Diodes Incorporated SF30CG-B

Overview

SF30CG-B from Diodes Incorporated is a 3.0A, 150V super-fast glass passivated rectifier diode in DO-201AD package, featuring 35ns reverse recovery time, 0.95V forward voltage at 3.0A, and 125A non-repetitive surge rating-used in high-frequency AC/DC adapters and switch-mode power supply output stages.

For engineers reviewing the SF30CG-B datasheet, SF30CG-B pinout, SF30CG-B application, or SF30CG-B equivalent, key selection criteria include peak repetitive reverse voltage (150V), fast recovery performance (35ns), thermal resistance (32°C/W), and DO-201AD mechanical compatibility in compact power conversion designs.

Technical Context

This super-fast rectifier employs a diffused junction and glass passivated die construction to achieve low reverse leakage (5.0µA @25°C) and stable switching behavior under high dv/dt conditions. Its 35ns reverse recovery time is measured per JEDEC standard (IF=0.5A, IR=1.0A, Irr=0.25A), enabling efficient operation in 50–100kHz SMPS topologies.

The device operates across –65°C to +150°C with a junction-to-ambient thermal resistance of 32°C/W under standard mounting conditions (leads held at ambient 9.5mm from case). Total capacitance is 75pF at 1.0MHz and 4.0V reverse bias, supporting minimal ringing in high-speed rectification paths.

Key Specifications

Pinout & Package

DO-201AD axial-leaded plastic package with cathode band marking; 1.12g mass; UL 94V-0 flammability rating; tin-plated leads solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar super-fast rectifier applications.

Compared with STTH3L06S and ES3D-E3/57T, SF30CG-B offers optimal balance of 150V rating, 0.95V forward drop, and DO-201AD compatibility-making it preferred for cost-sensitive, space-constrained 100–240VAC input SMPS where voltage margin and thermal design are tightly coupled.

Availability

SF30CG-B is available at Aetrix Electronics and suitable for AC/DC adapters, USB PD power supplies, industrial SMPS auxiliary rails, and LED driver constant-current stages requiring stable component supply and DO-201AD form factor consistency.

Supply support for SF30CG-B 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

SF30CG-B belongs to the SF30xG super-fast rectifier product line, engineered for high-efficiency, high-frequency power conversion in consumer, industrial, and computing power supplies.

FAQ

Is SF30CG-B RoHS compliant?

Yes, SF30CG-B features lead-free finish and meets RoHS Directive 2011/65/EU requirements per Note 4 in the datasheet, including exemption for high-temperature soldering processes under Annex III.

What is the derating curve for SF30CG-B at elevated ambient temperatures?

SF30CG-B delivers 3.0A average forward current at TA = 55°C; current must be linearly derated to zero at 150°C, following the curve in Figure 1-valid only when leads are maintained at ambient temperature at 9.5mm from the case body.

Can SF30CG-B replace a Schottky diode in a 12V output rail?

Only if the application does not require <0.5V forward voltage or zero reverse recovery charge. SF30CG-B's 0.95V V_F and 35ns trr make it suitable for higher-voltage outputs (≥15V) where Schottky leakage or thermal instability is problematic.

Does SF30CG-B have a specified junction-to-case thermal resistance?

No-only junction-to-ambient (32°C/W) is specified in the datasheet. Junction-to-case resistance is not published; thermal design must rely on θ_JA under standardized mounting conditions described in Note 1.