Diodes Incorporated SBL1050

Overview

SBL1050 from Diodes Incorporated is a 10A, 50V Schottky barrier rectifier in TO-220AC package, designed for low-voltage, high-frequency power conversion. It delivers 0.60V forward voltage at 10A/25°C, 250A non-repetitive surge capability, and 700pF junction capacitance-enabling efficient free-wheeling, polarity protection, and DC-DC converter output rectification in industrial power supplies.

For engineers reviewing the SBL1050 datasheet, SBL1050 pinout, SBL1050 application, or SBL1050 equivalent, key selection criteria include its 50V VRRM rating, 3.5°C/W thermal resistance (junction-to-case), 10A average output current at TC = 95°C, and RoHS-compliant bright tin terminals suitable for MIL-STD-202 soldering.

Technical Context

The SBL1050 uses a Schottky barrier chip with guard ring die construction to suppress transient-induced failure and improve ruggedness. Its unidirectional single-diode topology operates in half-wave rectification mode with no reverse recovery time, eliminating switching losses in high-frequency inverters and synchronous buck converters.

Thermal performance is defined by mounting on a heatsink (R_θJC = 3.5°C/W), and electrical derating applies: capacitive loads require 20% IO reduction, while forward current drops to ~5.5A at TC = 125°C per Fig. 1.

Key Specifications

Pinout & Package

Package: TO-220AC - Molded plastic case (UL 94V-0), 2.24g weight, with isolated metal tab (Pin 1 = anode, Pin 2 = cathode). Mounting requires heatsink contact to tab for thermal management.

Key Features

Applications

Availability

SBL1050 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive freewheeling circuits, telecom polarity protection, and low-voltage inverter output stages requiring stable component supply despite end-of-life status.

Supply support for SBL1050 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

The SBL10xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 5–60V power conversion where low VFM and high surge tolerance are mandatory.

FAQ

Is SBL1050 still in production?

No. Diodes Incorporated officially discontinued the SBL1050 in August 2015, as confirmed in DS23042 Rev. 5. It is marked "OBSOLETE – PART DISCONTINUED" with no recommended alternate part listed in the datasheet. Aetrix Electronics maintains legacy inventory with full traceability and extended lifecycle support.

What is the thermal interface requirement for SBL1050?

The SBL1050 requires mechanical mounting of its metal tab (Pin 1/anode) to a heatsink using thermal compound and hardware. R_θJC = 3.5°C/W assumes full tab contact; insufficient clamping pressure or oxide layers increase effective thermal resistance and risk thermal runaway at full 10A load.

Can SBL1050 replace SBL1045 or SBL1060 in existing designs?

Yes-SBL1050 is pin- and footprint-compatible with other SBL10xx devices in TO-220AC. Its 50V VRRM sits between SBL1045 (45V) and SBL1060 (60V); substituting it for SBL1045 adds 5V margin but may slightly increase VFM (0.60V vs. 0.55V typ.), affecting efficiency in low-voltage rails.

Does SBL1050 have avalanche rating or repetitive surge capability?

No. The SBL1050 specifies only non-repetitive 8.3ms IFSM = 250A (JEDEC method). It lacks rated repetitive surge current or avalanche energy (EAS) specification. For applications with frequent overcurrent events, external fusing or current limiting is required to prevent cumulative degradation.