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  • Aftermarket Alternator Rectifier IBR301
Aftermarket Alternator Rectifier IBR301
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Aftermarket Alternator Rectifier IBR301

Bosch
IBR301
In stock
Rectifier
$70.00
Aftermarket Alternator Rectifier IBR301

Shipping

In-stock orders ship out same day or next business day via USPS.

Pre Order

Pre-orders ship out in the order received within 7–21 business days.

Customer Support

Need help finding a part? Contact Support@RCAutoElectric.com

Description

Specifications

  • MFR:BOSCH
  • DIM 1:114mm OD
  • DIM 2:M6 x 1.0 x 33mm Batt. Term.
  • FEATURE 1:100% New
  • FEATURE 2:6-40A press-fit diodes
  • NOTE 1:With W-terminal. With diode trio.
  • NOTE 2:Similar to IBR304 except IBR304 w/o W-terminal.
  • SPECS FOR:Bosch 489 Series 45-65A IR/EF Alternators
  • SPECS:12 Volt

USED ON

  • Case (1982-2006) ** Deutz-Allis (1986-1988) ** Deutz-Fahr (1984-1988) ** Steyr (1989-1989) ** Volvo (1982-1986)

Replaces

  • Bosch 1 127 011 131, IHC, Navistar W941525, KHD 132-0418, Volvo 1363915

LESTER NUMBERS

  • 12146, 12147, 14387, 14421, 14781

UNIT NUMBERS

  • Atlas Copco 291317870, 291317870; Bomag 05710960, 05710960; Bosch 0 120 400 941, 0 120 400 942, 0 120 488 144, 0 120 488 144, 0 120 488 185, 0 120 488 185, 0 120 488 209, 0 120 488 209, 0 120 489 069, 0 120 489 070, 0 120 489 183, 0 120 489 286, 0 120 489 294, 0 120 489 296, 0 120 489 309, 0 120 489 309, 0 120 489 309, 0 120 489 475, 0 120 489 481, 0 120 489 901, 0 120 489 901, 9 120 690 465; Case A186124, A186125, A186153, AR186125, P941518P; Cummins 3604479RX, 3604480RX, 3675270NW, 3675275NW, 3911247, 3911248; DAF 1516536R, 1516536R; Deutz Engine Mfr 0117 5731, 0117 5731, 0117 8299, 0117 8299, 0117 8521, 0117 8521, 0117 8606, 0117 8606, 01175731, 0118 2151, 0118 2151, 0118 3447, 0118 3447, 0118 3638, 0118 3852, 0118 3852, 01182151, 01182151; Fendt 31 100 090 048, 31 100 090 048; Hanomag Massey Ferguson 4225119M91; JLG Industries 700063; John Deere RE509106; KHD 117-5731; Letrika (Iskra) 11.201.935, 11.203.405, 11.203.405, 11.203.405, 11.204.880, 11.204.880, 11.204.880; Letrika (Iskra) Tech. AAK1336, AAK1363, AAK3330, AAK3336, AAK3579, AAK3580, AAK3580, AAK3818, AAK4349, AAK4349, AAK4349, AAK4620, AAK4620, AAK4620, AAK4825, AAK4830, AAK5123; Letrika Old 11.201.478, 11.204.050; Magneton 9-513-820, 9-515-170, 9-515-220, 9-515-220, 9-515-220; MWM Diesel 605710100155; Prestolite 20110134, 20110134, 20110134, 20130211, PBNA1134, PBNA1134, PBNA1134, PBNA1134; Steyr 311 00 90 048, 311 00 90 048, G205 900 010 010, G205 900 010 010; Volvo 1308719, 1308766, 1323230-1, 1323488, 1323488-0, 1323488-5, 1323912, 1323912-4, 1324957, 1324957-0, 1324957-8, 5001960-3, 5002048-0, 5002048-6, 5002271, 5002271-0, 5002271-4, 5003001-0, 5003001-4

