As essential passive components, capacitors play a pivotal role in energy storage, voltage smoothing, and noise suppression across electronic systems. ROHM Semiconductor, leveraging advanced material and packaging technology, offers a comprehensive capacitor portfolio covering ceramic (MLCC), aluminum electrolytic, and film capacitors. These products deliver industry-leading stability, low power loss, and extreme environmental resilience—from automotive under-hood environments to high-frequency industrial circuits. To secure genuine products, stable inventory, and professional technical support, partnering with ROHM’s authorized distributors is critical. Below is a complete guide to sourcing ROHM capacitors via trusted channels.
Core Product Lines & Technical Advantages
ROHM’s capacitor lineup is tailored to diverse voltage, capacitance, and application needs, with three key series leading the market in performance for automotive, industrial, and consumer electronics:
1. Multilayer Ceramic Capacitors (MLCC)
Optimized for high-frequency, miniaturized circuits, these ceramic capacitors combine high capacitance density, low ESR, and automotive-grade reliability:
ECJ Series (General-Purpose MLCC): AEC-Q200 qualified, available in 0402 (1005) to 2220 (8880) package sizes, with capacitance range 1pF-10μF and voltage ratings 4V-500V. The ECJ1VB series (X5R/X7R dielectrics) offers stable capacitance across temperature (-55℃~85℃/125℃) and low ESR (≤50mΩ), making it ideal for automotive ECUs, consumer electronics power management, and industrial control circuits. Supports 10-year product longevity and RoHS compliance, ensuring stable supply for long-cycle projects.
High-Voltage MLCC (ECJ-HV Series): 100V-1000V high-voltage variants with X7R/X8R dielectrics, designed for industrial power supplies and 5G base station power modules. The compact SMD package reduces PCB space by 30% vs. conventional through-hole capacitors, while anti-vibration design enhances reliability in harsh industrial environments.
2. Aluminum Electrolytic Capacitors
Engineered for high capacitance and long life, these capacitors excel in voltage smoothing and energy storage for power-hungry applications:
EEE Series (Long-Life Automotive-Grade): AEC-Q200 qualified, with 105℃ rated temperature and 5000h+ service life (10x longer than standard products). The EEE-FK series (SMD type) offers capacitance 22μF-1000μF, voltage 16V-100V, and low ESR (≤100mΩ), suitable for automotive BMS, HV inverters, and industrial UPS systems. Through-hole variants (EEE-TA series) support 10000h life at 105℃, with anti-sulfuration and anti-vibration features for under-hood automotive applications.
Compact SMD Aluminum Electrolytic Capacitors (EEE-UD Series): 85℃ rated temperature, 2000h life, and ultra-thin package (height ≤2.5mm) for portable electronics and IoT modules. Capacitance range 10μF-100μF, voltage 6.3V-25V, with low leakage current (≤10μA) ensuring stable standby operation.
3. Film Capacitors (Polyester/Polypropylene)
Designed for high-voltage, low-loss applications, these capacitors feature excellent frequency stability and surge resistance:
ECQ Series (Polyester Film): 50V-630V voltage rating, capacitance 1nF-10μF, with ±5% capacitance tolerance and -40℃~125℃ operating range. Ideal for noise filters in industrial motor drives and automotive audio systems, with self-healing properties that reduce failure risks in harsh electrical environments.
ECW Series (Polypropylene Film): High-voltage variants (100V-1000V) with low dielectric loss (tanδ ≤0.001) and high insulation resistance (≥100GΩ). Suitable for power factor correction in industrial grids and high-frequency inverters, with through-hole and SMD packages for flexible integration.
Key Technological Advantages
Automotive-Grade Durability: AEC-Q200 qualification, anti-vibration (10G+), and anti-sulfuration design meet strict automotive environment requirements, ensuring reliability in under-hood and chassis-mounted applications.
Long Service Life: Advanced electrolyte and electrode materials enable 5000h+ life at 105℃ for aluminum electrolytic capacitors, 10x longer than standard products, reducing maintenance costs for industrial and automotive systems.
Low Power Loss: Optimized dielectric materials and electrode design achieve low ESR and low leakage current, enhancing energy efficiency in high-frequency power supplies and motor drive circuits.
Versatile Packaging: SMD (0402-2220) and through-hole packages support miniaturization, automated assembly, and high-power heat dissipation, adapting to diverse application scenarios.
