Equivalent & Substitute Parts for 1808AC102MAT9A

Part Overview

The 1808AC102MAT9A is a 1000 pF ceramic capacitor rated at 1000V (1kV) with X7R temperature coefficient, manufactured by KYOCERA AVX in 1808 (4520 Metric) surface mount package. This high-voltage MLCC operates across -55°C to 125°C and is ROHS3 compliant with MSL 1 rating. The part is currently active in production with 683 units in stock. Substitute parts are identified when equivalent capacitance, voltage rating, temperature coefficient, and package dimensions are maintained while allowing variations in tolerance, voltage rating upgrades, or alternative packaging formats.

Key Parameters

Parameter	Value
Capacitance	1000 pF
Tolerance	±20%
Voltage Rating	1000V (1kV)
Temperature Coefficient	X7R
Package / Case	1808 (4520 Metric)
Mounting Type	Surface Mount, MLCC
Operating Temperature Range	-55°C to 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 1808AC102MAT9A is determined by the following criteria:

Primary Substitution Parameters:

Capacitance: 1000 pF (fixed, non-negotiable)
Temperature Coefficient: X7R (fixed, non-negotiable)
Package / Case: 1808 (4520 Metric) (fixed, non-negotiable)
Mounting Type: Surface Mount, MLCC (fixed, non-negotiable)
Operating Temperature Range: -55°C to 125°C (fixed, non-negotiable)

Allowable Variation Parameters:

Tolerance: ±20% or ±10% (tighter tolerance acceptable)
Voltage Rating: 1000V or higher (voltage derating acceptable for higher-rated parts)
Packaging Format: Cut Tape (CT), Digi-Reel®, or Tape & Reel (TR)
Manufacturer: KYOCERA AVX or equivalent qualified manufacturer

Substitute parts are grouped into two categories: Upgrade substitutes (improved tolerance or higher voltage rating) and Direct substitutes (equivalent electrical specifications from alternative manufacturers).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating	Temperature Coefficient	Package	Thickness (Max)	Product Status	Inventory
1808AC102MAT9A	KYOCERA AVX	1000 pF	±20%	1000V	X7R	1808	0.071" (1.80mm)	Active	683 Pcs
1808AC102KAT1A	KYOCERA AVX	1000 pF	±10%	1000V	X7R	1808	0.071" (1.80mm)	Active	2140 Pcs
1808GC102KAT1A	KYOCERA AVX	1000 pF	±10%	2000V	X7R	1808	0.071" (1.80mm)	Active	3294 Pcs
1808GC102MAT1A	KYOCERA AVX	1000 pF	±20%	2000V	X7R	1808	0.071" (1.80mm)	Active	6100 Pcs
1808HC102KAT1A	KYOCERA AVX	1000 pF	±10%	3000V	X7R	1808	0.087" (2.20mm)	Active	4597 Pcs
1808SC102KAT1A	KYOCERA AVX	1000 pF	±10%	1500V	X7R	1808	0.071" (1.80mm)	Active	5443 Pcs
1808WC102KAT1A	KYOCERA AVX	1000 pF	±10%	2500V	X7R	1808	0.087" (2.20mm)	Active	2200 Pcs
KGM42CR73D102KY	KYOCERA AVX	1000 pF	±10%	2000V	X7R	1808	0.087" (2.21mm)	Active	9025 Pcs
KGM42CR73D102MY	KYOCERA AVX	1000 pF	±20%	2000V	X7R	1808	0.087" (2.21mm)	Active	2833 Pcs
KGM42CR73U102KY	KYOCERA AVX	1000 pF	±10%	3000V	X7R	1808	0.087" (2.21mm)	Active	5700 Pcs
C4520X7R3A102M130KA	TDK Corporation	1000 pF	±20%	1000V	X7R	1808	0.059" (1.50mm)	Not For New Designs	1493 Pcs

Engineering Selection Recommendations

For Direct Electrical Equivalence (1000V, ±20% tolerance): 1808AC102KAT1A is the primary upgrade substitute, offering identical voltage and capacitance with improved ±10% tolerance while maintaining active product status and higher inventory availability (2140 units).

For Voltage Derating Applications (Higher Voltage Rating): Parts rated at 1500V, 2000V, 2500V, or 3000V are suitable when circuit design permits operation at reduced voltage stress. 1808GC102MAT1A (2000V, ±20%) and KGM42CR73D102MY (2000V, ±20%) maintain tolerance equivalence to the original part. 1808GC102KAT1A and KGM42CR73D102KY (both 2000V, ±10%) provide both voltage upgrade and tolerance improvement.

For Tolerance-Critical Applications: All ±10% tolerance variants (1808AC102KAT1A, 1808GC102KAT1A, 1808SC102KAT1A, 1808WC102KAT1A, KGM42CR73D102KY, KGM42CR73U102KY) are suitable when tighter capacitance tolerance is required.

For Alternative Manufacturer Requirement: C4520X7R3A102M130KA (TDK Corporation) provides electrical equivalence at 1000V with ±20% tolerance. This part carries "Not For New Designs" status and should be used only when KYOCERA AVX parts are unavailable. Thickness is reduced to 0.059" (1.50mm) compared to the original 0.071" (1.80mm).

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and -55°C to 125°C operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute? A: Yes. A capacitor rated at 1500V, 2000V, 2500V, or 3000V can replace the 1000V part in the same 1808 package, provided the circuit board layout and component placement accommodate any thickness variations. Higher voltage ratings do not affect capacitance value or temperature coefficient performance.

Q: What is the difference between ±20% and ±10% tolerance? A: Tolerance specifies the allowable deviation from the nominal 1000 pF capacitance value. ±20% allows 800–1200 pF; ±10% allows 900–1100 pF. Applications requiring tighter capacitance control should use ±10% parts. Both tolerances are acceptable for general-purpose high-voltage filtering.

Q: Are KYOCERA AVX and TDK Corporation parts interchangeable? A: Electrically, yes, when specifications match (1000 pF, 1000V, X7R, 1808 package). However, the TDK part (C4520X7R3A102M130KA) is marked "Not For New Designs," indicating end-of-life status. KYOCERA AVX equivalents are preferred for new designs.

Q: Does package format (Tape & Reel vs. Cut Tape) affect electrical performance? A: No. Packaging format affects only handling, storage, and assembly logistics. Electrical specifications remain identical regardless of whether the part is supplied in Tape & Reel (TR) or Cut Tape (CT) format.

Q: What is the significance of the KGM series designation? A: KGM parts are from the KYOCERA AVX KGM - HV (High Voltage) series. These parts maintain the same electrical specifications as standard 1808 parts but may have different internal construction optimized for high-voltage applications. They are fully compatible substitutes.

Q: Can I substitute a thicker part (0.087" vs. 0.071") on my PCB? A: Thickness variation must be evaluated against PCB design constraints. Parts rated 1500V and above (1808SC102KAT1A, 1808WC102KAT1A, 1808HC102KAT1A, KGM series) have increased thickness. Verify clearance with adjacent components and solder reflow profile compatibility before substitution.

Q: Is MSL 1 rating maintained across all substitutes? A: Yes. All listed substitute parts maintain MSL 1 (Unlimited) moisture sensitivity level, indicating no special moisture control is required during storage or assembly.

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