ULN2004AN Darlington Transistors by HTC Korea – Efficient 7-Channel Driver for High-Voltage Loads
The Darlington Transistors ULN2004AN by HTC Korea are designed for driving high-voltage, high-current loads directly from logic-level signals. With 7 independent Darlington Transistors integrated into a single DIP-16 package, this IC is perfect for relay driving, motor control, and lamp driving applications. The built-in flyback diodes offer protection from inductive kickback, simplifying your design while ensuring long-term reliability.
In this blog, we will explore the technical specifications, features, application use cases, wiring details, and alternatives from Texas Instruments. Whether you’re designing industrial systems or home automation, this component is a top choice in Semiconductors.
Technical Specifications of ULN2004AN
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Manufacturer: HTC Korea
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Part Number: ULN2004AN
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Type: Darlington Transistor Array
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Package Type: DIP-16
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Output Voltage: Up to 50V
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Output Current per Channel: 500mA
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Input Compatibility: 6–15V (TTL/CMOS logic)
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Built-in Protection: Flyback diodes for inductive loads
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Category: Semiconductors, Discrete Semiconductors, Transistors, Darlington Transistors
This IC enables efficient and compact control of power components from low-power logic circuits.
Key Features of ULN2004AN Darlington Transistors
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7-Channel Output – Drive up to seven independent loads such as relays or motors
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High Voltage Tolerance – Up to 50V output capability
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Integrated Clamp Diodes – Flyback protection for inductive loads
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Wide Logic Input Range – Compatible with both TTL and CMOS logic
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Compact DIP-16 Form – Easily integrates into through-hole PCB designs
ULN2004AN Darlington Transistors are reliable, easy-to-use components that reduce design complexity in high-current control applications.
Applications of ULN2004AN
The ULN2004AN Darlington Transistors are widely used in:
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Relay Boards and Driver Modules
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Lamp and LED Array Drivers
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Stepper Motor Controllers
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Printers, Scanners, and Office Equipment
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HVAC and Home Automation Panels
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Industrial Control and Logic Boards
Their versatility makes them ideal Transistors for controlling power-heavy loads in both industrial and commercial settings.
Wiring and Pin Configuration Overview
Pin Setup (DIP-16):
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Pins 1–7: Inputs from microcontroller or logic device
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Pins 10–16: Outputs to loads
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Pin 8 (GND): Ground connection
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Pin 9 (COM): Common flyback diode connection (connect to load voltage)
This efficient layout minimizes component count, especially in circuits requiring multiple high-current drivers, simplifying your Discrete Semiconductors implementation.
Use Case Scenario: Relay Driver for Industrial PLC System
Scenario: An automation engineer needed a compact, multi-output relay driver for a custom PLC interface.
Challenge: Using individual Transistors increased PCB space and required separate protection diodes.
Solution: By integrating the ULN2004AN Darlington Transistors, the engineer reduced component count and improved protection with a single IC.
Result: Enhanced system reliability, reduced development time, and optimized PCB real estate—ideal benefits from a trusted Semiconductor component.
Also Available from Other Manufacturers
Looking for alternatives to the ULN2004AN?
Xon Electronics provides sourcing options from both brands to support your supply chain needs.
Download Datasheet for ULN2004AN
Need complete technical specs or electrical diagrams?
[Download the ULN2004AN Datasheet from Xon Electronics]
Why Buy from Xon Electronics?
Choose ULN2004AN Darlington Transistors by HTC Korea from Xon Electronics and enjoy:
- 100% Authentic HTC Korea Components
- Worldwide Shipping – USA, India, Australia, Europe & more
- Special Pricing for OEM/Volume Orders
- Application Support from Engineering Experts
- Safe, Fast, and Secure Online Purchase
Your global supplier for all things Semiconductors, Transistors, and Discrete Semiconductors.
FAQs – ULN2004AN Darlington Transistors
Q1. Can the ULN2004AN drive inductive loads like relays and motors?
Yes, it's built for such loads and includes built-in flyback protection.
Q2. What’s the logic voltage input range?
Compatible with 6V to 15V logic systems (TTL and CMOS).
Q3. How much current can each channel handle?
Each output can handle up to 500mA.
Q4. Does it support through-hole mounting?
Yes, it's available in DIP-16 for standard PCB mounting.
Q5. Is global shipping available?
Yes, Xon Electronics ships to the USA, India, Australia, Europe, and many more countries.
Conclusion
The ULN2004AN Darlington Transistors by HTC Korea offer an efficient, compact, and reliable solution for switching high-voltage, high-current loads using logic-level inputs. Designed with built-in protection and wide application support, this IC is a favorite among designers and engineers working on embedded and industrial systems.
Now available at Xon Electronics — delivering worldwide to the USA, India, Australia, Europe, and more.