Substitutions for this unit: WE #’s: 46425 – CS121 Self Excited Version / 46360 – 10SI, 42 AMP, Self Excited, Vset 13.2 Volts / 46457 – 12SI, 42 AMP, Self Excited, with {r} pin terminal / 46373 – 12SI, 72 AMP, Self Excited, with {r} pin terminal / 46372 – 12SI, 100 AMP, Self Excited, with {r} pin terminal / 46350 – 10DN, 42 AMP, Self Excited / 46346 – 10SI, 42 AMP, Self Excited, Sealed end frames / 46347 – 10SI, 61 AMP, Self Excited, Sealed end frames / 46925 – 10SI, 42 AMP, Self Excited, Positive Ground / 46926 – CS130, 85 AMP, Self Excited, Positive Ground, 6 Volt / 59303 – CS130, 85 AMP, Self Excited, Chrome Frames / 59301 – 10SI, 63 AMP, Chrome Version / 46975 – cs130, 63 AMP, 1/2in 1V Pulley / 46968 – 10SI, 63 AMP, Self Excited, with mechanical tach / 53781 – 10SI, 42 AMP, Self Excited / 53000 – 10SI, 63 AMP, Self Excited, Sweeping Brush Holder / 53669 – 176mm Height / 53820 – 10SI, 63 AMP, Self Excited / 46331 – CS130, 85 AMP, 2V Pulley, 50-012435 converts to 10SI plug. Call to confirm fitment