UKL1E331MPD

The UKL1E331MPD from Nichicon is a radial-lead aluminum electrolytic capacitor offering 330 µF capacitance at a 25 V rating. It belongs to the UKL series, a low-leakage current family designed for compact through-hole power and signal applications.

With a φ10 × 20 mm can, 5 mm lead spacing and a -40 °C to 85 °C operating range, this part targets applications such as audio electronics that require moderate capacitance, controlled loss (tan δ), and defined ripple-handling capability. Note: this part is listed as End Of Life.

Key Features

• Capacitance & Voltage: 330 µF nominal capacitance with a rated voltage of 25 V and tolerance of -20% to +20%, suitable where moderate energy storage is required.
• Low Leakage & Loss: Low leakage current specified at 16.5 µA and a tangent of loss angle (tan δ) of 0.12 at 20 °C, 120 Hz, supporting minimal DC bleed and controlled dissipation.
• Ripple Current Performance: Rated low-frequency ripple current of 490 mA at 120 Hz and high-frequency ripple current of 735 mA at 10 kHz, enabling effective smoothing in supply and audio circuits.
• Endurance & Temperature Range: Life/endurance rated at 2000 hours at 85 °C with an operating temperature range of -40 °C to 85 °C, providing predictable behavior over the specified lifecycle.
• Package & Mounting: Radial lead, can-style package with dimensions φ10 × 20 mm and 5 mm lead spacing (±0.5 mm), suitable for through-hole PCB assembly and hand or wave soldering processes.
• Environmental Compliance & Packing: RoHS compliant; available in bulk (no terminal forming) or bag packing to support diverse assembly flows.
• Product Status: End Of Life — part is being phased out and is not recommended for new designs.

Typical Applications

• Audio electronics: Suitable for audio circuits where 330 µF at 25 V combined with low leakage and defined ripple handling supports smoothing, coupling/decoupling, and power filtering functions.

Unique Advantages

• Low leakage for stable DC performance: The specified 16.5 µA leakage current reduces unwanted DC bleed in bias and storage applications.
• Controlled dissipation (low tan δ): A tan δ of 0.12 at 20 °C, 120 Hz helps minimize loss-related heating in continuous-use circuits.
• Defined ripple-handling across frequencies: Rated ripple currents at both 120 Hz and 10 kHz provide data-driven selection for power-supply and audio-use cases.
• Compact, board-friendly footprint: The φ10 × 20 mm radial can with 5 mm lead spacing offers a small through-hole form factor for tight PCB layouts.
• Predictable lifecycle: 2000 hours endurance at 85 °C allows designers to plan for capacitor replacement or margin in thermal designs.
• RoHS compliance: Meets RoHS requirements for environmental and regulatory conformity in applicable markets.

Why Choose UKL1E331MPD?

UKL1E331MPD provides a balance of moderate capacitance, low leakage, and documented ripple performance in a compact radial-lead aluminum electrolytic package. Its defined tan δ and endurance rating enable engineers to specify predictable behavior in audio and related power-filtering applications.

This part is suited for legacy designs or repair/maintenance inventories where the specific combination of 330 µF at 25 V, low leakage, and radial through-hole packaging is required. Because the part is End Of Life, it is particularly relevant for sustaining existing products rather than new-design integrations.

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