Diodes Incorporated PR1503S-T

Overview

PR1503S-T from Diodes Incorporated is a 1.5A fast recovery rectifier diode in DO-41 package, rated for 200V peak repetitive reverse voltage (VRRM), 1.2V forward voltage at 1.5A, and 150ns reverse recovery time - optimized for high-efficiency AC/DC front-end rectification in offline power supplies and auxiliary rails.

For engineers reviewing the PR1503S-T datasheet, PR1503S-T pinout, PR1503S-T application, or PR1503S-T equivalent, key selection criteria include its 200V blocking capability, 50A non-repetitive surge rating, low thermal resistance (35 K/W), RoHS-compliant bright tin plating, and suitability for single-phase half-wave 60Hz resistive/inductive loads.

Technical Context

This device employs a diffused junction structure to achieve fast switching with low forward voltage drop and minimal reverse recovery charge. Its 150ns trr and 20pF junction capacitance support operation in medium-frequency rectifier stages up to ~100kHz without excessive switching loss.

The DO-41 axial package enables through-hole mounting with defined thermal path to ambient (R_JA = 35 K/W), and the cathode band polarity marking ensures unambiguous orientation during PCB assembly and automated insertion.

Key Specifications

Pinout & Package

DO-41 axial-leaded plastic package with cathode identified by a painted band on the body. Leads are bright tin-plated, solderable per MIL-STD-202 Method 208, and compliant with UL 94V-0 flammability rating.

Key Features

Applications

Availability

PR1503S-T is available at Aetrix Electronics and suitable for AC/DC adapter input rectification, industrial control power supplies, LED driver auxiliary rails, and appliance microcontroller bias supplies requiring stable component supply and legacy-design continuity.

Supply support for PR1503S-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-performance, high-reliability components for power management, signal integrity, and protection applications.

The PR150x/S series belongs to Diodes' general-purpose fast recovery rectifier product line, designed specifically for cost-sensitive, medium-power AC/DC conversion where efficiency, surge robustness, and thermal performance outweigh ultra-fast or ultra-low-VF requirements.

FAQ

What is the maximum allowable junction temperature for PR1503S-T?

The absolute maximum junction temperature is +150°C, as specified in the datasheet's Operating and Storage Temperature Range. This limit applies under steady-state conditions with proper thermal management; exceeding it risks permanent degradation of the PN junction and accelerated reverse leakage growth.

Is PR1503S-T compatible with lead-free reflow soldering processes?

Yes - PR1503S-T features bright tin-plated leads qualified to MIL-STD-202 Method 208 and rated for lead-free soldering. The DO-41 package withstands peak reflow temperatures up to 260°C for 10 seconds, consistent with IPC/JEDEC J-STD-020C Level 1 moisture sensitivity classification.

Can PR1503S-T be used in full-wave bridge configurations?

Yes - each PR1503S-T diode can serve as one leg of a discrete full-wave bridge. Its 200V VRRM and 50A IFSM make it suitable for 120VAC inputs; however, four devices are required per bridge, and total forward drop will be double that of a single diode (2.4V at 1.5A).

Why is PR1503S-T marked "NOT RECOMMENDED FOR NEW DESIGN"?

This designation reflects Diodes Incorporated's strategic shift toward higher-efficiency alternatives (e.g., Schottky or soft-recovery FREDs) for new projects. PR1503S-T remains fully qualified and supported for existing designs, with no obsolescence timeline announced and full parametric compliance maintained.