08055U100FAT2A Equivalent & Substitute Parts

Part Overview

The 08055U100FAT2A is a 10 pF ceramic capacitor manufactured by KYOCERA AVX, rated for 50V operation with C0G/NP0 temperature coefficient in 0805 (2012 Metric) surface mount package. This component is designed for RF, microwave, and high-frequency applications requiring ultra-low ESR performance. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified to provide alternative sourcing options or enhanced voltage ratings while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	10 pF
Tolerance	±1%
Voltage Rating	50V
Temperature Coefficient	C0G, NP0
Operating Temperature Range	-55°C ~ 125°C
Package / Case	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC
Physical Dimensions	0.079" L x 0.049" W (2.01mm x 1.25mm)
Thickness (Max)	0.045" (1.15mm)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 08055U100FAT2A are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 10 pF (exact match required)
Tolerance: ±1% (exact match required)
Temperature Coefficient: C0G, NP0 (exact match required)
Package / Case: 0805 (2012 Metric) (exact match required)
Mounting Type: Surface Mount, MLCC (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Physical Dimensions: 0.079" L x 0.049" W / 2.01mm x 1.25mm (exact match required)
Thickness (Max): 0.045" (1.15mm) (exact match required)

Allowable Variation Parameters:

Voltage Rating: May be equal to or greater than 50V (uprating permitted)
Manufacturer: KYOCERA AVX (same manufacturer maintained)
Series: May differ (U series vs. KGQ series)
RoHS / REACH / MSL: Must maintain or exceed compliance level

The identified substitutes (KGQ21HCG2A100FT and KGQ21HCG2D100FT) meet all mandatory parameters while offering higher voltage ratings of 100V and 200V respectively, providing design flexibility for applications requiring enhanced voltage margin.

Parameter Comparison

Parameter	08055U100FAT2A	KGQ21HCG2A100FT	KGQ21HCG2D100FT
Manufacturer	KYOCERA AVX	KYOCERA AVX	KYOCERA AVX
Capacitance	10 pF	10 pF	10 pF
Tolerance	±1%	±1%	±1%
Voltage Rating	50V	100V	200V
Temperature Coefficient	C0G, NP0	C0G, NP0	C0G, NP0
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	0805 (2012 Metric)	0805 (2012 Metric)	0805 (2012 Metric)
Mounting Type	Surface Mount, MLCC	Surface Mount, MLCC	Surface Mount, MLCC
Physical Dimensions	0.079" L x 0.049" W (2.01mm x 1.25mm)	0.079" L x 0.049" W (2.01mm x 1.25mm)	0.079" L x 0.049" W (2.01mm x 1.25mm)
Thickness (Max)	0.045" (1.15mm)	0.045" (1.15mm)	0.045" (1.15mm)
Features	Ultra Low ESR	Ultra Low ESR	Ultra Low ESR
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts (08055U100FAT2A, KGQ21HCG2A100FT, and KGQ21HCG2D100FT) maintain active production status with ROHS3 compliance and REACH unaffected certification. Selection between these parts is determined by circuit voltage requirements:

08055U100FAT2A (50V): Use when circuit maximum voltage does not exceed 50V and cost optimization is prioritized.
KGQ21HCG2A100FT (100V): Use when circuit maximum voltage ranges from 51V to 100V, or when 2x voltage margin over 50V operation is required.
KGQ21HCG2D100FT (200V): Use when circuit maximum voltage ranges from 101V to 200V, or when maximum voltage derating margin is required.

All parts are electrically and mechanically interchangeable within their respective voltage ratings. No design modifications are required for PCB layout, assembly process, or thermal management when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can KGQ21HCG2A100FT or KGQ21HCG2D100FT be used as direct replacements for 08055U100FAT2A?

A: Yes. Both substitute parts are direct replacements from an electrical and mechanical standpoint. They share identical capacitance (10 pF), tolerance (±1%), temperature coefficient (C0G/NP0), package (0805), and physical dimensions. The higher voltage ratings (100V and 200V) are compatible with any circuit designed for 50V operation.

Q: What is the primary difference between these three parts?

A: The sole functional difference is the voltage rating. 08055U100FAT2A is rated 50V, KGQ21HCG2A100FT is rated 100V, and KGQ21HCG2D100FT is rated 200V. All other electrical and mechanical specifications are identical.

Q: Are there any PCB layout or assembly considerations when switching between these parts?

A: No. All three parts use the same 0805 (2012 Metric) package with identical physical dimensions (0.079" L x 0.049" W, 2.01mm x 1.25mm) and maximum thickness (0.045" / 1.15mm). PCB footprints, reflow profiles, and assembly processes remain unchanged.

Q: What does C0G/NP0 temperature coefficient mean for substitution purposes?

A: C0G and NP0 are equivalent designations for the same temperature coefficient characteristic, indicating minimal capacitance variation across the -55°C to 125°C operating range. All three parts share this specification, ensuring consistent performance across temperature extremes.

Q: Can a lower voltage-rated part substitute for a higher voltage requirement?

A: No. Voltage ratings establish the maximum safe operating voltage. A 50V-rated part cannot substitute for a 100V or 200V requirement. However, higher voltage-rated parts can substitute for lower voltage requirements.

Q: Are moisture sensitivity levels identical across all three parts?

A: Yes. All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.

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