Vehicle Application

Make Model Year Engine
Case IH 1896 1984-1989 L6 5.9L 359cid Cummins
Case IH 2096 1985-1990 L6 5.9L 359cid Cummins
Case IH 5120 1990-1997 L4 3.9L 239cid Cummins 4TA390
Case IH 5130 1990-1997 L6 5.9L 359cid Case 6-590
Case IH 5140 1990-1997 L6 5.9L 359cid Case 6T-590
Case IH 5220 1992-2001 L4 3.9L 239cid Cummins
Case IH 5230 1992-2001 L6 5.9L 359cid Cummins
Case IH 5240 1992-2001 L6 5.9L 359cid Cummins
Case IH 5250 1992-2001 L6 5.9L 359cid Cummins
Case IH 8830 1992-2001 L4 3.9L 239cid Cummins 4TA390
Case IH 8840 1988-1997 L4 3.9L 239cid Cummins 4TA390
Case IH JX90U 2002-2003 L4 3.9L 239cid Iveco
Case IH MX100 1996-2002 L6 5.9L 359cid Cummins
Case IH MX110 1996-2002 L6 5.9L 359cid Cummins
Case IH MX120 1996-2002 L6 5.9L 359cid Cummins
Case IH MX135 1996-2002 L6 5.9L 359cid Cummins
Case 1088 1988-1992 6T-590 Diesel
Case 1150 1965-1974 L6 6.6L 401cid Case 401
Case 1150 1965-1974 L6 6.6L 401cid Case 401B
Case 1150E 1985-1994 L6 5.9L 359cid Case 6T-590
Case 1150E 1985-1996 6-590 Diesel
Case 1150E 1990-1996 6-830 Diesel
Case 1150G 1995-1999 6-590 Diesel
Case 1150H 2000-2006 L6 5.9L 359cid Case 6T-590
Case 1155E 1985-1989 6-830 Diesel
Case 1155E 1985-1994 L6 5.9L 359cid Case 6T-590
Case 1155E 1985-1994 L6 8.3L 504cid Case 6T-830
Case 1155E 1990-1993 6-590 Diesel
Case 1187C Feller Buncer 1989-1992 6T-830 Diesel
Case 125B 1988-1990 L6 6.1L 374cid Deutz BF6L 913
Case 1550 1987-1989 6-830 Diesel
Case 1550 1988-1995 L6 8.3L 504cid Case 6T-830
Case 170C 1989-1994 L6 9.6L 9572cc 584cid Deutz BF6L 513
Case 1818 1987-1998 L3 0.9L 52cid Kubota D850
Case 1835 1980-1983 L4 2.4L 148cid Case 148B
Case 1835B 1980-1988 L4 2.4L 148cid Case 148G
Case 1835B 1982-1988 148 / 159 Gas
Case 1835B 1982-1988 188 Diesel
Case 1835C 1987-1991 Teledyne Diesel Engines
Case 1835C 1987-1991 Teledyne Gas Engines
Case 1835C 1987-1995 L4 2.0L ContinentaL TM20
Case 1835C 1987-1995 L4 2.0L ContinentaL TMD20
Case 1840 1989-2002 L4 3.9L 239cid Case 4-390
Case 1840 1990-1999 390 Diesel
Case 1845B 1983-1985 L4 2.6L 159cid Case 159
Case 1845B 1983-1985 L4 3.1L 188cid Case G188D
Case 1845C 1985-2001 L4 3.9L 239cid Case 4-390
Case 1845C 1987-1992 390 Diesel
Case 1845S 1975-1988 L4 2.6L 159cid Case 159D
Case 220B 1984-1994 V10 15.9L 970cid Deutz F10L 413F
Case 360 1986-2004 L2 1.4L 1370cc 84cid Deutz
Case 360 1988-1992 Deutz Engine
Case 40XT 2001-2005 L4 3.9L 239cid Case 4-390
Case 450C 1983-1993 4-390 Diesel
Case 450C 1983-1995 L4 3.9L 239cid Case 4-390
Case 450C 1983-1995 L4 3.9L 239cid Case 4T-390
Case 450C 1989-1994 4-390
Case 455C 1983-1991 L4 3.9L 239cid Case 4-390
Case 455C 1983-1991 L4 3.9L 239cid Case 4T-390
Case 455C 1983-1993 4-390 Diesel
Case 480C 1976-1980 L4 3.1L 188cid Case G188D
Case 480E Construction King 1989-1994 4-390 Diesel
Case 480E LL Construction King 1989-1994 4-390 Diesel
Case 480E LL 1985-1990 L4 3.9L 239cid Case 4-390
Case 480E 1985-1990 L4 3.9L 239cid Case 4-390
Case 480F Construction King 1989-1994 4-390 Diesel
Case 480F LL Construction King 1989-1994 4-390 Diesel
Case 480F LL 1989-1994 L4 3.9L 239cid Case 4-390
Case 480F 1989-1994 L4 3.9L 239cid Case 4-390
Case 521D 2001-2006 390 Diesel
Case 550 1989-1991 4-390 Diesel
Case 550 1989-1992 L4 3.9L 239cid Case 4-390
Case 550 1989-1992 L4 3.9L 239cid Case 4T-390
Case 550E 1992-1994 L4 3.9L 239cid Case 4-390
Case 550E 1992-1994 L4 3.9L 239cid Case 4T-390
Case 550G LGP 1995-1998 L4 3.9L 239cid Case 4-390
Case 550G 1995-1998 L4 3.9L 239cid Case 4-390
Case 550H 2000-2012 L4 3.9L 239cid Case 4-390
