Equivalent & Substitute Parts for 1812AC221MAT1A

Part Overview

The 1812AC221MAT1A is a high-voltage ceramic capacitor manufactured by KYOCERA AVX with a capacitance of 220 pF, rated voltage of 1000V (1kV), and X7R temperature coefficient. This Surface Mount MLCC (Multilayer Ceramic Capacitor) in 1812 (4532 Metric) package is designed for general-purpose applications requiring high-voltage performance. The part is currently Active in product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Alternative equivalent and substitute parts may be required due to inventory availability, specific tolerance requirements, or enhanced voltage ratings for circuit design optimization.

Substiute Parts

1812AC221MAT1A\SB

KYOCERA AVXIn Stock: 8231812AC221MAT1A\SB Datasheet

Current PartRFQ

1812AA221KAT1A

KYOCERA AVXIn Stock: 69581812AA221KAT1A Datasheet

UpgradeRFQ

C4532C0G3F221K200KA

TDK CorporationIn Stock: 40033C4532C0G3F221K200KA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812AC221MAT1A is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 220 pF (exact match required)
• Package / Case: 1812 (4532 Metric) (exact match required)
• Mounting Type: Surface Mount, MLCC (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Allowable Variation Parameters:

• Tolerance: May be equal or tighter (±20% to ±10%)
• Voltage - Rated: May be equal or higher (1000V minimum)
• Temperature Coefficient: May differ (X7R, C0G/NP0 both acceptable for general-purpose applications)

The substitute parts listed below meet all mandatory matching criteria while offering improvements in tolerance specification and/or voltage rating.

Parameter Comparison

Engineering Selection Recommendations

1812AA221KAT1A (KYOCERA AVX Upgrade): This substitute offers tighter tolerance specification (±10% versus ±20%) while maintaining identical voltage rating and all other critical parameters. Both parts are Active products with ROHS3 compliance and MSL 1 rating. The primary advantage is improved capacitance accuracy. Thickness is reduced to 0.057" (1.45mm), which may provide PCB layout benefits in space-constrained designs.

C4532C0G3F221K200KA (TDK Corporation MFR Recommended): This substitute provides enhanced voltage rating of 3000V (3kV) compared to the 1000V (1kV) rating of the main part, with tighter tolerance (±10%). Both parts are Active products with ROHS3 compliance and MSL 1 rating. The increased voltage rating provides additional design margin for high-voltage circuit applications. Dimensional variation includes reduced length (0.177" versus 0.181") and increased thickness (0.087" versus 0.071"), which must be verified against PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can 1812AA221KAT1A be used as a direct replacement for 1812AC221MAT1A?

A: Yes. Both parts share identical capacitance (220 pF), voltage rating (1000V), package (1812), operating temperature range (-55°C ~ 125°C), and compliance certifications (ROHS3, MSL 1). The 1812AA221KAT1A offers improved tolerance (±10% versus ±20%), making it a compatible upgrade.

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

A: X7R provides ±15% capacitance change over the operating temperature range, while C0G/NP0 provides ±30 ppm/°C (approximately ±0.3% over the full range). Both are acceptable for general-purpose applications. C0G/NP0 offers superior temperature stability for precision circuits.

Q: Can C4532C0G3F221K200KA replace 1812AC221MAT1A in a 1000V circuit?

A: Yes. The C4532C0G3F221K200KA is rated for 3000V (3kV), which exceeds the 1000V requirement. All other critical parameters match: capacitance (220 pF), package (1812), operating temperature (-55°C ~ 125°C), and compliance (ROHS3, MSL 1). Verify PCB layout compatibility due to dimensional differences (length 0.177" versus 0.181", thickness 0.087" versus 0.071").

Q: Are there packaging differences between these substitutes?

A: The main part 1812AC221MAT1A does not specify packaging format. The 1812AA221KAT1A is supplied in Tape & Reel (TR) format. The C4532C0G3F221K200KA is supplied in Cut Tape (CT) & Digi-Reel® format. Confirm packaging requirements for your procurement and assembly processes.

Q: Do all three parts have the same moisture sensitivity rating?

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