Taiwan Semiconductor Corporation 1N4764A A0G

Overview

1N4764A A0G from Taiwan Semiconductor is a 1 W, 100 V ±5% Zener diode in DO-41 package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 2.5 Ω dynamic impedance at 350 mA test current, maintains leakage current <5 μA at 76 V reverse bias, and operates across –55°C to +150°C junction temperature range.

For engineers reviewing the 1N4764A A0G datasheet, 1N4764A A0G pinout, 1N4764A A0G application, or 1N4764A A0G equivalent, key selection criteria include nominal zener voltage tolerance (±5%), surge current rating (45 A non-repetitive), thermal resistance (θ_JL ≈ 50°C/W at 0.3" lead length), and AEC-Q101 qualification availability in variant versions.

Technical Context

This discrete Zener diode functions as a two-terminal shunt regulator, maintaining stable reference voltage by operating in reverse breakdown with controlled dynamic impedance. Its glass-passivated junction ensures low leakage and long-term stability under thermal cycling.

The device exhibits a positive temperature coefficient above ~12 V, with typical θ_Vz of +8.5 mV/°C at 100 V, enabling predictable drift compensation in temperature-sensitive references. Surge capability is defined per JEDEC for 1/120 s half-sine pulses, not repetitive AC stress.

Key Specifications

Pinout & Package

DO-204AL (DO-41) axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4764A A0G, the 1N4764A variant offers identical performance with optimized packaging for high-throughput assembly, while 1M110Z A0G provides a higher-voltage alternative requiring schematic and layout review due to different regulation point and thermal behavior.

Availability

1N4764A A0G is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, test equipment references, and LED driver protection requiring stable component supply with consistent DO-41 mechanical fit and ±5% voltage tolerance.

Supply support for 1N4764A 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 AEC-Q101 and RoHS compliance capabilities.

The 1N47xxA series was developed for cost-effective, high-reliability voltage regulation in automotive, industrial, and consumer power systems-emphasizing stable V_Z, low leakage, and robust surge handling in standard DO-41 form factor.

FAQ

What is the exact zener voltage tolerance for 1N4764A A0G?

The 1N4764A A0G has a nominal zener voltage of 100 V with a guaranteed tolerance of ±5%, meaning the actual measured V_Z falls between 95.0 V and 105.0 V when tested at I_ZT = 350 mA and T_L = 30°C ±1°C. This tolerance is standardized per JEDEC registration and applies to all units bearing the 1N4764A A0G marking.

Is 1N4764A A0G suitable for automotive applications?

The base 1N4764A A0G is not AEC-Q101 qualified, but Taiwan Semiconductor offers the 1N4764AH A0G variant with full AEC-Q101 certification. For automotive use, engineers must specify the "H" suffix version; the 1N4764A A0G itself meets mechanical and environmental specs (e.g., JESD 201 whisker test, –55°C to +150°C T_J) but lacks formal automotive qualification.

What is the maximum non-repetitive surge current rating for 1N4764A A0G?

The 1N4764A A0G is rated for 45 A peak non-repetitive surge current, defined per JEDEC as a single 1/120 s half-sine pulse superimposed on the 350 mA test current. This rating assumes proper PCB thermal management; actual capability may vary with lead length and copper area, as shown in Figure 10 of the official datasheet.

How does the zener impedance of 1N4764A A0G affect regulation accuracy?

The 1N4764A A0G exhibits 2.5 Ω dynamic impedance (Z_ZT) at I_ZT = 350 mA, meaning a 100 mA change in load current causes approximately 250 mV output variation. This low Z_ZT enables tight regulation in shunt configurations where source impedance is significantly higher than 2.5 Ω.

Can 1N4764A A0G be used in place of 1N4763A or 1N4765A?

No-1N4764A A0G is not a drop-in replacement for 1N4763A (91 V) or 1N4765A (110 V). Its 95–105 V range is distinct; substituting alters regulation point by ≥5 V, risking overvoltage or undervoltage in sensitive circuits. Always verify V_Z match and re-evaluate power dissipation and thermal design before substitution.