Because of the --r suffix, the diagram is :

Medium voltage devices often have a derating factor above 1000 m altitude or for switching frequencies >4 kHz. The diagram may contain a secondary Y-axis or a small table. For the pbm27a-210-mv, expect a 1% torque reduction per 100 m above 2000 m altitude.

The pbm27a-210-mv--r configuration is not a toy servo. It appears in:

: Constructed with stainless steel and high-level ingress protection (IP68/IP69K), making it suitable for environments requiring intensive cleaning.