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1277690 - High Output Alternator

  • 3D Photo
    1277690 3D Photo
  • Front Photo
    1277690 Front Photo
  • Rear Photo
    1277690 Rear Photo
  • Side Photo
    1277690 Side Photo
  • Front Dim Drawing
    1277690 Front Dim Drawing
  • Rear Dim Drawing
    1277690 Rear Dim Drawing
  • Side Dim Drawing
    1277690 Side Dim Drawing
  • Output Curve
    1277690 Output Curve
  • Wiring Diagram
    1277690 Wiring Diagram
Product Specifications
Spec Value
Item number 1277690
Sales number N/A
Series number AC172R/RA/TRA
Special Note Conditions Of Usage
Warning: Prestolite Products are not approved for Aviation applications!
Notes 172 mm frame
New, 12.3, 12.38, M12
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 DUAL FOOT
Dimensions in MILLIMETERS
Housing coating RAW
UL Approved No
Positive stud size M8X1.25
Negative stud size M8X1.25
Rectifier location INTERNAL
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
USA / Canada Not currently available - Superseded
United Kingdom / Europe Not currently available - Superseded
Product status
Status Number
Superseded by 1277A690
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)
Numbers Our Customers Use
CompanyPart number
Cross Reference Numbers
CompanyPart numberComment
AIM AB-00320R  
BOSCH 0-120-689-520  
BOSCH 0120689506  
BOSCH 0120689542  
BOSCH 39530  
IAT A1092  
MERCEDES BENZ 007154242802  
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