## Overview

The Vishay 1N4948GP-E3/73 is a high-voltage, fast-recovery rectifier diode designed for applications requiring high efficiency, rapid switching, and low reverse recovery time. It is particularly suited for switch-mode power supplies (SMPS), inverters, and high-frequency rectification circuits where minimizing power losses and heat generation is critical. The device belongs to the 1N4948 series and is manufactured with high-reliability processes for industrial and commercial applications.

## Key Features

* High repetitive peak reverse voltage: 400 V
* Average forward current: 1 A
* Fast recovery time: typical 150 ns
* Low forward voltage drop: typical 1.0 V at 1 A
* Low reverse recovery charge for high-efficiency switching
* High surge capability: 30 A non-repetitive peak
* RoHS compliant and halogen-free
* Glass-passivated junction for enhanced reliability
* Hermetically sealed DO-41 axial package

## Electrical Specifications

* Maximum repetitive peak reverse voltage (VRRM): 400 V
* Maximum RMS voltage (VRMS): 280 V
* Maximum DC blocking voltage (VDC): 400 V
* Maximum average forward current (IF(AV)): 1 A
* Maximum forward surge current (IFSM): 30 A
* Forward voltage drop (VF): 1.0 V typical at 1 A, 1.2 V maximum
* Reverse current (IR): 5 μA typical at rated VR, 50 μA maximum
* Junction capacitance (CJ): approximately 15 pF
* Reverse recovery time (trr): 150 ns typical at IF = 0.5 A, IR = 1 A, RL = 100 Ω
* Thermal resistance junction-to-ambient (RθJA): 75 °C/W typical
* Operating and storage temperature range: -65°C to +175°C

## Functional Description

* The 1N4948GP-E3/73 functions as a high-voltage rectifier capable of converting AC signals to DC in power electronics circuits.
* Its fast recovery characteristic makes it ideal for high-frequency switching applications, reducing losses caused by charge storage during the reverse transition.
* The low forward voltage drop minimizes conduction losses, improving overall efficiency of power supply systems.
* The glass-passivated junction and DO-41 package enhance long-term reliability under thermal and electrical stress.
* The diode supports surge events, enabling brief overcurrent conditions without degradation.

## Package and Mechanical

* DO-41 axial leaded package
* Lead spacing: 25.4 mm typical
* Lead diameter: 0.8 mm typical
* Body length: 4.6 mm typical
* Diameter: 2.5 mm typical
* Solderable per MIL-STD-202 standards
* Marking: series code printed on body for easy identification

## Applications

* Switch-mode power supplies (SMPS)
* High-voltage inverters and converters
* Freewheeling diodes for inductive loads
* High-frequency rectification in industrial electronics
* Snubber and clamping circuits for transient voltage suppression
* General-purpose rectification in AC-to-DC and DC-to-DC applications

The Vishay 1N4948GP-E3/73 provides a high-performance solution for high-voltage, fast-switching applications, combining reliability, efficiency, and ruggedness in a compact DO-41 package, suitable for both industrial and consumer electronics environments.