RKS1C681MCNAHHGS

The RKS1C681MCNAHHGS is a surface-mount conductive polymer aluminum electrolytic capacitor offering 680 µF capacitance at 16 V. It is part of Nichicon's RKS series engineered for general-purpose power applications that require high capacitance, low impedance, and extended high-temperature endurance.

Designed for compact SMD assemblies, this polarized capacitor combines low ESR (30 mΩ at 100 kHz) and high allowable ripple current (1.6 A at 300 kHz) with a wide operating temperature range of −55 °C to 125 °C and a rated life of 3000 hours at 125 °C.

Key Features

• Capacitance & Voltage: 680 µF nominal capacitance with a rated voltage of 16 V and tolerance of ±20% at 120 Hz, 20 °C.
• Low ESR & High Ripple Handling: ESR of 30 mΩ at 20 °C / 100 kHz supports high-frequency ripple current up to 1.6 A (300 kHz) and low-frequency ripple current of 160 mA (120 Hz).
• Conductive Polymer Electrolyte: Solid conductive polymer construction for stable electrical characteristics and reduced loss—tangent of loss angle (tan δ) specified at 0.12 (20 °C, 120 Hz).
• Wide Temperature & Long Life: Rated for −55 °C to 125 °C with an endurance specification of 3000 hours at 125 °C, suitable for designs requiring extended high-temperature operation.
• Assembly & Packaging: Surface-mount radial can (φ8 × 8.7 mm length) supplied in embossed carrier taping with moisture-proof packing for automated pick-and-place and reflow assembly.
• Leakage & Reliability: Specified leakage current 544 µA and endurance/shelf-life characteristics per the RKS series specification; RoHS compliant.
• Soldering Heat Resistance: Compatible with reflow soldering conditions up to a 260 °C peak under the datasheet-prescribed profile.

Typical Applications

• Power supply decoupling: Low ESR and high ripple capability make this capacitor suitable for bulk decoupling on DC power rails in compact boards.
• DC-DC converter outputs: High capacitance and stable performance at elevated temperatures help stabilize switching regulator outputs and reduce output ripple.
• High-frequency switching circuits: The 30 mΩ ESR at 100 kHz and 1.6 A high-frequency ripple rating address filtering needs in high-frequency power stages.
• Industrial and telecom power modules: Extended 3000-hour life at 125 °C and wide temperature range support robust operation in demanding environments.

Unique Advantages

• High capacitance in an SMD can: 680 µF in a compact φ8 × 8.7 mm package enables high energy density for space-constrained designs.
• Low impedance at high frequency: 30 mΩ ESR at 100 kHz and 1.6 A ripple current rating reduce voltage ripple and improve regulator stability.
• Extended high-temperature endurance: 3000 hours at 125 °C provides predictable lifetime performance for thermally demanding applications.
• Assembly-ready packaging: Embossed carrier taping with moisture-proof packing supports automated assembly and handling.
• Solid polymer construction: Conductive polymer electrolyte and specified tan δ (0.12) deliver stable loss characteristics across operating conditions.
• RoHS compliant: Meets RoHS directive requirements for lead-free manufacturing environments.

Why Choose RKS1C681MCNAHHGS?

RKS1C681MCNAHHGS positions itself as a robust SMD solution for engineers who need high capacitance, low ESR, and reliable high-temperature performance in compact assemblies. Its conductive polymer design and quantified electrical characteristics (ESR, ripple current, tan δ, leakage) make it straightforward to evaluate for power-management, filtering, and decoupling roles.

This part is well suited for designers building industrial, communications, or other general-purpose electronic systems that require extended endurance at elevated temperatures, automated assembly readiness, and RoHS compliance. The combination of electrical performance and packaging options supports predictable integration and long-term reliability.

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