Specifications
| Type | Description |
|---|---|
| Part Number | XL851-G |
| Manufacturer | XINGLIGHT |
| Product Type | SMD LED |
| Category | LED |
| Package / Case | DIP4, DIP4-M, SMD4 |
| Current Transfer Ratio | 50-600 %; IF=5 mA, VCE=5 V |
| Isolation Voltage | 5000 Vrms; 40-60% RH, AC for 1 minute |
| Collector-Emitter Breakdown Voltage | >=350 V; IC=0.1 mA, IF=0 |
| Operating Temperature | -55 to +100 °C; operating range |
| Forward Current | 60 mA; maximum rating, TA=25°C unless otherwise specified |
| Input Reverse Voltage | 6 V; maximum rating, TA=25°C unless otherwise specified |
| Input Power Dissipation | 100 mW; maximum rating, TA=25°C unless otherwise specified |
| Power Dissipation Derating Factor | 2.9 mW/°C; pulse width <=1 us, duty ratio 0.001 |
| Collector Power Dissipation | 150 mW; maximum rating, TA=25°C unless otherwise specified |
| Output Collector Current | 50 mA; maximum rating, TA=25°C unless otherwise specified |
| Collector-Emitter Voltage | 350 V; maximum rating, TA=25°C unless otherwise specified |
| Emitter-Collector Voltage | 7 V; maximum rating, TA=25°C unless otherwise specified |
| Total Power Dissipation | 200 mW; TA=25°C unless otherwise specified |
| Storage Temperature Range | -55 to +125 °C; storage range |
| Soldering Temperature | 260 °C; for 10 seconds |
| Forward Voltage | typ 1.2 V, max 1.4 V; IF=10 mA, TA=25°C |
| Input Reverse Current | max 10 uA; VR=5 V, TA=25°C |
| Input Capacitance | typ 30 pF, max 250 pF; VR=0 V, f=1 kHz, TA=25°C |
| Collector-Emitter Dark Current | max 100 nA; VCE=200 V, IF=0, TA=25°C |
| Emitter-Collector Breakdown Voltage | min 7 V; IE=0.1 mA, IF=0, TA=25°C |
| Collector-Emitter Saturation Voltage | max 0.4 V; IF=20 mA, IC=1 mA, TA=25°C |
| Isolation Resistance | 1x10^11 ohm; VIO=500 Vdc, 40-60% RH |
| Floating Capacitance | typ 0.6 pF; VIO=0, f=1 MHz, TA=25°C |
| Cut-off Frequency | typ 80 kHz; VCE=5 V, IC=2 mA, RL=100 ohm, -3 dB |
| Turn On Time | typ 4 us, max 18 us; VCE=2 V, RL=100 ohm, IC=2 mA |
| Turn Off Time | typ 5 us, max 18 us; VCE=2 V, RL=100 ohm, IC=2 mA |
| Reflow Preheat Temperature | 150-200 °C; reflow soldering profile |
| Reflow Preheat Time | 60-120 s; reflow soldering profile |
| Reflow Peak Temperature | 260 °C; reflow soldering profile, no more than three times |
| DIP4 Shipping Quantity | 100 pcs/tube; DIP4 package |
| SMD4 Shipping Quantity | 2000 pcs/tape and reel; SMD4 package |
| Datasheet Status | request_only |
Product Overview
Electrical ratings include 60 mA forward current, 6 V input reverse voltage, 350 V collector-emitter voltage, 50 mA output collector current, and 200 mW total power dissipation. The operating temperature range is -55 to +100 °C, with storage from -55 to +125 °C. Assembly data includes 260 °C soldering for 10 seconds and a reflow profile with 150-200 °C preheat, 60-120 s preheat time, and 260 °C peak temperature.
Key Features
- 50-600% current transfer ratio at specified test conditions
- 5000 Vrms isolation voltage for one minute
- 350 V collector-emitter voltage maximum rating
- -55 to +100 °C operating temperature range
- 60 mA input forward current maximum rating
- 50 mA output collector current maximum rating
- Typical 80 kHz cut-off frequency
- Typical 4 us turn-on and 5 us turn-off
- DIP4, DIP4-M, and SMD4 package options
- 260 °C reflow peak temperature profile
Typical Applications
- Isolated signal transfer
- Phototransistor output interfaces
- Input-to-output galvanic isolation
- Control circuit isolation
- DIP4 through-hole assemblies
- SMD4 tape-and-reel assembly
Procurement Notes
When requesting a quote for XL851-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 component is the XL851-G?
The XL851-G is a XINGLIGHT phototransistor optocoupler in the LED category. The listed package cases are DIP4, DIP4-M, and SMD4.
What isolation rating is specified for XL851-G?
The extracted datasheet facts specify 5000 Vrms isolation voltage under 40-60% RH with AC applied for 1 minute. Isolation resistance is listed as 1x10^11 ohm at VIO=500 Vdc.
What are the switching times for XL851-G?
Turn-on time is specified as 4 us typical and 18 us maximum. Turn-off time is specified as 5 us typical and 18 us maximum, both at VCE=2 V, RL=100 ohm, and IC=2 mA.
What assembly formats are listed for XL851-G?
The package cases are DIP4, DIP4-M, and SMD4. Shipping data lists DIP4 at 100 pieces per tube and SMD4 at 2000 pieces per tape and reel.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 4, 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.