TDK Vibration-Resistant Axial/Soldering-Star Aluminum Electrolytic Capacitors

Introduction

TDK B43693, B43793, B41687, and B41787 series aluminum electrolytic capacitors are designed for demanding DC-link energy-storage and filtering applications. Their vibration-resistant construction, low ESR, and high ripple-current capability make them well suited to compact power systems operating from 48 V to 120 V battery supplies.

Part Description

These TDK aluminum electrolytic capacitors use axial and soldering-star mounting styles to support mechanically robust installation in compact capacitor banks. They are intended for DC-link circuits where high transient currents and ripple currents must be handled reliably.

Key characteristics include:

• Aluminum electrolytic capacitor construction
• Axial and soldering-star connection options
• Designed for 48 V to 120 V battery-system DC links
• Low equivalent series resistance (ESR)
• High ripple-current handling capability
• Standard vibration resistance up to 20 g
• Useful life rated at 2,500 hours at +125 °C
• Suitable for compact parallel capacitor-bank designs

The combination of electrical performance and mechanical durability makes these capacitors useful where conventional board-mounted capacitors may be exposed to sustained shock, vibration, or elevated temperature.

Applications

Potential applications include:

• DC-link capacitor banks
• Battery-powered inverters
• Motor drives and motor controllers
• DC/DC converters
• Bidirectional power converters
• Battery energy-storage systems
• 48 V and 96 V vehicle electrical systems
• Electric forklift and industrial vehicle power electronics
• UPS and backup-power converter stages
• High-current battery charging equipment
• Solar-storage power conversion systems
• Robotics and automated guided vehicle power systems

Industries

These capacitors can be used in a range of industries, including:

• Automotive and commercial transportation
• Electric mobility
• Industrial automation
• Robotics
• Renewable energy
• Energy storage
• Material handling
• Rail and heavy equipment
• Marine electronics
• Telecommunications power systems
• Aerospace and defense support equipment

Usage Ideas

1. 48 V Motor Controller DC Link
   Build a compact capacitor bank at the input of a 48 V brushless DC motor controller to reduce supply ripple and support load transients during acceleration.

2. Battery-to-Load DC/DC Converter
   Use parallel capacitors on the input and output DC rails of a high-current converter for a battery-powered industrial controller or mobile robot.

3. Vibration-Resistant Energy Storage Module
   Create a mechanically secured capacitor assembly for an electric utility vehicle, forklift, or automated guided vehicle operating on rough factory floors.

Conclusion

TDK’s B43693, B43793, B41687, and B41787 capacitor families provide a durable option for high-ripple DC-link applications in battery-powered systems. With low ESR, strong ripple-current capability, high-temperature life performance, and vibration resistance up to 20 g, they are particularly valuable in compact power electronics used in mobile, industrial, and transportation environments.