Use the or "Translated" option. Look for the datasheet uploaded by Hitachi from 1983 – it has the clearest SOA graph.
Here’s a practical guide to understanding and using the (often labeled 2SC1124 ) transistor datasheet. c1124 transistor datasheet better
Since the 2SC1124 is largely obsolete, many "datasheets" online are scanned poorly or wrong. . If you cannot find an original NEC/Hitachi datasheet, treat it as a generic NPN RF transistor with VCEO ≥ 15V, IC ≥ 30mA, fT ≥ 400 MHz , and verify the pinout experimentally. Use the or "Translated" option
You might ask: Why not just buy old stock C1124s? IC ≥ 30mA
NPN silicon transistor Package: TO-92 (plastic) Polarity: NPN