RNU1A821MDN1

The RNU1A821MDN1 is a conductive polymer aluminum electrolytic capacitor in a compact radial lead can (φ8×11.5 mm) offering 820 µF capacitance at a 10 V rating. Designed for general-purpose power applications, it combines low ESR and high ripple-current capability in a small footprint for embedded and power-supply designs.

Key value propositions include low equivalent series resistance (10 mΩ at 20°C/100 kHz), high ripple handling (580 mA at 120 Hz and 5.8 A at 300 kHz), a wide operating temperature range (−55°C to +105°C) and a 2000-hour endurance at 105°C, all shipped in radial lead form with 3.5 mm lead spacing.

Key Features

• Conductive polymer aluminum construction — Provides solid-electrolyte performance with stable capacitance and leakage characteristics suitable for general-purpose use.
• Capacitance and tolerance — 820 µF with ±20% tolerance at 120 Hz, 20°C for predictable bulk energy storage and filtering.
• Low ESR — 10 mΩ measured at 20°C/100 kHz, minimizing I·R loss and improving power conversion efficiency.
• High ripple-current capability — Rated for 580 mA at 120 Hz (low frequency) and 5.8 A at 300 kHz (high frequency), supporting demanding ripple environments in switching supplies.
• Thermal and life endurance — Rated for continuous operation from −55°C to +105°C with a load life of 2000 hours at 105°C and rated voltage.
• Compact radial package — φ8×11.5 mm can, radial lead mounting with 3.5 mm lead spacing; available in bulk/bag packing and mass-production status for easy procurement and assembly.
• RoHS compliant — Meets RoHS requirements as noted in product data.

Typical Applications

• Power smoothing and bulk decoupling — Use as bulk energy storage on low-voltage rails where 820 µF at 10 V is required to stabilize supply voltage.
• DC–DC converter output filtering — Low ESR and high ripple current capability help reduce voltage ripple on converter outputs in compact designs.
• Embedded and industrial electronics — Compact radial package and wide temperature range support space-constrained boards operating across broad ambient conditions.
• Power management modules — Suitable for local energy buffering in power-management circuits that require a combination of capacitance and high-frequency ripple handling.

Unique Advantages

• High ripple tolerance in a small can — 5.8 A at 300 kHz ripple rating delivers significant ripple handling without a larger footprint, enabling denser power-stage layouts.
• Low loss at high frequency — 10 mΩ ESR at 100 kHz reduces dissipation and thermal rise in high-switching-frequency environments.
• Wide operating temperature span — −55°C to +105°C supports deployment across varied thermal environments while retaining performance.
• Reliable endurance — 2000-hour life at 105°C provides predictable long-term behavior for production designs.
• Radial-lead convenience — Standard lead spacing (3.5 mm) and bulk/bag packing simplify through-hole assembly and prototyping workflows.
• RoHS conformity — Facilitates compliance with environmental directives in many supply chains.

Why Choose RNU1A821MDN1?

The RNU1A821MDN1 positions itself as a compact, reliable conductive-polymer aluminum capacitor for designs that demand substantial capacitance, low ESR and strong ripple handling in a radial-lead form factor. Its combination of 820 µF capacity, 10 V rating, low 10 mΩ ESR, and high-frequency ripple capability makes it appropriate for engineers optimizing power-stage size, thermal performance and long-term stability.

This part is well suited to design teams and procurement groups building embedded power supplies, DC–DC converters, and power-management circuits that require a durable, RoHS-compliant capacitor with clear, verifiable specifications and production availability.

Request a quote or submit a pricing inquiry for RNU1A821MDN1 to evaluate suitability for your next design or production program.