Sourcing reality
The VW3A16703: Marked obsolete by the manufacturer.
68 Ohm resistance sets the braking torque curve for a specific drive model — mismatch here means the DC bus may not dump energy fast enough on decel, or the resistor draws more current than the chopper transistor can handle. 120 W continuous power is the resistor's steady-state dissipation limit; peak braking power is typically several times higher for short duty cycles, so the resistor can absorb transient energy well above this figure as long as the RMS stays under 120 W.
Designed as a braking resistor for Schneider drives, mounted inside a control cabinet where the IP30 rating is sufficient and the enclosure provides additional mechanical protection.