Genuine Phaetus/DropEffect XG replacement thermistor for replacing a damaged hotend temperature sensor on the DropEffect XG ecosystem. The package label identifies this as the 104NT-4-R025H42G sensor assembly. Why this part Drop-in replacement for the Phaetus/DropEffect XG hotend thermistor instead of adapting a generic glass-bead sensor. Uses the Semitec 104NT-4-R025H42G 100K NTC thermistor family: 100 kΩ at 25°C, B25/85 4267 K, ±3% resistance tolerance, ±2% B-value tolerance. High-temperature glass NTC element rated by Semitec for an operating range of -50°C to 300°C. Specifications Brand: Phaetus / DropEffect Marked type / MPN: 104NT-4-R025H42G Sensor type: 100K NTC thermistor, Semitec NT-4 family Resistance: 100 kΩ at 25°C B value: 4267 K, B25/85 Connector note: package label shows Molex 3.0 Use: replacement hotend thermistor for Phaetus/DropEffect XG-style installations Fitment and setup Use this when the original XG thermistor is damaged or reading incorrectly. If you are refreshing the same toolhead, pair it with nozzles for the Phaetus/DropEffect XG hotend. Gotchas This is not a PT1000 sensor; do not configure firmware as PT1000. This is not a generic 3950 thermistor; use the matching Semitec 104NT-4 / 104NT table for accurate temperature readings. Confirm connector and mounting style against your hotend before installing, especially if you are adapting it outside the DropEffect XG ecosystem. “It worked flawlessly in my Rapido 2.0.”
