The XL-PD15-21B-TR is a surface-mount infrared photodiode (PD) with a 3215 package (3.2×1.5×1.0mm). It uses black epoxy (effectively filtering out visible light interference), has a peak sensitivity wavelength of 940nm, and a sensitivity range of 700~1100nm. This device is a photosensitive diode (not a photosensitive transistor), and its output photocurrent changes linearly with the intensity of received infrared radiation. It's suitable for SMT reflow soldering, meets ROHS environmental standards, and has a moisture sensitivity level of MSL 3. Paired with the 3215 infrared emitter of the same series (XL-IR15-21CTR), it forms a complete photoelectric through-beam/reflection detection solution, making it an ideal receiver for applications like photoelectric switches, light barriers, and smoke detection.
Optical Performance:
Peak Responsivity Wavelength (λP): 940nm
Responsivity Wavelength Range (λ1/2): 700~1100nm (covers mainstream infrared bands and is compatible with both 940nm and 850nm emitters)
Photocurrent (IL): 0.2~0.9μA (λP=940nm, VR=5V, Ee=1mW/cm?, see datasheet for detailed grading)
Open-Circuit Voltage (VOC): Typical 0.42V (Ee=5mW/cm?)
Dark Current (ID): ≤10nA (VR=10V, no light, low dark current ensures high signal-to-noise ratio)
Electrical Parameters (Ta=25℃):
Maximum Power Consumption (PC): 150mW
Maximum Reverse Voltage (VR): 32V
Reverse Breakdown Voltage (BVR): ≥32V (IR=100μA, no light)
Operating Temperature: -20℃~85℃
Storage Temperature: -40℃~85℃
Soldering Conditions: Reflow soldering 260℃ ≤6s, Hand soldering 300℃ ≤3s
Environment & Reliability:
Passed 1000-hour operational lifetime, high temperature & humidity, and thermal cycling reliability tests (see page 7 of datasheet)
Supports photocurrent grading (IB-1 grade: 0.2~1.0μA) for easier batch consistency selection
Others:
Black colloidal packaging effectively blocks ambient visible light interference, improving signal-to-noise ratio
Packaged in EIA standard tape-and-reel, suitable for high-speed SMT placement
Moisture-proof and anti-static sealed packaging; recommended to use within 7 days after opening
Smart products and home appliances: iris recognition, smart door locks, proximity sensing
Infrared emitting miniature light barrier: object detection, position sensing, counting
Floppy disk drive: disk rotation detection, write protection detection
Photoelectric switch: industrial automation, security detection
Smoke detector: photoelectric smoke alarm (used with infrared emitter)
Infrared sensor: pyroelectric infrared (PIR) support, infrared communication reception
Induction switch: automatic faucets, automatic doors, smart lighting
