UPA1E122MHD

The UPA1E122MHD is a radial-lead aluminum electrolytic capacitor in Nichicon’s UPA series, designed for compact, high-reliability power filtering in switching power supplies and general-purpose power applications. It pairs a miniature can package with low impedance and high allowable ripple current to support dense PCB layouts and robust power-rail decoupling.

Key value propositions include lower impedance than the UPW series, a small case footprint, long high-temperature endurance, and RoHS compliance for modern production requirements.

Key Features

• Capacitance & Voltage — 1.2 mF (1200 μF) nominal capacitance at a rated voltage of 25 V, suitable for power smoothing and decoupling on 25 V rails.
• Low Impedance — Rated impedance of 58 mΩ, providing lower AC voltage ripple and improved transient performance in power circuits.
• High Ripple Current — Rated ripple current of 1.607 A at 120 Hz and 1.89 A at 10 kHz to handle AC stress in switching supplies; frequency coefficients for 1200–10000 μF are provided in the series data (50 Hz: 0.80, 120 Hz: 0.85, 300 Hz: 0.90, 1 kHz: 0.95, 10 kHz+: 1.00).
• Long High-Temperature Life — Endurance specified up to 5000 hours at 105°C when stressed under rated conditions, supporting longer mean time between maintenance in demanding environments.
• Wide Operating Temperature Range — −55°C to +105°C category temperature range for broad environmental tolerance.
• Compact Radial Package — Radial can construction with 5 mm lead spacing and package dimensions L: 2.0 cm × D: 1.25 cm for space-constrained through-hole designs.
• Standard Tolerance & Polarity — Capacitance tolerance −20% to +20% and polarized construction for conventional electrolytic use.
• RoHS Compliant — Conforms to RoHS directives (2011/65/EU, (EU)2015/863) for regulated-material compliance.

Typical Applications

• Switching Power Supplies — Bulk and output filtering where low impedance and high ripple current capability reduce voltage ripple and improve regulator stability.
• DC–DC Converters — Input/output smoothing in point-of-load and intermediate bus converters for compact power modules.
• Telecom and Infrastructure Power Rails — Filtering and energy storage on 25 V rails in communication and network equipment.
• Consumer and Industrial Electronics — General-purpose power filtering for compact through-hole designs requiring robust temperature and ripple handling.

Unique Advantages

• Lower-Impedance Design: 58 mΩ impedance reduces AC ripple and improves transient response compared with higher-impedance alternatives.
• Compact Footprint: Small radial can (2.0 cm × 1.25 cm) and 5 mm lead spacing enable dense board layouts without sacrificing ripple capability.
• High Ripple Endurance: Rated ripple currents at 120 Hz and 10 kHz support switching and high-frequency applications with predictable thermal behavior.
• Extended High-Temperature Life: 5000 hours at 105°C endurance provides a defined reliability metric for designs targeting long service intervals.
• Broad Temperature Range: −55°C to +105°C operation allows use across a wide range of environmental conditions.
• RoHS Compliance: Meets current restricted-substance requirements to simplify regulatory compliance in production.

Why Choose UPA1E122MHD?

UPA1E122MHD delivers a compact, low-impedance solution for designers who need reliable bulk and decoupling capacitance on 25 V rails. Its combination of high allowable ripple current, a defined 5000-hour endurance at 105°C, and a wide −55°C to +105°C temperature range makes it suitable for demanding switching power and general-purpose power-filtering roles.

This part is a practical choice for engineers balancing board space, thermal stress, and ripple handling. Its radial-lead, can-style package and RoHS compliance make it straightforward to integrate into through-hole assemblies while meeting modern environmental regulations.

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