Taiwan Semiconductor Corporation 1N4732G A0G

Overview

1N4732G A0G from Taiwan Semiconductor is a 1 W, 4.7 V ±5% Zener diode in DO-41 package, designed for precision voltage regulation and reference applications with 53 mA test current, 8 Ω dynamic impedance at I_ZT, and 10 µA leakage at 1 V reverse bias. It operates across -65°C to +200°C junction temperature range and is used in low-voltage DC/DC converters and LED lighting power supplies.

For engineers reviewing the 1N4732G A0G datasheet, 1N4732G A0G pinout, 1N4732G A0G application, or 1N4732G A0G equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (R_θJA = 100°C/W), power derating above 50°C, cathode-band polarity marking, and DO-41 lead finish compliance with J-STD-002 solderability.

Technical Context

This discrete Zener diode functions as a two-terminal voltage reference by operating in reverse breakdown, where its 4.7 V nominal Zener voltage is maintained within ±5% tolerance at 53 mA test current. Its 8 Ω Zener impedance at I_ZT ensures stable regulation under moderate load variation, while the 10 µA leakage at 1 V reverse bias confirms low standby power loss.

The DO-41 hermetically sealed glass package provides mechanical robustness and thermal performance with R_θJL = 53.5°C/W and R_θJA = 100°C/W, enabling reliable operation in ambient temperatures up to 50°C without derating and supporting manual or wave soldering per J-STD-002.

Key Specifications

Pinout & Package

DO-41 axial-leaded glass package with cathode indicated by a single black band; leads are pure tin plated and solderable per J-STD-002; weight ≈ 242 mg.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Compared with 1N4732A and BZX55-C4V7, the 1N4732G A0G offers superior thermal performance (100°C/W) and full 1 W capability in DO-41, making it optimal for industrial DC/DC converters where reliability and power margin are critical.

Availability

1N4732G A0G is available at Aetrix Electronics and suitable for low-voltage stabilizers, LED lighting power supplies, and on-board DC/DC converters requiring stable component supply with consistent Zener voltage tolerance and RoHS compliance.

Supply support for 1N4732G A0G 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 semiconductor manufacturer specializing in discrete power devices, rectifiers, and Zener diodes with global distribution and AEC-Q200 qualified lines.

The 1N47xxG series is designed for general-purpose voltage regulation and reference applications across industrial, lighting, and adapter markets, emphasizing parametric consistency, hermetic reliability, and cost-effective DO-41 packaging.

FAQ

What is the Zener voltage tolerance of the 1N4732G A0G?

The 1N4732G A0G has a Zener voltage tolerance of ±5% at 4.7 V nominal, measured at 53 mA test current (I_ZT). This tolerance is confirmed in the Electrical Specifications table of the Taiwan Semiconductor datasheet Version G2301 and applies across the full operating temperature range. The 1N4732G A0G maintains this specification without requiring binning or additional calibration.

What is the maximum power dissipation for the 1N4732G A0G at 75°C ambient temperature?

At 75°C ambient, the 1N4732G A0G must be derated linearly from its 1 W rating at 25°C using the specified thermal resistance R_θJA = 100°C/W. Derating begins at 50°C, resulting in approximately 750 mW maximum allowable power at 75°C. This value is calculated directly from the Absolute Maximum Ratings table and thermal performance data in the Taiwan Semiconductor datasheet.

Is the 1N4732G A0G RoHS compliant and lead-free?

Yes, the 1N4732G A0G is RoHS compliant and lead-free, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The device uses green compound encapsulation and pure tin-plated leads meeting J-STD-002 solderability requirements. No lead or other restricted substances exceed EU RoHS Directive limits, and compliance is verified per TSC's material declarations.

What does the "A0G" suffix indicate in the 1N4732G A0G part number?

The "A0G" suffix in 1N4732G A0G denotes the packaging and reel format: "A0" specifies ammo box packaging (3,000 units per box), and "G" indicates green compound encapsulation per RoHS compliance. This coding is defined in the ORDERING INFORMATION section of the Taiwan Semiconductor datasheet and distinguishes it from the "R0G" (reel) variant. The core electrical parameters remain identical across both packages.

How is polarity marked on the 1N4732G A0G diode?

Polarity on the 1N4732G A0G is indicated by a single cathode band - a black annular ring located near one end of the DO-41 glass body. The terminal adjacent to this band is the cathode; the opposite terminal is the anode. This marking is specified in the MECHANICAL DATA section and confirmed in the PACKAGE OUTLINE DIMENSIONS diagram of the Taiwan Semiconductor datasheet.