UCX1H391MNJ1MS

The UCX1H391MNJ1MS is a chip-type aluminum electrolytic capacitor designed for high-temperature operation up to +135°C. It delivers 390 µF at 50 V in a compact surface-mount can package suitable for automated assembly from carrier tape.

Targeted at demanding power and control electronics, this capacitor offers AEC-Q200 qualification, a defined low-temperature ESR performance, and endurance proven for high-temperature service — making it appropriate for applications that require stability under thermal stress and reliable power decoupling.

Key Features

• Capacitance & Voltage: 390 µF rated capacitance at 50 V with ±20% tolerance (measured at 120 Hz, 20°C), providing bulk energy storage and decoupling in compact assemblies.
• High Temperature Range: Rated for operation from −40°C to +135°C with endurance specified as 2000 hours at 135°C, supporting long-term operation in hot environments.
• Low-Temperature ESR Specification: ESR specified after the −40°C test and defined as 90 mΩ at 100 kHz, supporting stable high-frequency performance across temperature extremes.
• Ripple Current Capability: Rated ripple currents of 375 mA at 120 Hz and 750 mA at 10 kHz to handle AC stress and ripple in power circuits.
• Package & Mounting: Surface-mount radial can (SMD) format designed for automatic mounting by carrier tape; compact footprint with dimensions L: 1.35 × D: 1.25 cm and recommended land size L: 1.28 × W: 1.28 cm.
• Reliability & Compliance: AEC-Q200 qualified and RoHS compliant, delivering traceable quality for regulated applications.

Typical Applications

• Automotive power electronics: Bulk smoothing and decoupling in modules where AEC-Q200 qualification and sustained +135°C endurance are required.
• Industrial controls and power modules: Energy storage and ripple handling in high-temperature control environments and power conversion systems.
• Compact embedded power supplies: Space-constrained surface-mount designs that need high capacitance and automated assembly compatibility.

Unique Advantages

• High-temperature endurance: 2000 hours at 135°C specification supports reliable long-term operation in thermally demanding environments.
• Automotive-grade qualification: AEC-Q200 rating provides an added level of design confidence for transportation and similarly rigorous applications.
• Defined low-temperature ESR: ESR specified after −40°C testing and 90 mΩ at 100 kHz helps maintain performance across a wide temperature range.
• Surface-mount, tape-fed package: Designed for automated assembly to simplify BOM integration and improve manufacturing throughput.
• Measured ripple performance: Rated ripple currents at both low and high frequencies enable reliable handling of AC stress in power circuits.
• RoHS compliant: Meets regulatory requirements for lead-free assemblies.

Why Choose UCX1H391MNJ1MS?

The UCX1H391MNJ1MS combines high capacitance density with a compact surface-mount can and validated performance at elevated temperatures. Its AEC-Q200 qualification, defined low-temperature ESR behavior, and 2000-hour endurance at 135°C make it a strong choice for designs where thermal robustness and long-term stability are critical.

Ideal for engineers specifying capacitors for automotive power electronics, industrial control systems, or compact embedded supplies, this part provides clear, verifiable specifications for integration into designs that demand dependable performance under thermal stress.

Request a quote or submit your specifications to our sales team to evaluate UCX1H391MNJ1MS for your next high-temperature, high-reliability design.