Diodes Incorporated SBR8A45SP5-13

Overview

SBR8A45SP5 from Diodes Incorporated is an 8A Super Barrier Rectifier (SBR®) in PowerDI5 package, designed specifically as a bypass diode for photovoltaic modules. It delivers 45V peak reverse voltage, 0.57V typical forward voltage at 8A/125°C, and is rated for +200°C maximum junction temperature-enabling reliable operation in high-temperature solar string environments.

For engineers reviewing the SBR8A45SP5 datasheet, SBR8A45SP5 pinout, SBR8A45SP5 application, or SBR8A45SP5 equivalent, key selection criteria include thermal resistance (R_θJL = 3°C/W), high-temperature leakage performance (0.3mA @ 45V/125°C), and its patented SBR technology enabling lower VF than Schottky alternatives without soft recovery trade-offs.

Technical Context

This device implements Diodes' proprietary Super Barrier Rectifier architecture-a planar-structured, low-VF alternative to Schottky diodes with improved high-temperature stability and reduced reverse recovery charge. Unlike conventional Schottkys, it avoids metal-semiconductor junction limitations by using a doped polysilicon barrier layer.

It is optimized for unidirectional DC current blocking and conduction in series-connected PV strings, where reverse-biased operation must sustain full string voltage while minimizing thermal runaway risk under partial shading. Its R_θJC = 8°C/W (FR-4 PCB) and R_θJL = 3°C/W support direct lead-sink thermal management in compact module-level designs.

Key Specifications

Pinout & Package

Package: PowerDI5 - surface-mount, thermally enhanced plastic package with exposed leadframe for low R_θJL; dimensions per Diodes outline drawing (D=3.966mm, E=6.51mm, W=1.255mm, L=0.85mm); RoHS-compliant, halogen-free, matte tin annealed finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SBRT8A45SP5-13, the SBR8A45SP5 offers identical performance at lower qualification cost-but lacks automotive documentation; versus MBR845FCT, it delivers 0.15V lower VF and 5× lower high-T leakage, directly improving system efficiency and thermal safety in demanding PV bypass roles.

Availability

SBR8A45SP5 is available at Aetrix Electronics and suitable for photovoltaic bypass protection, off-grid solar charge controllers, high-temperature energy storage systems, and DC string monitoring interfaces requiring stable component supply across multi-year solar deployments.

Supply support for SBR8A45SP5 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 SBR® product line was developed to replace Schottky rectifiers in high-efficiency, high-reliability power conversion-specifically targeting solar, computing, and industrial applications where thermal stability and low forward voltage are critical.

FAQ

What is the maximum allowable ambient temperature for continuous 8A operation?

At 8A DC, the device requires derating per Fig.6. With R_θJA = 60°C/W (polyimide PCB), maximum ambient is 125°C for T_J ≤ 200°C. On FR-4 (R_θJA = 102°C/W), ambient must be ≤ 95°C. Thermal design must ensure lead temperature does not exceed 175°C per note 8.

Is SBR8A45SP5 suitable for use in AEC-Q101 qualified automotive solar applications?

No-SBR8A45SP5 is not AEC-Q101 qualified. For automotive applications, Diodes specifies SBRT8A45SP5-13, which uses the same die but undergoes additional stress testing, PPAP documentation, and IATF 16949-controlled manufacturing. Use only the "T" suffix variant for automotive solar roof or EV auxiliary systems.

How does the PowerDI5 package improve thermal performance over TO-252 or SO-8?

PowerDI5's exposed cathode leadframe provides a direct thermal path to PCB copper with R_θJL = 3°C/W-over 2× better than TO-252 (R_θJL ≈ 7°C/W). Its low profile (1.15mm height) and symmetric lead geometry also reduce mechanical stress during thermal cycling in outdoor PV environments.

Can SBR8A45SP5 replace standard Schottky diodes in existing solar designs without layout changes?

Yes-PowerDI5 footprint matches industry-standard DPAK (TO-252) land patterns, and pinout (anode/cathode/tab) is identical. However, due to lower VF and higher T_J rating, thermal relief pads should be verified for 200°C operation, and solder reflow profiles must accommodate matte tin annealed finish per J-STD-020 Level 1.