Order this documentMOTOROLAby MJE521/DSEMICONDUCTOR TECHNICAL DATAMJE521Plastic Medium-Power NPN4 AMPERESilicon TransistorPOWER TRANSISTORNPN SILICON. . . designed for use in generalpurpose amplifier and switching circuits. Recom-40 VOLTSmended for use in 5 to 10 Watt audio amplifiers utilizing complementary symmetry40 WATTScircuitry. DC Current Gain hFE

MJE521SILICON NPN TRANSISTOR STMicroelectronics PREFERREDSALESTYPEDESCRIPTION The MJE521 is a silicon Epitaxial-Base NPNtransistor in Jedec SOT-32 plastic package.It is intended for use in 5 to 20W audio amplifiers,general purpose amplifier and switching circuits.123SOT-32INTERNAL SCHEMATIC DIAGRAMABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitVCBO Collec

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isc Silicon NPN Power Transistor MJE521DESCRIPTIONCollectorEmitter Sustaining Voltage-: V = 40 V(Min)CEO(SUS)DC Current Gain-: h = 40(Min) @ I = 1AFE CComplement to Type MJE371Minimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSDesigned for use in general-purpose amplifier andswitching circuits applications.ABSOLU

MJE521Plastic Medium-PowerNPN Silicon TransistorThese devices are designed for use in general-purpose amplifier andswitching circuits. Recommended for use in 5 to 10 Watt audioamplifiers utilizing complementary symmetry circuitry.http://onsemi.comFeatures DC Current Gain - hFE = 40 (Min) @ IC4 AMPERES= 1.0 AdcPOWER TRANSISTORS Complementary to PNP MJE371NPN SILIC

isc Silicon NPN Power Transistor MJE520DESCRIPTIONHigh Collector Current-I = 3.0ACHigh Collector-Emitter Breakdown Voltage-: V = 30V(Min)(BR)CEOGood Linearity of hFELow Saturation VoltageMinimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSDesigned for power amplifier applicationsABSOLUTE MAXIMUM RATINGS(T =25)

isc Silicon NPN Power Transistor MJE52TDESCRIPTIONCollector-Emitter Sustaining Voltage: V = 300V(Min)CEO(SUS)Minimum Lot-to-Lot variations for robust deviceperformance and reliable operationAPPLICATIONSDesigned for high voltage inverters, switching regulatorsand line operated amplifier applications. Especially wellsuited for switching power supply applicationsABSOLUT