>150 A 5,600 g Clockwise rotation Steel pulley Multifunctional regulator The B5 alternator is typical for Cup racecars. Ro- bustness increase for motorsport use. Free-running pulley for reduction of wear. The multifunctional regulator with special developed ASIC by Bosch controls the output voltage at B+ con- nection. Three-arm design allows the use of a clamping arm. Application Application >122 A at 6,000 rpm/80°C Max. ambient temperature 105°C, high current only with supported cooling air Max. ambient temperature (short-term) 120°C, high current only with supported cooling air Rotating direction Clockwise Technical Specifications Mechanical Data Body material Cast Aluminum Weight w/o pulley 5.6 kg Max. rotations 13,000 x 1/min Moment of inertia 26 kg*cm 2 Outer diameter w/o screw 156 mm Length w/o pulley 172 mm Battery B+ connection M8 Tightening torque at B+ 15 Nm Electrical Data Regulating voltage 14.4 V Temperature compensation -10 mV/K High temperature cut off de- rating -250 mV/K Excitation resistor (L) External Cut-in-speed 1,400 x 1/min Characteristic Rpm [1/min] I G [A] at 80°C 2,000 75 4,000 114 6,000 123 8,000 125 10,000 126 12,000 127 13,000 127.5 Please note: Measured with U=13.1 V and t=20 min Bosch Motorsport | Alternator B5 Alternator B5