Overview

The 2SCR502EBTL from Rohm Semiconductor is an RF bipolar junction transistor (BJT) designed for high-frequency small-signal amplification and switching. As an RF transistor, it is typically used in the front end of communication circuits, low-power RF stages, local oscillators, and wideband amplifiers where low noise, reasonable gain, and stable performance over frequency are important. It is supplied in a compact surface-mount package, making it suitable for dense PCBs and portable equipment. Typical operation is at low to medium voltages and currents, consistent with RF and general small-signal use in consumer, industrial, and communication systems. For exact ratings such as V_CEO, I_C, transition frequency (f_T), and gain (h_FE), the Rohm datasheet should be consulted before design-in.

Applications

• Low-power RF amplifiers in ISM band and sub-GHz wireless modules
• High-frequency signal buffering and gain stages in communication equipment
• Oscillator and mixer stages in RF front-end circuits
• General-purpose small-signal amplification in consumer electronics
• Driver and level-shifting stages in industrial control and instrumentation
• Test and measurement circuits where stable high-frequency behavior is required

Alternatives & Replacement

Depending on availability, lifecycle status, and exact circuit requirements, it may be necessary to consider alternative RF or small-signal BJTs as replacements for the 2SCR502EBTL. When selecting a substitute, closely compare maximum voltage and current ratings, transition frequency, gain, noise performance, and package style.

Recommended alternatives:

• DTC124EU3T106 – Rohm Semiconductor (Redesign Required)
• BC847CWT1 – ON Semiconductor (Redesign Required)
• MMBT3904Q-7-F – Diodes Incorporated (Redesign Required)
• S8050 – MDD (Redesign Required)
• SS8050 – MDD (Redesign Required)
• BC817-16 – Infineon Technologies (Redesign Required)
• MMBT4401 – Fairchild/ON Semiconductor (Redesign Required)
• PMBT2907A – NXP / Nexperia (Redesign Required)
• PMBT2222A – NXP / Nexperia (Redesign Required)
• BC847C – NXP / Nexperia (Redesign Required)

Engineering note: none of the listed alternatives are guaranteed drop-in replacements. Before committing to production, verify pinout, package footprint, polarity, maximum ratings (V_CEO, I_C, P_tot), RF performance (f_T, gain, noise), and timing characteristics against the original 2SCR502EBTL datasheet, and perform bench validation in the target circuit.