KEMET T550B256M100AT42520100

The T550 axial-leaded and T555 surface-mount Polymer Hermetically Sealed (PHS) devices are tantalum capacitors featuring a tantalum anode and Ta₂O₅ dielectric. A conductive organic polymer replaces the conventionally used MnO₂ or wet electrolyte as the cathode plate of the capacitor. This gives the capacitor very low ESR and improved capacitance retention at high frequencies and low temperatures. PHS devices also exhibit a benign failure mode, eliminating the case rupture issues that can occur with wet tantalum capacitors. Furthermore, these devices can operate at up to 80% of rated voltage with reliability comparable to or better than conventional MnO₂ or wet tantalum capacitors operating at 50% of rated voltage.

PHS capacitors also offer higher ripple current handling capability and lower ESR than wet tantalum capacitors. Due to reduced ESR and enhanced capacitance retention at higher frequencies and low temperatures, these devices provide the highest total capacitance and most cost-effective solution for high-power applications, with a package approximately 25% lighter than equivalent wet tantalum capacitors.

• F-Tech anode technology, eliminating hidden defects in the dielectric
• 100% analog breakdown screening
• Maximum operating temperature +105°C
• Qualified parts available per DLA drawing 13030
• Polymer cathode technology
• Ultra-low ESR
• High capacitance retention at high frequency and low temperature
• 100% constant voltage conditioning (240 hours)
• 100% surge current testing
• High volumetric efficiency
• Non-ignition failure mode
• Approximately 25% lighter than equivalent wet tantalum capacitors
• T555 surface mount design

Typical applications include high-voltage power management such as buck/boost converters, filtering, energy storage capacitors, and other high-ripple-current applications.