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Uln2805a

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Overview

Product sourcing insights & recommendations

Datasheet4U
STMicroelectronics
26 来源

The ULN2805A is a high-sensitivity octal Darlington transistor array primarily used for driving high-power loads from low-level logic sources. As of 2026, this component is classified as Obsolete by its primary manufacturer, STMicroelectronics, and has been largely replaced in the market by the more common ULN2803A or modern MOSFET-based drivers.

While factory production has ceased, legacy stock remains available through specialized B2B channels. The ULN2805A is distinguished by its 1.35 kΩ input resistance, offering higher sensitivity compared to the 2.7 kΩ resistance of the ULN2803A. For current sourcing needs, the market is shifting toward surface-mount (SOP) packages, although original DIP-18 inventory for legacy repairs can still be found at prices ranging from $0.20 to $1.80 per unit.

I have compiled a detailed report covering technical specifications, a comparison with common alternatives, and current 2026 market trends. You can find the full analysis in the file below.

Here is the market and technical overview for the ULN2805A. You can continue with:

Uln2805a Transistor Array Chip

Products · 2 lists

New Original Darlington Transistor Array Chip 8NPN DIP-18 ULN2804 ULN2804A

New Original Darlington Transistor Array Chip 8NPN DIP-18 ULN2804 ULN2804A

$0.20-0.994.6(465)
MOQ: 1 piece
5% reorder rate≤1h response time
Shenzhen Xinxiangrong Electronic Technology Co., Ltd.Shenzhen Xinxiangrong Electronic Technology Co., Ltd.🇨🇳CN1 yr
New Original Darlington Transistor Array Chip 8NPN DIP-18 ULN2804 ULN2804A

New Original Darlington Transistor Array Chip 8NPN DIP-18 ULN2804 ULN2804A

$0.20-0.994.7(469)
MOQ: 1 piece
≤4h response time
Shenzhen Dongjiang Chuangfu Technology Co., Ltd.Shenzhen Dongjiang Chuangfu Technology Co., Ltd.🇨🇳CN1 yr
New Original ULN2803ADWR SOIC-18 8-Channel Darlington Transistor Array Chip

New Original ULN2803ADWR SOIC-18 8-Channel Darlington Transistor Array Chip

$0.105.0(402)
MOQ: 1 piece
40% reorder rate≤2h response time
Shenzhen Wilsom Electronic Co., LtdShenzhen Wilsom Electronic Co., Ltd🇨🇳CN1 yr
New Original ULN2803ADWR SOIC-18 8-Channel Darlington Transistor Array Chip

New Original ULN2803ADWR SOIC-18 8-Channel Darlington Transistor Array Chip

$0.104.7(801)
MOQ: 1 piece
100+ store reviews12% reorder rate≤1h response time
Shenzhen Hongda Xinyuan Technology Co., Ltd.Shenzhen Hongda Xinyuan Technology Co., Ltd.🇨🇳CN3 yrs
100% Original & New IC Chip ULN2003A Bipolar (BJT) Transistor Array Through Hole 16-DIP Electronic Component

100% Original & New IC Chip ULN2003A Bipolar (BJT) Transistor Array Through Hole 16-DIP Electronic Component

$0.10-0.204.8(535)
MOQ: 1 piece
50+ store reviews33% reorder rate≤7h response time
Shenzhen Jia Zhida Electronics Co., Ltd.Shenzhen Jia Zhida Electronics Co., Ltd.🇨🇳CN5 yrs
Hot Sale ULN2003ADR Darlington Transistor Array Chip High Voltage Relay Driver IC For Motor Driving Control Circuits

Hot Sale ULN2003ADR Darlington Transistor Array Chip High Voltage Relay Driver IC For Motor Driving Control Circuits

$0.154.2(200)
MOQ: 100 pieces
≤2h response time
Guangzhou Jianxiang Technology Co., Ltd.Guangzhou Jianxiang Technology Co., Ltd.🇨🇳CN1 yr
New Original ULN2003ADR ULN2003A SOP-16 Chip Driver IC Chip Transistor Array

