Axial High Temperature Aluminum Capacitors The Vishay / BC Components Axial High Temperature Aluminum Capacitors feature a cylindrical aluminum case, insulated with a blue sleeve and an extended temperature range of 125ºC (usable up to 150ºC). The Axial High Temperature Aluminum Capacitors have a rated capacitance range, CR, of 1 to 10,000µF and a voltage range, UR 6.3 to 200V. Vishay / BC Components has designed the capacitors for automotive, industrial, and communication applications for smoothing, filtering, coupling, decoupling, and timing.