QT Brightek (QTB) QT851
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RoHS Compliant · Lead-Free EIA-481 Standard

QT Brightek (QTB) QT851

MPN QT851
Active Spot Stock · 24-48h Dispatch 100% Original Sealed

4 PIN HIGH POWER PHOTOTRANSISTOR

In Stock: 11,363 pcs
MOQ: 1 pcs
Logistics: DHL / FedEx DAP (Global Express · 3-7d) Russia & CIS DDP (Door-to-Door Cleared)
Dispatch: Shenzhen / HK
Unit Price (USD)
$1.22 / pc
Direct Purchase Ready
Volume Pricing Breaks Confirmed upon quotation
1+ pcs
$1.22
10+ pcs
$1.10
30+ pcs
$1.00
100+ pcs
$0.90
500+ pcs
$0.84
1,000+ pcs
$0.79
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$1.22 / ea

11,363 in stock — maximum per order · 3–4 days lead time

$1.10 / ea from 10 pcs

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[SPEC] Essential Parameters Snapshot Full Specifications (16)
Package / Case 4-DIP (0.300", 7.62mm)
Output / Current 100mA

Full Technical Specifications

16 Parameters
QT851 specifications
Parameter / AttributeSpecification / Value
SeriesOptocoupler
Input typeDC
Output typeTransistor
MountingThrough Hole
Voltage - isolation5000Vrms
Voltage - output350V
Voltage - forward (Vf)1.2V
Current - output (Channel)100mA
Current transfer ratio600% @ 5mA
Current - DC forward (If)80 mA
Operating temperature-55°C ~ 100°C
PackageTube
Case4-DIP (0.300\", 7.62mm)
Channels1
Vce saturation400mV
Rise (Fall time)6µs, 8µs
Series Sibling Variants

QT Brightek (QTB) Optocoupler Series Models

Sibling variants, package options, and speed/density grades in this QT Brightek (QTB) semiconductor series. Active Shenzhen warehouse allocation and rapid 24-48h dispatch.

QT851
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