The ROHM RPT-34PB3F is a phototransistor with a peak sensitivity at 800 nm, housed in a top-view through-hole package. It is part of the RPT-34 series, designed for general-purpose optical sensing. Rated for a supply voltage up to 32 V and a switching current of 30 mA, it can drive logic inputs or small relays directly without an external transistor stage. The 72° viewing angle gives a wide detection cone, useful for diffuse-reflective or interrupted-beam setups where alignment tolerance matters.
Temperature range and deployment context
Operating temperature spans -25°C to 85°C (ambient), covering most indoor industrial and commercial environments without the need for active cooling. The through-hole package makes it a field-swappable part — no hot-air station needed, just a soldering iron and a steady hand. For a repair tech on site, that means less downtime.