Nexperia USA Inc. BZX384-B3V3F

Overview

BZX384-B3V3F from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 3.3 V nominal breakdown at 5 mA, with 300 mW total power dissipation and 40 W non-repetitive peak reverse power handling. It serves as a precision reference or overvoltage clamp in low-power analog signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZX384-B3V3F datasheet, BZX384-B3V3F pinout, BZX384-B3V3F application, or BZX384-B3V3F equivalent, key selection criteria include its 3.3 V Zener voltage tolerance, differential resistance of ≤95 Ω at 5 mA, reverse current ≤5 μA at 1 V, thermal resistance of 415 K/W (junction-to-ambient), and compatibility with standard reflow soldering footprints for SOD323.

Technical Context

This device operates as a two-terminal silicon Zener diode optimized for stable voltage regulation in low-current, space-constrained applications. Its breakdown mechanism is controlled avalanche at 3.3 V, with temperature coefficient of −3.5 mV/K and typical junction capacitance of 450 pF at 0 V.

The diode exhibits low forward voltage (≤0.9 V at 10 mA), supports surge currents up to 6.0 A for 100 μs pulses, and maintains specified performance across −65 °C to +150 °C ambient and storage temperature ranges.

Key Specifications

Pinout & Package

Two-terminal surface-mount diode in SOD323 (SC-76) plastic package: 2.3 mm × 1.35 mm body, 0.45 mm thickness, cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with BZX384-B3V3F, the A variant offers superior initial accuracy for calibration-critical functions, while the C variant trades tolerance for lower unit cost in non-sensitive voltage detection-both retain identical thermal, surge, and footprint characteristics.

Availability

BZX384-B3V3F is available at Aetrix Electronics and suitable for power supply monitoring, signal level clamping, reference voltage sourcing, and ESD protection nodes requiring stable component supply in high-volume industrial and consumer electronics manufacturing.

Supply support for BZX384-B3V3F 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 and logic devices, with leadership in advanced packaging and automotive-qualified components.

The BZX384 series belongs to Nexperia's precision Zener diode product line, engineered for low-power voltage reference and regulation in space-constrained, cost-sensitive applications across industrial, computing, and communications equipment.

FAQ

What is the maximum continuous reverse current this diode can handle at 3.3 V?

The BZX384-B3V3F is not rated for continuous reverse current at its Zener voltage. At V_Z = 3.3 V and I_Z = 5 mA, it dissipates 16.5 mW - well within its 300 mW limit. Continuous operation above 5 mA requires derating per thermal resistance (415 K/W); sustained current beyond ~15 mA risks exceeding 150 °C junction temperature on standard FR4 PCB.

Can this diode replace a 3.3 V TVS diode in ESD protection circuits?

No - while BZX384-B3V3F handles 40 W non-repetitive surges, its 450 pF capacitance and lack of defined clamping voltage (V_C) make it unsuitable as a primary ESD protector on high-speed lines. It may supplement low-capacitance TVS devices in DC-biased clamping networks but does not meet IEC 61000-4-2 clamping performance requirements alone.

Is the SOD323 package compatible with standard 0805 reflow profiles?

Yes - Nexperia specifies a reflow soldering footprint matching JEDEC MS-012 (SC-76) standards, with 0.6 mm pad width and 2.2 mm center-to-center spacing. The SOD323 outline aligns with common 0805 land patterns, though thermal relief and solder paste volume must follow Nexperia's recommended stencil design (0.15 mm thickness, 80 % area ratio) to avoid tombstoning.

Does this part meet automotive qualification standards?

No - the BZX384-B3V3F is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 4, January 2023). It lacks AEC-Q200 stress testing and is not warranted for automotive applications. For automotive use, Nexperia offers separate -Q qualified variants (e.g., BZX384-B3V3-Q), which undergo extended temperature cycling and humidity testing.