Diodes Incorporated 1N4752A-T

Overview

1N4752A-T from Diodes Incorporated is a 1.0 W, 33 V ±5% Zener diode in DO-41 glass package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 7.5 mA test current, 45 Ω dynamic impedance at I_ZT, <5 µA reverse leakage at 25.1 V, and operates from –65°C to +175°C - used in industrial power supply feedback loops and analog reference circuits.

For engineers reviewing the 1N4752A-T datasheet, 1N4752A-T pinout, 1N4752A-T application, or 1N4752A-T equivalent, key selection criteria include nominal Zener voltage (33 V), power dissipation (1.0 W), Zener impedance (45 Ω), thermal resistance (175 °C/W), and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

This discrete Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations. Its 33 V nominal Zener voltage is specified at 7.5 mA test current (I_ZT) with ±5% tolerance, and exhibits a positive temperature coefficient (+0.06 to +0.095 %/°C) ensuring predictable drift under thermal stress.

The device uses a glass-passivated DO-41 package with Sn96.5Ag3.5 terminations, rated for 1.0 W power dissipation at 25°C and derated linearly above 50°C (6.67 mW/°C). Its 175 °C/W junction-to-ambient thermal resistance assumes 9.5 mm lead length per MIL-STD-202.

Key Specifications

Pinout & Package

DO-41 glass axial package with cathode band marking; two-terminal unidirectional device. No polarity-sensitive IC-style pin numbering - anode and cathode defined by physical band location.

Key Features

Applications

Availability

1N4752A-T is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, analog sensor references, and microcontroller reset circuits requiring stable component supply and long-term obsolescence management.

Supply support for 1N4752A-T 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and computing applications.

The 1N47xxA series belongs to Diodes' legacy Zener diode product line, engineered for general-purpose voltage regulation and protection in cost-sensitive, high-volume power management systems.

FAQ

What is the maximum surge current rating for 1N4752A-T?

The 1N4752A-T is rated for 135 mA maximum surge current under an 8.3 ms single half-sine wave condition, as specified in the Electrical Characteristics table. This rating applies at 25°C ambient and assumes proper PCB copper pour and lead length per thermal derating guidelines.

Is 1N4752A-T RoHS compliant?

Yes - the 1N4752A-T features a lead-free Sn96.5Ag3.5 termination and complies with EU Directive 2002/95/EC (RoHS), including applicable exemptions for glass passivation and high-temperature soldering per Annex Notes 5 and 7.

How does the temperature coefficient affect regulation accuracy?

With a +0.06 to +0.095 %/°C temperature coefficient, the 1N4752A-T's Zener voltage increases ~20 mV/°C near 33 V. Over a 100°C range (–25°C to +75°C), this results in ~2.0–3.2 V total drift - requiring compensation in precision references but acceptable for general-purpose clamping.

Can 1N4752A-T replace 1N4752A-A in the same footprint?

Yes - both share identical DO-41 glass packaging, electrical specifications, and mechanical dimensions. The "-T" suffix denotes tape-and-reel packaging (5,000 units/reel); "-A" indicates ammo pack. No layout or schematic changes are needed for substitution.