RNU1V121MDNASQ

The RNU1V121MDNASQ is a conductive polymer aluminum solid electrolytic capacitor in a radial lead can, specified at 120 µF and 35 V. Designed for general-purpose electronic applications, it combines high capacitance with low ESR and high ripple-current capability to support demanding power-decoupling and energy-storage roles.

Packaged in a φ10×12.5 mm can with 5.0 mm lead spacing, this component offers a wide operating temperature range (−55°C to 105°C) and a rated endurance of 5000 hours at 105°C for reliable long-term operation.

Key Features

• Electrical performance  120 µF capacitance at 35 V rated voltage with a tolerance of −20% to +20% and tanδ of 0.12 (measured at 20°C, 120 Hz).
• Low ESR  Equivalent series resistance of 18 mΩ measured at 20°C/100 kHz, supporting low-loss operation in high-frequency environments.
• High ripple-current capability  Rated ripple current of 440 mA at 120 Hz (low frequency) and 4.4 A at 300 kHz (high frequency), enabling effective ripple handling across a wide frequency range.
• Leakage and reliability  Leakage current specified at 840 µA (after 2 minutes at 20°C), and a load life/endurance rating of 5000 hours at 105°C under rated voltage.
• Robust temperature range  Operational from −55°C to 105°C to accommodate varied environmental conditions.
• Radial lead package  φ10×12.5 mm can with 5.0 mm lead spacing (±0.5 mm) available in bulk/bag packing for through-hole assembly.
• RoHS compliant  Manufactured in accordance with RoHS directive requirements.

Typical Applications

• Power supply decoupling  Use where high capacitance and low ESR are needed to stabilize voltage rails and reduce ripple on DC supplies.
• Switching power converters  Suitable for smoothing and energy buffering in switching regulators thanks to high ripple-current capability at both low and high frequencies.
• Embedded and consumer electronics  General-purpose decoupling and bulk storage for compact, radial-leaded through-hole designs.

Unique Advantages

• Low-loss operation: 18 mΩ ESR at 100 kHz reduces heat generation and improves efficiency in high-frequency circuits.
• High-frequency ripple handling: Rated for up to 4.4 A at 300 kHz, enabling reliable performance in modern switching applications.
• Extended high-temperature endurance: 5000-hour life rating at 105°C supports long-term reliability under elevated thermal stress.
• Compact radial can: φ10×12.5 mm package with 5.0 mm lead spacing simplifies through-hole layout while providing substantial capacitance.
• Controlled leakage: Leakage current specified at 840 µA, allowing predictable bias behavior after initial application of rated voltage.
• Compliance-ready: RoHS compliance for use in regions requiring restricted-substance conformity.

Why Choose RNU1V121MDNASQ?

The RNU1V121MDNASQ positions itself as a dependable conductive-polymer aluminum capacitor option where high capacitance, low ESR, and strong ripple-current performance are required in a radial through-hole package. Its combination of 120 µF at 35 V, 18 mΩ ESR (100 kHz), and a wide −55°C to 105°C temperature range makes it well suited to general-purpose power-decoupling and energy-storage roles in electronic designs.

Engineers specifying this part benefit from predictable leakage behavior, a 5000-hour endurance rating at 105°C, and packaging suited for manual or wave solder assembly. It is appropriate for designs that prioritize robust ripple handling and long-term thermal reliability within the stated specifications.

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