Taiwan Semiconductor Corporation 1N4001G-K

Overview

1N4001G-K from Taiwan Semiconductor is a glass-passivated silicon standard rectifier diode rated for 1 A average forward current and 50 V repetitive peak reverse voltage, with 30 A non-repetitive surge capability and 1 V max forward voltage at 1 A. It serves as a primary AC-to-DC conversion element in low-voltage power supplies and adapter circuits.

For engineers reviewing the 1N4001G-K datasheet, 1N4001G-K pinout, 1N4001G-K application, or 1N4001G-K equivalent, key selection criteria include its DO-41 package compatibility, 150°C junction temperature rating, RoHS/halogen-free compliance, and verified performance under 8.3 ms surge conditions.

Technical Context

This discrete rectifier operates as a single-die, unidirectional PN junction device with glass-passivated chip construction to enhance moisture resistance and long-term reliability. Its thermal resistance of 80°C/W (junction-to-ambient) and 150°C maximum junction temperature support operation in compact, convection-cooled designs.

Electrical behavior is defined by a maximum 1 V forward voltage at 1 A and 5 µA reverse leakage at 25°C - critical for minimizing conduction loss and standby power in offline power stages. Junction capacitance is specified at 10 pF under 4 V reverse bias at 1 MHz.

Key Specifications

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, glass-passivated, cathode indicated by band. Leads are pure tin plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar standard rectifier applications.

Compared with 1N4001FS and 1N4001-T, the 1N4001G-K offers the lowest specified reverse leakage (5 µA) and tighter forward voltage control (1 V max), making it preferable for energy-efficient or thermally constrained designs requiring minimal conduction loss and standby current.

Availability

1N4001G-K is available at Aetrix Electronics and suitable for AC/DC wall adapters, industrial control power supplies, and LED driver secondary-side rectification requiring stable component supply and long-term manufacturing continuity.

Supply support for 1N4001G-K includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The 1N400xG-K series belongs to TSC's standard rectifier product line, engineered for cost-effective, high-reliability AC-to-DC conversion in general-purpose power applications with emphasis on surge robustness and environmental compliance.

FAQ

What is the maximum junction temperature rating for the 1N4001G-K?

The 1N4001G-K has a maximum junction temperature (TJ MAX) of +150°C, allowing operation in enclosed or high-ambient-temperature environments without active cooling. This rating is validated under steady-state conditions with proper PCB copper area and airflow. Derating curves in the datasheet show allowable forward current reduction above 75°C ambient, ensuring safe thermal operation throughout the full -55°C to +150°C storage range.

Is the 1N4001G-K RoHS and halogen-free compliant?

Yes, the 1N4001G-K is RoHS compliant and halogen-free per IEC 61249-2-21. The "G" suffix denotes green compound packaging, and the device uses pure tin-plated leads meeting J-STD-002 solderability requirements. These compliance attributes are confirmed in TSC's official documentation and supported by material declarations available upon request for industrial and consumer program qualification.

What does the "-K" suffix indicate in 1N4001G-K?

The "-K" suffix in 1N4001G-K identifies the tape-and-reel packaging option: 5,000 units per reel. It does not denote a functional or electrical variant - all electrical and thermal specifications remain identical to the bulk version. The marking code "1N4001G" appears on the device body, and the "K" is part of the ordering code only, used internally for logistics and assembly line feed systems.

Can the 1N4001G-K be used in full-wave bridge configurations?

Yes, the 1N4001G-K is routinely used in discrete full-wave bridge rectifiers due to its single-die, DO-41 axial configuration and symmetrical electrical characteristics. Four 1N4001G-K diodes can form a 1 A, 50 V bridge with matched VF and thermal response. Its 30 A IFSM rating supports surge handling across all four legs, and the glass-passivated junction ensures consistent long-term performance in such arrangements.

How does the 1N4001G-K compare to the 1N4007G-K in terms of forward voltage and surge capability?

The 1N4001G-K and 1N4007G-K share identical forward voltage (1 V max @ 1 A), surge current (30 A), and thermal ratings (150°C TJ MAX). Their sole difference is peak reverse voltage: 50 V for 1N4001G-K versus 1000 V for 1N4007G-K. Thus, VF and IFSM cannot be traded off - both parts deliver the same conduction efficiency and surge robustness within their respective voltage classes.