1812AC101MAT1A Equivalent & Substitute Parts

Part Overview

The 1812AC101MAT1A is a 100 pF, 1000V (1kV) ceramic capacitor manufactured by KYOCERA AVX with X7R temperature coefficient characteristics. This surface mount multilayer ceramic capacitor (MLCC) in 1812 (4532 Metric) package is designed for general purpose high voltage applications. The part is active and in production with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified based on identical capacitance, compatible package dimensions, and electrical parameter compatibility within the 1812 form factor.

Key Parameters

Parameter	Value
Capacitance	100 pF
Voltage Rating	1000V (1kV)
Temperature Coefficient	X7R
Tolerance	±20%
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 1812AC101MAT1A are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 100 pF (exact match required)
Package / Case: 1812 (4532 Metric) (physical and electrical compatibility)
Mounting Type: Surface Mount, MLCC
Operating Temperature Range: -55°C ~ 125°C (minimum)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Voltage Rating: Equal to or greater than 1000V
Temperature Coefficient: C0G/NP0 or X7R (both acceptable for general purpose applications)
Tolerance: ±5%, ±10%, or ±20% (tighter tolerances are acceptable upgrades)
Manufacturer: KYOCERA AVX or equivalent qualified manufacturers

Substitute parts maintain identical capacitance and package specifications while offering enhanced electrical characteristics such as higher voltage ratings, improved temperature stability (C0G/NP0), or tighter tolerance specifications.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Temperature Coefficient	Tolerance	Package	Thickness (Max)	RoHS Status	Inventory
1812AC101MAT1A	KYOCERA AVX	100 pF	1000V (1kV)	X7R	±20%	1812 (4532 Metric)	0.071" (1.80mm)	ROHS3 Compliant	632 Pcs
1812AA101KAT1A	KYOCERA AVX	100 pF	1000V (1kV)	C0G, NP0	±10%	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3 Compliant	5532 Pcs
1812GA101JAT1A	KYOCERA AVX	100 pF	2000V (2kV)	C0G, NP0	±5%	1812 (4532 Metric)	0.087" (2.20mm)	ROHS3 Compliant	9732 Pcs
1812WA101KAT1A	KYOCERA AVX	100 pF	2500V (2.5kV)	C0G, NP0	±10%	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3 Compliant	2553 Pcs
KGM43BCG3U101JV	KYOCERA AVX	100 pF	3000V (3kV)	C0G, NP0	±5%	1812 (4532 Metric)	0.057" (1.45mm)	ROHS3 Compliant	4720 Pcs
C4532C0G3F101K160KA	TDK Corporation	100 pF	3000V (3kV)	C0G, NP0	±10%	1812 (4532 Metric)	0.071" (1.80mm)	ROHS3 Compliant	33254 Pcs

Engineering Selection Recommendations

Selection of substitute parts for the 1812AC101MAT1A should be based on application voltage requirements and tolerance specifications:

Direct Replacement (Same Voltage Rating): The 1812AA101KAT1A provides equivalent 1000V performance with improved tolerance (±10% versus ±20%) and C0G/NP0 temperature coefficient, offering superior temperature stability while maintaining identical voltage rating and package compatibility.

Voltage Upgrade Applications: For circuits requiring higher voltage margins, the 1812GA101JAT1A (2kV), 1812WA101KAT1A (2.5kV), or KGM43BCG3U101JV (3kV) provide increased voltage headroom with C0G/NP0 temperature coefficient and tighter tolerance specifications. All maintain 1812 package compatibility and ROHS3 compliance.

Cross-Manufacturer Alternative: The C4532C0G3F101K160KA from TDK Corporation provides 3000V rating with C0G temperature coefficient and ±10% tolerance. This part maintains package compatibility and ROHS3 compliance, with significantly higher inventory availability (33254 Pcs).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and -55°C to 125°C operating temperature range, ensuring regulatory and environmental compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can 1812AA101KAT1A directly replace 1812AC101MAT1A in all applications? A: Yes, for applications operating at or below 1000V. The 1812AA101KAT1A maintains identical voltage rating and package dimensions while offering improved tolerance (±10% versus ±20%) and C0G/NP0 temperature coefficient for enhanced stability.

Q: What is the difference between X7R and C0G/NP0 temperature coefficients? A: X7R provides ±15% capacitance variation across -55°C to 125°C operating range. C0G/NP0 provides ±30 ppm/°C stability, resulting in minimal capacitance drift across temperature extremes. C0G/NP0 is preferred for precision applications.

Q: Are higher voltage rated parts (2kV, 2.5kV, 3kV) physically compatible with 1812AC101MAT1A footprints? A: Yes. All substitute parts use the 1812 (4532 Metric) package with identical length (0.181" / 4.60mm) and width (0.126" / 3.20mm). Thickness varies slightly (0.057" to 0.087"), but all are within standard PCB assembly tolerances for surface mount components.

Q: Why would I select a higher voltage rated capacitor if my circuit only requires 1kV? A: Higher voltage ratings provide design margin, improved reliability, and reduced failure rates in high stress environments. They also offer tighter tolerance specifications and superior temperature stability (C0G/NP0 versus X7R).

Q: Is the TDK C4532C0G3F101K160KA equivalent to KYOCERA AVX parts? A: Yes, for electrical and mechanical compatibility. The C4532C0G3F101K160KA maintains identical capacitance, voltage rating (3kV), package dimensions, and compliance certifications. Cross-manufacturer substitution is valid when package and electrical specifications match.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity? A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry MSL 1 rating, eliminating moisture-related compatibility concerns.

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