Case 560 1993-2004 L4 2.2L 2197cc 134cid Kubota KUBOTA
Case 570L XT 1994-2001 L4 3.9L 239cid Case 4-390
Case 570M XT III 2008-2012 L4 4.5L 274cid Case 445T
Case 570M XT 2001-2010 L4 3.9L 239cid Case 4-390
Case 570M XT 2001-2010 L4 4.5L 274cid Case 445T
Case 580E 1983-1989 L4 3.9L 239cid Case 4-390
Case 580K 1986-1994 4-390 Diesel
Case 580K 1987-1995 L4 3.9L 239cid Case 4-390
Case 580L II 1997-2001 L4 3.9L 239cid Case 4-390
Case 580L 1995-1999 L4 3.9L 239cid Case 4-390
Case 580M 2000-2004 L4 3.9L 239cid Case 4-390
Case 580SE 1983-1988 Case
Case 580SE 1983-1988 L4 3.9L 239cid Case 4-390
Case 580SK 1996-1997 L4 3.9L 239cid Case 4-390
Case 580SL II 1994-2001 L4 3.9L 239cid Case 4T-390
Case 580SL 1998-2001 L4 3.9L 239cid Case 4T-390
Case 580SLE 1997-2001 L4 3.9L 239cid Case 4-390
Case 580SM 2000-2005 L4 4.5L 274cid Case 445T
Case 584E 1988-2000 L4 3.9L 239cid Case 4-390
Case 584E 1990-1992 390 Diesel
Case 585E 1988-1989 L4 3.9L 239cid Case 4-390
Case 585E 1990-1992 390 Diesel
Case 585G 1999-2009 L4 3.9L 239cid Case 4-390
Case 586E 1988-1989 L4 3.9L 239cid Case 4-390
Case 586E 1990-1992 390 Diesel
Case 586G 1999-2012 L4 3.9L 239cid Case 4-390
Case 590 1988-2008 L4 3.9L 239cid Case 4T-390
Case 590L 1998-1999 L6 5.9L 359cid Case 6-590
Case 590SL II 1998-2000 L4 3.9L 239cid Case 4T-390
Case 590SL 1995-1999 L6 5.9L 359cid Case 6-590
Case 590SM 2001-2004 L4 4.5L 274cid Case 445T
Case 602D 1985-1992 L4 4.3L 262cid Deutz
Case 6030 2000-2005 L4 3.9L 239cid Case 4-390
Case 60XT 2002-2005 L4 3.9L 239cid Case 4-390
Case 60XT 2002-2005 L4 3.9L 239cid Case 4T-390
Case 621 1989-1993 6T-590 Diesel
Case 621 1992-1994 L6 5.9L 359cid Case 6T-590
Case 650 1990-1991 L4 3.9L 239cid Case 4T-390
Case 650G 1994-2000 L4 3.9L 239cid Case 4T-390
Case 650H 2000-2003 L4 3.9L 239cid Case 4T-390
Case 650K I 2001-2005 L4 3.9L 239cid Case 4-390
Case 650K II 2005-2009 L4 4.5L 274cid Case 445T
Case 650K III 2006-2008 L4 4.5L 274cid Case 445T
Case 660 1986-2003 L4 3.9L 239cid Case 4-390
Case 680K Construction King 1984-1988 6-590 Diesel
Case 680K 1984-1989 L6 5.9L 359cid Case 6-590
Case 680L Construction King 1988-1994 6-590 Diesel
Case 680L 1988-1994 L6 5.9L 359cid Case 6-590
Case 686G II 1999-2003 L4 3.9L 239cid Case 4-390
Case 686G II 1999-2003 L4 3.9L 239cid Case 4T-390
Case 686G 1998-2001 L4 3.9L 239cid Case 4-390
Case 686G 1999-2001 L4 3.9L 239cid Case 4T-390
Case 686GXR 1998-2002 L4 3.9L 239cid Case 4-390
Case 686GXR II 1999-2003 L4 3.9L 239cid Case 4-390
Case 686GXR II 1999-2003 L4 3.9L 239cid Case 4T-390
Case 688 1987-1992 4-390 Diesel
Case 688BCK 1991-1995 4-390 Diesel
Case 688C 1991-1995 4-390 Diesel
Case 688G II 1999-2003 L4 3.9L 239cid Case 4-390
Case 688G 1998-2001 L4 3.9L 239cid Case 4-390
Case 688G 1999-2001 L4 3.9L 239cid Case 4T-390
Case 70XT 2002-2005 L4 3.9L 239cid Case 4-390
Case 70XT 2002-2005 L4 3.9L 239cid Case 4T-390
Case 721 1989-1992 L6 8.3L 504cid Case 6T-830
Case 721 1989-1993 6T-830 Diesel
Case 750H 2000-2003 L4 3.9L 239cid Case 4-390
Case 750K I 2002-2005 L4 3.9L 239cid Case 4-390
Case 750K II 2005-2015 L4 4.5L 274cid Case 445T
Case 750K III 2007-2015 L4 4.5L 274cid Case 445T
Case 750K 2002-2007 L4 3.9L 239cid Case 4-390
Case 75XT 2002-2005 L4 3.9L 239cid Case 4-390
Case 75XT 2002-2005 L4 3.9L 239cid Case 4T-390
Case 760 1988-1992 390 Diesel
Case 760 2000-2004 L4 3.9L 239cid Case 4-390
Case 780C Construction King 1984-1988 6T-590 Diesel
Case 780C 1981-1989 L6 5.9L 359cid Case 6T-590
Case 780D Construction King 1988-1992 6T-590 Diesel
Case 780D 1988-1994 L6 5.9L 359cid Case 6T-590
