications. Tolerance variations (±20% to ±10%) represent an upgrade in precision capability and do not prevent substitution, as tighter tolerances are compatible with applications designed for the original tolerance band. Packaging format differences (bulk versus Tape & Reel) and manufacturer variations (Vishay Vitramon versus KEMET) are permissible substitutions provided all electrical parameters and physical dimensions remain within specification.

Parameter Comparison

Engineering Selection Recommendations

All three parts are active products qualified to MIL-PRF-55681 military standards with identical electrical performance and physical compatibility. Selection between these parts depends on specific application requirements:

CDR35BX334AMMSAT is the primary specification part with ±20% tolerance and ROHS3 compliance. This part is suitable for applications where RoHS3 certification is mandatory and tolerance of ±20% meets circuit requirements.

CDR35BX334AKWSAT provides improved tolerance specification (±10%) while maintaining Vishay Vitramon manufacturing continuity. This part is supplied in Tape & Reel format and is non-compliant with RoHS standards. Selection of this part is appropriate when tighter capacitance tolerance is required and RoHS compliance is not a constraint.

CDR35BX334AKUS7185 offers the same ±10% tolerance specification with KEMET as the alternative manufacturer. This part is supplied in Tape & Reel format, is RoHS non-compliant, and carries REACH Affected status. This part is suitable for applications requiring KEMET qualification or when KEMET supply chain continuity is preferred.

Frequently Asked Questions (FAQ)

Q: Can CDR35BX334AKWSAT or CDR35BX334AKUS7185 be used as direct replacements for CDR35BX334AMMSAT?

A: Yes. Both substitute parts maintain identical capacitance (0.33 µF), voltage rating (50V), temperature coefficient (BX), operating temperature range (-55°C to 125°C), package dimensions (1825 / 4564 Metric), and failure rate specifications. The ±10% tolerance of the substitutes is tighter than the ±20% of the original part and is compatible with applications designed for the original specification.

Q: What is the difference between bulk and Tape & Reel packaging?

A: The CDR35BX334AMMSAT is supplied in bulk packaging, while CDR35BX334AKWSAT and CDR35BX334AKUS7185 are supplied in Tape & Reel (TR) format. Both packaging formats contain the same electrical component. Tape & Reel format is optimized for automated assembly processes, while bulk packaging is suitable for manual assembly or lower-volume applications.

Q: Are there RoHS compliance differences between these parts?

A: Yes. CDR35BX334AMMSAT is ROHS3 compliant. Both CDR35BX334AKWSAT and CDR35BX334AKUS7185 are RoHS non-compliant. Applications requiring RoHS3 certification must use CDR35BX334AMMSAT. Applications without RoHS requirements may use any of the three parts.

Q: What does the ±10% tolerance upgrade mean for circuit performance?

A: The substitute parts with ±10% tolerance provide tighter capacitance accuracy compared to the ±20% tolerance of the original part. This means the actual capacitance value will be closer to the nominal 0.33 µF specification. Applications designed for ±20% tolerance will operate correctly with ±10% tolerance parts, as the tighter tolerance is a performance enhancement.

Q: Can I mix manufacturers (Vishay Vitramon and KEMET) in the same assembly?

A: Yes. Both manufacturers produce parts meeting identical MIL-PRF-55681 military specifications with the same electrical and mechanical parameters. Mixed manufacturer usage is permissible from an engineering compatibility standpoint. Supply chain or procurement policies may impose additional restrictions.

Q: What is the REACH Affected status on CDR35BX334AKUS7185?

A: REACH Affected status indicates the part may contain substances subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulations. Applications subject to REACH compliance requirements should confirm compatibility with this status before selection.