SST43D2120是日本信浓42步进电机，外径尺寸42mm小尺寸大力矩。
SST43D系列信浓步进电机其它型号：
SST43D1040 SST43D1041 SST43D104X SST43D1060 SST43D1061 SST43D106X SST43D1080 SST43D1081 SST43D108X SST43D1100 SST43D1101 SST43D110X SST43D1120 SST43D1121 SST43D112X SST43D1150 SST43D1151 SST43D115X SST43D2040 SST43D2041 SST43D204X SST43D2060 SST43D2061 SST43D206X SST43D2080 SST43D2081 SST43D208X SST43D2100 SST43D2101 SST43D210X SST43D2120 SST43D2121 SST43D212X SST43D2140 SST43D2141 SST43D214X SST43D2160 SST43D2161 SST43D216X
STP-43D1098-01 STP-43D2063 STP-43D2068-01 STP-43D2068-02 STP-43D2068 STP-43D2137 STP-43D3056 STP-45D1011 STP-45D1014
STP-42D2188 STP-42D2154-02 STP-42D4042 STP-42D2172 STP-42D1134 STP-42D4054
STP-43D1082 STP-43D1098 STP-43D2035 STP-43D2035-01 STP-43D2116 STP-43D2125 STP-43D3031 STP-43D3056 STP-45D1021