Alternator B5

The B5 alternator is typical for Cup racecars. Robustness 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+ connection.

Three-arm design allows the use of a clamping arm.

Features

  • >150 A
  • 5,600 g
  • Clockwise rotation
  • Steel pulley
  • Multifunctional regulator

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*cm2

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 derating

-250 mV/K

Excitation resistor (L)

External

Cut-in-speed

1,400 x 1/min

Characteristic

Rpm [1/min]

 

IG [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

Installation Notes

Typical lifetime before service: max. 6,000 km / 30 h

For application with severe conditions and/or high volume, please contact your Bosch Motorsport counterpart in order to define the most appropriate validation program.

Ground connection for power and regulator is through the case. Ensure that the case has a high current, low electrical resistance connection to vehicle ground.

Ordering Information

Alternator B5

Order number: F02U.V01.747-03

Dimensions

Offer Drawing

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