Nexperia USA Inc. BAS70-04WF

Overview

BAS70-04WF from Nexperia is a general-purpose dual Schottky diode in SOT323 (SC-70) package, configured as two independent diodes sharing a common terminal (A1–K1 and A2–K2). It delivers 70 V reverse voltage rating, 70 mA forward current capability, 410 mV forward voltage at 1 mA, 2 pF capacitance at 0 V, and 100 nA reverse leakage at 50 V - enabling ultra-high-speed switching and low-loss clamping in compact DC-DC and signal routing circuits.

For engineers reviewing the BAS70-04WF datasheet, BAS70-04WF pinout, BAS70-04WF application, or BAS70-04WF equivalent, key selection criteria include its dual-diode topology with shared cathode/anode configuration, low VF for minimal conduction loss, sub-2 pF junction capacitance for RF-sensitive paths, and thermal resistance of 500 K/W on FR4 PCB - critical for space-constrained power management and ESD protection designs.

Technical Context

This dual Schottky diode integrates two independent junctions in a single SC-70 package with pin 1 = A1, pin 2 = K2, pin 3 = K1/A2 - forming a common-cathode (D1) and common-anode (D2) pair. Its architecture supports bidirectional clamping and OR-ing functions without external interconnects.

Designed for high-frequency operation, it exhibits 2 pF capacitance at 0 V reverse bias and maintains stable VF across −40 °C to 125 °C ambient, with typical forward voltage ranging from 410 mV (1 mA) to 1 V (15 mA), and reverse leakage staying below 10 µA up to 70 V at 25 °C.

Key Specifications

Pinout & Package

The BAS70-04WF is housed in a 3-pin SOT323 (SC-70) surface-mount plastic package measuring 2.0 mm × 1.25 mm × 0.95 mm, with 1.3 mm lead pitch and tin-plated terminations compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSR20F70HT1G and BAV99W-7-F, the BAS70-04WF uniquely balances ultra-low VF (410 mV), ultra-low IR (100 nA), and 2 pF capacitance - making it optimal for precision clamping and RF-adjacent signal conditioning where all three parameters constrain design margins.

Availability

BAS70-04WF is available at Aetrix Electronics and suitable for ultra-high-speed switching, voltage clamping, RF detector input stages, and low-power logic translation requiring stable component supply and consistent parametric performance across production lots.

Supply support for BAS70-04WF 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The BAS70 series targets general-purpose Schottky applications demanding low VF, low Cd, and robust thermal performance in miniature packages - specifically optimized for space-constrained power management and signal integrity-critical roles.

FAQ

What is the maximum junction temperature for BAS70-04WF?

The absolute maximum junction temperature is 150 °C, as defined in the Absolute Maximum Ratings table. Operation above this temperature risks permanent degradation of the Schottky barrier and increased reverse leakage. Derating is required above 25 °C ambient based on Rth(j-a) = 500 K/W and actual power dissipation.

Is BAS70-04WF automotive qualified?

No. Per Nexperia's revision history and legal disclaimers, BAS70-04WF is explicitly designated as non-automotive qualified. It has not undergone AEC-Q101 stress testing or qualification for automotive environments. For automotive use, Nexperia recommends its -Q qualified variants such as BAS70-04W-Q.

How does the shared pin (pin 3) function in circuit design?

Pin 3 serves as both cathode of diode 1 (K1) and anode of diode 2 (A2), enabling compact dual-path configurations: e.g., clamping one signal to VCC (via D1) and another to GND (via D2) using only three PCB traces. This eliminates need for external node tying and reduces parasitic inductance in high-speed layouts.

Can BAS70-04WF replace BAS70-04W in existing designs?

Yes - BAS70-04WF is a direct form-fit-function replacement for BAS70-04W, sharing identical electrical specifications, pinout, package dimensions, and thermal characteristics. The 'F' suffix denotes tape-and-reel packaging per JEDEC standard; no electrical or mechanical differences exist between the base and 'F' variants.