UPJ1J390MED

The UPJ1J390MED is a radial-lead aluminum electrolytic capacitor from Nichicon’s UPJ series, designed as a low-impedance solution for power-conversion and general-purpose decoupling tasks. With a 39 µF capacitance at 63 V and a compact φ6.3 × 15 mm can, it targets compact switching power supplies and other space-constrained electronic power rails.

Key value drivers include low impedance characteristics (series-level), measured loss tangent (tanδ) at 20 °C / 120 Hz, measurable ripple-current capability across low and high frequencies, and RoHS compliance. Status: End Of Life.

Key Features

• Capacitance & Voltage — 39 µF nominal capacitance with a rated voltage of 63 V and tolerance ±20% (120 Hz, 20 °C).
• Low Impedance (Series) — UPJ series specification indicates low-impedance construction suitable for switching power supply applications.
• Loss Tangent (tanδ) — tanδ 0.08 measured at 20 °C, 120 Hz, supporting predictable ESR-related behavior in filtering applications.
• Ripple Current Capability — Low-frequency ripple current 96.9 mA at 120 Hz and high-frequency ripple current 190 mA at 200 kHz for smoothing and decoupling under dynamic load.
• Leakage Current — Measured leakage current 73.71 µA.
• Operating Temperature & Endurance — Rated for −55 °C to +105 °C with a life/endurance rating of 2000 hours at 105 °C (part-specific).
• Compact Radial Package — Can size φ6.3 × 15 mm with radial leads, lead spacing 2.5 mm ±0.5 mm; available in bulk (no terminal forming) or bag packing.
• RoHS Compliant — Conforms to RoHS directives as indicated in the series documentation.

Typical Applications

• Switching Power Supplies — Output smoothing and decoupling where low impedance and measurable ripple handling improve voltage stability.
• Industrial Control Electronics — Local bulk decoupling for power rails in compact control and automation modules operating across a wide temperature range.
• Consumer Power Modules — Compact radial can fits tight board layouts for power-supply filtering in consumer devices.

Unique Advantages

• Low-impedance design — Series-level low impedance helps minimize voltage ripple and improves performance in switching regulator outputs.
• Measurable ripple performance — Specified low- and high-frequency ripple currents (96.9 mA @120 Hz, 190 mA @200 kHz) enable designers to size bulk decoupling for real-world switching conditions.
• Compact radial can — φ6.3 × 15 mm package and 2.5 mm lead spacing save board area while allowing through-hole mounting.
• Wide operating temperature — −55 °C to +105 °C rating supports use across a broad range of environmental conditions.
• Predictable electrical characteristics — Specified tanδ (0.08) and leakage current (73.71 µA) provide quantifiable parameters for stability and loss budgeting.
• RoHS compliance — Environmentally compliant for designs requiring RoHS conformity.

Why Choose UPJ1J390MED?

UPJ1J390MED provides a compact, low-impedance electrolytic option for designers implementing power filtering and decoupling in space-constrained switching power supplies and general-purpose power rails. Its specified ripple-current performance, measurable tanδ, and rated operating range make it suitable for applications that need predictable smoothing behavior across a wide temperature range.

Although this part is currently End Of Life, its documented electrical characteristics and series-level low-impedance design provide clear reference points for replacement selection or design characterization when evaluating radial aluminum electrolytic options.

Request a quote or submit an inquiry for UPJ1J390MED to obtain pricing, availability details, and assistance in identifying suitable replacements or equivalent parts for your design needs.