Photodiode identity and peak sensitivity
The RPMD-0132 is a 940 nm photodiode from ROHM Semiconductor, housed in a 3SMD surface-mount package. The 940 nm peak wavelength aligns with the emission of common IR LEDs, making it a natural pairing for optical sensing and proximity detection in industrial and consumer systems.
Supply voltage and dark current floor
Rated for a 15 V supply, the photodiode requires a reverse bias to operate in photoconductive mode — the 15 V rail sets the depletion width and response speed. The 1 nA dark current defines the noise floor in zero-light conditions; for a system measuring low-level IR signals, this leakage sets the minimum detectable photocurrent and the SNR budget at the transimpedance amplifier.
Temperature grade and deployment context
Specified for -25°C to 85°C operation, the RPMD-0132 covers the industrial temperature band — suitable for outdoor sensor nodes, HVAC duct monitoring, and factory-floor optical barriers that see seasonal ambient swings. The surface-mount 3SMD package supports reflow assembly and fits into compact PCB layouts without through-hole clearance.