0805J0100392MXT Equivalent & Substitute Parts

Part Overview

The 0805J0100392MXT is a 3900 pF ceramic capacitor manufactured by Knowles Syfer, rated at 10V with X7R temperature coefficient in 0805 (2012 Metric) surface mount package. This part is Active status with 885 pieces in stock inventory. The component is designed for general purpose applications requiring stable capacitance across the operating temperature range of -55°C to 125°C. Substitute parts are identified when design requirements necessitate higher voltage ratings, improved tolerance specifications, or alternative temperature coefficient characteristics while maintaining the same capacitance value and package footprint.

Key Parameters

Parameter	Value
Capacitance	3900 pF
Voltage Rating	10V
Tolerance	±20%
Temperature Coefficient	X7R
Package / Case	0805 (2012 Metric)
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 0805J0100392MXT is determined by the following criteria:

Capacitance Value: All substitute parts maintain 3900 pF capacitance to ensure functional equivalence in the circuit.

Package Footprint: All substitutes use 0805 (2012 Metric) surface mount package for direct mechanical and electrical compatibility.

Temperature Coefficient: Substitutes are grouped into two categories: X7R dielectric (matching the original) and C0G/NP0 dielectric (offering superior temperature stability). Both maintain the -55°C to 125°C operating range.

Voltage Rating: Substitute parts are available at 16V, 25V, 50V, and 100V ratings. Higher voltage ratings provide design margin and are electrically compatible with 10V applications.

Tolerance: Substitute parts offer ±5% and ±10% tolerances, providing tighter capacitance control compared to the original ±20% specification.

Compliance: All substitutes maintain ROHS3 compliance, MSL 1 rating, and EAR99 ECCN classification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Temperature Coefficient	Thickness (Max)	Inventory	Product Status
0805J0100392MXT	Knowles Syfer	3900 pF	10V	±20%	X7R	0.051" (1.30mm)	885 Pcs	Active
C0805C392J5RAC7800	KEMET	3900 pF	50V	±5%	X7R	0.035" (0.88mm)	5895 Pcs	Active
C0805C392K1RAC7800	KEMET	3900 pF	100V	±10%	X7R	0.035" (0.88mm)	7494 Pcs	Active
CC0805JRX7R9BB392	YAGEO	3900 pF	50V	±5%	X7R	0.037" (0.95mm)	50138 Pcs	Active
CC0805KRX7R9BB392	YAGEO	3900 pF	50V	±10%	X7R	0.024" (0.60mm)	8520 Pcs	Active
KGM21NR71C392KT	KYOCERA AVX	3900 pF	16V	±10%	X7R	0.039" (1.00mm)	742 Pcs	Active
KGM21NR71E392KT	KYOCERA AVX	3900 pF	25V	±10%	X7R	0.039" (1.00mm)	9101 Pcs	Active
KGM21NR71H392JT	KYOCERA AVX	3900 pF	50V	±5%	X7R	0.039" (1.00mm)	1131 Pcs	Active
KGM21NR72A392KT	KYOCERA AVX	3900 pF	100V	±10%	X7R	0.039" (1.00mm)	22657 Pcs	Active
C0805C392J1GAC7800	KEMET	3900 pF	100V	±5%	C0G, NP0	0.035" (0.88mm)	6836 Pcs	Active
C0805C392J3GAC7800	KEMET	3900 pF	25V	±5%	C0G, NP0	0.043" (1.10mm)	5772 Pcs	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory conformance. Selection among substitutes depends on circuit voltage requirements and tolerance specifications:

For 10V circuits requiring X7R dielectric: KGM21NR71C392KT (16V rating) provides the closest voltage margin while maintaining X7R characteristics. This part offers ±10% tolerance with 742 pieces in inventory.

For circuits requiring higher voltage margin with X7R dielectric: KEMET C0805C392J5RAC7800 (50V) or YAGEO CC0805JRX7R9BB392 (50V) provide 5× voltage derating with ±5% tolerance. YAGEO variant has significantly higher inventory (50138 pieces).

For maximum voltage derating with X7R dielectric: KEMET C0805C392K1RAC7800 or KYOCERA AVX KGM21NR72A392KT both offer 100V rating with ±10% tolerance and substantial inventory levels (7494 and 22657 pieces respectively).

For applications requiring superior temperature stability: KEMET C0805C392J1GAC7800 (100V, C0G/NP0) or C0805C392J3GAC7800 (25V, C0G/NP0) provide C0G/NP0 temperature coefficient with ±5% tolerance and Low ESL characteristics. These are manufacturer-recommended alternatives.

All substitutes maintain identical 0805 package footprint, -55°C to 125°C operating temperature range, MSL 1 rating, and EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can I use a 50V or 100V rated capacitor in a 10V circuit?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage applications. The voltage rating indicates the maximum voltage the capacitor can withstand; operating at lower voltages provides design margin and improved reliability.

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

A: X7R dielectric exhibits ±15% capacitance change across the -55°C to 125°C temperature range. C0G/NP0 dielectric provides superior stability with minimal capacitance variation across temperature. C0G/NP0 is preferred for precision applications requiring stable capacitance values.

Q: Does tolerance affect substitutability?

A: Tolerance specifications define the acceptable capacitance range at 25°C. The original part specifies ±20%, while substitutes offer ±10% or ±5%. Tighter tolerance substitutes provide more precise capacitance values and are compatible with circuits designed for the original ±20% tolerance.

Q: Are all substitute parts in the same 0805 package?

A: Yes. All listed substitutes use 0805 (2012 Metric) surface mount package with identical footprint dimensions (0.079" L × 0.049" W). Thickness varies between 0.024" and 0.051" depending on manufacturer and voltage rating; verify PCB clearance for components with maximum thickness specifications.

Q: Which substitute offers the best inventory availability?

A: YAGEO CC0805JRX7R9BB392 has the highest inventory at 50138 pieces, offering 50V rating, ±5% tolerance, and X7R dielectric. KYOCERA AVX KGM21NR72A392KT provides 22657 pieces with 100V rating and ±10% tolerance.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and EAR99 ECCN classification, matching the regulatory status of the original 0805J0100392MXT.

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