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TDK Expands Compact Snap-In Capacitors for AI Server Power Supplies

TDK Corporation has expanded its ultra-compact snap-in aluminium electrolytic capacitor series (B43645, B43657, B43658, B43659, B43660, and B43661) with rated voltages up to 500 V. These capacitors are designed for high-power density applications in AI server power supply units (PSUs), high-performance switch-mode power supplies (SMPS), UPS systems, and solar inverters.

Key Specifications

• Rated voltage: up to 500 V DC
• Capacitance range: 80 µF – 2060 µF
• Dimensions: diameter 22–35 mm, length 25–100 mm
• Ripple current: up to 5.39 A
• Service life: up to 5,000 hours at +105 °C
• Design: aluminium can with PET sleeve, snap-in terminals, integrated pressure relief vent
• Versions: 2-terminal (standard) and 3-terminal (for correct polarity insertion)
• RoHS-compliant and vibration-tested according to IEC 60068-2-6

The compact capacitance-voltage (CV) design allows engineers to fit more capacitance into limited board space, increasing power density without enlarging the capacitor bank footprint. These devices are particularly suitable for continuous high-load operation in AI data centre power supplies.

Target Applications

• AI server power supply units (PSUs)
• High-performance switch-mode power supplies (SMPS)
• Uninterruptible power supplies (UPS)
• Solar inverters
• DC-link and energy storage circuits

TDK also provides the web-based AlCap Tool that helps calculate expected capacitor lifetime under specific operating conditions, supporting more accurate and reliable power supply designs.

Source: Electronics For You