Aftermarket Iskra Voltage Regulator IK401

• 12885, 13055, 13056, 13094, 13129, 13225, 13421, 14048, 14390, 14410, 20598, 20695, 20790, 22208

• Alfa Romeo AT050600108; BMW 12-31-1-352-708; Case 3218544EX, 3218544R91; Claas 6005706652, 6854980; Delco 3472223, 3493304, 3493604; Fendt G345900011010, X830060020, X830060022; Fiat 4479063, 46231726, 46231750, 46231761, 5962645, 5991834, 5991942, 7547660, 77513411, 77515410; Hatz 50366500; KHD 1162339, 1163752, 1163753, 1171638; Letrika (Iskra) 11.201.071, 11.201.230, 11.201.405, 11.201.405, 11.201.432, 11.201.448, 11.201.735, 11.201.914; Letrika (Iskra) Tech. AAK1117, AAK1118, AAK1119, AAK1131, AAK1137, AAK1143, AAK1144, AAK1148, AAK1151, AAK1152, AAK1157, AAK1163, AAK1172, AAK1175, AAK1181, AAK1182, AAK1183, AAK1185, AAK1193, AAK1370, AAK3130, AAK3321, AAK3529, AAK3529, AAK3538, AAK3547, AAK3553, AAK3555, AAK3586, AAK4141, AAK4143, AAK4580; Letrika Old IA 0143, IA 0606; Lombardini 11572690; Magneton 9-513-031, 9-515-010, 9-515-031, 9-515-081, 9-515-190, 9-515-491, 9-516-381, 9-516-693, 9-516-714, 9-516-714; MAN 81-26101-6039; Marelli 943321013, 943321015, 943356502, 943356701, MAR485, MAR592; Opel 1204006, 1204007, 1204015, 1204088, 1204095, 1204132, 1204149, 1204174, 1204175, 1204191, 1204337, 1204343; Prestolite 66021414, 66021637; Steyr 61000090072; Valeo 2522976, 2940353, 2940526, 433002, 433054, 436149, 436269; Vauxhall R1030031, R1030034

Features & Benefits

• Precision aftermarket replacement part

• Regulates alternator output voltage

• Helps maintain proper battery charging

• Supports stable charging system performance

• Manufactured to match original specifications

• Designed for dependable long-term operation

• Ideal for alternator rebuilding and repair

• Cross-referenced to OEM and aftermarket part numbers

What Does a Voltage Regulator Do?

The voltage regulator controls the alternator's output by regulating current supplied to the rotor field winding. As electrical demand changes, the regulator continuously adjusts field current to maintain the proper charging voltage for the battery and the vehicle's electrical system.

A properly functioning voltage regulator helps prevent battery overcharging and undercharging while protecting sensitive electrical components from excessive voltage. Because charging system performance depends on the interaction between the regulator, rotor, stator, rectifier, and battery, replacing a faulty regulator is an important step in restoring alternator performance.

Common Signs Replacement Is Needed

Replace the voltage regulator if you notice:

• Battery overcharging

• Battery not charging

• Low charging voltage

• High charging voltage

• Battery warning light illuminated

• Intermittent charging problems

• Headlights that brighten or dim with engine speed

• Charging system failure during testing

• Voltage regulator failure discovered during alternator rebuilding

Installation Recommendations

Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new regulator, inspect the brushes, brush holder, slip rings, rotor, stator, rectifier, wiring, and electrical connections for signs of wear or damage.

Always verify connector configuration and mounting style before installation. After assembly, bench-test the alternator to confirm proper charging voltage and overall charging system performance.

While You're Rebuilding

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

• Bearings

• Brushes

• Brush Holder

• Slip Rings

• Rectifier

• Diodes

• Rotor

• Clutch Pulley

• Insulators

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 part, connector configuration, mounting style, voltage specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.