1812HC122MAT1A Equivalent & Substitute Parts

Part Overview

The 1812HC122MAT1A is a 1200 pF ceramic capacitor rated for 3000V (3kV) with X7R temperature coefficient, manufactured by KYOCERA AVX in 1812 (4532 Metric) surface mount package. This high-voltage multilayer ceramic capacitor (MLCC) is designed for general-purpose applications requiring stable capacitance across a wide operating temperature range of -55°C to 125°C. The part is ROHS3 compliant with MSL 1 rating, indicating unlimited moisture sensitivity protection. Equivalent and substitute parts are identified when design requirements allow for tolerance variations, packaging format changes, or alternative manufacturers while maintaining core electrical and mechanical specifications.

Substiute Parts

1812HC122MAT1A\SB

KYOCERA AVXIn Stock: 12331812HC122MAT1A\SB Datasheet

Current PartRFQ

1812HC122KAT1A

KYOCERA AVXIn Stock: 7401812HC122KAT1A Datasheet

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1812HC122MAT1A

KYOCERA AVXIn Stock: 11351812HC122MAT1A Datasheet

Parametric EquivalentRFQ

C1812C122JHRAC7800

KEMETIn Stock: 1718C1812C122JHRAC7800 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1812HC122MAT1A is determined by the following critical parameters: capacitance value (1200 pF), voltage rating (3000V minimum), temperature coefficient (X7R), package form factor (1812/4532 Metric), and surface mount compatibility. All identified substitutes maintain these core specifications. Tolerance variations (±20%, ±10%, ±5%) are permitted when circuit design allows for capacitance drift within specified limits. Packaging format (bulk versus tape & reel) does not affect electrical performance. Dimensional variations within the 1812 package classification are acceptable provided they do not exceed the specified maximum thickness and footprint constraints. Compliance certifications (ROHS3, MSL 1, REACH Unaffected) are consistent across all substitutes.

Parameter Comparison

Engineering Selection Recommendations

Selection between 1812HC122MAT1A and its substitutes depends on tolerance requirements and dimensional constraints specific to the application circuit.

The 1812HC122KAT1A (KYOCERA AVX) offers improved tolerance (±10% versus ±20%) while maintaining identical voltage rating, temperature coefficient, and package dimensions. This substitute is suitable when tighter capacitance accuracy is required without changing supplier or package footprint.

The C1812C122JHRAC7800 (KEMET) provides the tightest tolerance specification (±5%) and features low ESL characteristics. This part has slightly reduced physical dimensions (0.177" length, 0.071" thickness) compared to the original specification. Selection of this substitute requires verification that the reduced footprint and thickness are compatible with PCB layout and assembly constraints. All three parts maintain active product status and full compliance with ROHS3 and MSL 1 requirements.

Frequently Asked Questions (FAQ)

Q: Can 1812HC122KAT1A replace 1812HC122MAT1A in existing designs? A: Yes. Both parts are manufactured by KYOCERA AVX with identical voltage rating (3000V), temperature coefficient (X7R), package form (1812/4532 Metric), and physical dimensions. The primary difference is tolerance: 1812HC122KAT1A provides ±10% tolerance versus ±20% for the original part. This substitution is direct if circuit design permits the improved tolerance specification.

Q: What are the dimensional differences between KYOCERA AVX and KEMET versions? A: The KEMET C1812C122JHRAC7800 has a slightly smaller footprint (0.177" L x 0.126" W versus 0.181" x 0.126") and reduced thickness (0.071" versus 0.087"). These differences remain within the 1812 package classification but require PCB layout verification to ensure compatibility with existing component placement and clearance requirements.

Q: Are all substitutes ROHS3 compliant? A: Yes. All three parts—1812HC122MAT1A, 1812HC122KAT1A, and C1812C122JHRAC7800—are ROHS3 compliant with MSL 1 rating and REACH Unaffected status.

Q: What tolerance should I select for my application? A: Tolerance selection depends on circuit performance requirements. The ±20% tolerance (1812HC122MAT1A) is suitable for general-purpose filtering and coupling applications. The ±10% tolerance (1812HC122KAT1A) provides improved accuracy for applications with tighter capacitance specifications. The ±5% tolerance (C1812C122JHRAC7800) is appropriate for precision circuits requiring minimal capacitance drift.

Q: Can I use tape & reel packaging instead of bulk packaging? A: Yes. Packaging format (tape & reel versus bulk) does not affect electrical performance or compatibility. Selection depends on assembly process requirements and inventory management practices.