Equivalent & Substitute Parts for 0805J2000391MXT

Part Overview

The Knowles Syfer 0805J2000391MXT is a 390 pF ceramic capacitor rated at 200V with X7R temperature coefficient, packaged in 0805 (2012 Metric) surface mount form factor. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are necessary when the original manufacturer part becomes unavailable, when design requirements demand improved tolerance specifications, or when higher voltage ratings are required for enhanced circuit reliability.

Substiute Parts

0805J2000391MXT

Knowles SyferIn Stock: 8010805J2000391MXT Datasheet

Current PartRFQ

08052C391KAT2A

KYOCERA AVXIn Stock: 1412608052C391KAT2A Datasheet

UpgradeRFQ

C0805C391J2GAC7800

KEMETIn Stock: 23254C0805C391J2GAC7800 Datasheet

MFR RecommendedRFQ

C0805C391JCGAC7800

KEMETIn Stock: 2080C0805C391JCGAC7800 Datasheet

MFR RecommendedRFQ

C2012C0G2W391J060AA

TDK CorporationIn Stock: 3826C2012C0G2W391J060AA Datasheet

MFR RecommendedRFQ

C2012C0G2W391K060AA

TDK CorporationIn Stock: 3489C2012C0G2W391K060AA Datasheet

MFR RecommendedRFQ

C2012NP02W391J060AA

TDK CorporationIn Stock: 4169C2012NP02W391J060AA Datasheet

MFR RecommendedRFQ

KGM21ECG2D391JU

KYOCERA AVXIn Stock: 8548KGM21ECG2D391JU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 0805J2000391MXT is determined by the following mandatory parameters:

Core Compatibility Requirements:

• Capacitance value: 390 pF (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Operating Temperature Range: -55°C to 125°C minimum (equal or extended range acceptable)
• RoHS Status: ROHS3 Compliant (mandatory)
• MSL Rating: 1 (Unlimited) (equal or better required)

Allowable Parameter Variations:

• Tolerance: May be equal or tighter (±20%, ±10%, ±5% acceptable)
• Voltage Rating: May be equal or higher (200V, 450V, 500V acceptable)
• Temperature Coefficient: X7R or C0G/NP0 acceptable (both meet general purpose applications)
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) acceptable

Substitute parts are grouped into three categories based on voltage rating and tolerance improvements: standard voltage upgrades with tighter tolerance, higher voltage options with C0G/NP0 characteristics, and manufacturer-specific variants maintaining 200V rating with improved tolerance.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (200V Rating, Active Status): The 08052C391KAT2A (KYOCERA AVX) and C0805C391J2GAC7800 (KEMET) are suitable direct replacements. Both maintain 200V voltage rating with Active product status. The KYOCERA AVX part offers ±10% tolerance with reduced thickness (0.94 mm), while the KEMET part provides ±5% tolerance with C0G/NP0 characteristics and further reduced thickness (0.88 mm). The KGM21ECG2D391JU (KYOCERA AVX) provides ±5% tolerance with C0G/NP0 temperature coefficient at 200V rating and Active status.

For Enhanced Voltage Margin (Higher Voltage Ratings): The C0805C391JCGAC7800 (KEMET, 500V) and TDK Corporation parts (C2012C0G2W391J060AA and C2012C0G2W391K060AA at 450V) provide increased voltage headroom. These parts feature C0G/NP0 temperature coefficient with improved tolerance specifications. The C2012NP02W391J060AA extends operating temperature to 150°C. Note that TDK parts carry Last Time Buy status, indicating limited future availability.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) rating, ensuring compatibility with standard manufacturing and storage requirements. Active status parts (KYOCERA AVX and KEMET) are preferred for new designs requiring long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher voltage rating in place of the 0805J2000391MXT?

A: Yes. Higher voltage-rated parts (450V or 500V) are electrically compatible substitutes. The circuit will operate safely with increased voltage margin. Physical dimensions must remain within 0805 (2012 Metric) package constraints.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients?

A: X7R provides ±15% capacitance variation across -55°C to 125°C operating range. C0G/NP0 provides ±30 ppm/°C or better stability, resulting in minimal capacitance drift across temperature. C0G/NP0 is preferred for precision applications requiring stable capacitance values.

Q: Does tolerance affect substitution compatibility?

A: Tighter tolerance (±10% or ±5%) is compatible with designs specified for ±20%. Looser tolerance is not acceptable. If circuit design requires ±20% tolerance, parts with ±10% or ±5% will function correctly.

Q: Are Tape & Reel (TR) and Cut Tape (CT) packaging interchangeable?

A: Both formats contain identical components. Packaging format affects handling and automated assembly processes. TR is standard for high-volume automated pick-and-place operations. CT is suitable for lower-volume or manual assembly. Component electrical and mechanical specifications remain identical.

Q: Why do some substitute parts show Last Time Buy status?

A: Last Time Buy indicates the manufacturer has discontinued or will discontinue production. These parts remain available in current inventory but future procurement may not be possible. Active status parts are recommended for designs requiring long-term component availability.

Q: Can I substitute the 0805J2000391MXT with a part having different physical thickness?

A: Physical thickness variation is acceptable provided the component fits within the PCB assembly constraints. Verify clearance with surrounding components and solder reflow profile compatibility. All listed substitutes maintain 0805 (2012 Metric) package dimensions.