ESR and temperature — where the part shows its limits
The TPST107M004R0500: ESR is specified at 500 mOhm at 100 kHz — this is the figure that governs ripple current heating in a switching regulator output or a DC-DC input filter. A 500 mOhm ESR at 100 kHz means the self-heating at the rated ripple current is manageable for most low-power rails, but a high-frequency buck converter drawing 1 A ripple will push the internal temperature rise above the 125°C limit if derating is ignored. For a hot-side application like a base-station power module or an engine-control unit, the 125°C rated life is the ceiling — the actual lifetime doubles for every 10°C drop below that, so at 85°C ambient the expected life extends well beyond 10,000 hours.
Packaging options include Tape & Reel and Cut Tape, making it suitable for both prototype assembly and production reflow. The molded case construction gives consistent dimensional tolerance for pick-and-place.
Lifecycle and sourcing posture
Listed as Active on the manufacturer records — no last-time-buy or phase-out notice is in effect. The TPST107M004R0500 remains a current-production part, sourced through authorized distribution channels.