0.4 kW continuous, 1.27 Nm stall
The Siemens 1FL2103-4AG10-0SC0 is a SIMOTICS S-1FL2 low-inertia servomotor rated 0.4 kW continuous (Pn) at 3000 rpm nominal speed, with stall torque M0 equal to rated torque Mn at 1.27 Nm — meaning the motor delivers full nominal torque down to zero speed without a torque fold-back region, which is the operating profile motion axes need for holding-position and accel/decel duty. It is wound for a 200 V three-phase supply and is intended exclusively as the motor half of a SINAMICS S200 drive package — the encoder, brake, and connector are matched to that controller, so substitution outside the S200 system requires verifying the drive-side compatibility list rather than treating the motor as a standalone drop-in.
Mechanical package: 30 mm shaft height, brake, IP54
The motor carries a 30 mm shaft height, ships with an integrated holding brake for vertical-axis and load-holding duty, and uses a plain shaft with N tolerance — meaning the mating coupling or pinion must accept a standard keyed or keyless bore without a special slip-fit allowance. Protection class is IP54 without an oil seal, so the motor is suitable for typical industrial cabinet-internal mounting but not for washdown or food-grade zones where an oil-sealed IP65 or IP67 variant from the 1FL2 family would be specified instead. Feedback is a 21-bit absolute singleturn encoder (AS) terminated through a hybrid connector — the connector type, not just the encoder protocol, is what locks the motor to the S200 cable set, so any field replacement should match the connector variant on the order code suffix.
Built-to-order class and lead-time reality
The part carries product class C — products manufactured or produced to order that cannot be reused, re-utilized, or returned against credit — which means procurement should plan for factory lead time rather than distributor shelf stock, and spares policy should account for that built-to-order posture.