CDR31BX103AMYRAT Equivalent & Substitute Parts

Part Overview

The CDR31BX103AMYRAT is a military-grade ceramic capacitor manufactured by Vishay Vitramon, rated at 10000 pF with 50V voltage rating and BX temperature coefficient. This component is part of the MIL-PRF-55681 certified CDR31 series and is designed for high-reliability applications requiring extended operating temperature ranges from -55°C to 125°C. The part is currently active in production with 710 units in stock. Substitute parts are identified when equivalent electrical and mechanical specifications are met within the allowed parameter tolerances for this product category.

Substiute Parts

CDR31BX103AMYRAT

Vishay VitramonIn Stock: 727CDR31BX103AMYRAT Datasheet

Current PartRFQ

CDR31BX103AKUR

KEMETIn Stock: 3404CDR31BX103AKUR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR31BX103AMYRAT is determined by the following critical parameters:

• Capacitance Value: Must be 10000 pF
• Voltage Rating: Must be 50V or higher
• Temperature Coefficient: Must be BX
• Operating Temperature Range: Must support -55°C to 125°C
• Package / Case: Must be 0805 (2012 Metric)
• Mounting Type: Must be Surface Mount, MLCC
• Series Compliance: Must be MIL-PRF-55681 certified CDR31 series
• Failure Rate: Must maintain R (0.01%) classification

The CDR31BX103AKUR meets all substitution criteria. Tolerance variation (±10% versus ±20%) is within acceptable limits for this application category and does not disqualify the substitute part.

Parameter Comparison

Engineering Selection Recommendations

The CDR31BX103AKUR (KEMET) is a qualified substitute for the CDR31BX103AMYRAT (Vishay Vitramon) based on electrical and mechanical parameter equivalence. Both parts are active products certified to MIL-PRF-55681 with identical capacitance, voltage rating, temperature coefficient, and operating temperature specifications.

The CDR31BX103AKUR offers improved tolerance specification (±10% versus ±20%), which provides tighter capacitance control. Both parts maintain identical failure rate classification and moisture sensitivity levels.

Compliance considerations: The CDR31BX103AMYRAT is ROHS3 compliant, while the CDR31BX103AKUR is RoHS non-compliant and REACH affected. Selection between these parts must account for end-application regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CDR31BX103AKUR replace CDR31BX103AMYRAT in all applications?

A: Yes, provided that RoHS and REACH compliance requirements do not restrict the use of the KEMET part. Both components meet identical electrical specifications for capacitance, voltage rating, temperature coefficient, and operating temperature range.

Q: What is the significance of the tolerance difference (±10% vs ±20%)?

A: The CDR31BX103AKUR provides tighter capacitance tolerance, meaning the actual capacitance value will remain closer to the nominal 10000 pF specification. This may be beneficial in precision applications but is not a disqualifying factor for substitution in standard high-reliability circuits.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 0805 (2012 Metric) package with identical length, width, and maximum thickness specifications, ensuring mechanical compatibility in PCB layouts.

Q: Do both parts meet military specifications?

A: Yes. Both CDR31BX103AMYRAT and CDR31BX103AKUR are certified to MIL-PRF-55681 and maintain the R (0.01%) failure rate classification required for high-reliability military applications.

Q: What packaging options are available?

A: The CDR31BX103AMYRAT is available in standard packaging. The CDR31BX103AKUR is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes.