1812GC331KAT1A Equivalent & Substitute Parts

Part Overview

The 1812GC331KAT1A is a 330 pF ceramic capacitor manufactured by KYOCERA AVX with a rated voltage of 2000V (2kV) and X7R temperature coefficient. This surface mount multilayer ceramic capacitor (MLCC) in 1812 (4532 metric) package is designed for general purpose high voltage applications. The part is currently active in production with 752 units in stock inventory.

Substitute parts are identified when equivalent capacitance, tolerance, package dimensions, and mounting characteristics align with the original specification, while allowing for voltage rating upgrades or temperature coefficient variations that maintain or improve performance within the application's electrical requirements.

Key Parameters

Parameter	Value
Capacitance	330 pF
Tolerance	±10%
Voltage - Rated	2000V (2kV)
Temperature Coefficient	X7R
Operating Temperature Range	-55°C ~ 125°C
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 1812GC331KAT1A is determined by the following criteria:

Critical Parameters (Must Match):

Capacitance: 330 pF
Tolerance: ±10%
Package / Case: 1812 (4532 Metric)
Mounting Type: Surface Mount, MLCC
Operating Temperature Range: -55°C ~ 125°C

Allowable Variations:

Voltage - Rated: Equal to or greater than 2000V
Temperature Coefficient: X7R, C0G, or NP0 (all acceptable for general purpose applications)
Manufacturer: Different manufacturers permitted if all critical parameters align
Physical Dimensions: Minor variations within 1812 package specification tolerance

The identified substitute parts meet all critical parameters while offering voltage rating upgrades from 2000V to 3000V, which provides enhanced margin for high voltage applications without compromising compatibility.

Parameter Comparison

Parameter	1812GC331KAT1A (Main)	1812HA331KAT1A (Upgrade)	C4532C0G3F331K250KA (MFR Recommended)
Manufacturer	KYOCERA AVX	KYOCERA AVX	TDK Corporation
Capacitance	330 pF	330 pF	330 pF
Tolerance	±10%	±10%	±10%
Voltage - Rated	2000V (2kV)	3000V (3kV)	3000V (3kV)
Temperature Coefficient	X7R	C0G, NP0	C0G, NP0
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	1812 (4532 Metric)	1812 (4532 Metric)	1812 (4532 Metric)
Size / Dimension	0.181" L x 0.126" W (4.60mm x 3.20mm)	0.181" L x 0.126" W (4.60mm x 3.20mm)	0.177" L x 0.126" W (4.50mm x 3.20mm)
Thickness (Max)	0.071" (1.80mm)	0.087" (2.20mm)	0.110" (2.80mm)
Mounting Type	Surface Mount, MLCC	Surface Mount, MLCC	Surface Mount, MLCC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

1812GC331KAT1A (Original Part): Active production status with ROHS3 compliance and REACH unaffected certification. Suitable for applications requiring 2000V rated voltage with X7R temperature coefficient stability.

1812HA331KAT1A (KYOCERA AVX Upgrade): Active production status with identical manufacturer, ROHS3 compliance, and REACH unaffected certification. Provides 3000V voltage rating upgrade with C0G/NP0 temperature coefficient, offering improved voltage margin. Thickness increases to 2.20mm maximum. Inventory availability is significantly higher at 7109 units.

C4532C0G3F331K250KA (TDK Corporation MFR Recommended): Active production status with ROHS3 compliance and REACH unaffected certification. Provides 3000V voltage rating with C0G/NP0 temperature coefficient. Physical dimensions vary slightly (4.50mm length vs. 4.60mm) with maximum thickness of 2.80mm. Highest inventory availability at 17695 units.

All three parts maintain identical capacitance, tolerance, operating temperature range, and mounting characteristics. Selection between substitutes depends on voltage requirement, available board space for thickness variation, and manufacturer preference.

Frequently Asked Questions (FAQ)

Q: Can 1812HA331KAT1A replace 1812GC331KAT1A in all applications?

A: Yes, provided the application circuit can accommodate the increased thickness (2.20mm vs. 1.80mm). The 3000V rating provides additional voltage margin. The C0G/NP0 temperature coefficient offers superior stability compared to X7R across the operating temperature range.

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

A: X7R provides ±15% capacitance change across -55°C to 125°C. C0G/NP0 provides ±30 ppm/°C, resulting in minimal capacitance variation across temperature. C0G/NP0 is preferred for precision applications requiring stable capacitance over temperature.

Q: Are there physical compatibility concerns with C4532C0G3F331K250KA?

A: The TDK part has a slightly shorter length (4.50mm vs. 4.60mm) and greater thickness (2.80mm vs. 1.80mm). Verify PCB layout accommodates the increased height. The shorter length may provide additional clearance in length-constrained designs.

Q: Do all three parts have identical moisture sensitivity?

A: Yes. All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity precautions are required during storage or handling.

Q: Which substitute offers the best inventory availability?

A: C4532C0G3F331K250KA from TDK Corporation has the highest inventory at 17695 units, followed by 1812HA331KAT1A at 7109 units.

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