Equivalent & Substitute Parts for 0805J0100391FCT

Part Overview

The Knowles Syfer 0805J0100391FCT is a 390 pF ceramic capacitor rated at 10V with C0G/NP0 temperature coefficient in 0805 (2012 Metric) surface mount package. This component is actively produced and widely used in general-purpose applications requiring stable capacitance across temperature ranges from -55°C to 125°C. Substitute parts are identified based on matching capacitance value, tolerance, package form factor, and dielectric type while accommodating higher voltage ratings for enhanced design margin.

Substiute Parts

0805J0100391FCT

Knowles SyferIn Stock: 9460805J0100391FCT Datasheet

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C0805C391F5GAC7800

KEMETIn Stock: 6024C0805C391F5GAC7800 Datasheet

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KGM21BCG1H391FT

KYOCERA AVXIn Stock: 6548KGM21BCG1H391FT Datasheet

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KGM21BCG2A391FT

KYOCERA AVXIn Stock: 1330KGM21BCG2A391FT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0805J0100391FCT are qualified based on the following criteria:

Matching Parameters (Required for Substitution):

• Capacitance: 390 pF
• Tolerance: ±1%
• Temperature Coefficient: C0G, NP0
• Package / Case: 0805 (2012 Metric)
• Mounting Type: Surface Mount, MLCC
• Operating Temperature Range: -55°C to 125°C
• RoHS3 Compliance
• Moisture Sensitivity Level: 1

Variable Parameter (Allowed Variation):

• Voltage Rating: Substitutes rated at 50V and 100V are acceptable as they exceed the original 10V specification, providing increased design margin without affecting electrical performance at the rated voltage.

All identified substitutes maintain identical capacitance, tolerance, temperature stability, and physical form factor while offering higher voltage ratings from manufacturers KEMET and KYOCERA AVX.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and full ROHS3 compliance with unlimited moisture sensitivity rating. Selection between substitutes depends on voltage margin requirements and availability:

• C0805C391F5GAC7800 (KEMET): 50V rating provides moderate voltage margin. Offers low ESL characteristic. Thinner profile (0.035" maximum thickness) compared to original specification.

• KGM21BCG1H391FT (KYOCERA AVX): 50V rating with KGM series C0G designation. Thickness of 0.037" maximum. Suitable for applications requiring 50V margin.

• KGM21BCG2A391FT (KYOCERA AVX): 100V rating provides maximum voltage margin. Thickness of 0.037" maximum. Appropriate for high-reliability applications or designs with elevated voltage stress conditions.

All substitutes are electrically and mechanically compatible with the original 0805J0100391FCT within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V or 100V rated capacitor in place of the 10V rated original part?

A: Yes. Higher voltage-rated capacitors of identical capacitance, tolerance, and temperature coefficient are direct substitutes. The higher voltage rating does not affect performance at the original 10V operating point and provides additional design margin.

Q: Are the physical dimensions compatible across all substitute parts?

A: All parts conform to the 0805 (2012 Metric) package standard with dimensions of 0.079" L x 0.049" W (2.00mm x 1.25mm). Thickness varies slightly between manufacturers (0.035" to 0.051" maximum), but all remain within standard 0805 specifications and are compatible with standard PCB footprints.

Q: Do all substitutes maintain the same temperature stability?

A: Yes. All substitute parts use C0G/NP0 temperature coefficient with operating range of -55°C to 125°C, identical to the original part.

Q: What is the difference between C0G and NP0 designations?

A: C0G and NP0 are equivalent designations for the same temperature coefficient class. Both terms refer to capacitors with negligible capacitance change across the operating temperature range.

Q: Are all parts RoHS compliant?

A: Yes. The original part and all substitutes are ROHS3 compliant with Moisture Sensitivity Level 1 (unlimited).