Taiwan Semiconductor Corporation RB751V-40 RRG

Overview

RB751V-40 RRG from Taiwan Semiconductor is a surface-mount Schottky barrier diode in SOD-323 package, rated for 40 V repetitive peak reverse voltage, 30 mA average forward current, and 0.37 V forward voltage at 1 mA - optimized for low-loss rectification in compact DC/DC converters and adapter power stages.

For engineers reviewing the RB751V-40 RRG datasheet, RB751V-40 RRG pinout, RB751V-40 RRG application, or RB751V-40 RRG equivalent, key selection criteria include its 0.37 V VF at 1 mA, 2 pF junction capacitance at 0 V, 500 °C/W junction-to-ambient thermal resistance, RoHS-compliant halogen-free green compound, and cathode-band polarity marking for reliable assembly.

Technical Context

This Schottky diode employs a single-die silicon structure with matte gold-plated terminals meeting J-STD-002 solderability and JESD 201 Class 1A whisker resistance. Its low stored charge and fast recovery support high-frequency switching in flyback and boost topologies.

The SOD-323 package delivers minimal footprint (1.25 × 2.5 mm) and thermal performance validated per J-STD-020 Level 1 moisture sensitivity, enabling reflow compatibility without baking. Polarity is unambiguously indicated by a visible cathode band on the molded case.

Key Specifications

Pinout & Package

Package: SOD-323 - ultra-compact plastic surface-mount case (1.25 × 2.5 mm), cathode marked by band, matte Au-plated leads, halogen-free green molding compound (suffix G), JEDEC-compliant footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSSR0230HT1G and BAT54C-7-F, the RB751V-40 RRG provides superior 40 V reverse standoff for universal-input adapters while maintaining competitive VF and industry-standard SOD-323 placement - making it optimal for space-constrained, single-diode 30–40 V rectification tasks.

Availability

RB751V-40 RRG is available at Aetrix Electronics and suitable for adapter power rectification, switching power supply output stages, and inverter auxiliary bias supplies requiring stable component supply with full traceability and green-material compliance.

Supply support for RB751V-40 RRG 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.

The RB751V-40 RRG belongs to TSC's general-purpose Schottky diode product line, engineered specifically for high-efficiency, low-profile rectification in space- and thermal-constrained power conversion circuits.

FAQ

What is the maximum reverse voltage rating for the RB751V-40 RRG?

The RB751V-40 RRG has a repetitive peak reverse voltage (VRRM) rating of 40 V, verified per its absolute maximum ratings table. This value defines the highest continuous reverse-bias voltage the device can block without breakdown under normal operating conditions. Exceeding 40 V may cause irreversible avalanche failure. The RB751V-40 RRG must be applied within this limit in all designs.

Does the RB751V-40 RRG meet RoHS and halogen-free requirements?

Yes, the RB751V-40 RRG complies with RoHS Directive 2011/65/EU and WEEE 2002/96/EC, and is halogen-free per IEC 61249-2-21. The "G" suffix in RB751V-40 RRG explicitly denotes green (halogen-free) compound. All materials, plating (matte Au), and packaging meet these environmental standards as confirmed in TSC's official documentation for RB751V-40 RRG.

What is the thermal resistance of the RB751V-40 RRG, and how does it affect PCB layout?

The RB751V-40 RRG has a junction-to-ambient thermal resistance (RθJA) of 500 °C/W under standard test conditions (terminals held at ambient). This high value means even modest power dissipation (e.g., 15 mW at 30 mA × 0.5 V) raises junction temperature significantly. To maintain TJ ≤ 125 °C, the RB751V-40 RRG requires adequate copper pour on both anode and cathode pads - especially critical in compact adapters.

Is the RB751V-40 RRG suitable for high-frequency switching applications?

Yes, the RB751V-40 RRG is well-suited for high-frequency switching due to its low junction capacitance (2 pF at 0 V) and low stored charge, enabling clean turn-off in converters operating above 1 MHz. Its fast recovery behavior is intrinsic to the Schottky structure - no minority-carrier delay - making the RB751V-40 RRG effective in snubber networks and synchronous rectifier assist paths.

How is polarity identified on the RB751V-40 RRG package?

Polarity on the RB751V-40 RRG is indicated by a distinct cathode band printed on the SOD-323 case body - consistent with JEDEC standard marking for surface-mount diodes. The banded end corresponds to the cathode terminal, which must connect toward the higher-potential node in forward conduction. This marking is visible under standard AOI inspection and aligns with the pinout defined in the RB751V-40 RRG mechanical drawings.