What you need to know about using C1740 [FAQ]

The C1740 is an NPN  BJT transistor that comes in TO-92  and TO-92S packages, as well as an E-Line packaging. The TO-92  S, also known as the E-Line package, is a smaller version of the TO-92. The transistor is intended for switching, amplification, and radiofrequency applications in general.

The transistor's maximum collector current is 150 milliamperes, its maximum collector to emitter voltage is 50 volts, its maximum collector dissipation is 300 milliwatts, its minimum and maximum DC  current gain are 120 to 560 milliamperes, and its maximum transition frequency is 100MHz to 180MHz, with some manufacturers using 100MHz and others using 180MHz.

C1740 Pinout

C1740 Symbol

C1740 Footprint

• Material of Transistor: Si 

• Polarity: NPN 

• Maximum Collector  Power Dissipation  (Pc): 0.3 W

• Maximum Collector  -Base Voltage  |Vcb|: 50 V

• Maximum Emitter-Base Voltage  |Veb|: 5 V

• Maximum Collector  Current |Ic max|: 0.1 A

• Max. Operating  Junction Temperature  (Tj): 175 °C

• Transition Frequency (ft): 90 MHz

• Collector Capacitance (Cc): 2 pF

• Forward Current Transfer Ratio  (hFE), MIN: 120

• Noise Figure, dB: -

• Package-Type: TO-92.  TO-92  S/E-Line

• Collector Base Voltage  : VCBO  = 60 V

• Collector Emitter Voltage  : VCEO  = 50 V

• Emitter Base Voltage  : VEBO = 5 V

• Collector Current : IC = 150 mA

• Power Dissipation : Ptot = 300 mW

• Junction Temperature : Tj = 150°C

• Storage Temperatue : Tsg = -55 ~ +150°C

• Audio amplifier  applications

• Different types of signal amplification 

• Darlington pairs

• Switching loads up to 150mA

• Audio preamplifier applications

2SA933AS, 2SC2412K, 2SC4617, 2SC4081, 2SC5658, 2SC1852, 2SD892A, BC337

The C1740  can be utilized in a wide range of general-purpose applications, including switching, amplification, and RF. It can drive a load of up to 150mA and a maximum load voltage of 50V  when used as a switch. For many sorts of electronic signals, it can also be utilized as a preamplifier and amplifier. Aside from that, it can be used for radio frequency applications of up to 100 MHz or 180 MHz.

C1740 Package Dimensions

ROHM was established in Kyoto, Japan, in 1958. ROHM designs and manufactures semiconductors, integrated circuits and other electronic components. These components find a home in the dynamic and ever-growing wireless, computer, automotive and consumer electronics markets.