UPJ1E390MDD

The UPJ1E390MDD is a miniature aluminum electrolytic capacitor from Nichicon’s UPJ series. It is a radial-lead, polarized capacitor providing 39 µF capacitance at a 25 V rating, designed for compact power and general-purpose electronic applications.

As part of the UPJ series, this capacitor features a low-impedance construction suited for switching power supplies and other circuits where stable decoupling and ripple handling are required. Key attributes include a wide operating temperature range from −55°C to 105°C and a rated endurance of 2000 hours at 105°C for this part.

Key Features

• Capacitance & Rated Voltage — 39 µF nominal capacitance with a 25 V rated voltage and ±20% tolerance, suitable for a variety of decoupling and smoothing roles.
• Low Impedance UPJ Series — Series-level characterization identifies this family as low impedance and intended for switching power supplies, aiding fast transient response.
• Temperature & Endurance — Operates from −55°C to 105°C with a specified life of 2000 hours at 105°C for this part number.
• Ripple Current Handling — Low-frequency ripple current of 51 mA at 120 Hz and high-frequency ripple current of 100 mA at 200 kHz, enabling effective filtering across frequency ranges.
• Loss Tangent & Leakage — Tangent of loss angle (tanδ) of 0.14 (measured at 20°C, 120 Hz) and leakage current specified at 29.25 µA for predictable dissipation and standby behavior.
• Compact Radial Package — Small can size φ5 × 11 mm (L: 1.1 × D: 0.5 cm) with 2.0 mm lead spacing (±0.5 mm) for space-constrained PCB layouts and through-hole assembly.
• Mounting & Packaging Options — Radial lead mounting simplifies prototyping and hand assembly; available in bulk (no terminal forming) or bag packing.
• RoHS Compliant — Meets RoHS requirements for reduced hazardous substances.

Typical Applications

• Switching Power Supplies — Low-impedance UPJ series construction and defined high-frequency ripple current capability make this capacitor suitable for smoothing and decoupling in switch-mode power stages.
• General-Purpose Power Filtering — 39 µF capacitance and 25 V rating support bulk filtering and supply stabilization in a wide range of electronic designs.
• Compact and Hand-Assembled Electronics — The miniature φ5 × 11 mm can and radial-lead format are helpful where board space is limited or through-hole assembly is preferred.

Unique Advantages

• Space-saving miniature package: φ5 × 11 mm can size delivers useful capacitance in a small footprint for dense PCB layouts.
• Designed for switching environments: UPJ series low-impedance design and documented ripple current ratings provide predictable performance in power conversion circuits.
• Wide operating temperature: −55°C to 105°C rating supports deployment across diverse thermal environments.
• Clear electrical characterization: Specified tanδ, leakage current, and ripple current values support accurate thermal and reliability budgeting in designs.
• Through-hole radial format: Simplifies prototype builds, rework, and field replacement compared with surface-mount-only parts.
• RoHS compliant: Facilitates designs that must meet environmental substance restrictions.

Why Choose UPJ1E390MDD?

UPJ1E390MDD offers a compact, well-characterized aluminum electrolytic solution for designers needing 39 µF at 25 V in a radial through-hole package. Its low-impedance UPJ series heritage, defined ripple current ratings, and measured tanδ and leakage figures make it straightforward to apply in switching power supplies and general-purpose power-filtering roles.

This part is suited to engineers and procurement teams specifying reliable, miniature electrolytic capacitors for compact or hand-assembled products that require wide temperature capability and predictable endurance at elevated temperature. The clear electrical specifications help reduce iteration during design verification and support reliable BOM decisions.

Request a quote or contact sales for pricing, availability, and lead-time information for UPJ1E390MDD.