Specifications
| Type | Description |
|---|---|
| Part Number | XL-PD638B |
| Manufacturer | XINGLIGHT |
| Product Type | SMD LED |
| Category | LED |
| Outline Dimensions | 7.6 x 5.25 x 2.75 mm; L/W/H; source page 1 |
| Optical Type | Infrared receiver; black colloid; source page 1 |
| RoHS Compliance | Complied with RoHS Directive; environmental protection process; source page 1 |
| Moisture Sensitivity Level | MSL 3; moisture sensitivity level; source page 1 |
| Packaging Standard | EIA standard packaging; standard packaging; source page 1 |
| Power Consumption | 150 mW max; maximum rating; source page 3 |
| Reverse Voltage | 32 V max; maximum rating; source page 3 |
| Operating Ambient Temperature | -40°C to +85°C; Topr; source page 3 |
| Storage Ambient Temperature | -40°C to +85°C; Tstg; source page 3 |
| Welding Conditions | 260°C max for <=6 s; Tsol; source page 3 |
| Open-Circuit Voltage | 0.35 V typ; λP=940 nm, Ee=5 mW/cm², Ta=25°C; source page 4 |
| Short-Circuit Current | 18 μA typ; λP=940 nm, Ee=1 mW/cm², Ta=25°C; source page 4 |
| Reverse Light Current | 15 μA min, 25 μA typ; λP=940 nm, VR=5 V, Ee=1 mW/cm², Ta=25°C; source page 4 |
| Reverse Dark Current | 5 nA typ, 30 nA max; VR=10 V, Ee=0 mW/cm², Ta=25°C; source page 4 |
| Rise Time | 50 μs typ; VR=10 V, RL=1000 Ω, Ta=25°C; source page 4 |
| Fall Time | 50 μs typ; VR=10 V, RL=1000 Ω, Ta=25°C; source page 4 |
| Reverse Breakdown Voltage | 32 V min, 170 V typ; Ee=0 mW/cm², IR=100 μA, Ta=25°C; source page 4 |
| Total Capacitance | 25 pF typ; Ee=0 mW/cm², VR=5 V, f=1 MHz, Ta=25°C; source page 4 |
| Spectral Bandwidth Range | 840 nm min, 1100 nm max; λ0.5, Ta=25°C; source page 4 |
| Peak Sensitivity Wavelength | 940 nm typ; λP, Ta=25°C; source page 4 |
| Rank BIN1 Reverse Light Current | 10.2 to 16.5 μA; IL, Ee=1 mW/cm², VR=5 V, λP=940 nm; source page 4 |
| Rank BIN2 Reverse Light Current | 13.5 to 22.0 μA; IL, Ee=1 mW/cm², VR=5 V, λP=940 nm; source page 4 |
| Rank BIN3 Reverse Light Current | 18.0 to 27.5 μA; IL, Ee=1 mW/cm², VR=5 V, λP=940 nm; source page 4 |
| Rank BIN4 Reverse Light Current | 22.5 to 33.0 μA; IL, Ee=1 mW/cm², VR=5 V, λP=940 nm; source page 4 |
| Dimensional Tolerance | ±0.30 mm; unless otherwise specified; source page 6 |
| Recommended Maximum Wave Soldering Temperature | 240°C for 6 s; recommended product maximum soldering temperature; source page 8 |
| Manual Soldering Iron Temperature | <300°C for <=3 s; each terminal, soldering iron capacity <25 W; source page 9 |
| Storage Condition | Temperature <=30°C, relative humidity <=70%; recommended storage environment; source page 10 |
| Recommended Original Package Storage Duration | <=3 months; use in original box; source page 10 |
| Ethanol Cleaning Time | <=3 minutes; room temperature wiping or soaking; source page 10 |
| Lead Bending Distance | >=2 mm from colloid; bracket/lead forming; source page 10 |
| Datasheet Status | request_only |
Product Overview
The XL-PD638B from XINGLIGHT is an infrared receiver photodiode categorized under LED components. It uses a black colloid package with outline dimensions of 7.6 x 5.25 x 2.75 mm and a general dimensional tolerance of ±0.30 mm unless otherwise specified.
Optical and electrical data are centered on infrared reception at 940 nm. The datasheet lists an 840 nm to 1100 nm spectral bandwidth range, 0.35 V typical open-circuit voltage, 18 μA typical short-circuit current, 15 μA minimum and 25 μA typical reverse light current, and 5 nA typical reverse dark current. Switching characteristics include 50 μs typical rise time and 50 μs typical fall time under the stated test circuit.
Assembly limits include 260°C maximum welding for up to 6 seconds, a recommended wave soldering limit of 240°C for 6 seconds, and manual soldering below 300°C for up to 3 seconds per terminal. The part is RoHS compliant, rated MSL 3, and supplied using EIA standard packaging.
Key Features
- Infrared receiver photodiode with black colloid optical package
- 7.6 x 5.25 x 2.75 mm outline dimensions
- Peak sensitivity wavelength specified at 940 nm typical
- Spectral bandwidth range from 840 nm to 1100 nm
- Reverse light current rated 15 μA minimum, 25 μA typical
- Reverse dark current rated 5 nA typical, 30 nA maximum
- Rise and fall times both specified at 50 μs typical
- Reverse breakdown voltage rated 32 V minimum, 170 V typical
- Operating ambient temperature range from -40°C to +85°C
- RoHS compliant with MSL 3 moisture sensitivity level
Typical Applications
- Infrared receiver circuits
- 940 nm light detection
- Optical sensing inputs
- Proximity sensing circuits
- IR beam detection
- Ambient infrared monitoring
- Photodiode signal detection
Procurement Notes
When requesting a quote for XL-PD638B, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For LED and optoelectronic sourcing, brightness bin, wavelength or color temperature bin, forward voltage range, viewing angle, moisture sensitivity level and soldering process limits may affect final selection, availability and lead time.
Related Technical Articles
FAQ
What type of device is the XL-PD638B?
The XL-PD638B is an infrared receiver photodiode from XINGLIGHT. It is categorized as an LED component and uses a black colloid package with outline dimensions of 7.6 x 5.25 x 2.75 mm.
What wavelength range does the XL-PD638B cover?
The datasheet specifies a spectral bandwidth range from 840 nm minimum to 1100 nm maximum at Ta=25°C, with a typical peak sensitivity wavelength of 940 nm.
What are the main current ratings for this photodiode?
At λP=940 nm, VR=5 V, Ee=1 mW/cm², and Ta=25°C, reverse light current is specified as 15 μA minimum and 25 μA typical. Reverse dark current is 5 nA typical and 30 nA maximum at VR=10 V.
What soldering limits apply to the XL-PD638B?
The maximum welding condition is 260°C for up to 6 seconds. The recommended maximum wave soldering temperature is 240°C for 6 seconds, and manual soldering should be below 300°C for up to 3 seconds per terminal.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.