TECHNICAL DATA POWER TRANSISTOR Silicon n-p-n type used in a wide variety of high-power switching and ( aroplifier applications in industrial and 2 NI 48 8 military equipment. It is used in power E B switching, de-to-de converter, inverter, chopper, solenoid and relay control circuits; in oscillator, regulator, and pulse-amplifier circuits; and as a class A or class B push-pull audio and servo amplifier. It features low saturation resistance, high current and power clissipation, high beta at high current, and excellent high- temperature performance. Package is similar to JEDEC No. TO-3; outline 23, Outlines Section. This type is identical with type 2N1490 except for the following: CHARACTERISTICS in Common-Emitter Circuit DC Forward Current-Transfer Ratio (with collector-to-emitter volts = 4 and collector amperes = 1.5) be eee eet e eee eee 15 to 45 DC Collector-to-Emitter Saturation Resistance (with collector amperes = 1.5 and base ma = 300)........ 0c ccc cee cece erent teres 2 max ohms POWER TRANSISTOR Silicon n-p-n type used in a wide variety of high-power switching and ( amplifier applications in industrial and 2 Ni 48 9 military equipment. It is used in power E B switching, dc-to-de converter, inverter, chopper, solenoid and relay control circuits; in oscillator, regulator, and pulse-amplifier circuits; and as a class A or class B push-pull audio and servo amplifier. It features low saturation resistance, high current and power dissipation, high beta at high current, and excellent high- temperature performance. Package is similar to JADEC No. TO-8; outline 23, Outlines Section. This type is identical with type 2N1490 except for the following: MAXIMUM RATINGS COLLECTOR-TO-BASE VOLTAGE (with emitter open)...........2+ccccerene 60 max volts COLLECTOR-TO-EMITTER VOLTAGE! With emitter-to-base volts == LB... 0... cece eee eee teen eens 60 max volts With base open.............-.-005 weeeeeee Dee teeee ecw eee e ees 40 max voits CHARACTERISTICS Collector-to-Emitter Breakdown Voltage (with emitter-to-base volts = 1.5 and collector ma == 0.5). 0.00.00... cece cee eee eens 60 min volts Collector-to-Emitter Sustaining Voltage (with collector ma = 100 and base current = 0)... 0.0... cece cect erent eeeneeceeers . 40 min volts POWER TRANSISTOR Silicon n-p-n type used in a wide variety of high-power switching and amplifier applications in industrial and 2 Ni 490 military equipment. It is used in power switching, dc-to-de converter, inverter, chopper, solenoid and relay control circuits; in oscillator, regulator, and pulse-amplifier circuits; and as a class A or 219