Diodes Incorporated DF1504S-T

Overview

DF1504S-T from Diodes Incorporated is a surface-mount standard recovery bridge rectifier with 400 V peak repetitive reverse voltage (VRRM), 1.5 A average forward current (IO), and 1.1 V maximum forward voltage (VFM) per element, designed for AC/DC conversion in compact power supplies and industrial control systems.

For engineers reviewing the DF1504S-T datasheet, DF1504S-T pinout, DF1504S-T application, or DF1504S-T equivalent, key selection criteria include its 50 A non-repetitive surge rating, 40 °C/W junction-to-ambient thermal resistance, glass-passivated die construction, and DF-S package compatibility with automated SMT assembly.

Technical Context

This single-phase, full-wave bridge rectifier integrates four silicon diodes in a monolithic DF-S molded plastic package. It operates across -55 °C to +150 °C and supports resistive or inductive loads at 60 Hz without derating; capacitive loads require 20% current derating.

The device delivers 1.5 A average output under +40 °C ambient conditions, with typical total capacitance of 25 pF per element at 1 MHz and 4.0 V reverse bias. Its I²t fusing rating is 10.4 A²s for t < 8.3 ms half-sine surges.

Key Specifications

Pinout & Package

DF1504S-T uses the DF-S surface-mount package: molded plastic body (UL 94V-0), 7.4–7.9 mm length, 6.2–6.5 mm width, 1.0–1.2 mm height, with tin-plated solderable terminals and polarity marked on case.

Key Features

Applications

Availability

DF1504S-T is available at Aetrix Electronics and suitable for industrial power supplies, consumer AC adapters, and automotive body control modules requiring stable component supply with consistent DF-S package dimensions and RoHS-compliant sourcing.

Supply support for DF1504S-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-reliability power management, signal integrity, and protection solutions.

The DF-series bridge rectifiers are engineered for surface-mount AC/DC conversion in cost-sensitive, space-constrained applications where thermal robustness and surge resilience are essential.

FAQ

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

DF1504S-T delivers its rated 1.5 A average forward current only at TA = +40 °C, as specified in the datasheet. At higher ambient temperatures, output current must be derated per Figure 1 - e.g., to ~1.1 A at +85 °C - due to thermal limitations imposed by its 40 °C/W RθJA and 150 °C max junction temperature.

Does DF1504S-T support capacitive-input filter designs?

Yes, but with mandatory 20% current derating per the datasheet. Capacitive-input filters generate high peak currents that increase thermal stress; therefore, the 1.5 A rating applies only to resistive or inductive loads. For capacitive loads, maximum continuous IO is reduced to 1.2 A to ensure safe junction temperature margins.

How is polarity identified on the DF-S package?

Polarity is marked directly on the case: a white bar or "+" symbol indicates the +DC terminal, while the adjacent ~AC1 and ~AC2 pins are unmarked but positioned symmetrically across the package centerline. The -DC terminal is opposite +DC and shares the same side as the cathode-side marking per Diodes' standard DF-S top-view diagram.

Is DF1504S-T qualified to AEC-Q101 for automotive use?

No - DF1504S-T is not AEC-Q101 qualified. While it operates from -55 °C to +150 °C and is manufactured in IATF 16949-certified facilities, Diodes explicitly states that AEC-Q101 qualification requires separate PPAP submission and change control; this part is listed as "for automotive applications requiring specific change control… please contact us" - indicating qualification is not inherent.