Nexperia USA Inc. BAS70-04,235

Overview

BAS70-04 from Nexperia is a general-purpose dual Schottky diode in SOT23 package, configured as two independent diodes sharing a common cathode/anode terminal (A1–K1 and A2–K2). It delivers 70 V reverse voltage rating, 70 mA forward current capability, and 410 mV typical forward voltage at 1 mA, enabling ultra-high-speed switching and low-loss clamping in compact power management and signal routing circuits.

For engineers reviewing the BAS70-04 datasheet, BAS70-04 pinout, BAS70-04 application, or BAS70-04 equivalent, key selection criteria include its dual-diode topology with shared terminal (pin 3 = K1/A2), low 2 pF capacitance at 0 V, 100 nA reverse leakage at 50 V, and thermal resistance of 500 K/W - critical for high-frequency, space-constrained designs requiring fast recovery and minimal parasitic loading.

Technical Context

The BAS70-04 integrates two independent Schottky junctions in a single SOT23-3 package with a shared-terminal configuration: Pin 1 = A1 (anode of diode 1), Pin 2 = K2 (cathode of diode 2), Pin 3 = K1/A2 (cathode of diode 1 and anode of diode 2). This arrangement supports series-clamp, dual-rail protection, or complementary signal steering without external interconnects.

Its Schottky construction enables sub-nanosecond reverse recovery (inherent to metal–semiconductor junctions), while the 150 °C maximum junction temperature and FR4-mount thermal resistance of 500 K/W define its usable power envelope in ambient-limited PCB layouts. The 2 pF capacitance at 0 V and 10 µA IR at 70 V reflect optimized trade-offs between speed, leakage, and breakdown robustness.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-terminal surface-mount plastic package, 2.9 mm × 1.3 mm × 1.0 mm body, 1.9 mm lead pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSR20F70HT1G and BAV99,215, the BAS70-04 uniquely combines shared-terminal topology, lowest VF (410 mV), and lowest Cd (2 pF), making it optimal for high-speed, low-loss dual-diode functions where layout density and signal fidelity are critical.

Availability

BAS70-04 is available at Aetrix Electronics and suitable for USB interface protection, logic-level translation, and power rail OR-ing requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for BAS70-04 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 essential semiconductors, with leadership in logic, discretes, and MOSFETs for automotive, industrial, and consumer markets.

The BAS70-04 belongs to Nexperia's general-purpose Schottky diode product line, engineered for compact, high-speed signal conditioning and protection in cost-sensitive, space-constrained applications.

FAQ

What is the pin configuration of the BAS70-04 and how does it differ from standard dual diodes?

Pin 1 is A1 (anode of diode 1), Pin 2 is K2 (cathode of diode 2), and Pin 3 is K1/A2 (shared cathode of diode 1 and anode of diode 2). This shared-terminal arrangement differs from isolated dual-diode packages (e.g., BAV99) and enables compact clamping or OR-ing without external node connection, reducing PCB area and parasitic inductance.

Can the BAS70-04 be used in 5 V or 12 V rail clamping applications?

Yes - its 70 V reverse voltage rating provides ample margin for 5 V and 12 V systems, and its 410 mV forward voltage at 1 mA ensures precise clamping thresholds. At 10 mA, VF rises to 750 mV, maintaining effective rail limiting up to ~70 mA peak current without thermal runaway under pulsed conditions.

How does the 2 pF capacitance affect high-frequency signal integrity?

The 2 pF diode capacitance at 0 V and 1 MHz minimizes loading on high-speed signals: for a 50 Ω system, it introduces <0.1 dB insertion loss up to 1.6 GHz and preserves rise times below 350 ps. This makes the BAS70-04 suitable for USB 2.0, HDMI DDC, and other sub-3 GHz digital interfaces where capacitive loading must remain under 2.5 pF.

Is the BAS70-04 qualified for automotive applications?

No - per Nexperia's revision history (v.11, Jan 2023), the BAS70-04 is explicitly designated as non-automotive qualified. It lacks AEC-Q101 stress testing and automotive-grade process controls. For automotive use, Nexperia offers the BAS70-04Q variant (Q-grade), which undergoes full qualification including temperature cycling, HTRB, and ESD testing per AEC standards.