CDR01BP330BKMSAT Equivalent & Substitute Parts

Part Overview

The CDR01BP330BKMSAT is a 33 pF ceramic capacitor rated at 100V with BP temperature coefficient, manufactured by Vishay Vitramon under the military-grade MIL-PRF-55681 specification. This surface-mount MLCC in 0805 (2012 Metric) package is designed for high-reliability applications requiring stable performance across -55°C to 125°C operating range. The part maintains active product status with 1022 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained while offering alternative sourcing, improved tolerance, or compliance advantages.

Substiute Parts

CDR01BP330BKMSAT

Vishay VitramonIn Stock: 1103CDR01BP330BKMSAT Datasheet

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CDR31BP330BFUS7185

KEMETIn Stock: 1341CDR31BP330BFUS7185 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CDR01BP330BKMSAT is determined by strict equivalence in the following parameters:

• Capacitance Value: Must be 33 pF (no deviation)
• Voltage Rating: Must be 100V or higher
• Temperature Coefficient: Must be BP
• Package / Case: Must be 0805 (2012 Metric)
• Mounting Type: Must be Surface Mount, MLCC
• Operating Temperature Range: Must cover -55°C to 125°C
• Military Specification Compliance: Must meet MIL-PRF-55681

The CDR31BP330BFUS7185 manufactured by KEMET qualifies as a substitute part. While it maintains identical capacitance, voltage rating, temperature coefficient, package, and operating temperature specifications, it offers improved tolerance (±1% versus ±10%) and equivalent failure rate classification. Both parts are certified to MIL-PRF-55681 military standards and maintain identical electrical performance within their respective tolerance bands.

Parameter Comparison

Engineering Selection Recommendations

CDR01BP330BKMSAT (Primary Part): Select this part when RoHS3 compliance is required for end-product certification. The ±10% tolerance is suitable for applications where capacitance variation within this band does not affect circuit performance. Active inventory status ensures immediate availability.

CDR31BP330BFUS7185 (Substitute Part): Select this part when tighter capacitance tolerance (±1%) is required for precision circuit tuning or frequency-critical applications. Both parts maintain identical military-grade MIL-PRF-55681 certification and failure rate classification. Note that this substitute is RoHS non-compliant and REACH-affected; verify compliance requirements for your end application before selection. Slightly reduced physical dimensions (0.079" L x 0.049" W versus 0.080" L x 0.050" W) and lower maximum thickness (0.051" versus 0.055") provide marginal space advantages in dense PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can CDR31BP330BFUS7185 be used as a direct replacement for CDR01BP330BKMSAT?

A: Yes, for applications where RoHS non-compliance is acceptable. Both parts are electrically and mechanically compatible, sharing identical capacitance, voltage rating, temperature coefficient, package, and operating temperature specifications. The CDR31 offers superior tolerance (±1% versus ±10%).

Q: What is the significance of the tolerance difference between these parts?

A: The CDR01 tolerates ±10% capacitance variation, while the CDR31 tolerates ±1%. In circuits sensitive to capacitance value—such as precision filters, oscillators, or timing circuits—the CDR31's tighter tolerance reduces performance variation. For general-purpose coupling or bypass applications, the ±10% tolerance of the CDR01 is typically sufficient.

Q: Are there physical compatibility concerns when substituting these parts?

A: Both parts use the 0805 (2012 Metric) package and are surface-mount MLCCs. The CDR31 is marginally smaller (0.079" L x 0.049" W versus 0.080" L x 0.050" W) and thinner (0.051" max versus 0.055" max). These dimensional differences are within standard PCB design tolerances and do not create placement or soldering issues.

Q: What compliance differences exist between these parts?

A: The CDR01 is RoHS3 compliant, while the CDR31 is RoHS non-compliant and REACH-affected. If your end product requires RoHS certification, the CDR01 is the appropriate selection. Both parts carry identical military MIL-PRF-55681 certification and EAR99 export classification.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both the CDR01BP330BKMSAT and CDR31BP330BFUS7185 are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which part should I select for new designs?

A: For new designs, the CDR01BP330BKMSAT is recommended as the primary choice due to RoHS3 compliance and active inventory status. The CDR31BP330BFUS7185 serves as a secondary option when tighter tolerance requirements justify the compliance trade-offs.