Diodes Incorporated SDM10P45-7-F

Overview

SDM10P45-7-F from Diodes Incorporated is a surface-mount Schottky barrier diode in SOT-523 package, rated for 45 V peak repetitive reverse voltage, 100 mA forward continuous current, and 370–470 mV forward voltage at 10–50 mA. It features ultra-low capacitance (6.0 pF at 10 V), fast switching, and PN junction guard ring for ESD/transient protection-used in portable USB power path and low-power sensor biasing circuits.

For engineers reviewing the SDM10P45-7-F datasheet, SDM10P45-7-F pinout, SDM10P45-7-F application, or SDM10P45-7-F equivalent, key selection criteria include its 45 V blocking capability, sub-500 mV VF at 50 mA, 6.0 pF junction capacitance, -40°C to +125°C operating range, and SOT-523 thermal resistance of 833°C/W.

Technical Context

This Schottky diode employs a planar silicon structure with integrated guard ring to suppress edge breakdown and improve transient robustness. Its low forward voltage enables efficient power routing in space-constrained battery-powered systems where voltage headroom is critical.

The device operates with minimal self-heating under 100 mA DC load due to its 120 mW power dissipation limit and optimized SOT-523 pad layout per AP02001. Reverse leakage remains below 1.0 µA at 10 V, supporting stable biasing in high-impedance analog front-ends.

Key Specifications

Pinout & Package

SOT-523 is a 3-terminal ultra-small plastic package (1.60 × 0.80 × 0.90 mm) with gull-wing leads, UL 94V-0 rated, moisture sensitivity level 1, and solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with RB520S-30T2R and NSR020HT1G, SDM10P45-7-F uniquely balances 45 V blocking, ultra-small SOT-523 size, and sub-500 mV VF at low currents-making it optimal for space-limited, multi-rail portable designs requiring robust transient immunity.

Availability

SDM10P45-7-F is available at Aetrix Electronics and suitable for USB power management, wearable sensor biasing, and RF ESD protection requiring stable component supply across high-mix, low-volume production runs.

Supply support for SDM10P45-7-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, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The SDM series targets ultra-compact, low-loss Schottky rectification in portable electronics, emphasizing thermal efficiency, ESD resilience, and minimal board footprint for next-generation wearables and IoT endpoints.

FAQ

Is SDM10P45-7-F suitable for reverse polarity protection in 5 V USB applications?

Yes. With 45 V VRRM and 370–470 mV VF at 10–50 mA, it provides robust reverse blocking while maintaining ≥4.75 V output under 100 mA load-meeting USB 2.0 voltage tolerance. Its guard ring structure also withstands ±8 kV HBM ESD events common in USB port environments.

What is the maximum ambient temperature for continuous 100 mA operation?

At 100 mA DC, junction temperature rise is limited by RJA = 833°C/W. On standard FR-4 with recommended pad layout (AP02001), ambient must not exceed +85°C to keep Tj ≤ +125°C. Derating curves show 100 mA is sustainable up to +85°C ambient, dropping to 60 mA at +105°C.

Does SDM10P45-7-F have a cathode indicator marking?

Yes. The device is marked "LG" on the top surface per datasheet page 2, with the cathode indicated by a band adjacent to Pin 2. Polarity diagram in DS30287 Rev. 4-2 confirms Pin 2 as cathode and Pin 1 as anode in SOT-523 orientation.

Can SDM10P45-7-F replace BAT54S in existing SOT-23 designs?

No. SDM10P45-7-F uses SOT-523 (1.6 × 0.8 mm), while BAT54S uses SOT-23 (3.0 × 1.4 mm). Footprint and pinout are incompatible. Electrical differences-including 45 V vs. 30 V VRRM and 6.0 pF vs. ~10 pF CT-also require layout and signal integrity revalidation.