Case 821 1989-1993 6T-830 Diesel
Case 850D 1984-1991 6-590 Diesel
Case 850D 1985-1994 L6 5.9L 359cid Case 6-590
Case 850D 1985-1994 L6 5.9L 359cid Case 6T-590
Case 850E 1992-1996 6-590 Diesel
Case 850G 1994-2000 6-590 Diesel
Case 850H 2000-2003 L6 5.9L 359cid Case 6T-590
Case 850K II 2005-2008 L6 6.8L 415cid Case 668T
Case 850K III 2005-2008 L6 6.8L 415cid Case 668T
Case 850K 2002-2007 L6 5.9L 359cid Case 6-590
Case 855D 1984-1991 6-590 Diesel
Case 855D 1984-1994 L6 5.9L 359cid Case 6-590
Case 855D 1984-1994 L6 5.9L 359cid Case 6T-590
Case 855E 1992-1994 L6 5.9L 359cid Case 6-590
Case 855E 1992-1994 L6 5.9L 359cid Case 6T-590
Case 85XT 1997-2005 L4 3.9L 239cid Case 4-390
Case 85XT 1997-2005 L4 3.9L 239cid Case 4T-390
Case 860 1992-2003 L4 3.9L 239cid Case 4-390
Case 888 1988-1992 6T-590 Diesel
Case 90XT 1997-2005 L4 3.9L 239cid Case 4-390
Case 90XT 1997-2005 L4 3.9L 239cid Case 4T-390
Case 921 1992-1995 L6 10.0L 611cid Cummins LTA10
Case 95XT 2001-2005 L4 3.9L 239cid Case 4-390
Case 95XT 2001-2005 L4 3.9L 239cid Case 4T-390
Case 960 1992-2005 L4 3.9L 239cid Case 4-390
Case 988 1996-2006 Cummins 6T590
Case DH4 1982-1988 L4 2.1L 125cid Mitsubishi
Case DH4B 1979-1991 L4 2.1L 125cid Mitsubishi
Case W1102D 1990-1997 L6 5.9L 359cid Case 6-590
Case W11B 1983-1993 390 Diesel
Case W14B 1985-1989 6-590 Diesel
Case W14C 1990-1993 6-590 Diesel
Case W14C 1990-1993 L6 5.9L 359cid Case 6-590
Case W14C 1990-1993 L6 5.9L 359cid Case 6T-590
Case W18B 1983-1988 504 Diesel
Case W20C 1982-1989 504 Diesel
Case W30 1984-1989 504 Diesel
Caterpillar 416 1986-1992 L4 3.9L 236cid Perkins 4.236
Caterpillar 426 1986-1992 L4 3.9L 236cid Perkins 4.236
Caterpillar 426B 1991-1996 L4 4.4L 269cid CaterpiLLar 3054T
Caterpillar 428 1986-1992 L4 3.9L 236cid Perkins 4.236
Caterpillar 436 1988-1992 L4 3.9L 236cid Perkins 4.236
Caterpillar 436B 1990-1999 L4 4.4L 269cid CaterpiLLar 3054T
Caterpillar 446B 1993-2004 L4 4.4L 268cid CaterpiLLar 3114
Deutz-Allis 6265 1986-1988 4-230 Diesel
Deutz-Fahr DX3.10 1986-1988 F3L912 Diesel
Deutz-Fahr DX3.30 1986-1988 F3L912 Diesel
Deutz-Fahr DX3.50 1986-1988 F3L913 Diesel
Deutz-Fahr DX3.60 1986-1988 F4L912 Diesel
Deutz-Fahr DX3.70 1986-1988 F4L912 Diesel
Deutz-Fahr DX3.80 1986-1988 F4L913 Diesel
Deutz-Fahr DX3.90 1986-1988 F4L913 Diesel
Deutz-Fahr DX4.10 1986-1988 F4L912 Diesel
Deutz-Fahr DX4.50 1986-1988 BF4L913T Diesel
Deutz-Fahr DX4.70 1984-1988 BF4L913 Diesel
Deutz-Fahr DX6.05 1986-1988 F6L912 Diesel
Deutz-Fahr DX6.10 1986-1988 F6L912 Diesel
Deutz-Fahr DX6.30 1986-1988 F4L913 / F6L913
John Deere 240 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029DK
John Deere 240 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029TK
John Deere 250 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029DK
John Deere 250 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029TK
John Deere 260 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029TK
John Deere 260 1999-2003 L4 4.5L 275cid John Deere 4045DK
John Deere 270 1999-2003 L3 2.9L 2901cc 179cid John Deere 3029TK
John Deere 270 1999-2003 L4 4.5L 275cid John Deere 4045DK
John Deere 6100B 2010-2020 L4 4.5L 4506cc 275cid John Deere 4045TP
John Deere ML1335 2013-2016 L4 4.5L 4506cc 275cid John Deere 4045TF
Steyr 8320 1989 WD615.85, 9.7L
Volvo 244 1982-1984 L6 2.4L 2383cc Diesel
Volvo 245 1982-1984 L6 2.4L 2383cc Diesel
Volvo 740 1985-1986 L6 2.4L 2377cc Diesel
Volvo 745 1985 L6 2.4L 2383cc
Volvo 760 1983-1984 L6 2.4L 2383cc Diesel
Volvo 760 1985 L6 2.4L 2377cc Diesel

