HJC (Huarong) MLCC

HJC MLCC dielectric types offer different characteristics: 1) C0G (NP0) - Class I ceramic with 0±30ppm/°C temperature coefficient, ultra-stable capacitance across temperature (-55°C to +125°C), low loss, ideal for precision timing, RF circuits, and filters

capacitance range typically 0.5pF to 47nF, 2) X7R - Class II ceramic with ±15% capacitance change over temperature (-55°C to +125°C), good for general-purpose decoupling and filtering

capacitance range 100pF to 47µF, 3) X5R - Class II ceramic with ±15% capacitance change over temperature (-55°C to +85°C), cost-effective for consumer electronics

capacitance range 1nF to 100µF. C0G is best for precision applications

X7R for general industrial/automotive

X5R for cost-sensitive consumer products.

Choose C0G for precision/R circuits; X7R for automotive/industrial; X5R for consumer electronics.

HJC MLCC part numbers follow the format: HJC-[Size]-[Voltage]-[Capacitance]-[Tolerance]-[Dielectric]. Example: HJC-0805-50V-104K-X7R decodes as: 0805 = Case size (2.0mm x 1.25mm), 50V = Voltage rating, 104 = Capacitance code (10 x 10^4 pF = 100nF), K = Tolerance (±10%), X7R = Dielectric type. Common case sizes: 0201 (0.6x0.3mm), 0402 (1.0x0.5mm), 0603 (1.6x0.8mm), 0805 (2.0x1.25mm), 1206 (3.2x1.6mm), 1210 (3.2x2.5mm). Tolerance codes: F (±1%), G (±2%), J (±5%), K (±10%), M (±20%). Understanding the part number system helps ensure correct component selection.

Use HJC's part number decoder tool or contact our sales team for assistance with part number interpretation.

DC bias effect is the capacitance reduction that occurs in Class II ceramic capacitors (X7R, X5R) when DC voltage is applied. The effect is caused by domain alignment in the ferroelectric ceramic material. Key characteristics: 1) Capacitance can drop 20-80% depending on voltage and dielectric thickness, 2) Higher voltage ratings show less capacitance loss at a given voltage, 3) Thinner dielectrics (smaller case sizes with high capacitance) show more severe DC bias, 4) C0G (NP0) dielectric does not exhibit DC bias effect. For example, a 10µF, 6.3V X5R capacitor may lose 60% of its capacitance at 5V DC. Design recommendations: 1) Select higher voltage rating than required, 2) Use larger case sizes for high capacitance values, 3) Consult HJC's DC bias curves in datasheets, 4) Consider C0G for critical timing circuits.

For applications with significant DC voltage, select MLCCs with higher voltage ratings or larger case sizes to minimize capacitance loss.

Yes, HJC offers extensive AEC-Q200 qualified MLCC portfolios for automotive applications. Automotive-grade features include: 1) X8R Dielectric - Stable performance up to 150°C for under-hood applications, 2) X7R Dielectric - Rated to 125°C for general automotive electronics, 3) Flexible Terminations - Soft termination technology to prevent cracking from board flexure, 4) Full AEC-Q200 Qualification - Including temperature cycling, mechanical shock, vibration, and humidity testing, 5) PPAP Documentation - Full production part approval process support, 6) Lot Traceability - Complete traceability for quality management. Applications include: EV powertrains, ADAS systems, battery management, LED lighting, and infotainment systems. HJC's IATF 16949 certification ensures automotive-grade quality management throughout the manufacturing process.

Select HJC automotive-grade MLCCs (X7R/X8R with AEC-Q200) for all automotive applications; specify flexible terminations for high-stress locations.

HJC MLCC case size selection depends on multiple factors: 1) Capacitance vs Voltage - Larger cases allow higher capacitance at same voltage or higher voltage at same capacitance, 2) Board Space - Smaller cases (0201, 0402) for space-constrained designs

larger cases (1206, 1210) for easier handling, 3) Current Capability - Larger cases have lower ESR and can handle higher ripple currents, 4) DC Bias Performance - Larger cases with thicker dielectrics show less capacitance loss under DC bias, 5) Manufacturing - Larger cases are easier to handle during assembly with lower placement defect rates. Common selections: 0201/0402 for smartphones/wearables, 0603/0805 for general electronics, 1206/1210 for power applications. Consider future availability - 0603 and 0805 are industry standards with best supply security.

Balance space constraints with electrical requirements; when in doubt, choose 0603 or 0805 for best availability and manufacturing yield.