Nexperia USA Inc. BZX38450-C6V2-QX

Overview

BZX38450-C6V2-Q from Nexperia is a low-current Zener voltage regulator diode in SOD323 (SC-76) package, designed for precision voltage reference and regulation at 6.2 V nominal with ±5 % tolerance. It delivers 160 Ω differential resistance at 5 mA, operates with 5.0 µA reverse current at 5 V, and supports automotive-grade reliability per AEC-Q101. It is used in battery-powered sensor biasing and low-power MCU reset circuitry.

For engineers reviewing the BZX38450-C6V2-Q datasheet, BZX38450-C6V2-Q pinout, BZX38450-C6V2-Q application, or BZX38450-C6V2-Q equivalent, key selection criteria include its 6.2 V Zener voltage with ±5 % tolerance, 160 Ω dynamic impedance at 5 mA, 300 mW power dissipation limit, and AEC-Q101 qualification for automotive ambient temperature range (−55 °C to +150 °C).

Technical Context

This Zener diode operates in reverse breakdown mode with a specified test current of 50 µA, enabling stable regulation in ultra-low-bias circuits. Its thermal resistance from junction to solder point is 110 K/W, supporting reliable operation on FR4 PCBs with standard footprint.

The device exhibits a positive temperature coefficient of +0.4 mV/K at 6.2 V and 5 mA, minimizing drift across temperature. Its 110 pF capacitance at 0 V and 1 MHz enables use in noise-sensitive analog references without compromising stability.

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 marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX38450-C6V2-Q, BZX384-B6V2 offers tighter voltage control but lacks AEC-Q101 validation, while MMSZ5234B-TP provides greater power headroom in a less space-constrained SOD-123 layout-making the C6V2-Q optimal for automotive-qualified, space-limited, low-bias designs.

Availability

BZX38450-C6V2-Q is available at Aetrix Electronics and suitable for automotive cabin electronics, industrial IoT sensor nodes, and wearable medical devices requiring stable component supply with guaranteed long-term continuity.

Supply support for BZX38450-C6V2-Q 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 logic, discrete, and MOSFET solutions, headquartered in Nijmegen, Netherlands.

The BZX38450-Q series belongs to Nexperia's automotive-qualified Zener diode product line, engineered specifically for low-current voltage reference and regulation in harsh-environment applications including engine control, ADAS sensors, and infotainment systems.

FAQ

What is the maximum reverse voltage this diode can withstand before breakdown?

The BZX38450-C6V2-Q has a nominal Zener voltage of 6.2 V with a tolerance range of 5.89 V to 6.51 V at 50 µA test current. Its absolute maximum non-repetitive peak reverse voltage is defined by the 40 W surge rating at 100 µs pulse width, corresponding to ~12.6 V at 3.17 A peak current. Continuous reverse operation must remain within the 6.2 V regulation band.

Can this Zener diode be used in series with another to achieve higher reference voltages?

Yes, BZX38450-C6V2-Q may be cascaded in series to generate higher reference voltages, but total power dissipation must remain within 300 mW per device and thermal coupling between devices must be minimized. Differential resistance adds linearly (e.g., two units yield ~320 Ω), increasing output impedance and reducing regulation accuracy under load variation.

How does the ±5 % tolerance affect accuracy in a precision ADC reference application?

At 6.2 V nominal, ±5 % tolerance means the actual Zener voltage falls between 5.89 V and 6.51 V. In a 16-bit ADC reference application, this introduces up to ±32 LSB error at full scale. For higher accuracy, system-level calibration or post-regulation buffering with an op-amp follower is recommended to mitigate unit-to-unit variation.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes, the SOD323 package is qualified for lead-free reflow soldering per JEDEC J-STD-020. Nexperia specifies a maximum peak temperature of 260 °C for 30 seconds, with ramp rates ≤ 3 °C/s. The recommended footprint (Fig. 10) uses 0.5 mm × 0.6 mm solder lands and 0.6 mm solder resist openings to ensure reliable wetting and minimize tombstoning risk.