102 PHR-ST Series The 101/102 PHR ST series of aluminium capacitors from Vishay are constructed from a non-solid electrolyte encapsulated in an insulated aluminium case. These capacitors have a long life span, up to 15000 h at +85°C, and feature low ESR. Suitable applications for these aluminium capacitors include pulsed power supplies, buffering and filtering, uninterruptible power supply, motor drives, inverters and traction systems.