Diodes Incorporated SDM4A30EP3-7B

Overview

SDM4A30EP3-7B from Diodes Incorporated is a 30 V, 4 A surface-mount Schottky barrier rectifier in X3-TSN1608-2 package, featuring 570 mV max forward voltage at 4 A, 250 µA max reverse leakage at 30 V, and 160 °C/W thermal resistance on standard FR-4 PCB. It serves as a low-loss blocking or boost diode in space-constrained portable power rails.

For engineers reviewing the SDM4A30EP3-7B datasheet, SDM4A30EP3-7B pinout, SDM4A30EP3-7B application, or SDM4A30EP3-7B equivalent, key selection criteria include forward voltage drop at rated current, high-temperature reverse leakage behavior, thermal resistance under defined PCB layout, and compatibility with 0.8 W to 2.1 W power dissipation limits depending on copper pad area.

Technical Context

This Schottky rectifier uses a planar metal–semiconductor junction optimized for low VF and suppressed IR drift over temperature. Its 107 pF junction capacitance at 4 V enables fast switching in DC-DC boost stages up to several MHz.

The device operates across –55 °C to +150 °C and supports repetitive peak forward surge current of 32 A (8.3 ms half-sine), making it suitable for transient-heavy input protection and synchronous rectification auxiliary paths where low conduction loss is critical.

Key Specifications

Pinout & Package

Package: X3-TSN1608-2 - ultra-compact surface-mount case measuring 1.60 mm × 0.80 mm × 0.25 mm (L × W × H), with NiAu-plated terminals and cathode dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SS33HE3/57T and RB055LAM-30TR, SDM4A30EP3-7B uniquely balances 4 A current handling, sub-0.6 V forward drop, and <1.3 mm² footprint-enabling compact, thermally efficient designs where both size and conduction loss are simultaneously constrained.

Availability

SDM4A30EP3-7B is available at Aetrix Electronics and suitable for USB-C PD input protection, portable DC-DC boost converters, and industrial sensor node power rails requiring stable component supply and consistent lead-free compliance.

Supply support for SDM4A30EP3-7B 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 SDM4A30EP3 belongs to Diodes' high-efficiency Schottky rectifier product line, engineered specifically for space- and thermal-constrained portable and industrial power conversion where low VF and controlled IR are critical.

FAQ

What is the maximum continuous forward current for SDM4A30EP3-7B at 100°C case temperature?

At TC = 100°C, the average rectified output current is approximately 2.5 A, as derived from Figure 4's derating curve. This value assumes mounting on a 1 inch square 2 oz. copper pad (RθJA = 60 °C/W). On minimal pad layout (RθJA = 160 °C/W), IO drops to ~1.3 A at the same temperature.

Does SDM4A30EP3-7B meet AEC-Q101 requirements for automotive use?

SDM4A30EP3-7B is not pre-qualified to AEC-Q101, but Diodes offers automotive-grade change control-including PPAP capability, IATF 16949 manufacturing, and AEC-Q101 qualification-for this part upon request. Customers must engage Diodes' automotive team to initiate the qualification process.

How does the X3-TSN1608-2 package compare to SOD-123 in board area and thermal performance?

X3-TSN1608-2 occupies 1.28 mm² (1.60 mm × 0.80 mm), roughly 40% smaller than SOD-123 (3.7 mm × 1.7 mm = 6.29 mm²). Its RθJA is 160 °C/W on minimal pads-comparable to SOD-123-but achieves 60 °C/W with 1 inch² copper, outperforming most SOD-123 variants limited to ~90–110 °C/W under identical conditions.

Can SDM4A30EP3-7B be used in synchronous rectification circuits?

No-SDM4A30EP3-7B is a passive Schottky rectifier, not a MOSFET-based synchronous rectifier controller or driver. It functions as a freewheeling or output rectifier in non-synchronous topologies. For synchronous rectification, a dedicated gate driver IC paired with a low-RDS(on) MOSFET is required.