Nexperia USA Inc. HPZR-C4V3-QX

Overview

HPZR-C4V3-QX from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision low-current regulation at nominal 4.3 V with ±5 % tolerance, 8.5 µA max reverse current at 100 mA test current, and 7.0 Ω differential resistance; it delivers 5.5 W total power dissipation at T_sp = 75 °C and supports automotive-grade ESD robustness up to 30 kV (IEC 61000-4-2 contact discharge).

For engineers reviewing the HPZR-C4V3-QX datasheet, HPZR-C4V3-QX pinout, HPZR-C4V3-QX application, or HPZR-C4V3-QX equivalent, this device serves as a stable, AEC-Q101-qualified voltage reference in space-constrained automotive subsystems requiring high thermal resilience, low-profile SMD mounting, and repeatable breakdown behavior under transient load conditions.

Technical Context

This Zener diode operates in reverse-biased breakdown mode with a nominal working voltage of 4.3 V (min 4.00 V, max 4.60 V at I_Z = 100 mA), exhibiting tight 5 % tolerance and low dynamic impedance (7.0 Ω typical). Its thermal design targets junction-to-solder-point resistance of 18 K/W, enabling efficient heat transfer through the cathode tab in high-power-density layouts.

The device sustains non-repetitive peak reverse power up to 800 W for pulses ≤100 µs and handles forward current up to 400 mA, while maintaining compliance with AEC-Q101 stress testing for automotive discrete semiconductors including temperature cycling, HTRB, and ESD qualification.

Key Specifications

Pinout & Package

HPZR-C4V3-QX uses a 2-terminal CFP3 (SOD123W) surface-mount plastic package with cathode marked by a bar on the body. Thermal performance relies on direct soldering of the cathode tab to a 1 cm² copper pad on FR4 PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V3,115 and MMSZ4685T1G, HPZR-C4V3-QX offers 18× higher power capability, 2.1× lower dynamic impedance, and full automotive qualification-making it the sole option for thermally demanding, safety-relevant Zener regulation in vehicle ECUs.

Availability

HPZR-C4V3-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, lighting driver feedback circuits, and power supply overvoltage protection requiring stable component supply under extended temperature and high-reliability constraints.

Supply support for HPZR-C4V3-QX 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-including logic, discretes, MOSFETs, and bipolar devices-with manufacturing rooted in process efficiency and automotive-grade quality systems.

The HPZR-Q series belongs to Nexperia's high-power Zener regulator product line, engineered specifically for automotive subsystems needing robust, low-profile voltage references capable of surviving harsh thermal and electrical environments without derating.

FAQ

What is the maximum continuous reverse current HPZR-C4V3-QX can handle at 4.3 V?

HPZR-C4V3-QX is rated for continuous reverse current up to 400 mA per absolute maximum ratings, but its practical Zener regulation current is defined at I_Z = 100 mA for specification compliance. At that condition, it maintains 4.3 V ±5 % with 7.0 Ω differential resistance and ≤8.5 µA leakage at 1.0 V reverse bias.

Does HPZR-C4V3-QX require a heatsink for 5.5 W operation?

No heatsink is required: the 5.5 W rating applies at T_sp = 75 °C with zero lead length and a 1 cm² cathode copper pad on FR4 PCB. Its 18 K/W junction-to-solder-point thermal resistance enables full power dissipation via direct PCB copper conduction-standard layout suffices.

How does the CFP3 (SOD123W) package differ from standard SOD-123 in thermal performance?

CFP3 features wider cathode terminals and optimized internal die attach, achieving 18 K/W junction-to-solder-point resistance versus ~30–40 K/W for standard SOD-123. This 40–55 % improvement enables 5.5 W operation at 75 °C solder point temperature, whereas standard SOD-123 parts typically max out near 1 W.

Is HPZR-C4V3-QX compatible with lead-free reflow profiles?

Yes-Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The CFP3 package withstands peak temperatures up to 260 °C for 30 seconds, and recommended stencil thickness is 0.1 mm for controlled solder paste volume to ensure reliable cathode pad wetting without bridging.