ULN2003AM/TR Darlington Transistors by HGSEMI – High-Current Driver IC for Inductive Loads
The Darlington Transistors ULN2003AM/TR by HGSEMI are versatile, high-current transistor arrays designed for driving a wide range of inductive and resistive loads. With 7 open-collector Darlington pair outputs and integrated clamp diodes, this IC is a go-to solution in motor control, relay boards, lighting systems, and power automation.
In this blog, we’ll cover the specifications, core features, applications, wiring overview, and comparable products from Huaguan. Whether you're developing industrial automation or consumer products, the ULN2003AM/TR fits seamlessly into modern Semiconductors design environments.
Technical Specifications of ULN2003AM/TR
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Manufacturer: HGSEMI
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Part Number: ULN2003AM/TR
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Type: 7-Channel Darlington Transistor Array
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Output Current per Channel: 500mA
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Output Voltage (Vce): Up to 50V
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Input Compatibility: TTL/CMOS logic
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Diode Protection: Built-in flyback diodes
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Package Type: SOP-16
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Category: Semiconductors, Discrete Semiconductors, Transistors, Darlington Transistors
This IC is designed for direct interface with logic-level outputs and can drive high-current loads such as relays, lamps, and stepper motors.
Key Features of ULN2003AM/TR Darlington Transistors
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7-Channel High-Current Outputs – Suitable for multiple load control from a single IC
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Integrated Clamp Diodes – Built-in protection for inductive load switching
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Compact SOP-16 Package – Ideal for space-constrained applications
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Logic-Level Input Compatibility – Works seamlessly with microcontrollers
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Versatile Load Support – Drives motors, lamps, solenoids, and relays
These features make ULN2003AM/TR Darlington Transistors a staple among Discrete Semiconductors in embedded, automation, and control systems.
Applications of ULN2003AM/TR
The ULN2003AM/TR Darlington Transistors are ideal for use in:
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Relay Driver Modules
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Stepper Motor Control Circuits
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LED Arrays and Lamp Drivers
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Automotive Control Systems
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Industrial Automation Panels
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Printer and Scanner Mechanisms
This versatile device is widely used in projects requiring efficient and compact Transistors capable of high-current switching.
Wiring and Pin Configuration Overview
Pin Configuration (SOP-16):
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Pins 1–7: Input signals from MCU or logic system
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Pins 10–16: Corresponding outputs to the loads
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Pin 8: Ground
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Pin 9 (COM): Connect to load supply for internal diode clamping
This layout simplifies wiring while protecting against voltage spikes during inductive switching—hallmark of efficient Darlington Transistors.
Use Case Scenario: Multi-Relay Control System for Smart Building
Scenario: An IoT integrator needed a compact solution to control seven independent relays in a smart building module using a low-cost microcontroller.
Problem: External flyback diodes and discrete transistors were increasing board size and complexity.
Solution: The ULN2003AM/TR Darlington Transistors by HGSEMI provided an all-in-one relay driver solution with built-in protection.
Result: Reduced design complexity, minimized PCB size, and ensured robust operation—a perfect use case for Semiconductors that simplify power control.
Also Available from Other Manufacturers
If you’re looking for alternatives to the ULN2003AM/TR, consider reliable options from:
Xon Electronics provides both brands to meet different project needs and sourcing requirements.
Download Datasheet for ULN2003AM/TR
Looking for electrical characteristics, pinout diagrams, or thermal data?
[Download the ULN2003AM/TR Datasheet from Xon Electronics]
Why Buy from Xon Electronics?
Choose ULN2003AM/TR Darlington Transistors by HGSEMI from Xon Electronics and enjoy:
- 100% Genuine HGSEMI Components
- Global Shipping – USA, India, Australia, Europe & more
- Bulk Order Support for OEMs
- Engineering Assistance for Integration
- Fast & Secure Online Ordering
Your trusted supplier for all Semiconductors, Transistors, and Discrete Semiconductors.
FAQs – ULN2003AM/TR Darlington Transistors
Q1. How many outputs does ULN2003AM/TR offer?
It features 7 high-current Darlington output channels.
Q2. Is it compatible with 5V logic?
Yes, it accepts TTL and CMOS logic levels.
Q3. Are flyback diodes included?
Yes, each output has a built-in clamp diode.
Q4. What’s the max output current per channel?
Up to 500mA continuous per output.
Q5. Is international shipping available?
Yes, we ship globally including USA, India, Australia, Europe, and more.
Conclusion
The ULN2003AM/TR Darlington Transistors by HGSEMI are compact, integrated driver ICs ideal for controlling relays, motors, and other high-current loads. With built-in protection and easy MCU interfacing, these Transistors simplify complex switching tasks in modern electronics.
Available now at Xon Electronics — with global delivery to USA, India, Australia, Europe, and other countries.