RFS0J121MCN1GS

The RFS0J121MCN1GS from Nichicon is a conductive polymer aluminum solid electrolytic capacitor in the RFS series, offering 120 µF nominal capacitance at a 6.3 V rating in a compact surface-mount radial can. It targets general-purpose electronic designs that require high capacitance, low equivalent series resistance (ESR), and robust ripple-current capability in a small SMD footprint.

Key value comes from low ESR and high ripple-current handling for efficient high-frequency decoupling, plus long endurance at elevated temperatures: 2000 hours at 105°C. The part is RoHS compliant and provided in embossed carrier taping with moisture-proof packing for production-ready assembly.

Key Features

• Conductive polymer aluminum construction — Solid electrolyte design for stable electrical performance and reliable SMD mounting.
• Capacitance and tolerance — 120 µF with ±20% tolerance (–20% to +20%) at 120 Hz, 20°C.
• Low ESR — 24 mΩ specified at 20°C / 100 kHz to support high-frequency decoupling and reduced dissipation.
• High ripple-current capability — 250 mA at 120 Hz (low frequency) and 2.5 A at 300 kHz (high frequency) for switching and power-supply applications.
• Controlled dissipation factor and leakage — tanδ 0.12 (20°C / 120 Hz) and leakage current 300 µA (after 2 minutes at 20°C) for predictable behavior in designs.
• Robust thermal endurance — Rated operating range –55°C to 105°C with 2000 hours life at 105°C under rated voltage.
• Compact SMD package — Case size φ5 × 5.7 mm (L: 5.7 × D: 5 mm) with recommended land size 5.3 × 5.3 mm; SMD radial can footprint for space-constrained PCBs.
• Production-ready packing and compliance — Embossed carrier taping / moisture-proof packing; RoHS compliant and compatible with lead-free reflow (260°C peak per datasheet).

Typical Applications

• General-purpose power decoupling — Local energy storage and high-frequency decoupling on 6.3 V rails where low ESR matters.
• Switching regulator output filtering — Low ESR and 2.5 A ripple capability at 300 kHz support smoothing and noise reduction on switching converter outputs.
• Bulk smoothing in compact SMD designs — 120 µF capacitance in a φ5×5.7 mm package for compact boards that require automated placement and moisture-proof packing.

Unique Advantages

• Low high-frequency loss: 24 mΩ ESR at 100 kHz provides efficient high-frequency performance and helps minimize power loss.
• High ripple tolerance: Rated for up to 2.5 A ripple current at 300 kHz (and 250 mA at 120 Hz), enabling reliable operation with switching loads.
• Space-efficient capacitance: Delivers 120 µF in a compact φ5×5.7 mm SMD can, easing BOM consolidation where board space is limited.
• Extended temperature endurance: 2000-hour life at 105°C supports designs exposed to elevated operating temperatures.
• Predictable electrical behavior: Specified tanδ (0.12) and leakage current (300 µA) give predictable margins for margin-sensitive designs.
• Manufacturing-friendly packaging: Embossed carrier taping and moisture-proof packing simplify automated placement and storage; part is in mass production.

Why Choose RFS0J121MCN1GS?

RFS0J121MCN1GS positions itself as a reliable, production-ready SMD capacitor for designers who need substantial capacitance on 6.3 V rails with low ESR and strong ripple-current performance. Its conductive polymer construction, controlled electrical parameters, and 2000-hour endurance at 105°C make it suitable for compact power-delivery and decoupling tasks where thermal and frequency performance matter.

Available in embossed carrier taping with moisture-proof packing and offered in mass-production status, this Nichicon RFS-series part is a practical choice for teams optimizing board area, manufacturing flow, and long-term reliability in general-purpose electronic applications.

Request a quote or contact sales to discuss pricing, availability, and delivery for RFS0J121MCN1GS.