Diodes Incorporated SDMK0340L-7

Overview

SDMK0340L-7 from Diodes Incorporated is a surface-mount Schottky barrier diode in SOD-323 package, rated for 40 V peak reverse voltage and 30 mA average forward current, with typical forward voltage of 290 mV at 1 mA and reverse leakage ≤0.5 μA at 30 V. It serves as a low-loss rectifier or signal clamping device in space-constrained DC-DC converter feedback paths and USB port protection circuits.

For engineers reviewing the SDMK0340L-7 datasheet, SDMK0340L-7 pinout, SDMK0340L-7 application, or SDMK0340L-7 equivalent, key selection criteria include its 290–370 mV VF at 1 mA, 2 pF capacitance at 1 V reverse bias, guard ring die construction for ESD robustness, RoHS-compliant green molding compound, and SOD-323 thermal resistance of 625 °C/W.

Technical Context

This Schottky diode employs a planar guard ring die structure to suppress edge breakdown and improve transient immunity-critical for low-voltage logic interface protection. Its low 290 mV typical forward drop minimizes conduction loss in 1.8 V/3.3 V rail clamping and reverse polarity protection circuits.

The device exhibits 2 pF junction capacitance at 1 V reverse bias and 10 ns typical reverse recovery time (trr), enabling use in high-frequency switching applications up to ~100 MHz where parasitic capacitance must be tightly controlled.

Key Specifications

Pinout & Package

Package: SOD-323 - ultra-small plastic surface-mount case (2.3–2.7 mm length × 1.2–1.4 mm width × 0.25–0.35 mm height), moisture sensitivity level 1, matte tin-plated leads, cathode indicated by band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAT54C-7-F and NSR0330P2T5G, SDMK0340L-7 uniquely balances 40 V blocking, ultra-low 290 mV VF, and SOD-323 compatibility-making it optimal for compact 3.3 V/5 V mixed-signal interfaces requiring both low loss and robust transient immunity.

Availability

SDMK0340L-7 is available at Aetrix Electronics and suitable for USB interface protection, DC-DC converter feedback isolation, and low-voltage logic-level shifting requiring stable component supply across automotive infotainment, industrial IoT sensor nodes, and portable medical devices.

Supply support for SDMK0340L-7 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 SDMK series targets high-reliability, low-power signal conditioning applications-specifically engineered for space-constrained, low-voltage systems demanding low VF, low CT, and robust ESD performance.

FAQ

What is the maximum continuous forward current rating for SDMK0340L-7?

The SDMK0340L-7 is rated for 30 mA average forward current (IF) at TA = 25 °C. Derating is required above 25 °C ambient per the power derating curve: power dissipation drops linearly to zero at 125 °C, with RθJA = 625 °C/W defining the slope.

Does SDMK0340L-7 have a specified reverse recovery time (trr)?

Yes-Figure 4 in the datasheet specifies a typical reverse recovery time (trr) of 10 ns at IF = 10 mA, VR = 3 V, and di/dt = 100 A/μs. This value is measured under JEDEC-standard conditions and confirms suitability for high-frequency switching applications up to ~100 MHz.

Is SDMK0340L-7 compatible with lead-free reflow soldering processes?

Yes-SDMK0340L-7 uses matte tin-plated leads over Alloy 42, qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity. Peak reflow temperature is rated to 260 °C, and the device meets IPC/JEDEC standards for solderability and thermal endurance.

How is polarity identified on the SDMK0340L-7 package?

Polarity is marked by a visible cathode band on the top surface of the SOD-323 package. Per mechanical drawings, the band aligns with the cathode terminal; the unmarked end is the anode. This matches standard SOD-323 orientation used in automated optical inspection (AOI) and pick-and-place systems.