New Original ULN2003ADR ULN2003A SOP-16 Chip Driver IC Chip Transistor Array

$0.06-0.1954.7(703)
MOQ: 100 pieces
11% reorder rate≤2h response time
Shenzhen Chipsrsun Technology Co., Ltd.Shenzhen Chipsrsun Technology Co., Ltd.🇨🇳CN1 yr
New Original ULN2003ADR ULN2003A SOP-16 Chip Driver IC Chip Transistor Array

New Original ULN2003ADR ULN2003A SOP-16 Chip Driver IC Chip Transistor Array

$0.08-0.264.8(560)
MOQ: 100 pieces
700+ store reviews12% reorder rate≤3h response time
Shenzhen Cxcw Electronic Co., Ltd.Shenzhen Cxcw Electronic Co., Ltd.verified🇨🇳CN12 yrs
ULN2004ADR SOIC-16 Darlington Transistor Array Wholesale IC

ULN2004ADR SOIC-16 Darlington Transistor Array Wholesale IC

$27.694.9(567)
MOQ: 1 piece
50+ store reviews14% reorder rate≤2h response time
Shenzhen Yuke Chip Electronics Co., Ltd.Shenzhen Yuke Chip Electronics Co., Ltd.verified🇨🇳CN1 yr
ULN2003A Darlington Transistor Array IC 7-Channel Load Driver SOP-16 Package

ULN2003A Darlington Transistor Array IC 7-Channel Load Driver SOP-16 Package

$0.054.6(431)
MOQ: 100 pieces
200+ store reviews10% reorder rate≤3h response time
Shenzhen Hangguo Technology Co., Ltd.Shenzhen Hangguo Technology Co., Ltd.🇨🇳CN5 yrs
ULN2003ADR SOP-16 Darlington Transistor Array Chip 7 Channels Inverting Output for Stepper Motor Control

ULN2003ADR SOP-16 Darlington Transistor Array Chip 7 Channels Inverting Output for Stepper Motor Control

$0.04-0.064.8(549)
MOQ: 5 pieces
1200+ store reviews33% reorder rate≤2h response time
Shenzhen Yixinou Electronic Technology Co., Ltd.Shenzhen Yixinou Electronic Technology Co., Ltd.🇨🇳CN5 yrs
ULN2003AIDR Darlington Transistor Array IC 7-Channel NPN High Voltage 50V High Current 500mA TTL/CMOS Compatible -40~+105

ULN2003AIDR Darlington Transistor Array IC 7-Channel NPN High Voltage 50V High Current 500mA TTL/CMOS Compatible -40~+105

$0.253.9(943)
MOQ: 5 pieces
≤1h response time
Shenzhen Weiye Chengsheng Technology Co., Ltd.Shenzhen Weiye Chengsheng Technology Co., Ltd.🇨🇳CN1 yr
Original Genuine ULN2803A Surface Mount 18-Lead 8 Darlington Array 50V 0.5A Electronic Component IC

Original Genuine ULN2803A Surface Mount 18-Lead 8 Darlington Array 50V 0.5A Electronic Component IC

$1.56-2.824.5(131)
MOQ: 10 pieces
≤12h response time
ROSA Goods Global IncROSA Goods Global Inc🇺🇸US1 yr
ULN2803A SOP-18 Darlington Array Power Driver Integrated Circuit IC Original Authentic

ULN2803A SOP-18 Darlington Array Power Driver Integrated Circuit IC Original Authentic

$0.204.6(481)
MOQ: 10 pieces
200+ store reviews2% reorder rate≤2h response time
Shenzhen Dangjie Technology Co., Ltd.Shenzhen Dangjie Technology Co., Ltd.🇨🇳CN2 yrs
ULN2803A ICGOODFIND Darlington Transistor Array IC DIP18 Relay Drive Circuit Component

ULN2803A ICGOODFIND Darlington Transistor Array IC DIP18 Relay Drive Circuit Component

$1-3.304.3(108)
MOQ: 999990 pieces
50+ store reviews≤3h response time
ICGOODFIND (Shenzhen) Electronics Technology Co., Ltd.ICGOODFIND (Shenzhen) Electronics Technology Co., Ltd.🇨🇳CN1 yr
Best-selling Model ULN2803ADWR ULN2803A 8-channel Darlington Transistor Array Chip - New Original Equipment Bulk Discount

