WL series 4700uF 50V

The WL series 4700µF 50V is rated for 15,000 hours at 105°C. Using the Arrhenius equation, expected lifetime at different temperatures: At 95°C: 30,000 hours (approximately 3.4 years), At 85°C: 60,000 hours (approximately 6.8 years), At 75°C: 120,000 hours (approximately 13.7 years), At 65°C: 240,000 hours (approximately 27 years). These calculations assume operation at rated ripple current. Lower ripple current extends lifetime further. For example, at 50% rated ripple current, multiply the calculated lifetime by 1.5. The WL series uses advanced electrolyte formulation that maintains stability over extended operation, ensuring consistent performance throughout the capacitor's life. For industrial applications targeting 10-year service life, I recommend designing for maximum case temperature of 70°C.

Design for case temperature below 70°C to achieve 10+ year service life in industrial applications.

The WL series offers 3-7x longer lifetime compared to standard aluminum electrolytic capacitors: Standard capacitors (2,000 hours at 85°C) vs WL series (15,000 hours at 105°C). When compared at the same operating temperature, the advantage is even greater. For example, at 75°C operating temperature: Standard capacitor rated 2,000h at 85°C: approximately 4,000 hours expected life, WL series rated 15,000h at 105°C: approximately 120,000 hours expected life (30x longer). The extended lifetime reduces maintenance costs, improves system reliability, and reduces total cost of ownership. While WL series capacitors have a higher initial cost (typically 20-30% more than standard series), the lifecycle cost is significantly lower when maintenance and replacement costs are considered. For applications where accessibility is difficult or downtime is expensive, the WL series is the preferred choice.

Choose WL series for applications where maintenance access is difficult or downtime costs are high.

The WL series is ideal for applications where long service life and high reliability are critical: LED Lighting - Street lights, high-bay industrial lighting, and outdoor fixtures where maintenance is expensive and disruptive. The 15,000-hour rating ensures 10+ year life in typical LED driver applications. Industrial Power Supplies - Factory automation, process control, and production equipment where downtime is costly. The long lifetime reduces maintenance requirements. Telecommunications - Base stations, data centers, and network infrastructure requiring 24/7 operation with minimal maintenance. Medical Equipment - Patient monitors, diagnostic equipment, and life support systems where reliability is paramount. Remote Installations - Solar inverters, wind turbines, and railway signaling where physical access is difficult. The WL series reduces the total cost of ownership by minimizing replacement and maintenance costs over the equipment lifetime.

Specify WL series for LED drivers, industrial power supplies, telecom equipment, and remote installations.

The WL series 4700µF 50V capacitor is rated for 3.2A RMS ripple current at 100kHz and 105°C. This high ripple current capability makes it suitable for high-power switching power supplies and LED drivers. The ripple current rating varies with frequency and temperature: At 120Hz: 1.6A RMS, At 20kHz: 2.4A RMS, At 100kHz: 3.2A RMS (rated), At 500kHz: 2.8A RMS. Temperature derating: At 85°C: 4.0A RMS (125% of rated), At 65°C: 5.0A RMS (156% of rated). The high ripple current capability is achieved through optimized foil design and low-resistance electrolyte. When operating at high ripple current, monitor the capacitor case temperature to ensure it does not exceed rated temperature. The self-heating from ripple current (P = I² × ESR) should be considered in thermal design. For example, at 3.2A ripple current and 0.08Ω ESR, power dissipation is approximately 0.82W.

For high-ripple applications, verify case temperature remains below rated temperature. Use multiple capacitors if needed.

Yes, the WL series is well-suited for outdoor LED lighting applications including street lights, parking lot lights, and high-bay industrial fixtures. The 105°C temperature rating provides margin for outdoor environments where ambient temperatures can reach 50-60°C combined with self-heating from the LED driver. The 15,000-hour lifetime at 105°C translates to 15+ years in typical LED driver applications operating at 70-80°C case temperature. For outdoor applications, consider these design recommendations: Use 50% voltage derating to maximize lifetime (25V capacitor for 12V LED driver, 50V for 24V driver), Ensure adequate heat sinking or airflow to keep case temperature below 85°C, Use conformal coating on the PCB to protect against humidity and pollution, Select capacitors with appropriate IP rating for the enclosure. The WL series has been successfully deployed in millions of LED street lights worldwide.

Specify WL series for outdoor LED lighting. Use 50% voltage derating and ensure adequate thermal management.

The WL series snap-in capacitors require proper mounting for reliable operation: PCB Hole Size - Standard 2.0mm or 2.5mm diameter holes for snap-in terminals. Ensure holes are clean and free of debris. Mounting Orientation - Vertical mounting is standard. Horizontal mounting is possible but may reduce ripple current capability due to reduced heat dissipation. Spacing - Maintain minimum 5mm clearance from adjacent components for heat dissipation. For high-ripple applications, increase spacing to 10mm. Mechanical Support - For large capacitors (35mm diameter and above), additional mechanical support may be required in high-vibration environments. Use adhesive or mounting clamps. Thermal Considerations - Ensure adequate copper area around mounting holes for heat dissipation. Use thermal vias for large capacitors. The snap-in terminals provide secure mechanical mounting and good electrical contact. The terminals are designed for single insertion - do not remove and reinsert capacitors as this may damage the terminals.

Follow PCB design guidelines for snap-in capacitors. Ensure adequate spacing and thermal management.