1812HC681MAT3A Equivalent & Substitute Parts

Part Overview

The 1812HC681MAT3A is a high-voltage ceramic capacitor manufactured by KYOCERA AVX with a capacitance of 680 pF and rated voltage of 3000V (3kV). This surface-mount multilayer ceramic capacitor (MLCC) features X7R temperature coefficient characteristics and is housed in a 1812 (4532 Metric) package. The part is currently active in production with 817 units in stock. Finding equivalent or substitute parts may be necessary due to supply constraints, packaging preferences, or tolerance requirements in specific circuit applications.

Substiute Parts

1812HC681MAT3A\SB

KYOCERA AVXIn Stock: 8601812HC681MAT3A\SB Datasheet

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1812HC681KAT1A

KYOCERA AVXIn Stock: 28971812HC681KAT1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The 1812HC681KAT1A qualifies as a direct substitute for the 1812HC681MAT3A based on the following critical parameters:

• Identical Capacitance: Both parts are rated at 680 pF
• Identical Voltage Rating: Both are rated for 3000V (3kV)
• Identical Temperature Coefficient: Both feature X7R characteristics
• Identical Package: Both use 1812 (4532 Metric) surface-mount configuration
• Identical Physical Dimensions: Both measure 0.181" L x 0.126" W (4.60mm x 3.20mm) with 0.087" (2.20mm) thickness
• Identical Operating Temperature Range: Both operate from -55°C to 125°C
• Identical Compliance: Both are ROHS3 compliant with MSL 1 rating

The primary difference is the tolerance specification: the substitute part offers ±10% tolerance compared to the original ±20% tolerance, representing an upgrade in capacitance accuracy.

Parameter Comparison

Engineering Selection Recommendations

Both the 1812HC681MAT3A and 1812HC681KAT1A are active production parts from KYOCERA AVX with full ROHS3 compliance and identical electrical and mechanical specifications. The 1812HC681KAT1A provides tighter capacitance tolerance (±10% versus ±20%), which may be advantageous in applications requiring higher precision. The substitute part is available in Tape & Reel packaging, suitable for automated assembly processes. Selection between these parts should be based on tolerance requirements, packaging format compatibility with production equipment, and inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the 1812HC681KAT1A replace the 1812HC681MAT3A in existing designs?

A: Yes. Both parts share identical capacitance, voltage rating, temperature coefficient, package dimensions, and operating temperature range. The substitute offers improved tolerance specification.

Q: What is the difference between ±20% and ±10% tolerance?

A: Tolerance defines the acceptable deviation from the nominal 680 pF capacitance value. The ±20% specification allows values between 544 pF and 816 pF, while ±10% restricts values to between 612 pF and 748 pF. Applications requiring tighter capacitance control benefit from the ±10% tolerance.

Q: Are there packaging differences between these parts?

A: The main part uses standard packaging, while the substitute is supplied in Tape & Reel (TR) format. Both are surface-mount components in identical 1812 (4532 Metric) packages suitable for pick-and-place assembly.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which part should be selected for new designs?

A: The 1812HC681KAT1A is recommended for new designs due to its tighter tolerance specification and active production status with higher inventory availability (2825 units versus 817 units).