Specifications
| Type | Description |
|---|---|
| Part Number | XL851S-G |
| Manufacturer | XINGLIGHT |
| Product Type | SMD LED |
| Category | LED |
| Package Case | SMD4; package outline dimensions referenced in mm but numeric dimensions not provided in extracted text |
| Product Series | XL851 |
| Package Type | SMD4 |
| Shipping Quantity | 2000 pcs/Tape & Reel |
| Marking Code | XL851 |
| Current Transfer Ratio | 50-600 % at IF=5 mA, VCE=5 V |
| Isolation Voltage | 5000 Vrms at 40-60% RH, AC for 1 minute |
| Collector-Emitter Breakdown Voltage | >=350 V at IC=0.1 mA, IF=0 |
| Operating Temperature | -55 to +100 °C, maximum ratings |
| Forward Current | 60 mA at TA=25°C unless otherwise specified |
| Input Reverse Voltage | 6 V at TA=25°C unless otherwise specified |
| Input Power Dissipation | 100 mW at TA=25°C unless otherwise specified |
| Power Dissipation Reduction Factor | 2.9 mW/°C, pulse width <=1 us, duty ratio 0.001 |
| Collector Power Dissipation | 150 mW at TA=25°C unless otherwise specified |
| Output Collector Current | 50 mA at TA=25°C unless otherwise specified |
| Collector-Emitter Voltage | 350 V at TA=25°C unless otherwise specified |
| Emitter-Collector Voltage | 7 V at TA=25°C unless otherwise specified |
| Total Power Dissipation | 200 mW at TA=25°C unless otherwise specified |
| Storage Temperature Range | -55 to +125 °C, maximum ratings |
| Soldering Temperature | 260 °C for 10 seconds |
| Forward Voltage | typ 1.2 V, max 1.4 V at IF=10 mA, TA=25°C |
| Input Reverse Current | max 10 uA at VR=5 V, TA=25°C |
| Input Capacitance | typ 30 pF, max 250 pF at VR=0 V, f=1 kHz, TA=25°C |
| Collector-Emitter Dark Current | max 100 nA at VCE=200 V, IF=0, TA=25°C |
| Emitter-Collector Breakdown Voltage | min 7 V at IE=0.1 mA, IF=0, TA=25°C |
| Collector-Emitter Saturation Voltage | max 0.4 V at IF=20 mA, IC=1 mA, TA=25°C |
| Isolation Resistance | 1x10^11 ohm at VIO=500 Vdc, 40-60% RH |
| Floating Capacitance | typ 0.6 pF at VIO=0, f=1 MHz |
| Cut-off Frequency | typ 80 kHz at VCE=5 V, IC=2 mA, RL=100 ohm, -3 dB |
| Turn-On Time | typ 4 us, max 18 us at VCE=2 V, RL=100 ohm, IC=2 mA |
| Turn-Off Time | typ 5 us, max 18 us at VCE=2 V, RL=100 ohm, IC=2 mA |
| Reflow Preheat Temperature | 150-200 °C, reflow soldering profile Ts |
| Reflow Preheat Time | 60-120 s, reflow soldering profile ts |
| Reflow Ramp-Up Rate | 3 °C/s from TL to TP |
| Reflow Liquidus Temperature | 217 °C, TL |
| Reflow Time Above Liquidus | 60-150 s, tL |
| Reflow Peak Temperature | 260 °C, Tp |
| Reflow Peak Time | 30 s between TP-5 and TP |
| Reflow Ramp-Down Rate | 6 °C/s from TP to TL |
| Maximum Reflow Cycles | No more than 3 times |
| Hand Soldering Iron Temperature | 360 °C +5 °C within 3 s for rework or sample testing |
| Datasheet Status | request_only |
Product Overview
The XL851S-G is a XINGLIGHT phototransistor optocoupler categorized under LED components. It belongs to the XL851 product series and uses an SMD4 package. Ordering data for the XL851S configuration lists 2000 pcs per tape and reel and the marking code XL851.
Electrical characteristics include 50-600% current transfer ratio at IF=5 mA and VCE=5 V, 5000 Vrms isolation voltage under 40-60% RH for 1 minute, and a collector-emitter breakdown voltage of at least 350 V at IC=0.1 mA with IF=0. Output ratings include 50 mA collector current, 350 V collector-emitter voltage, and 150 mW collector power dissipation.
Input-side ratings include 60 mA forward current, 6 V reverse voltage, and 100 mW input power dissipation. Assembly data includes a 260 °C soldering temperature for 10 seconds, a reflow peak temperature of 260 °C, and no more than three recommended reflow cycles. These parameters fit isolated signal transfer and phototransistor-output interface applications.
Key Features
- Phototransistor optocoupler in the XL851 series
- SMD4 package with XL851 marking code
- 2000 pcs supplied per tape and reel
- 50-600% current transfer ratio at specified bias
- 5000 Vrms isolation for one minute
- Collector-emitter breakdown voltage rated at least 350 V
- -55 to +100 °C operating temperature range
- 60 mA input forward current rating
- Typical 80 kHz cut-off frequency
- Typical 4 us turn-on and 5 us turn-off
Typical Applications
- Isolated signal transfer
- Phototransistor-output coupling
- PCB-level electrical isolation
- Low-frequency isolation interfaces
- Transistor-output switching circuits
- Reflow-assembled SMD optocoupler designs
Procurement Notes
When requesting a quote for XL851S-G, 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.
FAQ
What type of device is the XL851S-G?
The XL851S-G is identified as a XINGLIGHT phototransistor optocoupler in the LED category. It belongs to the XL851 series and is associated with an SMD4 package.
What isolation rating is specified for XL851S-G?
The extracted datasheet facts specify 5000 Vrms isolation voltage under 40-60% relative humidity with AC applied for 1 minute. Isolation resistance is listed as 1x10^11 ohm at VIO=500 Vdc.
What soldering and reflow limits are listed?
The soldering temperature is 260 °C for 10 seconds. The reflow profile lists 150-200 °C preheat, 217 °C liquidus, 260 °C peak temperature, and no more than three reflow cycles.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 3, 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.