2SB1731 is a low frequency amplifier tube produced by ROHM company. It has the characteristics of large collector current, and its maximum collector current can reach 1A, and the minimum collector-emitter saturation voltage is -370mV. It is suitable for low frequency amplifier and other occasions.
The 2SB1731 is a low‑frequency amplifier transistor offered by ROHM. It features a large collector current capability and a collector‑emitter saturation voltage of ≤ ‑370 mV at IC = ‑1 A and IB = ‑50 mA.
The document provides absolute maximum ratings, packaging details, electrical characteristics, and a series of characteristic curves covering current gain, saturation voltages, transition frequency and switching times. An appendix notes usage restrictions for safety‑critical equipment and export control information.
| Collector‑emitter saturation voltage (VCE(sat)) | ≤ ‑370 mV at IC = ‑1 A / IB = ‑50 mA |
|---|---|
| DC current gain (hFE) | 270 – 680 |
| Collector‑base voltage rating (VCB) | ‑30 V |
| Collector‑emitter voltage rating (VCE) | ‑2 V |
| Maximum collector current | Large (no explicit limit given) |
The saturation voltage is ≤ ‑370 mV at IC = ‑1 A and IB = ‑50 mA.
The DC current gain ranges from 270 to 680.
The device is rated for a collector‑base voltage of –30 V.
The document advises consulting a ROHM sales representative before using the device in equipment where failure could endanger human life.