2N4870, PN Unijunction Transistor, TO-92

The 2N4870 is a PN unijunction transistor designed for use in pulse and timing circuits, sensing circuits, and thyristor trigger circuits. It operates with an emitter reverse voltage (V_B2E) of up to 30 V and an interbase voltage (V_B2B1) of up to 35 V. The device can handle an RMS emitter current (I_e) of 50 mA and a peak pulse emitter current (i_e) of 1.5 A, making it suitable for applications requiring precise control and timing. The 2N4870's intrinsic standoff ratio and interbase resistance parameters make it ideal for use in oscillators and other timing-related applications.

• Intrinsic Standoff Ratio: Offers an intrinsic standoff ratio (η) ranging from 0.56 to 0.75, facilitating precise triggering in timing circuits.
• Interbase Resistance: Features an interbase resistance (R_BB) between 4.0 kΩ and 9.1 kΩ, ensuring stable operation across various applications.
• Low Emitter Saturation Voltage: Exhibits an emitter saturation voltage (V_EB1(sat)) of approximately 2.5 V at an emitter current of 50 mA, enhancing efficiency.
• Compact TO-92 Package: Encased in a standard TO-92 package, allowing for easy integration into various circuit designs.
• Wide Operating Voltage Range: upports an emitter reverse voltage up to 30V and an interbase voltage up to 35V, ensuring versatility in circuit design.
• `Stable Performance Across Temperature Variations: Capable of operating in a wide temperature range from -55°C to +125°C, ensuring reliable functionality in extreme environments.