Best-selling Model ULN2803ADWR ULN2803A 8-channel Darlington Transistor Array Chip - New Original Equipment Bulk Discount

$0.594-2.884.8(240)
MOQ: 1 piece
≤3h response time
Shenzhen Hongtaisheng Electronics Co., Ltd.Shenzhen Hongtaisheng Electronics Co., Ltd.🇨🇳CN1 yr
Smart Electronics ULN2003ADR Original Genuine SMD SOIC-16 Darlington Transistor Array Chip IC

Smart Electronics ULN2003ADR Original Genuine SMD SOIC-16 Darlington Transistor Array Chip IC

$0.15-0.204.8(647)
MOQ: 500 pieces
200+ store reviews22% reorder rate≤1h response time
Shenzhen Smart Electronics Co., LtdShenzhen Smart Electronics Co., Ltd🇨🇳CN14 yrs
ULN2803ADWR Darlington Transistor Array 50V 500MA SOIC-18 New and Original IC chip in stock ULN2803ADWR

ULN2803ADWR Darlington Transistor Array 50V 500MA SOIC-18 New and Original IC chip in stock ULN2803ADWR

$0.99-1.984.7(712)
MOQ: 10 pieces
50+ store reviews11% reorder rate≤3h response time
Shenzhen Pinkuo Trading Co., Ltd.Shenzhen Pinkuo Trading Co., Ltd.🇨🇳CN2 yrs
ULN2003ADR SOIC-16 Darlington Transistor Array In Stock IC

ULN2003ADR SOIC-16 Darlington Transistor Array In Stock IC

$27.694.3(410)
MOQ: 1 piece
25% reorder rate≤4h response time
Shenzhen Jianuoxin Technology Co., Ltd.Shenzhen Jianuoxin Technology Co., Ltd.🇨🇳CN2 yrs
ULN2003ADR SOIC-16 Darlington Transistor Array In Stock IC

ULN2003ADR SOIC-16 Darlington Transistor Array In Stock IC

$27.695.0(266)
MOQ: 1 piece
14% reorder rate≤4h response time
Shenzhen Working Technology Co.,Ltd.Shenzhen Working Technology Co.,Ltd.verified🇨🇳CN6 yrs
New ULN2003ADR Soldered ULN2003A SOP-16 High Current Darlington Transistor Array IC Chip

New ULN2003ADR Soldered ULN2003A SOP-16 High Current Darlington Transistor Array IC Chip

$0.194.8(358)
MOQ: 10 pieces
100+ store reviews6% reorder rate≤11h response time
Shenzhen Xinsheng Microelectronics Technology Co., Ltd.Shenzhen Xinsheng Microelectronics Technology Co., Ltd.🇨🇳CN5 yrs
ULN2003ADR 7-Channel NPN Darlington Transistor Array 500mA 50V SOP-16 IC for Relay Stepper Motor LED Driver Applications

ULN2003ADR 7-Channel NPN Darlington Transistor Array 500mA 50V SOP-16 IC for Relay Stepper Motor LED Driver Applications

$0.08-0.234.8(65)
MOQ: 10 pieces
15% reorder rate≤1h response time
Shenzhen Kuanwei Technology Co., Ltd.Shenzhen Kuanwei Technology Co., Ltd.🇨🇳CN1 yr
SY Chips Ics ULN2004AG Integrated Circuit Ic Electronics IC Chip High-Voltage High-Current Transistor Array ULN2004AG

SY Chips Ics ULN2004AG Integrated Circuit Ic Electronics IC Chip High-Voltage High-Current Transistor Array ULN2004AG

$0.45-1.994.7(505)
MOQ: 1 piece
600+ store reviews11% reorder rate≤4h response time
Shenzhen Sy Chips Technology Co., Ltd.Shenzhen Sy Chips Technology Co., Ltd.🇨🇳CN8 yrs
ULN2003V12PWR TSSOP-16 20V 7 Channel NMOS Array Low Side Driver Chip From Other

