UPW2E331MRD

The UPW2E331MRD is a radial-lead aluminum electrolytic capacitor in Nichicon's UPW series, offering 330 µF capacitance at a 250 V rating. Engineered for low impedance and reliable long-term operation, it targets power filtering and energy storage roles in demanding electronic systems.

This part is rated for operation from −40°C to 105°C with an endurance of 8000 hours at 105°C. The UPW2E331MRD is listed as End Of Life; review existing stock and lifecycle plans when specifying for new designs.

Key Features

• Capacitance & Voltage: 330 µF nominal capacitance with a 250 V rated voltage and a tolerance of −20% to +20%.
• Low loss at test conditions: tan δ (DF) = 0.15 measured at 20°C, 120 Hz, supporting effective filtering in power applications.
• Ripple current capability: Low-frequency ripple current 1.15 A at 120 Hz and high-frequency ripple current 1.323 A at 10 kHz, helping manage AC stress on the DC bus.
• Leakage current: Specified leakage current of 3400 µA.
• Long endurance: Rated life of 8000 hours at 105°C, suitable for sustained high-temperature operation.
• Package & mounting: Radial lead, polarized can (φ22 × 50 mm), lead spacing 10 mm (±0.5 mm); available in bulk or bag packing (no terminal forming).
• AEC-Q200 qualified: Designed and rated per AEC-Q200 requirements for applications requiring automotive-level component qualification.

Typical Applications

• Switching power supplies: Bulk smoothing and output filtering where low impedance and high ripple handling improve regulator stability and transient response.
• Automotive power electronics: Energy storage and decoupling in automotive modules, leveraging the AEC-Q200 rating and 8000 h endurance at 105°C.
• DC-DC converters and power filters: Input/output filtering and DC bus decoupling where 250 V rating and elevated ripple current capability are required.

Unique Advantages

• High voltage headroom: 250 V rating enables use in higher-voltage power rails and converter topologies.
• Balanced ripple performance: Distinct low- and high-frequency ripple current specifications (1.15 A at 120 Hz, 1.323 A at 10 kHz) support mixed-frequency filtering demands.
• Extended high-temperature life: 8000 hours at 105°C provides predictable longevity in thermal stress environments.
• Automotive-grade qualification: AEC-Q200 rating aligns the component with automotive design and reliability expectations.
• Through-hole robustness: Radial lead can package with defined lead spacing and secure mechanical mounting for vibration-prone assemblies.

Why Choose UPW2E331MRD?

The UPW2E331MRD combines a high 250 V rating, substantial 330 µF capacitance, and targeted ripple-current capability in a compact radial-can package. Its low-loss characteristic at 20°C/120 Hz and extensive 8000-hour endurance at 105°C make it well suited for power conversion and filtering tasks, especially where thermal durability and AEC-Q200 qualification matter.

This part is appropriate for engineers specifying components for switching power supplies and automotive power modules that require through-hole, polarized energy storage with defined ripple and leakage characteristics. Note the part is End Of Life—plan for lifecycle and supply considerations when integrating into new designs.

Request a quote or submit an RFQ to obtain current pricing and availability, and to discuss remaining stock and alternative recommendations for your design requirements.