Diodes Incorporated DF1506S

Overview

DF1506S from Diodes Incorporated is a surface-mount standard recovery bridge rectifier with 600 V peak repetitive reverse voltage, 1.5 A average forward current, and 1.1 V maximum forward voltage per element at 1.5 A. It features glass-passivated die construction, 50 A non-repetitive surge capability, and UL recognition (E364304), used in AC/DC power supplies for industrial control modules.

For engineers reviewing the DF1506S datasheet, DF1506S pinout, DF1506S application, or DF1506S equivalent, key selection criteria include its 600 V VRRM rating, thermal resistance of 40 °C/W, 25 pF typical junction capacitance, and DF-S package compatibility with automated SMT assembly.

Technical Context

This single-phase, full-wave bridge rectifier integrates four standard recovery diodes in one molded plastic DF-S package. Its glass-passivated junction ensures stable reverse leakage (10 µA max at 25°C, 500 µA at 125°C) and robust surge handling up to 50 A (8.3 ms half-sine).

The device operates across –55°C to +150°C and exhibits predictable derating: IO drops to ~1.0 A at +100°C ambient. Thermal resistance (RθJA = 40 °C/W) is measured on a PCB with 5.0 mm² copper land, defining practical power dissipation limits in compact layouts.

Key Specifications

Pinout & Package

Package: DF-S, surface-mount molded plastic (UL 94V-0), 7.4–7.9 mm × 6.2–6.5 mm × 2.4–2.6 mm footprint, tin-plated terminals, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU6K and MB10F, DF1506S uniquely balances SMT manufacturability, 1.5 A continuous rating, and 40 °C/W thermal performance in the compact DF-S package-making it optimal for new industrial and consumer power supply designs requiring automated assembly and thermal headroom.

Availability

DF1506S is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, consumer wall adapters, and embedded control board power inputs requiring stable component supply and RoHS-compliant sourcing.

Supply support for DF1506S 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.

DF1506S belongs to Diodes' DF-S series of surface-mount bridge rectifiers, designed specifically for cost-sensitive, high-volume AC/DC front-end applications demanding UL recognition, surge resilience, and SMT process compatibility.

FAQ

What is the maximum allowable junction temperature for DF1506S?

The DF1506S has a specified operating junction temperature range of –55°C to +150°C. This limit is enforced by its thermal resistance (RθJA = 40 °C/W) and power dissipation constraints. At 1.5 A IO and 1.1 V VFM, power dissipation is ~1.65 W; with 40 °C/W RθJA, junction rise above ambient is ~66°C-so ambient must stay below +84°C to remain within the 150°C TJ limit.

Can DF1506S replace DF1504S in an existing design?

Yes, DF1506S is a direct upgrade from DF1504S (400 V VRRM) with identical DF-S package, pinout, and thermal characteristics. The higher 600 V VRRM improves margin against line transients and enables use in 230 VAC systems without redesign. No layout or thermal changes are needed, provided the original design did not rely on the lower VRRM for specific clamping behavior.

Is DF1506S qualified for automotive applications?

No-DF1506S is not AEC-Q101 qualified. While Diodes offers automotive-grade variants (e.g., DF1506SA), the standard DF1506S lacks PPAP documentation, IATF 16949 manufacturing evidence, and extended qualification testing. It is intended for industrial, consumer, and commercial applications where automotive reliability standards do not apply.

What is the recommended PCB pad layout for DF1506S?

Diodes specifies a suggested pad layout for the DF-S package with 5.0 mm² copper land areas per terminal to achieve the rated RθJA of 40 °C/W. Pad dimensions should follow the outline drawing: 7.65 mm × 6.35 mm overall, with 2.5 mm center-to-center spacing between ~AC1 and ~AC2, and +DC/–DC terminals aligned accordingly. Full details are published at diodes.com/package-outlines.html under "DF-S".