ULN2003V12PWR TSSOP-16 20V 7 Channel NMOS Array Low Side Driver Chip From Other

$0.105.0(55)
MOQ: 1 piece
18% reorder rate≤1h response time
Shenzhen Dongjingyu Electronic Technology Co., LTD.Shenzhen Dongjingyu Electronic Technology Co., LTD.🇨🇳CN1 yr
ULN2003 DIP-16 Direct Insertion Driver Chip Darlington Transistor Array 7 Channel High Current Relay Ogic Interface

ULN2003 DIP-16 Direct Insertion Driver Chip Darlington Transistor Array 7 Channel High Current Relay Ogic Interface

$0.064.9(944)
MOQ: 100 pieces
50+ store reviews8% reorder rate≤1h response time
Shenzhen Chuangjingke Electronics Co., Ltd.Shenzhen Chuangjingke Electronics Co., Ltd.🇨🇳CN1 yr
ULN2003BDR ULN2003B SOP16 7 Channel Transistor Array Chip

ULN2003BDR ULN2003B SOP16 7 Channel Transistor Array Chip

$2-104.8(991)
MOQ: 10 pieces
100+ store reviews17% reorder rate≤2h response time
Shenzhen E-Tansense Technology Co., Ltd.Shenzhen E-Tansense Technology Co., Ltd.🇨🇳CN11 yrs
ULN2803A 8-Bit High Voltage Darlington Transistor Array for Inductive Load Switching Control Circuit

ULN2803A 8-Bit High Voltage Darlington Transistor Array for Inductive Load Switching Control Circuit

$1.884.9(778)
MOQ: 10 pieces
600+ store reviews20% reorder rate≤3h response time
Shenzhen Sinosky Electronics Co., Ltd.Shenzhen Sinosky Electronics Co., Ltd.verified🇨🇳CN9 yrs
ULN2803A 8-Bit High Voltage Darlington Transistor Array for Inductive Load Switching Control Circuit

ULN2803A 8-Bit High Voltage Darlington Transistor Array for Inductive Load Switching Control Circuit

$1.884.8(777)
MOQ: 10 pieces
19% reorder rate≤3h response time
Shenzhen Jealon Micro Technology Co., Ltd.Shenzhen Jealon Micro Technology Co., Ltd.verified🇨🇳CN3 yrs
Original Authentic ULN2803A SOP-18 Darlington Array Power Driver Integrated Circuit IC Authentic

Original Authentic ULN2803A SOP-18 Darlington Array Power Driver Integrated Circuit IC Authentic

$0.12-5.604.9(669)
MOQ: 5 pieces
50+ store reviews12% reorder rate≤1h response time
Shenzhen Xingweiming Technology Co., Ltd.Shenzhen Xingweiming Technology Co., Ltd.🇨🇳CN1 yr

Deep Dive · Full Report

Full Market Report

1 document · Live-fetched from source

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Sources & References

26 sources cited · Verified industry data & reports

ULN2805A Datasheet - DIP ARRAYS | STMicroelectronics

Datasheet4U

ULN2805A Specifications · Package : DIP · Mount Type : Through Hole · Polarity : NPN · Current Rating : 500mA · Terminals : 18 · Collector Emitter Voltage : 50V ...

ULN2801A, ULN2802A, ULN2803A, ULN2804A

STMicroelectronics

Eight Darlington transistors with common emitters • Output current to 500 mA • Output voltage to 50 V • Integral suppression diodes

ULN2805A and ULN2803AN Specification Comparison

Ovaga Technologies

Explore the differences between the ULN2805A and ULN2803AN with a detailed specification comparison to guide you in choosing the right components.

EIGHT DARLINGTON ARRAYS

es.co.th

DESCRIPTION. The ULN2801A-ULN2805A each contain eight dar- lington transistors with common emitters and inte- gral suppression diodes for inductive loads.

ULN2803A Darlington Array Datasheet | PDF | Cmos

Scribd

ULN2805A. N2805Aeach contain eight dar- lington transistors … features a peak load current rating of 600mA (500mA continuous) and can withstand at least 50V in ...

STMicroelectronics ULN2805A Datasheet PDF

Nantian Electronics

Find the pin configuration, pinout, dimensions and detailed technical data of the STMicroelectronics component in the ULN2805A datasheet PDF.