Diodes Incorporated SB330-T

Overview

SB330-T from Diodes Incorporated is a 3.0A, 30V Schottky barrier rectifier in DO-201AD package, featuring 0.74V forward voltage at 3.0A, 80A non-repetitive surge capability, and IEC 61000-4-2 ±15kV ESD protection. It serves as a low-loss freewheeling diode in DC-DC converters and polarity protection switch in automotive power supplies.

For engineers reviewing the SB330-T datasheet, SB330-T pinout, SB330-T application, or SB330-T equivalent, key selection criteria include its 30V VRRM rating, 0.74V VFM at rated current, thermal resistance of 30°C/W (junction-to-ambient), DO-201AD mechanical outline, and NRND status for new designs.

Technical Context

This Schottky rectifier uses guard ring die construction to enhance transient immunity and sustain 80A peak surge under 8.3ms half-sine conditions. Its low forward voltage drop minimizes conduction loss in high-frequency switching topologies.

Rated for continuous operation from –65°C to +125°C junction temperature, it exhibits 0.5mA peak reverse current at 25°C and 20mA at 100°C under 30V DC blocking, with typical junction-to-lead thermal resistance of 10°C/W on PCB-mounted leads.

Key Specifications

Pinout & Package

DO-201AD axial-leaded plastic package with cathode band marking; 1.1g mass, UL 94V-0 flammability rating, and tin-plated terminals solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB330-T, SS33HE3/57T offers SMT integration and marginally lower VFM but lacks axial-leaded mechanical robustness; SB330-13-F is electrically and mechanically identical but supplied in alternate reel configuration-neither resolves the NRND limitation for new designs.

Availability

SB330-T is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC power supplies, and consumer AC/DC adapters requiring stable component supply and RoHS-compliant Schottky rectification.

Supply support for SB330-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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

The SB3xx series belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-sensitive, high-efficiency power conversion in consumer, industrial, and automotive applications where low VFM and surge resilience are prioritized.

FAQ

What does "NRND" mean for SB330-T, and how does it affect design-in?

"NRND" (Not Recommended for New Design) indicates Diodes Incorporated no longer promotes SB330-T for newly initiated projects due to roadmap consolidation or newer alternatives. Existing designs may continue using it, but long-term supply assurance and technical support are not guaranteed beyond current inventory. Customers should consult Diodes' latest product advisories before committing to new BOMs.

Can SB330-T replace SB320-T in a 20V-rated circuit?

Yes - SB330-T has a 30V VRRM rating versus SB320-T's 20V, making it a safe over-spec replacement in 20V systems. Its 0.74V VFM is identical to SB320-T's 0.50V only at lower currents; at 3.0A, SB330-T's VFM is higher (0.74V vs. 0.50V), increasing conduction loss by ~0.72W. Thermal design must verify junction temperature remains within –65°C to +125°C limits.

Is SB330-T qualified to AEC-Q101 for automotive use?

No - SB330-T is not AEC-Q101 qualified. The datasheet explicitly states that automotive-qualified versions require separate PPAP-capable part numbers and IATF 16949 manufacturing. While it operates from –65°C to +125°C, its qualification status is limited to commercial/industrial reliability standards, not automotive stress testing or change control protocols.

How does the DO-201AD package affect thermal performance compared to SMC or SMA packages?

DO-201AD's axial-leaded construction provides higher thermal resistance: RθJA = 30°C/W vs. ~20°C/W for SMC and ~25°C/W for SMA. Its 10°C/W RθJL (junction-to-lead) assumes 12.7mm lead length with 63.5mm × 63.5mm copper pad - performance degrades significantly with shorter leads or smaller pads. For >2W dissipation, forced air or heatsinking is recommended, unlike surface-mount alternatives with better PCB thermal coupling.