EPCOS Aluminum Electrolytic Capacitors

EPCOS aluminum electrolytic capacitors provide high-capacitance solutions for power applications requiring energy storage, filtering, and buffering. With decades of experience in electrolytic technology, EPCOS offers both general-purpose and specialized solutions optimized for specific applications including automotive, industrial, and consumer electronics.

Our aluminum electrolytic portfolio includes high-ripple current, extended-life, and snap-in configurations designed for harsh operating environments. Each series is engineered with enhanced electrolyte formulations and optimized construction techniques to deliver reliable performance over extended operational lifetimes.

Key Features

  • Extended operational life up to 8000 hours at +105°C
  • High ripple current capability for power applications
  • Wide voltage range from 6.3V to 500V
  • Multiple mounting options: radial, axial, snap-in, screw-terminal
  • AEC-Q200 qualified series for automotive applications
EPCOS Aluminum Electrolytic Capacitors

Product Series

B43504 Series - Snap-in Terminal

High-capacitance snap-in capacitors for high-power industrial applications

  • Capacitance: 1000µF to 220000µF
  • Voltage: 16V to 500V
  • Life: Up to 8000h at +105°C
  • Mounting: Snap-in terminals
View Series

B43547 Series - General Purpose

Standard general-purpose capacitors for commercial applications

  • Capacitance: 10µF to 56000µF
  • Voltage: 10V to 500V
  • Life: 2000h at +105°C
  • Mounting: Radial lead or screw-terminal
View Series

B43740 Series - High Ripple Current

Enhanced ripple current handling for switching applications

  • Capacitance: 10µF to 150000µF
  • Voltage: 10V to 450V
  • Life: Up to 8000h at +105°C
  • High ripple current capability
View Series

B43505 Series - SMD High Temp

Surface mount capacitors for reflow-compatible applications

  • Capacitance: 330µF to 15000µF
  • Voltage: 6.3V to 63V
  • Life: Up to 8000h at +105°C
  • Mounting: Surface mount (SMD)
View Series

B43741 Series - Ultra-Long Life

Extended life capacitors for critical applications

  • Capacitance: 100µF to 4700µF
  • Voltage: 10V to 80V
  • Life: Up to 15000h at +105°C
  • Specialized construction
View Series

B43504 Series - Snap-in Terminal Capacitors

The B43504 series provides high-capacitance snap-in aluminum electrolytic capacitors specifically designed for high-power industrial applications. These components feature robust construction suitable for applications requiring large bulk storage capacitance with high ripple current capability.

Ideal for DC-link applications in variable frequency drives, UPS systems, and renewable energy inverters, the B43504 series offers capacitance values up to 220,000µF with voltage ratings from 16V to 500V. The snap-in mounting provides secure mechanical connection while allowing for easy replacement during field maintenance.

  • Applications: DC-link in VFDs, UPS systems, solar inverters
  • Mounting: Snap-in terminals for secure mounting
  • Temperature Range: -40°C to +105°C
  • Compliance: IEC 60384-4 approved
EPCOS B43504 Series Snap-in Capacitor

B43547 Series - General Purpose Capacitors

The B43547 series offers general-purpose aluminum electrolytic capacitors suitable for a wide range of commercial applications. This series provides an optimal balance of performance, cost, and reliability for applications that do not require extended life or high ripple current capability.

Available with both radial lead and screw-terminal mounting options, the B43547 series covers capacitance values from 10µF to 56,000µF with voltage ratings from 10V to 500V. These capacitors are commonly used in consumer electronics, commercial power supplies, and industrial control systems.

  • Applications: Consumer electronics, commercial power supplies
  • Mounting: Radial lead or screw-terminal
  • Temperature Range: -40°C to +105°C
  • Life Rating: 2000h at +105°C
EPCOS B43547 Series General Purpose Capacitor

B43740 Series - High Ripple Current Capacitors

The B43740 series features enhanced ripple current handling capabilities specifically designed for switching power applications with high-frequency ripple currents. These capacitors use advanced electrolyte formulations and optimized construction to handle significantly higher ripple currents than standard electrolytic capacitors.

