The TPSE157K016R0050V: The 50 mOhm ESR at 100 kHz keeps ripple heating under control in power-supply output filters and point-of-load decoupling — the low impedance shunts high-frequency switching noise before it reaches downstream logic. The ±10% tolerance is the standard production band; tighter bins are not listed for this order code.
In a 85°C ambient the lifetime derates significantly upward — the 2000-hour figure is the worst-case endurance at the temperature ceiling, not the expected service life in a typical enclosure.