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Alternatives to STMicroelectronics BUT30V

STMicroelectronics BUT30V and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for STMicroelectronics BUT30V

BUT30V compared against its qualified second sources
BUT30VSTMicroelectronicsESM2012DVSTMicroelectronicsESM3030DVSTMicroelectronics+1more
FFF CompatibilityIdentical ISOTOP package pin assignments (Base, Emitter, Collector, and NC) allow direct mounting on the same terminals.Same package package size, isolated structure, and screw-terminal connection interface.It is an NPN Darlington module rather than a single BJT, which results in a higher saturation voltage (1.5 V vs 0.9 V max) and slightly lower sustaining collector-emitter voltage (120 V vs 125 V).Direct physical drop-in with matching terminal placements in the identical ISOTOP casing.Identical mechanical dimensions, isolation, and screw-terminal mount style.Utilizes a Darlington design with an integrated antiparallel freewheeling diode, which increases conduction losses (Vce(sat) of 1.8 V vs 0.9 V) and alters the circuit schematic slightly, though it matches or exceeds main ratings.
AI Summary

BUT30V by STMicroelectronics: Bipolar (BJT) Transistor NPN 125 V 100 A 250 W Chassis Mount ISOTOP.

An NPN Darlington module that offers excellent current-handling capability (120 A) in the same physical ISOTOP footprint. It reduces base drive requirements due to its high gain, but introduces higher conduction losses from its Darlington architecture.

  • Higher continuous collector current handling (120 A vs 100 A)
  • Extremely high DC current gain (1200 min vs 27 typ) reducing base-drive requirements significantly
  • Direct drop-in mechanical mounting in the same ISOTOP package
  • Darlington architecture results in higher Vce(sat) saturation voltage (1.5 V vs 0.9 V), increasing conduction losses
  • Slightly lower Collector-Emitter Sustaining Voltage (120 V vs 125 V)

The ESM3030DV matches the 100 A current rating and provides vastly superior voltage ratings, with the added benefit of an integrated freewheeling diode. However, like other Darlingtons, it exhibits higher saturation voltage and conduction losses.

  • Matches the original 100 A continuous collector current rating
  • Includes an integrated ultrafast freewheeling diode across the collector-emitter junction
  • Significantly higher collector-emitter voltage ratings (300 V vs 125 V)
  • Darlington configuration yields higher saturation voltage (1.8 V vs 0.9 V) resulting in more thermal dissipation under high loads
  • Integrated freewheeling diode alters the basic schematic, though usually beneficial for inductive loads
Lifecycle StatusObsoleteObsoleteObsolete
Market AvailabilityNon-stockNon-stockDiscontinued
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