C1206C684K3RACTU Kemet Capacitor (Other) In Stock
C1206C684K3RACTU is a Kemet 0.68 µF Class II X7R MLCC in an 1206 SMD package rated at 25 V with ±10% capacitance tolerance. This temperature-stable multilayer ceramic capacitor is suitable for decoupling, bypass, and filtering in automotive and industrial electronics.
- Manufacturer
- Kemet
- Package
- Other
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- C1206C684K3RACTU Datasheet PDF
- Category
- Capacitor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 0.68 µF capacitance in compact 1206 SMD package for high-density PCB layouts
- X7R Class II dielectric providing stable capacitance from -55°C to +125°C
- 25 V voltage rating suitable for 5 V and 12 V rail decoupling applications
- ±10% tolerance meeting standard decoupling and filtering specifications
- AEC-Q200 qualified construction for automotive-grade reliability
Applications
C1206C684K3RACTU is used in power supply decoupling networks, EMI filter stages, and AC coupling paths in automotive ECUs, industrial motor drives, and communication equipment. Its X7R dielectric maintains capacitance within ±15% across the -55°C to +125°C operating range, ensuring stable filter performance over wide temperature swings. The 1206 package size allows hand soldering and automated reflow assembly for prototyping and production.
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 C1206C684K3RACTU perform across temperature in automotive systems?
The C1206C684K3RACTU uses an X7R Class II dielectric rated from -55°C to +125°C with a maximum capacitance change of ±15%. This stability is sufficient for automotive ECU decoupling and filter circuits, where temperature swings from -40°C cold crank conditions to +125°C underhood operation are common, ensuring consistent bypass performance without significant capacitance loss.
What voltage rating does C1206C684K3RACTU carry and which power rail levels does it support?
The C1206C684K3RACTU is rated at 25 V, making it suitable for decoupling 3.3 V, 5 V, and 12 V supply rails with substantial voltage derating margin. Applying a 2:1 derating rule keeps working voltage at or below 12.5 V, which is appropriate for most digital logic and analog front-end supply decoupling in industrial and automotive electronics.
How does C1206C684K3RACTU compare to a 0805 package alternative when space and current ripple are considered?
The 1206 package of C1206C684K3RACTU has a larger body of 3.2 mm × 1.6 mm compared to an 0805's 2.0 mm × 1.25 mm, offering lower equivalent series resistance (ESR) and higher rated power dissipation for ripple current handling in switching power supply output filters. When PCB space is not a constraint, the 1206 package provides improved thermal and electrical performance over smaller 0805 alternatives at 0.68 µF.
In which filtering applications does the 0.68 µF value of C1206C684K3RACTU deliver best performance?
A 0.68 µF capacitor is effective for mid-frequency decoupling between 100 kHz and 10 MHz when used alongside a 100 nF capacitor in a two-capacitor bypass network. In LC filter stages, 0.68 µF paired with a 10 µH inductor creates a low-pass corner frequency near 60 kHz, useful for attenuating switching noise from 100 kHz to 1 MHz DC-DC converters in sensor power supplies.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About Kemet
Kemet is a leading electronic component manufacturer. FindMyChip sources Kemet ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“We've been using FindMyChip for 2 years. Pricing is consistently 20-30% below Mouser/DigiKey for volume orders.”