RKS1H121MCNAJJGS

The RKS1H121MCNAJJGS is a surface-mount conductive polymer aluminum solid electrolytic capacitor offering 120 µF capacitance at a 50 V rating. Designed for general-purpose applications, it combines high capacitance density with low equivalent series resistance (ESR) and elevated ripple-current capability.

Key value propositions include a wide operating temperature range (−55 °C to 125 °C), a long rated life of 3000 hours at 125 °C, and packaging suitable for automated assembly, making the part well suited to power-management and decoupling roles in a variety of electronic systems.

Key Features

• Capacitance & Voltage — 120 µF nominal capacitance with a 50 V rated voltage and tolerance of −20% to +20%.
• Low Loss / Frequency Performance — tanδ (loss tangent) of 0.12 measured at 20 °C, 120 Hz, for stable AC performance.
• Low ESR and High Ripple Capability — ESR of 25 mΩ at 20 °C / 100 kHz and high-frequency ripple current capability of 1.6 A at 300 kHz (low-frequency ripple current 160 mA at 120 Hz).
• Leakage Current — Specified leakage current of 300 µA after rated voltage application.
• Extended Endurance — Load life rated to 3000 hours at 125 °C, with defined limits for capacitance change, tanδ and ESR after endurance testing.
• Robust Temperature Range — Operating temperature range from −55 °C to 125 °C for use across demanding thermal environments.
• SMD Radial Can Package — Compact φ10 × 10 (L: 1.0 × D: 1.0 cm) SMD radial can designed for surface-mount assembly.
• Assembly & Handling — Supplied in embossed carrier taping with moisture-proof packing; compatible with lead-free reflow soldering conditions up to a 260 °C peak.
• Regulatory — RoHS compliant.

Typical Applications

• Power supply decoupling — Low ESR (25 mΩ at 100 kHz) and 120 µF capacitance provide effective smoothing and decoupling on power rails in general-purpose equipment.
• DC–DC converter output filtering — High-frequency ripple current rating (1.6 A at 300 kHz) and stable tanδ make this capacitor suitable for output filtering in switching regulators.
• High-frequency power rails — The low ESR and HF ripple capability support applications that require stable performance at elevated switching frequencies.
• Industrial and communications electronics — Wide temperature range (−55 °C to 125 °C) and 3000-hour endurance at 125 °C suit designs exposed to thermal and load stress.

Unique Advantages

• Measured low ESR — 25 mΩ at 100 kHz reduces voltage drop under load and improves transient response on power rails.
• High allowable ripple current — 1.6 A at high frequency enables reliable operation in switching-power environments.
• Long high-temperature life — Rated 3000 hours at 125 °C for prolonged reliability under thermal stress.
• SMD packaging for automated production — Embossed carrier taping and moisture-proof packing support high-volume SMT assembly flows.
• Wide operating range — −55 °C to 125 °C operation supports diverse application environments without added thermal mitigation.
• RoHS compliant — Meets regulatory requirements for lead-restricted manufacturing processes.

Why Choose RKS1H121MCNAJJGS?

RKS1H121MCNAJJGS is positioned as a reliable, general-purpose SMD conductive polymer aluminum capacitor that balances high capacitance, low ESR and strong ripple-current capability with long-term endurance at elevated temperature. Its compact radial-can SMD package and taped packaging make it practical for automated assembly in production environments.

This part is well suited to engineers designing power-management, filtering and decoupling solutions where stable high-frequency performance, thermal resilience and production-ready packaging are required. Its RoHS compliance and mass-production status support scalable procurement and deployment in volume designs.

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