BPW21R VISHAY Photodiodes

The BPW21R from Vishay is a planar silicon PN photodiode in a hermetically sealed TO‑5 package primarily designed for high‑precision linear light‑sensing applications. For selection, a 565 nm peak wavelength matched to the human eye, a 420–675 nm spectral range, a 9 nA/lx typical sensitivity, low 2 nA dark current, ±50° half‑sensitivity angle, and a 7.5 mm² active area over ‑40 °C to +125 °C are the defining parameters; the built‑in colour‑correction filter and seven‑decade linear short‑circuit photocurrent response further suit it to exposure and colour measurement instruments. In application, it serves as the sensing element in photography light meters, laboratory photometers, spectrophotometers, colour analysers, camera exposure controls, medical diagnostic instruments, and industrial inspection equipment that demand stable, calibrated visible‑light detection with minimal drift. In stock at HL Electronics – request a quote for fast delivery.