UCD1H391MNS1MS

The UCD1H391MNS1MS is a chip-type, low-impedance aluminum electrolytic capacitor designed for surface-mount assembly. It delivers 390 µF capacitance at a 50 V rating with a temperature range of −55°C to 105°C and is targeted at demanding automotive and industrial electronic power applications.

Built for automated PCB assembly and long-term operation, this SMD capacitor combines low-frequency and high-frequency ripple capability with a 5000-hour endurance at 105°C and AEC-Q200 qualification for automotive use.

Key Features

• Capacitance & Voltage — 390 µF nominal capacitance with a 50 V rated voltage and tolerance of −20% to +20% for predictable decoupling and smoothing performance.
• Low-Impedance Chip Type — Designed as a chip-type, low impedance capacitor for improved AC performance across power rails.
• Ripple Current Capability — Supports 450 mA low-frequency ripple at 120 Hz and 900 mA high-frequency ripple at 10 kHz to handle mixed-frequency power disturbances.
• High-Temperature Endurance — Rated for 5000 hours at 105°C, providing extended life under elevated operating temperatures.
• Wide Operating Temperature — Operates from −55°C to 105°C to support harsh environmental conditions.
• Electrical Loss — tan δ (DF) of 0.10 measured at 20°C, 120 Hz, supporting efficient energy storage with controlled dissipation.
• Leakage Current — Specified leakage current of 195 µA for predictable standby behavior.
• Surface Mount Packaging — Chip-style can SMD package (φ12.5 × 13.5L / size dimension L: 1.35 × D: 1.25 cm) supplied in embossed carrier taping for automatic pick-and-place.
• Reliability & Compliance — AEC-Q200 rated and RoHS compliant, with vibration resistant construction for robust deployment in automotive and industrial assemblies.

Typical Applications

• Automotive Electronic Modules — Bulk filtering and decoupling in control modules where AEC-Q200 qualification and wide temperature range are required.
• DC–DC Converters — Output smoothing and ripple suppression for converters operating up to 50 V.
• Power Supply Filtering — Bulk capacitance for board-level power rails in industrial and embedded systems exposed to thermal and vibrational stress.
• Infotainment and Body Electronics — Energy buffering and decoupling in assemblies that require surface-mount, automated placement and long endurance at elevated temperature.

Unique Advantages

• High Capacitance in SMD Form: 390 µF in a compact chip-type can provides significant bulk storage while supporting automated assembly.
• Dual-Frequency Ripple Handling: Rated ripple currents at both 120 Hz and 10 kHz accommodate mixed-frequency power disturbances without undetermined derating.
• Extended High-Temperature Life: 5000 hours at 105°C enables reliable long-term operation in elevated-temperature environments.
• Automotive-Grade Reliability: AEC-Q200 rating and vibration-resistant construction support deployment in automotive systems.
• Controlled Dissipation and Leakage: Low tan δ (0.10 at 20°C, 120 Hz) and specified leakage current (195 µA) simplify thermal and leakage budgeting for designs.
• Production-Ready Packaging: Embossed carrier taping and mass-production status streamline supply chain integration for high-volume manufacturing.

Why Choose UCD1H391MNS1MS?

The UCD1H391MNS1MS is positioned as a durable, production-ready SMD aluminum electrolytic capacitor offering substantial capacitance, low impedance behavior, and automotive-grade qualification. Its combination of 390 µF/50 V rating, dual-frequency ripple capability, long endurance at 105°C, and RoHS compliance makes it suitable for engineers designing robust power subsystems in automotive and industrial electronics.

This part is ideal for designers who require reliable bulk energy storage and ripple suppression in a surface-mount form factor that supports automated assembly and long-term operation under thermal and vibrational stress.

Request a quote or submit an inquiry to our sales team to discuss pricing, lead times, and sample availability for the UCD1H391MNS1MS.