Diodes Incorporated SB150-T

Overview

SB150-T from Diodes Incorporated is a 1.0A, 50V Schottky barrier rectifier in DO-41 plastic package, featuring 0.70V forward voltage at 1.0A, 40A non-repetitive surge capability, and guard ring die construction for transient protection-used in low-voltage DC/DC converter freewheeling paths and polarity protection circuits.

For engineers reviewing the SB150-T datasheet, SB150-T pinout, SB150-T application, or SB150-T equivalent, key selection criteria include its 50V reverse blocking rating, 0.70V V_F at rated current, DO-41 thermal resistance (R_θJL = 15°C/W), and RoHS-compliant bright tin-plated leads suitable for automated tape-and-reel assembly.

Technical Context

This discrete Schottky diode operates as a unidirectional power rectifier with metal–semiconductor junction architecture enabling low forward conduction loss and fast switching recovery. Its guard ring die structure enhances ruggedness against voltage transients without requiring external snubbers.

Designed for operation up to +125°C junction temperature, it delivers stable performance under repetitive 60Hz half-wave rectification and handles capacitive-load derated currents per JEDEC guidelines. Thermal path relies on lead-to-ambient conduction (R_θJA = 50°C/W) and direct junction-to-lead transfer (R_θJL = 15°C/W).

Key Specifications

Pinout & Package

DO-41 molded plastic package with axial leads, cathode band marking, and bright tin-plated terminals solderable per MIL-STD-202 Method 208. Weight: 0.3 g. UL 94V-0 flammability rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SB150-B and SS15, SB150-T offers optimized manufacturability for high-volume automated assembly via 5K tape-and-reel delivery while retaining DO-41's superior thermal conduction and mechanical robustness in vibration-prone environments.

Availability

SB150-T is available at Aetrix Electronics and suitable for DC/DC converter freewheeling, polarity protection, and low-voltage inverter output applications requiring stable component supply across automotive, industrial control, and IoT device production cycles.

Supply support for SB150-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, manufacturing, and sales operations across Asia, Europe, and North America.

The SBx50 series belongs to Diodes' general-purpose Schottky rectifier product line, engineered specifically for cost-sensitive, high-efficiency power conversion in consumer, industrial, and automotive auxiliary power supplies.

FAQ

What is the maximum junction temperature for SB150-T during continuous operation?

The SB150-T is rated for continuous operation up to +125°C junction temperature. This rating is validated under specified thermal conditions: 9.5mm lead length, free-air ambient, and measured at the lead temperature per Note 5 in DS23022. Derating is required above this temperature per Figure 1.

Is SB150-T qualified for automotive applications?

SB150-T itself is not AEC-Q101 qualified, but Diodes offers AEC-Q101 versions in the same SBx50 family (e.g., SB150TQ). The standard SB150-T uses the same die and DO-41 package as qualified variants and is commonly used in non-safety-critical automotive body electronics where full qualification is not mandated.

Can SB150-T replace 1N5819 in existing designs?

Yes-SB150-T matches 1N5819's 1A/40V rating with improved 50V V_RRM, lower 0.70V V_F, and higher 40A I_FSM. Mechanical compatibility is maintained (both DO-41), though layout review is advised due to differences in thermal impedance and reverse leakage behavior above 85°C.

What does the "-T" suffix indicate in SB150-T?

The "-T" suffix denotes tape-and-reel packaging: 5,000 units per 13-inch reel, compatible with standard pick-and-place equipment. This differs from "-A" (ammo pack) and "-B" (bulk), and ensures consistent feeding accuracy and ESD-safe handling in high-speed SMT lines.