Diodes Incorporated PR1502S-A

Overview

PR1502S-A from Diodes Incorporated is a 1.5A fast recovery rectifier diode in DO-41 package, rated for 100V 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 rail generation.

For engineers reviewing the PR1502S-A datasheet, PR1502S-A pinout, PR1502S-A application, or PR1502S-A equivalent, key selection criteria include VRRM derating margin, trr-dependent switching loss in 60–100kHz flyback designs, thermal resistance (RθJA = 35 K/W), and DO-41 lead-form compatibility with legacy through-hole PCB layouts.

Technical Context

This device employs a diffused junction structure to achieve fast switching with low forward voltage drop and controlled reverse recovery behavior. Its 150ns trr (measured at IF = 0.5A, IR = 1.0A, Irr = 0.25A) enables reduced switching losses compared to standard recovery rectifiers in medium-frequency SMPS topologies.

The DO-41 package provides mechanical robustness and thermal performance suitable for ambient temperatures up to +150°C, with a 50A non-repetitive surge rating (8.3ms half-sine) supporting inrush current handling in unregulated input stages.

Key Specifications

Pinout & Package

DO-41 axial-leaded plastic package with cathode band marking; leads are bright tin-plated, solderable per MIL-STD-202 Method 208.

Key Features

Applications

Availability

PR1502S-A is available at Aetrix Electronics and suitable for offline AC/DC adapters, industrial control power supplies, and LED driver input stages requiring stable component supply with legacy DO-41 through-hole compatibility.

Supply support for PR1502S-A 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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The PR150x/S series targets cost-sensitive, high-volume power conversion applications where fast recovery, thermal robustness, and RoHS compliance are essential - particularly in legacy-design maintenance and mid-power auxiliary supply implementations.

FAQ

What is the maximum ambient temperature for continuous 1.5A operation?

PR1502S-A delivers its full 1.5A average forward current rating only when leads are maintained at ambient temperature at a distance of 9.5mm from the case, and ambient temperature does not exceed +50°C. At higher ambient temperatures, current must be derated per Figure 1 in the datasheet, reaching zero at +150°C.

Is PR1502S-A suitable for use in capacitive-input filter circuits?

Yes, but with 20% current derating as specified in the datasheet. In capacitive-input configurations, peak charging currents increase stress on the diode; the 50A IFSM rating helps absorb these transients, though thermal design must account for higher RMS current and ripple heating.

How does the 150ns reverse recovery time impact EMI in switching power supplies?

The 150ns trr reduces high-frequency ringing during turn-off, lowering radiated emissions near the switching node. When paired with proper snubbing and layout, it minimizes voltage overshoot across the diode and adjacent MOSFETs, easing EMI filter requirements in Class B conducted emission tests.

Does PR1502S-A have UL flammability certification?

Yes - the DO-41 package carries UL 94V-0 flammability classification, confirming self-extinguishing behavior after flame exposure. This meets safety requirements for end equipment certified to IEC/UL 62368-1 and similar standards governing power supply enclosures.