Overview
The 2.7V1F supercapacitor is a type of electric double-layer capacitor (EDLC) designed for low-voltage, high-capacitance applications. It bridges the gap between traditional capacitors and batteries, offering rapid charge/discharge cycles and superior cycle life compared to electrochemical batteries. Commonly packaged in cylindrical or coin-cell form factors, this component is widely used in consumer electronics, industrial equipment, and IoT devices where intermittent power backup is required. Its 2.7V rating represents the maximum operating voltage, while the 1F capacitance indicates its energy storage capacity.
Structure and Working Principle
The device consists of two activated carbon electrodes immersed in an organic electrolyte, separated by a porous membrane. When voltage is applied, ions from the electrolyte form double layers at each electrode interface, storing energy electrostatically without chemical reactions. Unlike batteries, this physical storage mechanism enables virtually unlimited charge cycles (typically 100,000+). The aluminum casing provides mechanical stability and serves as current collector, while the 2.7V rating is determined by the electrolyte's decomposition voltage limit.
Key Features
With typical equivalent series resistance (ESR) below 100 ohms, this supercapacitor can deliver high pulse currents, making it ideal for power buffer applications. Its low leakage current (usually <5μA) ensures prolonged energy retention. The component operates across a wide temperature range (-40°C to +70°C commonly) and maintains stable performance through thousands of charge cycles. Its compact size (often <10mm diameter) allows for space-efficient designs in PCB layouts.
Application Areas
Primary applications include real-time clock (RTC) backup in electronics, where it maintains memory during power interruptions. Industrial uses encompass meter backup, smart grid devices, and actuator power support. In consumer products, these capacitors enable quick-recharge features in toys, flashlights, and portable devices. Emerging applications include energy harvesting systems, where they store intermittent power from solar or kinetic sources for later use.
Maintenance and Precautions
While requiring minimal maintenance, users should monitor for capacity degradation over extended periods (typically 5-10 years). Avoid exposing to voltages exceeding 2.7V to prevent accelerated aging or electrolyte decomposition. Storage in high-humidity environments should be avoided to prevent terminal corrosion. During soldering, follow manufacturer-recommended temperature profiles (typically <260°C for 10 seconds maximum) to prevent internal damage.
B2B Procurement Guide
When sourcing 2.7V1F supercapacitors, verify key parameters including ESR (lower values for high-current applications), leakage current (critical for long-term backup), and operating temperature range. Request cycle life data at rated voltage. For bulk purchases (1,000+ units), expect 20-40% cost reduction compared to retail pricing. Lead times vary from 4-12 weeks depending on manufacturer capacity. Consider second-source options from reputable suppliers like Panasonic, AVX, or Eaton to ensure supply chain resilience.
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