What the order code resolves to
The 1FK7042-5AF71-1SG5 is a 1FK7 compact synchronous servo in the Siemens servo-motor line, sitting in the Motors & Motor Controls category and the Servo Motors sub-class.

Siemens 1FK7 compact synchronous servo motor, part 1FK7042-5AF71-1SG5, 4.54 kg, lifecycle stage end-of-life.
| Parameter | Value |
|---|---|
| Weight | 4.54 kgs |
The 1FK7042-5AF71-1SG5 is a 1FK7 compact synchronous servo in the Siemens servo-motor line, sitting in the Motors & Motor Controls category and the Servo Motors sub-class.
They share the same 1FK7042 frame and family, but the suffix codes govern encoder, holding brake, shaft, and connector options — those option fields have to be matched against the existing panel before a drop-in decision is made.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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