Features & Benefits

  • Precision aftermarket replacement part

  • Converts alternator-generated AC current into DC current for the vehicle charging system

  • Helps maintain proper battery charging and electrical system performance

  • Designed to provide reliable current rectification and power distribution

  • Manufactured to match original fit and function

  • Designed for dependable long-term operation

  • Ideal for alternator rebuilding and repair

  • Cross-referenced to OEM and aftermarket part numbers

What Does an Alternator Rectifier Do?

The alternator rectifier converts the alternating current (AC) produced by the alternator stator into direct current (DC) that can be used by the vehicle's electrical system and battery. It uses a series of diodes to control the direction of electrical current, allowing the alternator to provide usable DC charging output.

A properly functioning rectifier is essential for stable alternator performance and reliable battery charging. Failed or damaged rectifier diodes can reduce alternator output, create excessive AC ripple, cause intermittent charging problems, or prevent the alternator from charging properly. Replacing a faulty rectifier is an important step in restoring proper alternator operation.

Common Signs Replacement Is Needed

Replace the alternator rectifier if you notice:

  • Battery warning light illuminated

  • Battery not charging properly

  • Low or inconsistent charging output

  • Excessive AC ripple during charging system testing

  • Failed or shorted rectifier diodes

  • Intermittent charging system operation

  • Excessive heat or visible damage to the rectifier

  • Burned, damaged, or corroded stator connections

  • Rectifier failure discovered during alternator rebuilding or bench testing

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new rectifier, inspect the stator leads, rotor, voltage regulator, brushes, brush holder, slip rings, bearings, terminals, insulators, and internal wiring for signs of wear, overheating, corrosion, or damage.

Always verify the rectifier mounting configuration, terminal arrangement, stator connection points, dimensions, and electrical design before installation. Where soldering is required, use proper alternator rebuilding procedures and avoid excessive heat that could damage the rectifier or surrounding components.

After reassembly, bench-test the alternator to confirm proper charging output, diode operation, and AC ripple performance before returning the alternator to service.

While You're Rebuilding

Inspect other common wear components to help maximize charging system reliability:

Why Buy From RC Auto Electric?

RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.

Disclaimer

Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original rectifier, mounting configuration, terminal arrangement, stator connection points, dimensions, electrical specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.

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