Diodes Incorporated SR304-T-F

Overview

SR304-T-F from Diodes Incorporated is a high-current Schottky barrier rectifier in DO-201AD package, rated for 40 V peak repetitive reverse voltage (VRRM), 3.0 A average rectified output current at 95°C lead temperature, and 80 A non-repetitive peak forward surge current (IFSM). It delivers low forward voltage drop (0.55 V @ 3.0 A) and low thermal resistance (20 °C/W), enabling efficient power conversion in DC/DC front-end and AC/DC secondary-side rectification.

For engineers reviewing the SR304-T-F datasheet, SR304-T-F pinout, SR304-T-F application, or SR304-T-F equivalent, key selection criteria include its axial-leaded DO-201AD mechanical form, 0.55 V VF at 3 A, 40 V blocking capability, 80 A surge rating, and suitability for high-efficiency 12–24 V output rectification where low conduction loss and thermal management are critical.

Technical Context

This device operates as a unidirectional power rectifier with metal–semiconductor junction architecture, optimized for low forward voltage and fast switching without minority-carrier storage delay. Its guard ring structure enhances transient voltage robustness, while the DO-201AD axial package supports vertical PCB mounting with 1.27 mm lead length for defined thermal resistance.

Electrical behavior is characterized under single-phase half-wave 60 Hz resistive/inductive load conditions; capacitive loads require 20% current derating. The 300 pF typical junction capacitance and 1.0 mA peak reverse current at 25°C support stable operation in medium-frequency SMPS outputs up to ~100 kHz.

Key Specifications

Pinout & Package

DO-201AD axial-leaded plastic package per UL 94V-0; cathode identified by band; leads solderable per MIL-STD-202, Method 208; weight ≈1.2 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current Schottky rectifier applications.

Compared with SB340-T-F, SR304-T-F offers slightly lower thermal rating but identical electrical specs and legacy axial compatibility; versus SS34-E3/57T, it retains through-hole serviceability and mechanical robustness at the cost of manual assembly overhead.

Availability

SR304-T-F is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converter outputs, automotive auxiliary supplies, and industrial battery chargers requiring stable component supply and proven field reliability.

Supply support for SR304-T-F 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-efficiency power management and signal integrity solutions.

SR304-T-F belongs to the SR3xx series of high-current Schottky rectifiers designed for cost-effective, thermally robust secondary-side rectification in mid-power AC/DC and isolated DC/DC converters.

FAQ

What is the maximum allowable junction temperature for SR304-T-F?

The absolute maximum junction temperature is +150°C, consistent with its rated operating temperature range of -65°C to +150°C. Derating curves in the datasheet define safe current limits based on lead temperature (TL), not case or ambient, due to its axial lead thermal path design.

Is SR304-T-F suitable for synchronous rectification circuits?

No - SR304-T-F is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or driver. It functions as a freewheeling or output rectifier in non-synchronous topologies only; synchronous designs require active gate control and timing circuitry.

Does SR304-T-F have a qualified AEC-Q101 rating for automotive use?

No - SR304-T-F is not AEC-Q101 qualified. While its -65°C to +150°C operating range meets automotive ambient requirements, it lacks the stress-test validation and process controls required for automotive-grade qualification.

Can SR304-T-F replace SR303-T-F in an existing design?

Yes - SR304-T-F shares identical package, pinout, and thermal characteristics with SR303-T-F, differing only in VRRM (40 V vs. 30 V) and VR(RMS) (28 V vs. 21 V). It provides higher reverse voltage margin and is backward compatible where 40 V blocking suffices.