Diodes Incorporated DF1504M

Overview

DF1504M from Diodes Incorporated is a 1.5A glass passivated bridge rectifier with 400V peak repetitive reverse voltage (VRRM), 1.1V forward voltage drop at 1.5A, and 50A non-repetitive surge capability - used in AC/DC power supplies for industrial control panels requiring compact, PCB-mountable full-wave rectification.

For engineers reviewing the DF1504M datasheet, DF1504M pinout, DF1504M application, or DF1504M equivalent, key selection criteria include VRRM derating for capacitive loads, thermal resistance (40°C/W) on standard 13×13mm copper pads, and UL recognition (E94661) for safety-compliant designs.

Technical Context

This single-phase, full-wave bridge rectifier integrates four silicon diodes in a monolithic DF-M molded plastic package with tin-plated terminals. It operates under 60Hz resistive or inductive loads, with mandatory 20% current derating for capacitive loads per specification.

Thermal performance is defined for mounting on 13×13mm, 0.03mm-thick PCB copper land areas; junction-to-ambient thermal resistance is 40°C/W. Reverse leakage remains ≤10µA at 25°C and ≤500µA at 125°C under rated DC blocking voltage.

Key Specifications

Pinout & Package

Package: DF-M molded plastic case (UL 94V-0), dimensions 7.4–7.9 mm (L) × 6.2–6.5 mm (W) × 2.4–3.4 mm (H), weight ≈0.38 g, lead-free and RoHS compliant (Date Code 0532+).

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU4K and KBP204, DF1504M offers optimal balance of compact DF-M footprint, 40°C/W thermal performance, and precise 400V rating for 230VAC-derived supplies - minimizing board area while avoiding unnecessary voltage overhead or thermal penalty.

Availability

DF1504M is available at Aetrix Electronics and suitable for industrial PLC power supplies, AC-DC adapters for test equipment, and motor drive control boards requiring stable component supply and UL-recognized safety compliance.

Supply support for DF1504M 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.

The DF-series bridge rectifiers are designed for cost-effective, space-efficient AC/DC conversion in industrial, appliance, and instrumentation applications where UL recognition and robust surge handling are essential.

FAQ

Is DF1504M RoHS compliant and lead-free?

Yes, DF1504M features a lead-free finish and is RoHS compliant per EU Directive 2002/95/EC (RoHS revision 13.2.2003), with exemptions applied for glass and high-temperature solder per Annex Notes 5 and 7. Compliance applies to date codes 0532 and later.

What is the recommended PCB pad layout for thermal performance?

For rated 1.5A operation at 40°C ambient, use 13×13mm copper land areas per terminal (minimum 0.03mm thickness). Larger or thermally connected copper pours significantly improve current capacity and reduce junction temperature.

Can DF1504M be used with capacitive loads?

No - the datasheet explicitly requires 20% derating of average output current (to 1.2A) when used with capacitive loads due to increased peak currents and stress on internal diodes. Use only with resistive or inductive loads unless derated accordingly.

Why is DF1504M marked "NOT RECOMMENDED FOR NEW DESIGN"?

This designation indicates Diodes Incorporated has introduced newer-generation alternatives (e.g., higher efficiency, lower VFM, or enhanced surge capability) and no longer recommends DF1504M for new product development - though it remains fully supported for existing designs and legacy supply chain continuity.