onsemi DF02S

Overview

DF02S from Diodes Incorporated is a 1.0A surface-mount standard recovery bridge rectifier with 200V peak repetitive reverse voltage (VRRM), 1.1V max forward voltage at 1.0A, and 10µA max reverse leakage at 25°C. It features glass-passivated die construction, 50A non-repetitive surge capability, and UL recognition (E364304) for use in AC/DC power supplies, LED drivers, and industrial control power stages.

For engineers reviewing the DF02S datasheet, DF02S pinout, DF02S application, or DF02S equivalent, key selection criteria include its 200V blocking rating, thermal resistance of 40°C/W, surface-mount DF-S package compatibility, and compliance with RoHS, halogen-free, and AEC-Q200-capable manufacturing standards.

Technical Context

The DF02S integrates four silicon diodes in a single-phase full-wave bridge configuration, enabling direct AC-to-DC conversion without external interconnection. Its standard recovery characteristic (typical trr not specified but consistent with standard recovery bridges) supports line-frequency operation up to 60Hz with minimal switching loss trade-off.

Designed for PCB-level mounting, it uses tin-plated terminals solderable per MIL-STD-202 Method 208 and operates across –55°C to +150°C junction temperature. The molded plastic DF-S package meets UL 94V-0 flammability and J-STD-020 Level 1 moisture sensitivity requirements.

Key Specifications

Pinout & Package

Package: DF-S - Surface-mount molded plastic package (7.4–7.9 mm × 6.2–6.5 mm × ~2.5 mm height), UL 94V-0 rated, with 4 tin-plated terminals and polarity marking on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with GBU2K and MB2S, the DF02S uniquely balances 200V blocking, SMT compatibility, UL recognition, and automotive-grade manufacturing-making it optimal for new industrial and consumer designs requiring certified, compact, and compliant rectification.

Availability

DF02S is available at Aetrix Electronics and suitable for AC/DC power supplies, LED driver input stages, and industrial control power modules requiring stable component supply, long-lifecycle support, and compliance with RoHS, halogen-free, and UL safety standards.

Supply support for DF02S 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, automotive, and consumer markets.

The DF-S bridge rectifier series targets cost-sensitive, high-volume AC/DC front-end applications where surface-mount integration, safety certification, and environmental compliance are mandatory design requirements.

FAQ

What is the maximum allowable ambient temperature for continuous operation of DF02S?

The DF02S is rated for continuous operation at ambient temperatures up to +40°C when delivering its full 1.0A average forward current. Derating begins above this point per Figure 1 in DS17001 Rev. 19–2: at +85°C ambient, the usable average current drops to approximately 0.6A due to thermal limitations imposed by its 40°C/W junction-to-ambient resistance.

Does DF02S support lead-free reflow soldering processes?

Yes, DF02S has a lead-free, tin-plated termination finish and is qualified for standard Pb-free reflow profiles per J-STD-020. Its moisture sensitivity level is rated at Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly, simplifying manufacturing logistics.

Can DF02S be used in automotive applications?

While DF02S itself is not AEC-Q200 qualified, Diodes Incorporated manufactures it in IATF 16949-certified facilities and offers AEC-Q200-compliant variants (e.g., DF02SA) with extended test documentation and change control. For automotive use, contact Diodes or Aetrix for PPAP-ready versions and qualification reports.

How does the DF-S package compare thermally to SMB or GBU packages?

The DF-S package offers a thermal resistance of 40°C/W (junction-to-ambient on 5.0mm² copper), which is higher than larger packages like GBU (≈25°C/W) but optimized for SMT density. Unlike SMB bridges (typically 0.8A rating), DF-S maintains 1.0A current capacity in a smaller footprint, trading some thermal margin for board space efficiency in space-constrained designs.