1812AC103KA1ME Ceramic Capacitor - Equivalent & Substitute Parts

Part Overview

The 1812AC103KA1ME is a 10000 pF (10 nF) ceramic capacitor rated for 1000V (1kV) 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 the operating temperature range of -55°C to 125°C. The part is currently active in production with 973 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, temperature coefficient) and mechanical compatibility (package size, mounting type, physical dimensions).

Key Parameters

Parameter	Specification
Capacitance	10000 pF (10 nF)
Tolerance	±10%
Voltage Rating	1000V (1kV)
Temperature Coefficient	X7R
Operating Temperature Range	-55°C to 125°C
Package / Case	1812 (4532 Metric)
Mounting Type	Surface Mount, MLCC
Physical Dimensions	0.181" L × 0.126" W (4.60mm × 3.20mm)
Thickness	0.087" (2.20mm) maximum
Moisture Sensitivity Level	MSL 1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 1812AC103KA1ME are classified based on electrical and mechanical parameter matching:

Parametric Equivalents - Parts with identical electrical specifications (10000 pF, ±10%, 1000V, X7R) and package dimensions (1812/4532 Metric), differing only in packaging format or RoHS compliance status:

1812AC103KAT1A (KYOCERA AVX) - Tape & Reel packaging, ROHS3 compliant
KGM43FR73A103KV (KYOCERA AVX, KGM - HV series) - Tape & Reel packaging, ROHS3 compliant

Direct Manufacturer Equivalents - Parts from alternative manufacturers meeting all electrical and mechanical specifications:

C1812C103KDRAC7800 (KEMET, SMD Comm X7R HV series) - Low ESL feature, slightly reduced thickness (1.55mm)
C4532X7R3A103K200KA (TDK Corporation, C series) - Identical specifications and dimensions
HC1812XR103K102 (Meritek, HC series) - Reduced thickness (1.80mm)

Manufacturer Recommended Alternative - Part with modified temperature coefficient (X7S instead of X7R) but identical other electrical parameters:

C4532X7S3A103K160KA (TDK Corporation, C series) - X7S temperature coefficient, reduced thickness (1.80mm)

Substitution is valid when the application permits the specified parameter variations. All listed parts maintain the same capacitance value, voltage rating, tolerance, package footprint, and mounting type.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	Temperature Coefficient	Package	Dimensions (L × W)	Thickness (Max)	RoHS Status	Inventory
1812AC103KA1ME	KYOCERA AVX	10000 pF	1000V	±10%	X7R	1812 (4532)	0.181" × 0.126" (4.60mm × 3.20mm)	0.087" (2.20mm)	Non-compliant	973 Pcs
1812AC103KAT1A	KYOCERA AVX	10000 pF	1000V	±10%	X7R	1812 (4532)	0.181" × 0.126" (4.60mm × 3.20mm)	0.087" (2.20mm)	ROHS3 Compliant	2540 Pcs
KGM43FR73A103KV	KYOCERA AVX	10000 pF	1000V	±10%	X7R	1812 (4532)	0.181" × 0.126" (4.60mm × 3.20mm)	0.087" (2.21mm)	ROHS3 Compliant	9074 Pcs
C1812C103KDRAC7800	KEMET	10000 pF	1000V	±10%	X7R	1812 (4532)	0.177" × 0.126" (4.50mm × 3.20mm)	0.061" (1.55mm)	ROHS3 Compliant	12273 Pcs
C4532X7R3A103K200KA	TDK Corporation	10000 pF	1000V	±10%	X7R	1812 (4532)	0.177" × 0.126" (4.50mm × 3.20mm)	0.087" (2.20mm)	ROHS3 Compliant	86839 Pcs
HC1812XR103K102	Meritek	10000 pF	1000V	±10%	X7R	1812 (4532)	0.180" × 0.125" (4.60mm × 3.20mm)	0.071" (1.80mm)	ROHS3 Compliant	72049 Pcs
C4532X7S3A103K160KA	TDK Corporation	10000 pF	1000V	±10%	X7S	1812 (4532)	0.177" × 0.126" (4.50mm × 3.20mm)	0.071" (1.80mm)	ROHS3 Compliant	1302 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

