C2012X7R1H475K125AC
4.7µF multilayer ceramic capacitor in 0805 package, X7R dielectric, 50V rated voltage, ideal for decoupling and filte...
Product Overview
Description
The C2012X7R1H475K125AC is a high-capacitance multilayer ceramic capacitor featuring TDK's advanced X7R dielectric technology. This 4.7µF capacitor in a compact 0805 (2.0 x 1.25mm) package provides excellent capacitance density for space-constrained designs.
With a 50V DC rating and X7R temperature characteristics (-55°C to +125°C, ±15%), this capacitor is suitable for general-purpose decoupling, bypass, and filtering applications in consumer electronics, industrial equipment, and automotive systems.
The capacitor features a robust multilayer construction with nickel-barrier terminations, ensuring excellent solderability and long-term reliability. It is RoHS compliant and halogen-free, meeting environmental regulations for global markets.
Product Series
C
Primary Application
DC-DC converter input/output filtering
Key Features
- High capacitance density in compact 0805 package
- X7R dielectric for stable performance across temperature
- 50V rating suitable for 12V and 24V systems
- Nickel-barrier terminations for excellent solderability
- RoHS compliant and halogen-free
- Tape and reel packaging for automated assembly
Specifications
| Capacitance | 4.7µF ±10% |
|---|---|
| Rated Voltage | 50V DC |
| Dielectric | X7R |
| Package Size | 0805 (2.0 x 1.25mm) |
| Temperature Range | -55°C to +125°C |
| Temperature Coefficient | ±15% |
| ESR | 40mΩ max @ 100kHz |
| Ripple Current | 1.5A max |
Applications
DC-DC converter input/output filtering
Power conversion and supply
General decoupling and bypass applications
Electronic system design
Motor drive power supply filtering
Motor drive and control systems
LED driver circuits
Motor drive and control systems
Industrial control systems
Industrial automation and control
FAE Expert Insights
"The C2012X7R1H475K125AC is one of my go-to recommendations for general-purpose decoupling applications. In my experience supporting power supply designs, this capacitor offers an excellent balance of capacitance density, voltage rating, and cost. The X7R dielectric provides sufficient stability for most DC-DC converter applications, though I recommend designers account for DC bias effects - at 25V DC bias, expect approximately 40-50% capacitance retention. For critical filtering applications, I suggest paralleling with a smaller C0G capacitor to maintain impedance at high frequencies. The 0805 package offers good manufacturability while saving board space compared to larger alternatives."
Excellent value for decoupling applications with good capacitance density
— Michael Chen, BeiLuo
Frequently Asked Questions
What is the DC bias characteristic of this capacitor?
As an X7R ceramic capacitor, the C2012X7R1H475K125AC exhibits DC bias effects where capacitance decreases with applied DC voltage. At 50% of rated voltage (25V DC), expect approximately 40-50% capacitance retention. At 80% of rated voltage (40V DC), capacitance may drop to 20-30% of nominal value. This effect is more pronounced in smaller package sizes. TDK provides DC bias characteristic curves in the datasheet. For applications requiring stable capacitance under DC bias, consider using a larger package size or adding parallel capacitance margin.
For high DC bias applications, derate the capacitor or select a larger package size to ensure sufficient effective capacitance.
What is the recommended soldering profile for this MLCC?
TDK recommends standard lead-free reflow soldering profile per JEDEC J-STD-020. Peak temperature should not exceed 260°C for standard MLCCs. The recommended profile includes: preheat at 150-180°C for 60-120 seconds, ramp to peak at 1-3°C/second, peak temperature 245-260°C for 5-10 seconds, and cooling at less than 6°C/second. For hand soldering, use a temperature-controlled iron set to 350°C maximum with contact time limited to 3-5 seconds. Excessive heat or prolonged soldering can cause thermal shock and crack the ceramic body. Always follow TDK's application note for specific soldering recommendations.
Follow JEDEC J-STD-020 lead-free reflow profile and avoid exceeding 260°C peak temperature to prevent thermal damage.
Can this capacitor be used in automotive applications?
The C2012X7R1H475K125AC is a commercial-grade capacitor and is not qualified to AEC-Q200 standards. For automotive applications, TDK recommends using their CGA series automotive-grade MLCCs which are specifically designed and qualified for automotive use. The CGA series undergoes additional testing including temperature cycling, mechanical shock, and high-temperature operational life testing. Automotive-grade capacitors also feature enhanced manufacturing controls and traceability. If your application requires automotive qualification, please select from TDK's CGA series or contact our automotive FAE specialist for recommendations.
For automotive applications, select TDK CGA series AEC-Q200 qualified capacitors instead of commercial grade.
What is the expected lifetime of this capacitor?
MLCCs are generally considered to have unlimited lifetime when operated within their specified ratings. Unlike aluminum electrolytic capacitors, ceramic capacitors do not have a liquid electrolyte that can evaporate. The primary wear-out mechanism is dielectric degradation under high temperature and voltage stress. When operated at rated voltage and within the temperature range, X7R capacitors typically exhibit less than 1% capacitance change over 100,000 hours. For extended lifetime, apply voltage derating (operate at 70-80% of rated voltage) and ensure adequate cooling to keep the capacitor temperature below 85°C. TDK provides detailed reliability data in their product literature.
Apply voltage derating and thermal management for optimal long-term reliability in critical applications.
How does temperature affect the capacitance of this X7R capacitor?
X7R dielectric exhibits predictable temperature characteristics per EIA standards. The capacitance varies by ±15% across the rated temperature range of -55°C to +125°C. Maximum capacitance typically occurs near room temperature (20-25°C), with decreasing capacitance at both temperature extremes. At -55°C, capacitance may be 10-15% below nominal; at +125°C, capacitance may be 10-15% above nominal. This characteristic is reversible and does not is permanent degradation. For applications requiring tighter capacitance tolerance over temperature, consider using C0G (NP0) dielectric which has nearly zero temperature coefficient.
Account for ±15% capacitance variation in circuit design, or select C0G dielectric for applications requiring tighter temperature stability.