UPW2A391MHD

The UPW2A391MHD is a miniature, high-reliability aluminum electrolytic capacitor in a radial lead can designed for demanding power applications. It provides 390 μF capacitance at a 100 V rating and is optimized for switching power supplies and other circuits requiring stable capacitance and high ripple-current capability.

With a wide operating temperature range and long endurance at elevated temperature, this capacitor targets applications where durability, low impedance, and compact size are required.

Key Features

• Capacitance and Voltage — 390 μF nominal capacitance with a 100 V rated voltage and a tolerance of -20% to +20% for predictable energy storage and bulk decoupling.
• Low Impedance — Specified impedance of 166 mΩ supports lower voltage drop under load, aiding stability in power delivery.
• High Ripple Current Capability — Low-frequency ripple current of 945 mA (120 Hz) and high-frequency ripple current of 1.26 A (10 kHz) to handle both power-line and switching-frequency ripple requirements.
• Reliability & Endurance — Rated for 8,000 hours at 105°C, providing long service life under elevated temperature stress.
• Temperature Range — Wide operating temperature range from -55°C to +105°C for use across harsh environments.
• Electrical Loss — tan δ of 0.08 (measured at 20°C, 120 Hz) to characterize dissipation performance for design trade-offs.
• Leakage Current — Specified leakage current of 1,170 μA, useful for sizing bleeder paths and startup behavior.
• Package & Mounting — Radial lead can, size φ18 × 25 mm length, lead spacing 7.5 mm (±0.5 mm), available in bulk or bag packing for through-hole assembly.
• Standards — AEC-Q200 listed rating for applications that require machine-grade reliability verification.

Typical Applications

• Switching Power Supplies — Bulk decoupling and output filtering where low impedance and high ripple-current capability improve voltage stability.
• Automotive Electronics — Suitable for automotive electronic modules that benefit from AEC-Q200 qualification and wide temperature operation.
• Industrial Power Systems — Energy storage and smoothing in industrial converters and control systems exposed to elevated temperatures.

Unique Advantages

• Compact, high-capacitance solution: 390 μF in a φ18 × 25 mm package saves board space while delivering significant energy storage.
• Designed for switching environments: High ripple-current ratings at both low and high frequencies support switching regulator input/output filtering.
• Durability at elevated temperature: 8,000 hours endurance at 105°C supports long-term operation in hot compartments or tightly packed assemblies.
• Predictable electrical behavior: Specified impedance, tan δ, and leakage current make it straightforward to model and integrate into power designs.
• Automotive-grade qualification: AEC-Q200 listing provides an added level of process and reliability assurance for vehicle electronics and related applications.

Why Choose UPW2A391MHD?

UPW2A391MHD combines a high working voltage (100 V) and substantial capacitance (390 μF) in a compact radial lead can, delivering reliable bulk energy storage and filtering where space is limited. Its low impedance, defined ripple-current performance across frequencies, and measured losses (tan δ) make it suitable for designers optimizing power-stage stability and thermal budget.

The capacitor’s extended temperature range (−55°C to +105°C) and 8,000-hour endurance at 105°C make it a strong choice for applications that demand long-term robustness under thermal stress, including automotive and industrial power electronics. Engineers seeking predictable, qualified electrolytic performance will find UPW2A391MHD a practical option for high-reliability designs.

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