The **2SB710A-R** is a silicon PNP epitaxial planar transistor, primarily used for low-frequency power amplification and switching applications. It is often paired with the **2SD601A** (its NPN complement). --- ### 1. Key Specifications The following table summarizes the absolute maximum ratings and electrical characteristics of the 2SB710A-R: | Parameter | Symbol | Rating/Value | | :--- | :--- | :--- | | **Type** | PNP | Silicon | | **Package** | Mini-Type (SOT-23 / SC-59) | 3-pin SMD | | **Collector-Base Voltage** | $V_{CBO}$ | -60 V | | **Collector-Emitter Voltage** | $V_{CEO}$ | -50 V | | **Emitter-Base Voltage** | $V_{EBO}$ | -7 V | | **Collector Current** | $I_C$ | -500 mA | | **Power Dissipation** | $P_C$ | 200 mW | | **DC Current Gain ($h_{FE}$)** | $h_{FE}$ | 210 to 340 (R Rank) | | **Transition Frequency** | $f_T$ | 120 MHz (Typ) | --- ### 2. Pin Configuration The device is typically packaged in an SOT-23 format. The standard pinout is as follows: 1. **Base (B)**: Controls the current flow between Emitter and Collector. 2. **Emitter (E)**: Usually connected to the positive rail in a PNP circuit. 3. **Collector (C)**: Connected to the load. --- ### 3. Features & Classification * **High Collector Current:** With a limit of -500mA, it is capable of driving small relays, LEDs, and small motors. * **R-Rank Classification:** The "R" suffix specifically denotes the DC current gain ($h_{FE}$) range. For this specific part, it falls between **210 and 340**. * **Complementary Pair:** Often used alongside the **2SD601A** for push-pull amplifier stages. * **Small Footprint:** The Mini-type package makes it ideal for high-density surface mount (SMT) designs. --- ### 4. Typical Applications * **Switching:** Used as a digital switch to turn loads on/off in battery-powered devices. * **Amplification:** Low-frequency voltage or current amplification in audio pre-amps. * **Driver Circuits:** Driving indicators or small solenoids in consumer electronics. ---