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1812HC331KAT3A Equivalent & Substitute Parts
Part Overview
The 1812HC331KAT3A is a 330 pF high-voltage ceramic capacitor manufactured by KYOCERA AVX with a rated voltage of 3000V (3kV) and X7R temperature coefficient. This surface-mount multilayer ceramic capacitor (MLCC) in 1812 (4532 metric) package is designed for general-purpose applications requiring high-voltage performance. The part is currently active and in stock with 878 units available. Alternative equivalent parts may be required due to inventory constraints, specific temperature coefficient requirements, or design optimization needs.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Capacitance | 330 pF |
| Tolerance | ±10% |
| Voltage Rating | 3000V (3kV) |
| Temperature Coefficient | X7R |
| Operating Temperature Range | -55°C ~ 125°C |
| Package / Case | 1812 (4532 Metric) |
| Mounting Type | Surface Mount, MLCC |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the 1812HC331KAT3A is determined by strict equivalence in the following electrical and mechanical parameters:
- Capacitance value: 330 pF
- Tolerance: ±10%
- Voltage rating: 3000V (3kV)
- Package: 1812 (4532 metric)
- Mounting type: Surface Mount, MLCC
- Operating temperature range: -55°C ~ 125°C
- RoHS and REACH compliance status
The primary difference among substitute parts is the temperature coefficient specification. The 1812HC331KAT3A uses X7R, while equivalent alternatives employ C0G/NP0 temperature coefficients. Both temperature coefficient types meet the specified operating temperature range and are suitable for general-purpose applications. Physical dimensions vary slightly among manufacturers while maintaining the same 1812 package classification.
Parameter Comparison
| Parameter | 1812HC331KAT3A (Main) | 1812HA331KAT1A (KYOCERA AVX) | C4532C0G3F331K250KA (TDK) |
|---|---|---|---|
| Manufacturer | KYOCERA AVX | KYOCERA AVX | TDK Corporation |
| Capacitance | 330 pF | 330 pF | 330 pF |
| Tolerance | ±10% | ±10% | ±10% |
| Voltage Rating | 3000V (3kV) | 3000V (3kV) | 3000V (3kV) |
| Temperature Coefficient | X7R | C0G, NP0 | C0G, NP0 |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Package / Case | 1812 (4532 Metric) | 1812 (4532 Metric) | 1812 (4532 Metric) |
| Mounting Type | Surface Mount, MLCC | Surface Mount, MLCC | Surface Mount, MLCC |
| Length | 0.181" (4.60mm) | 0.181" (4.60mm) | 0.177" (4.50mm) |
| Width | 0.126" (3.20mm) | 0.126" (3.20mm) | 0.126" (3.20mm) |
| Thickness (Max) | 0.071" (1.80mm) | 0.087" (2.20mm) | 0.110" (2.80mm) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected |
| Inventory Status | 878 Pcs In Stock | 7109 Pcs In Stock | 17695 Pcs In Stock |
Engineering Selection Recommendations
All three parts meet ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications. The 1812HA331KAT1A from KYOCERA AVX provides direct manufacturer continuity with improved inventory availability (7109 units) while maintaining identical electrical specifications and package dimensions. The C4532C0G3F331K250KA from TDK Corporation offers the highest inventory level (17695 units) and represents the manufacturer-recommended alternative, with the trade-off of increased thickness (2.80mm versus 1.80mm for the main part). Selection between these substitutes should be based on PCB layout constraints, inventory requirements, and temperature coefficient performance needs for the specific application.
Frequently Asked Questions (FAQ)
Q: Can the 1812HA331KAT1A directly replace the 1812HC331KAT3A?
A: Yes. Both parts share identical capacitance (330 pF), tolerance (±10%), voltage rating (3000V), package (1812), and operating temperature range (-55°C ~ 125°C). The primary difference is the temperature coefficient: X7R versus C0G/NP0. Both coefficients are suitable for general-purpose applications within the specified temperature range.
Q: What is the impact of different temperature coefficients?
A: X7R and C0G/NP0 temperature coefficients define capacitance variation across the operating temperature range. X7R exhibits ±15% capacitance change over -55°C to 125°C, while C0G/NP0 exhibits ±30 ppm/°C. For applications requiring stable capacitance across temperature extremes, C0G/NP0 provides superior stability.
Q: Are there physical compatibility concerns with the TDK C4532C0G3F331K250KA?
A: The TDK part has increased thickness (2.80mm maximum) compared to the main part (1.80mm maximum). Length and width remain compatible with the 1812 package specification. PCB layout and component clearance must accommodate the greater thickness.
Q: Do all substitute parts meet the same compliance standards?
A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.
Q: Which substitute should be selected for highest availability?
A: The C4532C0G3F331K250KA from TDK Corporation has the highest inventory level at 17695 units. The 1812HA331KAT1A from KYOCERA AVX provides the same manufacturer as the main part with 7109 units available.
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