Diodes Incorporated PR1503S-A

Overview

PR1503S-A 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 DC-DC converter input stages.

For engineers reviewing the PR1503S-A datasheet, PR1503S-A pinout, PR1503S-A application, or PR1503S-A equivalent, key selection criteria include VRRM derating margin, trr-dependent switching loss in 50–100kHz SMPS designs, thermal resistance (RθJA = 35 K/W), and DO-41 lead-form compatibility with through-hole PCB layouts.

Technical Context

This device employs a diffused junction structure to achieve fast switching with low forward conduction loss and controlled minority-carrier lifetime. Its 150ns reverse recovery time (trr) is measured under standardized conditions (IF = 0.5A, IR = 1.0A, Irr = 0.25A), enabling use in medium-frequency rectification where diode turn-off loss must be minimized.

The PR1503S-A supports single-phase, half-wave rectification at 60Hz with 1.5A average output current at TA = 50°C, and withstands non-repetitive 50A surge current (8.3ms half-sine). It is RoHS-compliant with bright tin-plated leads and UL 94V-0 molded plastic case.

Key Specifications

Pinout & Package

DO-41 axial-leaded plastic package with cathode band marking. Standard lead spacing accommodates 0.4" (10.16 mm) PCB hole centers. Cathode terminal identified by painted band; anode is unmarked end.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Compared with STTH1L06 and MUR120, the PR1503S-A balances 200V blocking, 1.5A current capacity, and 150ns trr for cost-sensitive 50–100kHz AC/DC applications - offering optimal trade-off between surge robustness, thermal performance, and switching loss.

Availability

PR1503S-A is available at Aetrix Electronics and suitable for AC/DC adapter input rectification, industrial control power supplies, DC-DC converter input stages, and LED driver bulk rectification requiring stable component supply and long-term manufacturing continuity.

Supply support for PR1503S-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 PR1503S-A belongs to the PR150x/S fast recovery rectifier product line, engineered specifically for cost-effective, thermally robust AC/DC front-end rectification in space-constrained through-hole power supplies.

FAQ

What is the maximum ambient temperature at which PR1503S-A can deliver its full 1.5A rated current?

The PR1503S-A delivers 1.5A average forward current only when ambient temperature is maintained at 50°C, with leads held at ambient temperature at a distance of 9.5mm from the case. Above 50°C, current must be linearly derated per Figure 1 - reaching zero at approximately 175°C ambient.

Is PR1503S-A suitable for use in capacitive-input filter circuits?

No - the datasheet explicitly states that for capacitive loads, the average rectified current must be derated by 20%. This is due to increased peak current stress and reduced conduction angle, which elevate junction temperature beyond the rated thermal limit under standard test conditions.

Does PR1503S-A have a qualified automotive grade variant?

No - PR1503S-A is not AEC-Q101 qualified and is marked "NOT RECOMMENDED FOR NEW DESIGN" in the datasheet. Diodes Incorporated does not offer an automotive-grade version of this specific part number; alternative AEC-Q101 rectifiers such as the SB120 or B120 series should be considered for automotive applications.

How does the 150ns reverse recovery time impact EMI in switch-mode power supplies?

A 150ns trr produces measurable reverse recovery current spikes during MOSFET turn-on, increasing high-frequency common-mode noise. Layout practices - including minimized loop area, snubber networks, and proper grounding - are essential to contain EMI; slower diodes worsen this, while sub-100ns devices reduce it but increase cost and potential ringing.