1812AC103KAT1A is the primary equivalent from KYOCERA AVX, offering ROHS3 compliance and higher inventory availability (2540 units).
KGM43FR73A103KV from KYOCERA AVX (KGM - HV series) provides the highest inventory level (9074 units) with ROHS3 compliance and negligible thickness variation (0.21mm difference).
C4532X7R3A103K200KA from TDK Corporation offers the largest inventory (86839 units) with identical electrical specifications and ROHS3 compliance.

For Space-Constrained Applications:

C1812C103KDRAC7800 (KEMET) provides the lowest profile (1.55mm thickness) with Low ESL characteristics and ROHS3 compliance.
HC1812XR103K102 (Meritek) offers reduced thickness (1.80mm) with ROHS3 compliance.

For Temperature Coefficient Flexibility:

C4532X7S3A103K160KA (TDK Corporation) substitutes X7S temperature coefficient for X7R. X7S provides tighter capacitance stability over temperature (-55°C to 125°C) compared to X7R, suitable for applications requiring enhanced temperature performance. This part is ROHS3 compliant with reduced thickness (1.80mm).

Compliance Considerations: All substitute parts listed are ROHS3 compliant except the original 1812AC103KA1ME. For applications requiring RoHS compliance, any of the listed substitutes are suitable. The original part is RoHS non-compliant and REACH Affected; all substitutes are REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can I use 1812AC103KAT1A as a direct replacement for 1812AC103KA1ME? A: Yes. Both parts are manufactured by KYOCERA AVX with identical electrical specifications (10000 pF, ±10%, 1000V, X7R) and package dimensions (1812/4532 Metric). The primary difference is packaging format (Tape & Reel vs. bulk) and RoHS compliance status. 1812AC103KAT1A is ROHS3 compliant.

Q: What is the difference between X7R and X7S temperature coefficients? A: Both X7R and X7S are Class II ceramic dielectrics with operating range -55°C to 125°C. X7R provides ±15% capacitance change over temperature, while X7S provides ±22% change. X7S offers tighter stability in this application. Selection depends on circuit requirements for capacitance tolerance across temperature extremes.

Q: Are there physical compatibility concerns with substitutes from different manufacturers? A: All listed substitutes use the 1812 (4532 Metric) package with compatible footprints. Minor dimensional variations exist: length ranges from 0.177" to 0.181", width from 0.125" to 0.126", and thickness from 0.061" to 0.087". These variations are within standard PCB design tolerances for 1812 package placement. Verify PCB layout clearances if space is constrained.

Q: Which substitute offers the best availability? A: C4532X7R3A103K200KA from TDK Corporation has the highest inventory level at 86839 units, followed by HC1812XR103K102 (Meritek) at 72049 units. Both are ROHS3 compliant with identical electrical specifications to the original part.

Q: Can I substitute C4532X7S3A103K160KA if my application originally specified X7R? A: Only if your circuit design permits the different temperature coefficient. X7S provides tighter capacitance stability over temperature but with a wider tolerance band (±22% vs. ±15% for X7R). Consult circuit requirements and perform validation testing if temperature performance is critical.

Q: What is the significance of Low ESL in the KEMET part? A: Low ESL (Equivalent Series Inductance) in C1812C103KDRAC7800 reduces high-frequency impedance, beneficial for high-frequency filtering and decoupling applications. This feature does not affect DC or low-frequency performance. Select this part if your application operates at frequencies where ESL becomes a design factor.

Q: Are all substitutes suitable for high-voltage applications? A: Yes. All listed parts are rated for 1000V (1kV) with High Voltage features. They are suitable for the same high-voltage application class as the original 1812AC103KA1ME.

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