Diodes Incorporated SD101CW-7

Overview

SD101CW-7 from Diodes Incorporated is a Schottky barrier switching diode in SOD-123 package, rated for 40 V peak repetitive reverse voltage, 15 mA forward continuous current, and 0.39 V forward voltage at 1.0 mA - optimized for low-power signal switching and high-speed rectification in portable electronics.

For engineers reviewing the SD101CW-7 datasheet, SD101CW-7 pinout, SD101CW-7 application, or SD101CW-7 equivalent, key selection criteria include its 1.0 ns reverse recovery time, 2.2 pF total capacitance at 0 V, negligible stored charge, cathode-banded polarity marking, and RoHS-compliant green molding compound.

Technical Context

This discrete Schottky diode uses guard ring construction to enhance transient immunity and suppress leakage under fast voltage transients. Its metal-semiconductor junction delivers near-zero reverse recovery charge and eliminates minority-carrier storage delay.

Designed for surface-mount operation on FR-4 PCBs with specified pad layout, it operates across –65 °C to +125 °C and dissipates up to 400 mW at 25 °C ambient, derating linearly above 25 °C per the published power derating curve.

Key Specifications

Pinout & Package

SOD-123 surface-mount plastic package with cathode band marking; 2-terminal device with anode and cathode leads formed for gull-wing soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAT54C-7-F and NSR0230HT1G, SD101CW-7 offers the highest reverse voltage rating (40 V) in this SOD-123 Schottky class and the lowest junction capacitance (2.2 pF), making it preferred for high-impedance, high-frequency sensing and clamping where voltage headroom and bandwidth are constrained.

Availability

SD101CW-7 is available at Aetrix Electronics and suitable for USB interface protection, RF detector front-ends, low-power level shifting, and battery voltage monitoring requiring stable component supply and consistent green material compliance.

Supply support for SD101CW-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, serving industrial, computing, consumer, and communications markets since 1960.

The SD101xW series targets space-constrained, low-power signal path applications where fast switching, low V_F, and robust transient performance are essential - especially in portable and battery-operated systems.

FAQ

Is SD101CW-7 suitable for reverse polarity protection in 3.3 V systems?

Yes - with a 40 V V_RWM and only 0.39 V forward drop at 1 mA, SD101CW-7 provides effective reverse-blocking while introducing minimal voltage loss in low-current 3.3 V supply paths. Its 15 mA I_F rating supports typical bias and monitoring loads, though higher-current applications require derating per the power dissipation curve.

What is the maximum operating temperature for continuous use?

The SD101CW-7 is rated for continuous operation from –65 °C to +125 °C junction temperature. At ambient temperatures above 25 °C, power dissipation must be reduced linearly per the 300 °C/W R_θJA rating and the published derating curve - e.g., max 200 mW at 75 °C ambient.

Does SD101CW-7 have a qualified lead-free finish?

Yes - it features matte tin plating annealed over Alloy 42 leadframe, compliant with J-STD-020D for solderability and RoHS Directive 2011/65/EU. The "Green" designation confirms absence of intentionally added lead, halogens, and antimony, verified per Diodes Incorporated's material declarations.

Can SD101CW-7 replace SD101BW-7 in existing designs?

Yes - both share identical SOD-123 package, pinout, and thermal characteristics, but SD101CW-7 has lower V_RWM (40 V vs. 50 V) and slightly lower V_F (0.39 V vs. 0.40 V @ 1 mA). Replacement is acceptable if system reverse voltage remains ≤40 V; verify transient margins and leakage at operating VR in the target application.