With extended life ratings up to 8000 hours at +105°C, the B43740 series is ideal for applications such as switch-mode power supplies, motor drives, and renewable energy systems where both high ripple current handling and long operational life are critical requirements.

  • Applications: SMPS, motor drives, renewable energy systems
  • Ripple Current: Up to 3.4 Arms rating
  • Temperature Range: -40°C to +105°C
  • Life Rating: Up to 8000h at +105°C
EPCOS B43740 Series High Ripple Current Capacitor

B43505 Series - SMD High Temperature Capacitors

The B43505 series provides surface mount aluminum electrolytic capacitors designed for automated assembly processes while maintaining high performance in power applications. These components are optimized for reflow soldering compatibility while providing extended operational life.

Ideal for automotive and industrial applications requiring SMD mounting, the B43505 series offers capacitance values from 330µF to 15,000µF with voltage ratings from 6.3V to 63V. The series is AEC-Q200 qualified for automotive applications and features low-profile can sizes suitable for space-constrained applications.

  • Applications: Automotive electronics, industrial controls
  • Mounting: SMD with reflow compatibility
  • Profile: Low-profile cans for space-constrained designs
  • Qualification: AEC-Q200 qualified for automotive
EPCOS B43505 Series SMD High Temperature Capacitor

B43741 Series - Ultra-Long Life Capacitors

The B43741 series features ultra-long life aluminum electrolytic capacitors specifically designed for critical applications requiring extended operational life. These capacitors use specialized electrolyte formulations and construction techniques to achieve life ratings up to 15,000 hours at +105°C.

Perfect for applications where component replacement is difficult or impossible, such as aerospace, medical equipment, and remote telecommunications systems. The series provides capacitance values from 100µF to 4,700µF with voltage ratings from 10V to 80V.

  • Applications: Medical devices, aerospace, telecommunications
  • Life Rating: Up to 15000h at +105°C
  • Temperature Range: -40°C to +105°C
  • Features: Specialized long-life construction
EPCOS B43741 Series Ultra-Long Life Capacitor

Technical Specifications

Capacitance Tolerance

Series Tolerance
B43504 ±20%
B43547 ±20%
B43740 ±20%
B43505 ±20%
B43741 ±20%

Voltage Ratings

Voltage Class (V) Available in All Series
6.3 Most series
10 All series
16-500 Wide range available
Custom Upon request

Temperature Performance

Parameter Value
Operating Temp. Range -40°C to +105°C
Storage Temp. Range -55°C to +125°C
Capacitance Change ±20% max at -40°C to +85°C
ESR Change ≤3× at -40°C

Life Expectancy

Series Hours at +105°C
B43504 2000-8000
B43547 2000
B43740 2000-8000
B43505 2000-8000
B43741 8000-15000

Application Areas

Power Supplies

DC-link and bulk storage applications in SMPS, UPS, and power converters. High ripple current handling for switching applications.

  • B43740 for high-ripple current applications
  • B43504 for high-capacitance requirements
  • B43505 for SMD power supplies

Motor Drives

DC-link applications in VFDs and servo drives. High ripple current handling and extended life requirements.

  • B43740 for high-power inverters
  • B43504 for large frame drives
  • AEC-Q200 options for automotive

Renewable Energy

Solar inverters, wind power systems, and energy storage. Extended life and high-reliability requirements.

  • B43741 for ultra-long life systems
  • B43740 for high-efficiency inverters
  • Temperature range capability

Automotive Electronics

On-board chargers, DC-DC converters, and motor control. AEC-Q200 qualified options available.

  • B43505 for SMD automotive applications
  • Extended temperature operation
  • Vibration and shock resistance

Design Resources

Aluminum Electrolytic Selection Guide

Comprehensive guide to selecting the right aluminum electrolytic capacitor for your application

Download Guide

Life Calculation Tool

Calculate expected life under your application conditions

Use Tool

Thermal Design Guidelines

Best practices for thermal management in high-power applications

Download Guidelines

SPICE Models

Simulation models for EPCOS aluminum electrolytic capacitors

Access Models

Need Application-Specific Component Selection?

Contact our technical team for assistance in selecting the optimal aluminum electrolytic capacitor for your specific requirements

📱 WhatsApp
💬 WeChat