Nexperia USA Inc. BAV99S/DG/B4X

Overview

BAV99S/DG/B4X from Nexperia is a quadruple high-speed switching diode array in SOT363 (SC-88) package, configured as two independent series-connected diode pairs for dual-channel clamping or polarity protection. It delivers trr ≤ 4 ns reverse recovery time, Cd ≤ 1.5 pF capacitance at 1 MHz/0 V, and VR = 100 V peak reverse voltage per diode - enabling use in 50–200 MHz RF detector, ESD-critical I/O line, and automotive CAN bus termination circuits.

For engineers reviewing the BAV99S/DG/B4X datasheet, BAV99S/DG/B4X pinout, BAV99S/DG/B4X application, or BAV99S/DG/B4X equivalent, key selection criteria include verified 4 ns trr performance under IF=10 mA → IR=10 mA switching, AEC-Q101 qualification for automotive environments, dual-series diode topology supporting bidirectional signal clamping, and SOT363 thermal resistance Rth(j-sp) = 260 K/W for compact PCB layouts.

Technical Context

The BAV99S implements four discrete silicon planar epitaxial diodes arranged in two isolated series pairs (D1–D2 and D3–D4), with shared terminals enabling compact dual-channel protection without external routing. Its low 1.5 pF junction capacitance minimizes signal distortion in high-frequency analog paths up to 200 MHz.

Reverse recovery is characterized under standardized conditions (IF = 10 mA to IR = 10 mA, RL = 100 Ω, measurement at IR = 1 mA), ensuring consistent timing behavior across production lots. AEC-Q101 qualification confirms operation over −65 °C to +150 °C ambient, with Tj max = 150 °C and Ptot = 250 mW at Tsp ≤ 85 °C.

Key Specifications

Pinout & Package

SOT363 (SC-88) 6-pin plastic surface-mounted package with standard footprint (2.2 mm × 1.35 mm × 0.95 mm height), optimized for reflow soldering on FR4 PCBs with single-sided copper and tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed switching diode applications.

Compared with BAV99S/DG/B4X, BAV99W offers smaller footprint but sacrifices channel count and thermal performance, while ESDR0502N provides lower capacitance and tighter clamping but lacks switching capability and reverse voltage headroom.

Availability

BAV99S/DG/B4X is available at Aetrix Electronics and suitable for automotive CAN bus termination, USB 2.0 interface protection, and RF detector front-end conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BAV99S/DG/B4X 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 specializing in high-performance, energy-efficient logic, analog, and discrete devices, with manufacturing rooted in process technology leadership and automotive-grade quality systems.

The BAV99 series belongs to Nexperia's high-speed switching diode product line, engineered specifically for signal integrity preservation in automotive communication buses, industrial I/O protection, and RF front-end applications demanding sub-4 ns recovery and ultra-low capacitance.

FAQ

Is BAV99S/DG/B4X pin-compatible with other BAV99 variants like BAV99 or BAV99W?

No - BAV99S uses a 6-pin SOT363 package with dual-series diode topology (pins 1–2–3 and 4–5–6), whereas BAV99 (SOT23) and BAV99W (SOT323) are 3-pin dual-diode packages with different pin assignments and no shared terminal configuration. PCB layout and schematic symbol must be redesigned for substitution.

What is the maximum continuous forward current per diode in BAV99S/DG/B4X?

The maximum continuous forward current per diode is 200 mA at Tsp ≤ 85 °C, as specified in Table 6 "Limiting values" of the Nexperia datasheet Rev. 8. Derating is required above 85 °C solder point temperature, with total power dissipation limited to 250 mW under those conditions.

Does BAV99S/DG/B4X support bidirectional signal clamping?

Yes - its dual-series configuration (D1–D2 and D3–D4) allows each pair to clamp positive and negative excursions independently. When used with appropriate biasing, it provides symmetrical ±V clamp levels for AC-coupled signals such as CAN differential pairs or USB data lines.

How does AEC-Q101 qualification impact BAV99S/DG/B4X usage in non-automotive applications?

AEC-Q101 qualification ensures robustness against temperature cycling, mechanical shock, and high-reliability stress testing - making BAV99S/DG/B4X suitable for industrial, medical, and aerospace applications where extended lifetime and failure-rate predictability are critical, even outside automotive environments.