C1812F105K1RACTU Kemet Capacitor (Other) In Stock
Kemet C1812F105K1RACTU is a 1µF, 100V X7R MLCC capacitor in the 1812 SMD package with ±10% tolerance, open mode failure design, and temperature-stable dielectric for reliability-critical applications. Its 1812 footprint supports high capacitance at elevated voltages. Available in stock worldwide with fast shipping.
- Manufacturer
- Kemet
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- C1812F105K1RACTU Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 1µF capacitance at 100V rating in a compact 1812 SMD package — high voltage density for space-constrained power circuits
- Open mode failure design ensures the capacitor fails safely without shorting, critical for high-reliability and safety-certified systems
- X7R temperature-stable dielectric maintains capacitance within ±15% from -55°C to +125°C for consistent filter and decoupling performance
- ±10% tolerance (K grade) provides predictable performance in timing, filtering, and energy storage applications
Applications
The Kemet C1812F105K1RACTU is designed for high-reliability decoupling, bulk energy storage, and EMI filtering in industrial power supplies, automotive electronics, and safety-critical control systems operating at up to 100V. Its open mode failure characteristic makes it the preferred choice in medical devices, avionics power conditioning, and motor drive inverters where a shorted capacitor would be hazardous. The 1812 SMD package simplifies board layout for high-voltage filtering stages.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Why does the C1812F105K1RACTU use an open mode failure design rather than a standard MLCC construction?
The open mode failure design of the C1812F105K1RACTU ensures that if the capacitor fails due to overvoltage or mechanical stress, it opens the circuit rather than creating a short. This is essential in safety-critical systems — such as medical power supplies, 100V motor drives, and automotive ECUs — where a shorted capacitor could cause overcurrent damage or fire hazards.
How stable is the C1812F105K1RACTU capacitance across the operating temperature range?
The C1812F105K1RACTU uses an X7R dielectric rated from -55°C to +125°C, maintaining capacitance within ±15% of its 1µF nominal value across the full temperature span. This stability makes it reliable in automotive engine-bay electronics, industrial outdoor equipment, and power modules that experience wide thermal excursions during normal operation.
Which high-voltage filtering or decoupling applications are best served by the C1812F105K1RACTU?
With 1µF capacitance at a 100V rating, the C1812F105K1RACTU is well suited for bulk decoupling on 48V to 100V power rails, input EMI filtering for switching converters, and snubber capacitor networks in motor drives. Its 1812 SMD footprint provides adequate electrode area to maintain low ESR while handling the dielectric stress of high-voltage DC bias.
How does DC bias affect the effective capacitance of C1812F105K1RACTU in a 100V circuit?
Like most X7R MLCCs, the C1812F105K1RACTU experiences capacitance reduction under DC bias — at the full 100V rated voltage, effective capacitance may drop by 30% to 50% below the nominal 1µF value measured at low voltage. Designers should account for this derating by using the manufacturer's capacitance-vs-voltage curves when calculating actual filtering and decoupling margins in their circuits.
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