Alternator Rectifier 120mm 50A Bosch IR IF KCB1 6 Diode Avalanche Diode RCT1052
Vehicle Compatibility
Complete alternator rectifier for Bosch alternator applications where the alternator uses a matching 120mm outer diameter rectifier plate and the same diode configuration. Specified as Bosch 12V IR/IF (KCB1) type with 6 avalanche diodes and a 50A rating for compatible alternator rebuild work. Listed for select Toyota alternator applications on Corolla and Avensis, and also cross-referenced to VAG 038903023P where the alternator/rectifier specification matches. Confirm by alternator label, rectifier OD and terminal layout before ordering.
- Toyota: Corolla; Avensis (Bosch alternator applications where IR/IF KCB1 rectifier spec matches)
- VAG: 038903023P
Specifications
- Reference: RCT1052
- Part Type: Alternator Rectifier
- Alternator Manufacturer: Bosch
- System Voltage: 12V
- Type: IR/IF (KCB1)
- Outer Diameter: 120mm
- Current Strength From: 50A
- Number Of Diodes: 6
- Diode Type: Avalanche Diode
OE Numbers
- VAG: 038903023P
Features
- Bosch rectifier assembly to support alternator overhaul on compatible 12V IR/IF (KCB1) alternators
- 120mm rectifier plate with 6 diode layout designed for matched Bosch alternator housings
- 50A avalanche diode specification for stable rectification and improved resilience under load
- Helps restore charging performance where failed diodes cause low charge, battery drain, or excessive AC ripple
- Confirming by alternator label and rectifier diameter reduces incorrect fitment on similar-looking rectifiers
Why Buy From Us
- Local South African stock with nationwide courier delivery
- 12-month warranty subject to correct application and installation
- Fitment support using alternator labels and clear photos of the existing rectifier and terminal layout
- Trusted by workshops and fleet operators for dependable charging system components
Trusted by thousands of South African drivers for quality and durability.
Installation & Maintenance Tips
- Disconnect the battery before alternator removal or rectifier replacement
- Confirm rectifier outer diameter (120mm) and Bosch IR/IF (KCB1) type before fitting
- Inspect stator windings, solder joints and insulation while the alternator is open
- Replace worn brushes and check slip rings during the rebuild to prevent repeat failures
- After installation, verify charging voltage under load and test for abnormal AC ripple
- If you are unsure about alternator repairs, have the unit fitted and tested by a qualified auto electrician
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Vehicle Compatibility
Complete alternator rectifier for Bosch alternator applications where the alternator uses a matching 120mm outer diameter rectifier plate and the same diode configuration. Specified as Bosch 12V IR/IF (KCB1) type with 6 avalanche diodes and a 50A rating for compatible alternator rebuild work. Listed for select Toyota alternator applications on Corolla and Avensis, and also cross-referenced to VAG 038903023P where the alternator/rectifier specification matches. Confirm by alternator label, rectifier OD and terminal layout before ordering.
- Toyota: Corolla; Avensis (Bosch alternator applications where IR/IF KCB1 rectifier spec matches)
- VAG: 038903023P
Specifications
- Reference: RCT1052
- Part Type: Alternator Rectifier
- Alternator Manufacturer: Bosch
- System Voltage: 12V
- Type: IR/IF (KCB1)
- Outer Diameter: 120mm
- Current Strength From: 50A
- Number Of Diodes: 6
- Diode Type: Avalanche Diode
OE Numbers
- VAG: 038903023P
Features
- Bosch rectifier assembly to support alternator overhaul on compatible 12V IR/IF (KCB1) alternators
- 120mm rectifier plate with 6 diode layout designed for matched Bosch alternator housings
- 50A avalanche diode specification for stable rectification and improved resilience under load
- Helps restore charging performance where failed diodes cause low charge, battery drain, or excessive AC ripple
- Confirming by alternator label and rectifier diameter reduces incorrect fitment on similar-looking rectifiers
Why Buy From Us
- Local South African stock with nationwide courier delivery
- 12-month warranty subject to correct application and installation
- Fitment support using alternator labels and clear photos of the existing rectifier and terminal layout
- Trusted by workshops and fleet operators for dependable charging system components
Trusted by thousands of South African drivers for quality and durability.
Installation & Maintenance Tips
- Disconnect the battery before alternator removal or rectifier replacement
- Confirm rectifier outer diameter (120mm) and Bosch IR/IF (KCB1) type before fitting
- Inspect stator windings, solder joints and insulation while the alternator is open
- Replace worn brushes and check slip rings during the rebuild to prevent repeat failures
- After installation, verify charging voltage under load and test for abnormal AC ripple
- If you are unsure about alternator repairs, have the unit fitted and tested by a qualified auto electrician
