Diodes Incorporated SBL530

Overview

SBL530 from Diodes Incorporated is a 5.0A, 30V Schottky barrier rectifier in TO-220AC package, featuring 0.55V forward voltage drop at 5.0A and 25°C, 175A non-repetitive surge capability, and guard ring die construction for transient protection-used in low-voltage, high-frequency inverters and polarity protection circuits.

For engineers reviewing the SBL530 datasheet, SBL530 pinout, SBL530 application, or SBL530 equivalent, key selection criteria include forward voltage drop, thermal resistance (3°C/W), peak repetitive reverse voltage (30V), surge current rating (175A), and TO-220AC mounting compatibility with heatsinks.

Technical Context

This discrete Schottky rectifier uses a guard ring die structure to enhance transient voltage immunity and reduce leakage under high dv/dt conditions. Its low V_F and low R_θJC enable high-efficiency operation in 50–60Hz and higher-frequency switching applications up to 100kHz.

Designed for single-phase, half-wave rectification with resistive or inductive loads, it requires 20% current derating for capacitive loads. Junction-to-case thermal resistance of 3°C/W assumes direct mounting on a heatsink per Note 1.

Key Specifications

Pinout & Package

Package: TO-220AC - Molded plastic case with UL 94V-0 flammability rating, tin-plated terminals solderable per MIL-STD-202 Method 208, and integral metal tab for heatsink mounting (Pin 1 = Anode, Pin 2 = Cathode, Case = Anode).

Key Features

Applications

Availability

SBL530 is available at Aetrix Electronics and suitable for DC power supply input stages, automotive polarity protection, motor drive freewheeling paths, and low-voltage inverter output stages requiring stable component supply despite its obsolete status.

Supply support for SBL530 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 SBL5xx series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, low-loss power conversion in industrial, automotive, and computing power supplies.

FAQ

Is SBL530 still in active production?

No. Diodes Incorporated officially discontinued SBL530 in August 2015 and marked it "OBSOLETE – PART DISCONTINUED" with "NO ALTERNATE PART" stated in the datasheet. Aetrix Electronics provides remaining inventory with full traceability and lifecycle support documentation.

What is the thermal performance of SBL530 without a heatsink?

Without heatsinking, SBL530's maximum continuous current drops significantly: at ambient 25°C, derating begins above ~1.5A due to R_θJC = 3°C/W and R_θCA ≈ 60°C/W (typical TO-220AC in free air), limiting usable power to <0.5W to avoid exceeding 150°C junction temperature.

Can SBL530 be used in place of a standard PN-junction rectifier?

Yes-SBL530 replaces 1N540x or similar 3A–6A silicon rectifiers where lower V_F, faster recovery, and higher efficiency are required. However, its 30V V_RRM limits use to ≤24V systems; it is unsuitable for 48V or 100V AC input stages.

Does SBL530 meet RoHS requirements?

Yes. Per datasheet Note 3, SBL530 has lead-free finish and complies with RoHS Directive 2002/95/EC revision 13.2.2003, including exemptions for glass and high-temperature solder per EU Annex Notes 5 and 7.