Nexperia USA Inc. BZX38450-C2V4F

Overview

BZX38450-C2V4F from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision biasing and voltage reference in ultra-low-power circuits. It delivers a nominal 2.4 V regulation at 50 µA test current, with ±2 % tolerance, 200 Ω differential resistance at 5 mA, and 1.0 µA reverse current at VR = 2.0 V - enabling stable operation in portable battery-powered sensor nodes and microcontroller reset circuits.

For engineers reviewing the BZX38450-C2V4F datasheet, BZX38450-C2V4F pinout, BZX38450-C2V4F application, or BZX38450-C2V4F equivalent, key selection criteria include its low 50 µA test current, tight ±2 % tolerance, SOD323 footprint compatibility, and specified thermal resistance of 110 K/W to solder point - critical for space-constrained, thermally sensitive designs.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal 2.4 V working voltage (VZ), specified at IZ = 50 µA and Tj = 25 °C. Its differential resistance is 200 Ω at IZ = 5 mA, and temperature coefficient is −3.5 mV/K - indicating predictable, negative drift over temperature.

The device features intentional low leakage (1.0 µA max at VR = 2.0 V) and low forward voltage (VF ≤ 0.9 V at IF = 10 mA), supporting dual-role use as both voltage reference and ESD clamp in signal conditioning paths of IoT edge devices.

Key Specifications

Pinout & Package

Package: SOD323 (SC-76), surface-mounted plastic package; 2 leads; 1.3 mm pitch; 1.7 mm × 1.25 mm × 0.95 mm body. Cathode identified by marking bar.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX38450-C2V4F, BZX384-B2V4 trades precision for cost and MMSZ4678T1G trades miniaturization for thermal headroom - making the C2V4F optimal for space- and power-constrained 2.4 V reference designs requiring ±2 % stability.

Availability

BZX38450-C2V4F is available at Aetrix Electronics and suitable for microcontroller reset circuits, portable sensor biasing, IoT node power sequencing, and low-power signal clamping requiring stable component supply and guaranteed long-term sourcing.

Supply support for BZX38450-C2V4F 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 delivering high-performance, reliable components for automotive, industrial, and consumer electronics markets, with leadership in logic, discrete, and MOSFET technologies.

BZX38450-C2V4F belongs to Nexperia's low-current Zener regulator series, engineered specifically for ultra-low-power voltage reference and biasing in battery-operated and space-constrained applications.

FAQ

What is the maximum continuous reverse power dissipation for BZX38450-C2V4F?

The maximum continuous total power dissipation is 300 mW at ambient temperature ≤ 25 °C on a standard FR4 PCB with single-sided copper. Derating is required above 25 °C at 2.4 mW/K based on R_th(j-a) = 415 K/W, and junction temperature must not exceed 150 °C under any operating condition.

How does the ±2 % tolerance affect design margin in a 2.4 V reference application?

With ±2 % tolerance, the actual V_Z falls between 2.352 V and 2.448 V at 50 µA and 25 °C. This defines the absolute regulation window for downstream circuitry - for example, a supervisor IC with 2.42 V threshold will activate only if V_Z ≥ 2.42 V, requiring verification across temperature and current variation per Table 8 data.

Can BZX38450-C2V4F be used in forward conduction mode for ESD protection?

Yes - its forward voltage is ≤ 0.9 V at 10 mA, and it is rated for 250 mA forward current. In bidirectional clamping configurations, it provides low-impedance shunting for positive transients (via forward conduction) and negative transients (via Zener breakdown), with verified performance up to 40 W non-repetitive peak power per Figure 1.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes - Nexperia specifies a reflow footprint (Figure 10) with 0.5 mm solder land width and 0.6 mm solder resist opening. The device is qualified for JEDEC J-STD-020D moisture sensitivity level 1 and withstands peak reflow temperatures up to 260 °C for ≤ 30 seconds, matching standard lead-free profiles.