CDR33BX104AMMSAT Equivalent & Substitute Parts

Part Overview

The CDR33BX104AMMSAT is a 0.1 µF ±20% 50V ceramic capacitor in 1210 (3225 Metric) package manufactured by Vishay Vitramon. This military-grade MLCC operates across -55°C to 125°C with BX temperature coefficient and S-level failure rate (0.001%), meeting MIL-PRF-55681 specifications for high-reliability applications. The part is currently active with 703 units in stock. Substitute parts are identified where electrical parameters (capacitance, voltage rating, temperature range, failure rate) and mechanical specifications (package, dimensions) remain equivalent or superior, enabling direct replacement in circuit designs.

Substiute Parts

CDR33BX104AMMSAT

Vishay VitramonIn Stock: 720CDR33BX104AMMSAT Datasheet

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CDR33BX104AKWSAT

Vishay VitramonIn Stock: 2730CDR33BX104AKWSAT Datasheet

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CDR33BX104AKUS

KYOCERA AVXIn Stock: 864CDR33BX104AKUS Datasheet

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CDR33BX104AKUS7370

KEMETIn Stock: 1912CDR33BX104AKUS7370 Datasheet

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CDR33BX104AKUS7956

KEMETIn Stock: 3749CDR33BX104AKUS7956 Datasheet

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CDR33BX104AKWS7185

KEMETIn Stock: 3747CDR33BX104AKWS7185 Datasheet

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CDR33BX104AKYS

KEMETIn Stock: 1377CDR33BX104AKYS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

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

• Capacitance: 0.1 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)
• Failure Rate: S (0.001%) (exact match required)
• Package / Case: 1210 (3225 Metric) (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

All identified substitute parts meet these criteria. Tolerance variations (±20% to ±10%) and thickness differences (0.049" to 0.059") are within acceptable substitution parameters for this component category. RoHS compliance status and packaging format (Tape & Reel) do not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain electrical equivalence with the CDR33BX104AMMSAT across capacitance, voltage rating, temperature coefficient, operating range, and failure rate specifications. Selection should be based on the following criteria:

RoHS Compliance Requirement: If ROHS3 compliance is mandated, CDR33BX104AKYS (KEMET) is the only substitute option among the alternatives, with 1332 units available. The original part CDR33BX104AMMSAT also meets ROHS3 compliance.

Tolerance Improvement: All substitute parts offer ±10% tolerance compared to the original ±20%, providing tighter capacitance control where circuit performance benefits from reduced variation.

Thickness Consideration: CDR33BX104AKWSAT maintains the original 0.049" (1.25mm) maximum thickness. All other substitutes (CDR33BX104AKUS, CDR33BX104AKUS7370, CDR33BX104AKUS7956, CDR33BX104AKWS7185, CDR33BX104AKYS) have 0.059" (1.50mm) maximum thickness. PCB layout constraints may dictate thickness selection.

Inventory Availability: CDR33BX104AKUS7956 (KEMET) offers the highest stock level at 3670 units, followed by CDR33BX104AKWS7185 (KEMET) at 3664 units.

Manufacturer Diversity: KEMET variants provide four distinct part numbers with consistent specifications, supporting supply chain redundancy.

Frequently Asked Questions (FAQ)

Q: Can CDR33BX104AKYS be used as a direct replacement for CDR33BX104AMMSAT?

A: Yes. Both parts share identical electrical specifications (0.1 µF, ±tolerance, 50V, BX coefficient, -55°C to 125°C, S failure rate) and mechanical compatibility (1210 package, surface mount). CDR33BX104AKYS offers improved tolerance (±10% vs ±20%) and maintains ROHS3 compliance. The 0.059" thickness is 0.010" greater than the original; verify PCB clearance if height-constrained.

Q: What is the difference between CDR33BX104AKWSAT and other KEMET substitutes?

A: CDR33BX104AKWSAT is manufactured by Vishay Vitramon, not KEMET. It maintains the original 0.049" (1.25mm) thickness while offering ±10% tolerance. All other substitutes (KEMET variants) have 0.059" (1.50mm) thickness. Electrical performance is identical across all options.

Q: Are there any compliance differences between substitute parts?

A: RoHS compliance differs. CDR33BX104AKYS and the original CDR33BX104AMMSAT are ROHS3 compliant. All other substitutes are RoHS non-compliant. REACH status varies: KYOCERA AVX CDR33BX104AKUS is REACH Affected; KEMET parts are REACH Unaffected. Verify compliance requirements for your application before selection.

Q: Does tolerance change affect circuit performance?

A: Tolerance affects capacitance variation limits. The original ±20% tolerance allows 0.08 µF to 0.12 µF variation. Substitutes with ±10% tolerance allow 0.09 µF to 0.11 µF variation, providing tighter control. For applications sensitive to capacitance value, the improved tolerance of substitutes may enhance performance stability.

Q: Can I use CDR33BX104AKUS (KYOCERA AVX) if thickness is not a constraint?

A: Yes. CDR33BX104AKUS meets all electrical and mechanical requirements with 0.059" (1.50mm) thickness. It offers ±10% tolerance and maintains the 1210 package format. Inventory availability is 768 units. Verify REACH compliance requirements, as this part is REACH Affected.

Q: Which substitute offers the best availability?

A: CDR33BX104AKUS7956 (KEMET) has the highest inventory at 3670 units, followed by CDR33BX104AKWS7185 (KEMET) at 3664 units. Both maintain identical electrical specifications and 0.059" thickness.