RKS1V121MCNAJLGS

The RKS1V121MCNAJLGS is a surface-mount conductive polymer aluminum electrolytic capacitor in the Nichicon RKS series. It delivers 120 µF capacitance at 35 V with low equivalent series resistance and elevated ripple-current capability for demanding power applications.

Designed for general-purpose electronic designs that require high temperature endurance and stable high-frequency performance, this SMD radial/can package supports up to 125°C operation and a rated load life of 3000 hours at 125°C.

Key Features

• Capacitance & Voltage: 120 µF rated capacitance with a rated voltage of 35 V and capacitance tolerance of -20% to +20% (measured at 20°C, 120 Hz).
• Low ESR & High Ripple Capability: ESR of 20 mΩ at 20°C/100 kHz and high-frequency ripple current rated at 2.0 A (300 kHz), with low-frequency ripple current of 200 mA (120 Hz).
• High Temperature Endurance: Rated operating temperature range from -55°C to +125°C with a load-life specification of 3000 hours at 125°C.
• Leakage & Loss: Leakage current specified at 210 µA; tangent of loss angle (tan δ) of 0.12 measured at 20°C, 120 Hz.
• Surface-Mount Packaging: SMD radial/can package, size φ10 × 12.4 mm length (L: 1.24 cm × D: 1.0 cm) supplied in embossed carrier tape with moisture-proof packing for automated assembly.
• RoHS Compliant: Meets RoHS directive requirements as indicated in the product documentation.

Typical Applications

• Power conversion modules: Use as bulk and decoupling capacitance where high ripple-current handling and low ESR (20 mΩ) improve converter stability and thermal performance.
• Point-of-load filtering: SMD form factor and high-frequency ripple capability (2.0 A @ 300 kHz) suit local decoupling in DC‑DC regulator outputs and power rails.
• High-temperature electronics: With a -55°C to 125°C operating range and 3000-hour endurance at 125°C, suitable for applications exposed to elevated junction or ambient temperatures.

Unique Advantages

• High ripple-current margin: Rated for 2.0 A at high frequency (300 kHz) and 200 mA at 120 Hz, enabling robust filtering under dynamic load conditions.
• Low ESR for improved efficiency: 20 mΩ ESR at 100 kHz reduces power loss and heating in high-frequency power paths.
• Extended high-temperature life: 3000 hours at 125°C provides predictable end-of-life characteristics for long-term thermal reliability.
• SMD-ready packaging: Embossed carrier taping with moisture-proof packing supports automated pick-and-place and reflow assembly processes.
• Measured performance values: Specified leakage current (210 µA) and tan δ (0.12 at 20°C, 120 Hz) give clear electrical targets for design verification.

Why Choose RKS1V121MCNAJLGS?

The RKS1V121MCNAJLGS combines conductive-polymer aluminum construction with low ESR and high ripple-current capability to address demanding power-management requirements in compact SMD packages. Its wide operating temperature range and 3000‑hour 125°C endurance make it a choice for designs where thermal stability and long-term performance are required.

This part is suited to engineers specifying reliable decoupling and bulk capacitance in power converters, point-of-load modules, and other high-frequency power circuits. The clear electrical specifications and tape-and-reel packaging simplify BOM selection and integration into automated assembly flows.

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