MMBT491A

MMBT491A NPN Silicon Epitaxial Planar Transistor SOT-23 Plastic Package Absolute Maximum Ratings (Ta = 25 OC) Parameter Collector Base Voltage Collector Emitter Voltage Emitter Base Voltage Collector Current Peak Pulse Current Power Dissipation Junction Temperature Storage Temperature Range Symbol VCBO VCEO VEBO IC ICM Ptot TJ TS Value 40 40 5 1 2 200 150 - 55 to + 150 Unit V V V A A mW O C C O Characteristics at Ta = 25 OC Parameter DC Current Gain at VCE = 5 V, IC = 1 mA at VCE = 5 V, IC = 500 mA at VCE = 5 V, IC = 1 A Collector Base Cutoff Current at VCB = 30 V Collector Emitter Cutoff Current at VCE = 30 V Emitter Base Cutoff Current at VEB = 4 V Collector Emitter Saturation Voltage at IC = 500 mA, IB = 50 mA at IC = 1 A, IB = 100 mA Base Emitter Saturation Voltage at IC = 1 A, IB = 100 mA Base Emitter Voltage at IC = 1 A, VCE = 5 V Collector Output Capacitance at VCB = 10 V, f = 1 MHz Gain Bandwidth Product at VCE = 10 V, IC = 50 mA, f = 100 MHz Symbol hFE hFE hFE ICBO ICES IEBO VCEsat VBEsat VBE Cob fT Min. 300 300 200 150 Max. 900 100 100 100 0.3 0.5 1.2 1.1 10 Unit nA nA nA V V V pF MHz SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) ® Dated : 10/09/2008 MMBT491A SEMTECH ELECTRONICS LTD. (Subsidiary of Sino-Tech International Holdings Limited, a company listed on the Hong Kong Stock Exchange, Stock Code: 724) ® Dated : 10/09/2008