Diodes Incorporated BAV70W-7

Overview

BAV70W-7 from Diodes Incorporated is a dual surface-mount switching diode in SOT323 package, rated for 75 V peak repetitive reverse voltage, 300 mA forward current, and featuring 4 ns reverse recovery time and 2.0 pF capacitance at 0 V. It serves as a high-speed signal routing or clamping element in low-power analog and digital interface circuits.

For engineers reviewing the BAV70W-7 datasheet, BAV70W-7 pinout, BAV70W-7 application, or BAV70W-7 equivalent, key selection criteria include reverse recovery speed, junction capacitance, thermal resistance (625 °C/W), and RoHS-compliant green packaging - all critical for EMI-sensitive, space-constrained, and automotive-qualified designs.

Technical Context

The BAV70W-7 integrates two independent silicon switching diodes in a single SOT323 package with common cathode configuration (per internal schematic). Its fast 4 ns trr and low 2.0 pF CT enable clean signal edge preservation in 10–100 MHz clock routing and data line clamping.

Thermal performance is defined by 200 mW power dissipation on FR-4 (1" × 1", 2 oz Cu) and 625 °C/W junction-to-ambient resistance. The device operates across –55 °C to +150 °C, supporting industrial and under-hood automotive environments when used within derated limits.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small plastic surface-mount package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, lead-free matte tin plating over Alloy 42 leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BAV99W-7-F and MMBD7000-7-F, the BAV70W-7 offers optimal balance of low capacitance, industry-standard common-cathode pinout, and broad temperature capability - making it preferred for USB, sensor, and LIN applications where layout reuse and signal integrity are primary concerns.

Availability

BAV70W-7 is available at Aetrix Electronics and suitable for USB interface protection, industrial sensor conditioning, and automotive LIN bus designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.

Supply support for BAV70W-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, manufacturing, and sales operations across Asia, Europe, and North America.

The BAV70W-7 belongs to Diodes' general-purpose switching diode product line, engineered for high-speed, low-capacitance signal routing in space-constrained industrial, computing, and automotive subsystems.

FAQ

What is the polarity configuration of the BAV70W-7?

The BAV70W-7 features a dual-diode structure with two anodes (Pins 1 and 3) and a shared cathode (Pin 2), confirmed by the internal schematic in DS30063 Rev. 13–2. This common-cathode arrangement simplifies grounding in clamping and OR-ing applications and matches standard layout practices for USB and I²C protection networks.

Is the BAV70W-7 qualified for automotive use?

The BAV70W-7 itself is not AEC-Q101 qualified; however, its automotive-grade variant BAV70WQ-7-F is fully qualified, PPAP-capable, and manufactured in IATF 16949-certified facilities. The base BAV70W-7 shares identical electrical specs and package, but lacks formal automotive change control documentation and qualification testing.

How does the 625 °C/W thermal resistance impact PCB layout?

With θJA = 625 °C/W, the BAV70W-7 dissipates 200 mW at TA = 25 °C per the datasheet test condition (1" × 1", 2 oz Cu pad). To maintain TJ ≤ 125 °C at 150 mW power, ambient must stay ≤ 75 °C - achievable using minimum 10 mm² copper pour around Pin 2 (cathode) without thermal vias in most low-power applications.

Can the BAV70W-7 replace a single discrete diode in a design?

Yes - either anode (Pin 1 or Pin 3) can be used independently with the common cathode (Pin 2), effectively functioning as a single switching diode. Unused anode should be left unconnected or tied to a non-active potential; no degradation in trr, VF, or IR occurs when only one diode is active.