UPJ1V390MED

The UPJ1V390MED is a miniature, radial-lead aluminum electrolytic capacitor from Nichicon's UPJ series designed for low-impedance power applications. As a polarized, high-reliability component with a 39 µF capacitance at 35 V, it is intended for general-purpose power filtering and smoothing in compact electronic assemblies, including switching power supplies where low impedance is required.

Key Features

• Electrical Performance — 39 µF capacitance at a rated voltage of 35 V with capacitance tolerance of -20%~20% (±20%); tangent of loss angle (tanδ) 0.12 measured at 20°C, 120 Hz.
• Ripple Current Ratings — Defined low-frequency ripple current of 71.4 mA (120 Hz) and high-frequency ripple current of 140 mA (200 kHz) to guide thermal and ripple-handling design.
• Leakage Current — Specified leakage current of 40.95 µA for predictable standby and bias behavior.
• Thermal and Endurance — Operating temperature range from -55°C to 105°C with a rated life/endurance of 2000 hours at 105°C.
• Compact Radial Package — Small can size φ6.3 × 11 mm with radial leads, lead spacing 2.5 mm (±0.5 mm), suitable for space-constrained PCB layouts.
• Polarized, Through-Hole Mounting — Radial lead configuration for straightforward through-hole assembly and prototyping.
• RoHS Compliance — Conforms to RoHS requirements for lead-free manufacturing processes.
• Packaging Options — Available in bulk (no terminal forming) and bag packing to support small-quantity prototyping and production handling.

Typical Applications

• Switching Power Supplies — Low-impedance UPJ series design makes the UPJ1V390MED suitable for output filtering and smoothing in compact switching regulators.
• DC–DC Converters — Provides decoupling and bulk capacitance for board-level converters where limited space and reliable ripple performance are required.
• General Purpose Power Filtering — Useful for power rail stabilization and transient suppression in industrial and consumer electronics modules.

Unique Advantages

• Compact footprint for space-limited designs — The φ6.3 × 11 mm can and 2.5 mm lead spacing enable installation in dense assemblies without compromising capacitance.
• Measured loss and leakage specifications — tanδ of 0.12 and a specified leakage current of 40.95 µA provide predictable AC and DC behavior for design validation.
• Defined ripple performance at LF and HF — Separate low-frequency and high-frequency ripple current ratings (71.4 mA and 140 mA) help size thermal margins and select appropriate placement on the PCB.
• Wide operating temperature range — Rated from -55°C to 105°C to support applications exposed to broad ambient conditions.
• RoHS compliant — Meets RoHS environmental requirements for lead-free assembly processes.

Why Choose UPJ1V390MED?

UPJ1V390MED combines a compact radial-can package with defined electrical characteristics—39 µF at 35 V, low tanδ, and specified ripple and leakage currents—making it a straightforward choice for engineers needing reliable power filtering in constrained layouts. Its -55°C to 105°C operating range and 2000-hour endurance rating at 105°C provide a clear reliability profile for designs exposed to elevated temperatures.

This part is well suited to engineers and procurement teams designing or supporting switching power supplies, DC–DC converters, and general-purpose power rails where space, measurable impedance, and predictable ripple performance are primary concerns.

Request a quote or submit an inquiry to confirm current availability, pricing, and lead times for UPJ1V390MED.