CDR35BX334AMWSAT Equivalent & Substitute Parts

Part Overview

The CDR35BX334AMWSAT is a 0.33 µF ±20% 50V ceramic capacitor manufactured by Vishay Vitramon, designed for high-reliability military applications per MIL-PRF-55681. This surface-mount multilayer ceramic capacitor (MLCC) in 1825 (4564 Metric) package is currently active in production with 758 units in stock. Substitute parts are identified when inventory constraints, packaging requirements, or tolerance specifications necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

CDR35BX334AMWSAT

Vishay VitramonIn Stock: 844CDR35BX334AMWSAT 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 CDR35BX334AMWSAT is determined by strict equivalence across the following parameters:

• Capacitance value: 0.33 µF (exact match required)
• Voltage rating: 50V (exact match required)
• Temperature coefficient: BX (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)
• Package / Case: 1825 (4564 Metric) (exact match required)
• Mounting type: Surface Mount, MLCC (exact match required)
• Military series compliance: MIL-PRF-55681, CDR35 (exact match required)
• Failure rate classification: S (0.001%) (exact match required)

Tolerance variations (±20% to ±10%) are permitted substitutions when circuit design allows tighter tolerance specifications. Packaging format differences (bulk to Tape & Reel) do not affect electrical compatibility but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain full electrical and mechanical compatibility with the CDR35BX334AMWSAT. Selection between alternatives is based on the following factors:

CDR35BX334AKWSAT (Vishay Vitramon): Identical manufacturer sourcing with improved tolerance specification (±10% versus ±20%). Available in Tape & Reel packaging with higher inventory (1706 units). Maintains all military certifications and compliance classifications.

CDR35BX334AKUS7185 (KEMET): Cross-manufacturer substitute with equivalent electrical specifications and military qualification. Provides alternative sourcing path with 1213 units in stock. REACH compliance status differs from Vishay variant. Tape & Reel packaging format.

All three parts satisfy MIL-PRF-55681 military requirements, maintain identical failure rate classifications, and operate across the full -55°C to 125°C temperature range. Packaging format differences (standard versus Tape & Reel) do not affect circuit performance but influence procurement logistics and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can CDR35BX334AKWSAT replace CDR35BX334AMWSAT in existing designs?

A: Yes. Both parts share 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 military series compliance (MIL-PRF-55681, CDR35). The substitute features tighter tolerance (±10% versus ±20%), which is a performance improvement.

Q: What is the difference between the two substitute parts?

A: CDR35BX334AKWSAT is manufactured by Vishay Vitramon, while CDR35BX334AKUS7185 is manufactured by KEMET. Both meet identical electrical and mechanical specifications. The KEMET variant includes REACH compliance status notation. Inventory levels differ (1706 units versus 1213 units).

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) packaging is a delivery and handling format only. It does not alter electrical characteristics, thermal performance, or reliability ratings. Both standard and Tape & Reel packaged parts are electrically identical.

Q: Are all three parts qualified to MIL-PRF-55681?

A: Yes. The main part and both substitutes are qualified to MIL-PRF-55681 military standard with CDR35 series designation and S-class failure rate (0.001%).

Q: Can tolerance differences affect circuit operation?

A: Tolerance differences (±20% versus ±10%) affect capacitance accuracy. Circuits designed for ±20% tolerance will operate within specification with ±10% parts. Circuits requiring ±10% tolerance cannot use the ±20% main part. Verify circuit design requirements before selection.

Q: What is the moisture sensitivity level (MSL) rating?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.