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1277840 - High Output Alternator

  • 3D Photo
    1277840 3D Photo
  • Front Photo
    1277840 Front Photo
  • Rear Photo
    1277840 Rear Photo
  • Side Photo
    1277840 Side Photo
  • Front Dim Drawing
    1277840 Front Dim Drawing
  • Rear Dim Drawing
    1277840 Rear Dim Drawing
  • Side Dim Drawing
    1277840 Side Dim Drawing
  • Output Curve
    1277840 Output Curve
  • Wiring Diagram
    1277840 Wiring Diagram
Product Specifications
Spec Value
Item number 1277840
Sales number N/A
Series number AC172R/RA/TRA
Special Note Conditions Of Usage
Warning: Prestolite Products are not approved for Aviation applications!
New, 12.3, 12.38, 12.3
Fix circle (Mount): 120mm
Fix circle (Adjuster): 120mm
Bracket angle: 60°
Cut in speed: 990, Max speed: 8000
Weight: 15.0kg
System voltage 24
Output 140
Mounting style SWUNG (RH)
Dimensions in N/A
Housing coating PAINTED
UL Approved No
Positive stud size N/A
Negative stud size N/A
Rectifier location  
Shaft diameter 30 MM
Excitation type  
Regulator location  
Regulator number  
Diode trio No
Pulley required No
Lamp driver No
Adjustable regulator No
Remote sense No
Smart check No
Batteryless No
Region Priority / Status
United Kingdom / Europe Not currently available - Superseded
Product status
Status Number
Superseded by 1277A840
Parts Breakdown
Title / Link Description
AC172 Service Parts List Service parts list for AC172RA-TRA series alternators
SP4007_AC172RA-TRA_Series.pdf (1.8 mb)
Title / Link Description
AC172RA Alternator Series AC172RA alternator series replacements for Bosch T1 alternators.
FL4185_4_AC172RA.pdf (1.1 mb)
Cross Reference Numbers
CompanyPart numberComment
BOSCH 0120689523  
BOSCH 0120689546  
DAF 1232608  
DAF 1248660  
DAF 266679  
FLEX-EX 482955  
ISKRA 11203231  
ISKRA IA1094  
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