RKS1E121MCNAJLGS

The RKS1E121MCNAJLGS from Nichicon is a surface‑mount, conductive polymer aluminum solid electrolytic capacitor providing 120 µF capacitance at a 25 V rating. It is part of the RKS series, designed for general‑purpose electronic assemblies that require stable capacitance, low ESR and high allowable ripple current.

Key value propositions include a low ESR of 20 mΩ (measured at 20°C, 100 kHz), high frequency ripple capability, and extended endurance—rated for 3000 hours at 125°C—making it suitable for demanding thermal and ripple environments within general‑purpose applications.

Key Features

• Construction / Package Conductive polymer aluminum solid electrolyte in a radial, can‑style SMD package designed for surface‑mount assembly.
• Capacitance & Voltage 120 µF nominal capacitance with tolerance of −20% to +20% and a rated voltage of 25 V.
• Low ESR & High Ripple Handling ESR of 20 mΩ at 20°C/100 kHz, low frequency ripple current 200 mA at 120 Hz and high frequency ripple current 2 A at 300 kHz.
• Electrical Losses Tangent of loss angle (tan δ) of 0.12 measured at 20°C, 120 Hz for predictable AC performance.
• Leakage & Polarization Polarized capacitor with specified leakage current of 150 µA.
• Temperature & Endurance Operating temperature range −55°C to 125°C and rated for 3000 hours life at 125°C under rated voltage.
• Assembly & Packaging Supplied in embossed carrier taping with moisture‑proof packing; compatible with lead‑free reflow up to a 260°C peak per the series specification.
• Regulatory RKS series is documented as compliant with the RoHS directive.

Typical Applications

• General‑purpose electronics — Provides stable bulk capacitance and low ESR in surface‑mount assemblies where general‑purpose electrolytic capacitance is required.
• High‑ripple power circuits — Designed for circuits that subject capacitors to significant ripple currents, leveraging the 2 A high‑frequency ripple capability and low ESR.
• High‑temperature environments — Suited for designs operating across −55°C to 125°C and applications needing a long endurance rating (3000 hours at 125°C).

Unique Advantages

• Low loss, low ESR: 20 mΩ ESR at 100 kHz reduces AC losses and supports efficient high‑frequency performance.
• High ripple tolerance: 2 A high‑frequency ripple current capability addresses demanding ripple conditions in power rails.
• Extended high‑temperature life: 3000 hours at 125°C provides predictable long‑term performance in elevated temperature applications.
• Surface‑mount radial can: Compact φ10 × 12.4 mm SMD can enables high capacitance in a board‑mountable form factor.
• Manufacturing ready: Embossed carrier taping with moisture‑proof packing and compatibility with 260°C lead‑free reflow simplify SMT assembly and handling.
• RoHS compliant: Series documentation indicates conformance with the RoHS directive for restricted substances.

Why Choose RKS1E121MCNAJLGS?

RKS1E121MCNAJLGS positions itself as a reliable, general‑purpose SMD capacitor that combines high capacitance with low ESR and robust ripple handling. Its 25 V rating, 120 µF capacitance and long endurance at 125°C make it appropriate for designers seeking stable bulk capacitance and consistent electrical performance under elevated temperature and ripple stress.

This part is well suited for engineers and procurement teams building compact, surface‑mount assemblies that require predictable lifetime behavior, RoHS compliance, and supply‑chain friendly packaging for automated assembly.

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