Diodes Incorporated SBL835

Overview

SBL835 from Diodes Incorporated is an 8.0A, 35V Schottky barrier rectifier in TO-220AC package, designed for low-voltage, high-frequency DC/DC conversion, freewheeling, and polarity protection circuits. It delivers VF = 0.70 V at 8 A and 25°C, supports IFSM = 200 A surge current, and exhibits RθJC = 6.9°C/W thermal resistance for heatsink-mounted operation.

For engineers reviewing the SBL835 datasheet, SBL835 pinout, SBL835 application, or SBL835 equivalent, key selection criteria include forward voltage drop at rated current, peak repetitive reverse voltage rating, thermal resistance to case, surge current capability, and TO-220AC mechanical compatibility with standard heatsinks.

Technical Context

The SBL835 operates as a unidirectional power rectifier with guard-ring-protected Schottky junction architecture, enabling fast switching and low conduction loss. Its 35 V VRRM rating targets 24 V and 32 V nominal bus systems, while the 200 A non-repetitive surge rating accommodates inductive load turn-off transients.

Thermal performance is defined by junction-to-case resistance of 6.9°C/W under heatsink mounting per Note 1, and junction capacitance is 700 pF at 4.0 V reverse bias and 1.0 MHz - critical for high-frequency snubberless designs and EMI-sensitive layouts.

Key Specifications

Pinout & Package

Package: TO-220AC - Molded plastic case with UL 94V-0 flammability rating, metal tab (Pin 1) electrically connected to anode, Pin 2 cathode terminal, and isolated metal tab for heatsink mounting.

Key Features

Applications

Availability

SBL835 is available at Aetrix Electronics and suitable for DC/DC converter output rectification, automotive body control module power supply, and industrial motor drive freewheeling requiring stable component supply and long-term production continuity.

Supply support for SBL835 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 SBL8xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical, medium-power industrial and automotive power conversion where low VF and high surge tolerance are mandatory.

FAQ

Is SBL835 RoHS compliant?

Yes, SBL835 features a lead-free finish and is RoHS compliant per EU Directive Annex Notes 5 and 7, with exemptions applied for glass and high-temperature solder per revision 13.2.2003. The device meets J-STD-020C moisture sensitivity Level 1 requirements.

Can SBL835 replace SBL840 in a 40 V design?

No - SBL835 has a 35 V VRRM rating and is unsuitable for 40 V applications. Using it in place of SBL840 risks premature reverse breakdown under normal operating voltage stress. Derating guidelines require ≥20% margin; 35 V parts should only be used in ≤28 V DC systems.

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

The datasheet specifies IF(AV) = 8 A at TC = 95°C. Operation at higher case temperatures requires derating per Figure 1: at TC = 110°C, average current must be reduced to ~6.5 A; at TC = 125°C, it falls to ~4.8 A. Heatsink design must maintain TC ≤ 95°C for full-rated current.

Does the metal tab carry electrical potential, and is insulation required?

Yes - the TO-220AC metal tab is electrically connected to the anode (Pin 1). If the heatsink is grounded or at a different potential, electrical isolation using mica washers or silicone pads is mandatory to prevent short circuits and ensure safety compliance.