KEMET ALS30/31 Screw Terminal Capacitors | Selection Guide

High-performance industrial power systems demand DC-link components that balance extreme ripple current capacity with extended operational life. The KEMET ALS30/31 Series of screw terminal aluminum electrolytic capacitors provides the professional-grade reliability required for heavy-duty power conversion and smoothing applications.

Product Overview

The ALS30 (plain can) and ALS31 (threaded stud) series cover a comprehensive range of case sizes and voltage ratings up to 500VDC. Designed for high reliability, these capacitors offer a lifespan of up to 20,000 hours at +85°C. They are engineered to withstand high ripple currents, making them the preferred choice for frequency converters and uninterruptible power supply (UPS) systems where thermal management and longevity are critical.

Typical Applications

  • Frequency Converters and SMPS Power Supplies
  • Uninterruptible Power Supply (UPS) Systems
  • Telecommunications DC-DC Distribution
  • Industrial Process Control & Welding Equipment
  • AC Motor Control and Traction Systems

Key Features & Benefits

  • Operational Life: Up to 20,000 hours at +85°C (Vr, Ir applied).
  • High Current Density: Optimized for high ripple current handling.
  • Surge Capability: Excellent surge voltage protection across all VDC ratings.
  • Flexible Mounting: Available in plain can or threaded mounting stud configurations.

Selection Guide: 25V – 100V DC Range

Low Voltage Series (25V – 63V)

High Capacity Smoothing • 4,700µF to 680,000µF

Catalog Number Voltage Capacitance Case (mm) Action
ALS3(1)(2)153DA025 25 VDC 15,000 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)683KE025 25 VDC 68,000 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)684QT025 25 VDC 680,000 µF 90 x 220 REQUEST QUOTE
ALS3(1)(2)103DA040 40 VDC 10,000 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)473KE040 40 VDC 47,000 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)474QT040 40 VDC 470,000 µF 90 x 220 REQUEST QUOTE
ALS3(1)(2)472DA063 63 VDC 4,700 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)223KE063 63 VDC 22,000 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)224QT063 63 VDC 220,000 µF 90 x 220 REQUEST QUOTE

→ Continued: 200V to 500V Industrial Range

Selection Guide: 200V – 500V DC Range

High Voltage Industrial Series (200V – 400V)

UPS & Motor Control Applications • 220µF to 33,000µF

Catalog Number Voltage Capacitance Case (mm) Action
ALS3(1)(2)471DA200 200 VDC 470 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)222KE200 200 VDC 2,200 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)333QT200 200 VDC 33,000 µF 90 x 220 REQUEST QUOTE
ALS3(1)(2)471DA250 250 VDC 470 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)222KE250 250 VDC 2,200 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)223QT250 250 VDC 22,000 µF 90 x 220 REQUEST QUOTE
ALS3(1)(2)221DA400 400 VDC 220 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)102KE400 400 VDC 1,000 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)103QT400 400 VDC 10,000 µF 90 x 220 REQUEST QUOTE

Extreme Voltage Series (450V – 500V)

Pulse Operation & Energy Storage • 100µF to 10,000µF

Catalog Number Voltage Capacitance Case (mm) Action
ALS3(1)(2)151DA450 450 VDC 150 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)681KE450 450 VDC 680 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)103QT450 450 VDC 10,000 µF 90 x 220 REQUEST QUOTE
ALS3(1)(2)101DA500 500 VDC 100 µF 36 x 52 REQUEST QUOTE
ALS3(1)(2)471KE500 500 VDC 470 µF 51 x 82 REQUEST QUOTE
ALS3(1)(2)682QT500 500 VDC 6,800 µF 90 x 220 REQUEST QUOTE
Standard: IEC 60384-4  |  Rating: +85°C Long Life Grade  |  Climatic Category: 40/085/56

Our engineering team provides technical support for KEMET capacitor sizing in your specific power electronics application.

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