UCS2E181MNY9

The UCS2E181MNY9 is a miniature, high-reliability aluminum electrolytic capacitor from Nichicon's UCS series. It is a radial-lead, polarized device rated at 250 V with 180 µF capacitance and ±20% tolerance, designed for demanding power applications that require high ripple handling and long operational life.

Engineered for power-supply and ballast use, this capacitor delivers high ripple current capability, extended endurance at elevated temperature, and a compact φ12.5×50 mm package suitable for through-hole assembly and general-purpose industrial electronics.

Key Features

• Capacitance & Voltage: 180 µF at 250 V, ±20% tolerance for bulk energy storage and smoothing in DC circuits.
• High ripple current capability: 1.035 A at 120 Hz (low frequency) and 2.07 A at 100 kHz (high frequency) to support heavy AC ripple and switching power topologies.
• Long endurance: Rated life of 10,000 hours at 105°C under applied DC bias plus rated ripple current for reliable long-term operation.
• Wide operating temperature: −40°C to +105°C, enabling use across a broad range of ambient conditions.
• Low loss: tan δ of 0.2 measured at 20°C and 120 Hz to limit heating and energy dissipation in the capacitor.
• Leakage current: Specified leakage of 1900 µA (measured after 1 minute at 20°C), for predictable bias behavior.
• Compact radial package: φ12.5×50 mm can with 5.0 mm lead spacing (±0.5 mm) and radial leads for secure through-hole mounting; available in bulk or bag packing.
• RoHS compliant: Compliant with RoHS requirements as noted in the product information.

Typical Applications

• Power supplies: Bulk filtering and smoothing in switch-mode and linear power supplies where high ripple handling and long life are required.
• Ballasts and lighting controls: Energy storage and ripple suppression in ballast circuits, matching the UCS series’ stated suitability for ballast applications.
• Industrial power electronics: Decoupling and energy buffering in industrial converters and control systems that operate across −40°C to +105°C.
• Hold-up and backup circuits: Temporary energy storage to maintain rails during transient conditions or brief power interruptions.

Unique Advantages

• Designed for high ripple environments: Specified ripple currents at both low and high frequencies reduce thermal stress and improve reliability in switching applications.
• Extended life at elevated temperature: 10,000-hour endurance at 105°C provides predictable longevity for continuous-duty installations.
• Compact footprint for through-hole designs: φ12.5×50 mm package with 5 mm lead spacing balances capacitance and voltage in a space-efficient radial can.
• Consistent electrical performance: Controlled tan δ and defined leakage current enable predictable thermal and leakage behavior under DC bias.
• Regulatory compliance: RoHS compliance supports deployment in regulated markets and assemblies.

Why Choose UCS2E181MNY9?

The UCS2E181MNY9 combines high capacitance at 250 V with substantial ripple-current capability and a 10,000-hour life at 105°C, making it a practical choice for designers who need reliable bulk energy storage and ripple suppression in power supplies, ballast circuits, and industrial electronics. Its compact radial can and defined electrical characteristics simplify component selection and board-level implementation for through-hole assemblies.

This part is well suited to engineers specifying capacitors for applications that demand predictable end-of-life performance, broad temperature operation, and RoHS compliance. Use it where sustained ripple handling and long-term endurance are key design priorities.

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