BU941PFI

TRANSISTOR NPN DARLINGTON 400V 15A ISOWATT218

BU941PFI is an NPN Darlington high-voltage ignition coil driver transistor with 500V VCEO and 15A IC, in ISOWATT218 package, featuring an integrated antiparallel diode for high ruggedness electronic ignitions.Checked against the datasheet

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Technical parameters

Datasheet-verified parameters

22 items

Parameter	Value and test conditions	Source
Package	ISOWATT218
Max. Operating Junction Temperature	175 °C
Storage Temperature	-65 to 175 °C
Collector-Emitter Voltage (VBE=0)	500 V
Collector-Emitter Voltage (IB=0)	400 V
Emitter-Base Voltage (IC=0)	5 V
Collector Current	15 A
Collector Peak Current	30 A
Base Current	1 A
Base Peak Current	5 A
Total Dissipation at Tc=25°C	65 W
Collector Cut-off Current (VBE=0)	Max 100 μA (VCE=500 V, Tj=25°C); Max 0.5 mA (VCE=500 V, Tj=125°C)
Collector Cut-off Current (IB=0)	Max 100 μA (VCE=450 V, Tj=25°C); Max 0.5 mA (VCE=450 V, Tj=125°C)
Emitter Cut-off Current (IC=0)	Max 20 mA (VEB=5 V)
Collector-Emitter Sustaining Voltage (IB=0)	Min 400 V (IC=100 mA, L=10 mH, VClamp=400 V)
Collector-Emitter Saturation Voltage	Max 1.6 V (IC=8 A, IB=100 mA); Max 1.8 V (IC=10 A, IB=250 mA); Max 2 V (IC=12 A, IB=300 mA)
Base-Emitter Saturation Voltage	Max 2.2 V (IC=8 A, IB=100 mA); Max 2.5 V (IC=10 A, IB=250 mA); Max 2.7 V (IC=12 A, IB=300 mA)
DC Current Gain	Min 300 (IC=5 A, VCE=10 V)
Diode Forward Voltage	Max 2.5 V (IF=10 A)
Functional Test Current	Min 10 A (VCC=24 V, VClamp=400 V, VL=7 mH)
Inductive Load Storage Time	Typ 15 μs (VCC=12 V, VClamp=300 V, L=7 mH, IC=7 A)
Inductive Load Fall Time	Typ 0.5 μs (VCC=12 V, VClamp=300 V, L=7 mH, IC=7 A)

All parameters (8)ExpandCollapse

Environment and package
Package	ISOWATT218
Rthj-case	2.3 °C/W (Max)
Other
IC	15 A
ICM	30 A
Ptot	65 W
Tj	175 °C
Tstg	-65 to 175 °C
VCEO	400 V

Pinout and package

PackageISOWATT218

Pin	Name	Function	Source
1		Base
2		Emitter
3		Collector

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DatasheetDatasheet · 178.3 KB · 2026-10-29

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