Diodes Incorporated SDMP0340LT-7-F

Overview

SDMP0340LT-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT-523 package, rated for 40 V peak reverse voltage, 30 mA continuous forward current, and 290–370 mV forward voltage at 1 mA-ideal for low-voltage logic clamping and signal rectification in space-constrained portable electronics.

For engineers reviewing the SDMP0340LT-7-F datasheet, SDMP0340LT-7-F pinout, SDMP0340LT-7-F application, or SDMP0340LT-7-F equivalent, key selection criteria include its low VF (290–370 mV), 2 pF capacitance at 1 V, guard ring construction for transient robustness, RoHS-compliant matte tin plating, and thermal resistance of 833°C/W on FR-4.

Technical Context

This Schottky diode employs guard ring die construction to suppress edge breakdown and improve transient immunity-critical for I/O protection in low-voltage digital interfaces. Its low 290–370 mV forward voltage enables efficient operation at logic-level signals (e.g., 1.8 V/3.3 V rails) without significant voltage drop penalty.

With only 2 pF junction capacitance at 1 V reverse bias and 1.0 µA leakage at 10 V, it supports high-speed signal routing and low-noise biasing. The SOT-523 package (0.002 g) delivers minimal parasitic inductance and thermal mass, enabling fast switching and compact layout in wearables and IoT sensor nodes.

Key Specifications

Pinout & Package

Package: SOT-523 - ultra-small plastic surface-mount case (1.60 × 0.80 × 0.50 mm), UL 94V-0 rated, moisture sensitivity level 1, lead-free matte tin finish over Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAT54C-7-F and NSR0340HT1G, SDMP0340LT-7-F offers the lowest guaranteed VF (290 mV min) and strictest IR spec (≤1.0 µA), making it optimal for ultra-low-power, precision-bias applications where leakage and voltage drop directly impact system accuracy.

Availability

SDMP0340LT-7-F is available at Aetrix Electronics and suitable for USB interface protection, low-voltage logic translation, RF detector biasing, and wearable sensor power management requiring stable component supply and full RoHS compliance.

Supply support for SDMP0340LT-7-F 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.

This device belongs to Diodes' SDMP series of ultra-miniature Schottky diodes, engineered specifically for space-constrained, low-power portable electronics where size, leakage, and forward voltage are critical.

FAQ

What is the maximum reverse voltage this diode can withstand continuously?

The SDMP0340LT-7-F has a peak repetitive reverse voltage (VRRM) rating of 40 V. This is the maximum instantaneous reverse voltage it can block repeatedly without breakdown under normal operating conditions at 25°C ambient. Derating applies above 25°C per the power derating curve in Figure 5 of the datasheet.

Does this part have a specified reverse recovery time (trr)?

No trr value is specified in the official Diodes Incorporated datasheet DS30266 Rev. 11-2. As a Schottky diode, it operates via majority-carrier conduction and exhibits negligible minority-carrier storage-making trr effectively unmeasurable and irrelevant for switching speed analysis. Figure 4 shows typical behavior but no guaranteed parameter.

Can SDMP0340LT-7-F be used in place of a standard silicon signal diode like 1N4148?

Only in low-voltage, low-current applications where its 40 V VRRM and 30 mA IFM are sufficient. Unlike the 1N4148 (100 V, 200 mA), it cannot handle higher reverse stress or surge currents. Its advantage lies in lower VF and capacitance-not ruggedness-so substitution requires verification of voltage, current, and thermal limits.

Is the SOT-523 package compatible with standard automated pick-and-place equipment?

Yes-the SOT-523 package is widely supported by industry-standard pick-and-place machines. Its 0.50 mm body height, 0.80 mm width, and defined tape-and-reel packaging (3000 units per reel, SDMP0340LT-7-F) meet IPC-7351B land pattern guidelines and are verified for reliable placement at ≥20 kHz throughput rates.