C1206C684K3RAC Kemet Capacitor (Capacitor Chip Non-polarised) In Stock
Kemet C1206C684K3RAC is a multilayer ceramic capacitor (MLCC) in 1206 SMD package with 0.68 µF capacitance, 25 V DC rating, X7R dielectric, and 10% tolerance, designed for decoupling, bypass, and filtering in automotive and industrial electronics.
- Manufacturer
- Kemet
- Package
- Capacitor Chip Non-polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- C1206C684K3RAC Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.68 µF capacitance with X7R dielectric for stable capacitance over -55°C to +125°C temperature range
- 25 V DC voltage rating suitable for 5 V to 12 V power supply decoupling
- 10% capacitance tolerance supporting standard bypass and filtering applications
- 1206 SMD package enabling reliable automated pick-and-place assembly
Applications
The C1206C684K3RAC is widely used for power supply decoupling and high-frequency bypass filtering on digital ICs, microcontrollers, and FPGAs operating from 3.3 V to 12 V rails. Its X7R dielectric ensures capacitance stability within ±15% across -55°C to +125°C, making it suitable for automotive ECUs, industrial sensor interfaces, and communication modules requiring reliable filtering in thermally demanding environments.
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
How does the X7R dielectric of the C1206C684K3RAC behave over temperature compared to Y5V for decoupling applications?
X7R dielectric in the C1206C684K3RAC maintains capacitance within ±15% across -55°C to +125°C, while Y5V can lose over 80% of its rated 0.68 µF value at temperature extremes. For automotive and industrial decoupling where temperature ranges exceed 85°C, X7R provides predictable bypass filtering performance that Y5V cannot reliably deliver.
At what effective capacitance does the C1206C684K3RAC operate when biased at its rated 25 V DC?
MLCC capacitance decreases under DC bias, and at 25 V (the full rated voltage), the C1206C684K3RAC may exhibit 20-40% capacitance reduction from its nominal 0.68 µF, yielding roughly 0.4 µF to 0.55 µF effective capacitance. Designers should derate to 50-70% of rated voltage (12 V to 17 V) to maintain close to the full 0.68 µF value in DC bias conditions.
For which power rail voltage ranges can the C1206C684K3RAC be safely used as a bulk bypass capacitor?
With a 25 V rating, the C1206C684K3RAC is suitable for decoupling on 3.3 V, 5 V, 12 V, and 15 V supply rails when derated to 80% (20 V maximum working voltage). For 24 V industrial supply rails, a 50 V-rated 0.68 µF MLCC in the same 1206 package would be required to maintain adequate derating margin.
How many C1206C684K3RAC capacitors are typically needed per IC power pin in a high-speed digital design?
High-speed digital ICs typically require 1 to 2 bulk bypass capacitors of 0.68 µF per power pin, combined with 100 nF high-frequency decoupling capacitors in parallel. In a 4-layer PCB design for a microcontroller running at 100 MHz, one C1206C684K3RAC per VCC pin placed within 2 mm of the supply pad effectively reduces power rail ripple below 50 mV.
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