Nexperia USA Inc. HPZR-C4V3X

Overview

HPZR-C4V3X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision DC voltage clamping and regulation at 4.3 V nominal working voltage with ±5 % tolerance, 7.0 Ω differential resistance at I_Z = 100 mA, and 4.1 W total power dissipation at T_sp = 75 °C. It delivers robust ESD protection up to 30 kV (IEC 61000-4-2 contact discharge) and supports low-current regulation in space-constrained industrial power rails.

For engineers reviewing the HPZR-C4V3X datasheet, HPZR-C4V3X pinout, HPZR-C4V3X application, or HPZR-C4V3X equivalent, key selection criteria include its 4.3 V nominal Zener voltage, 8.5 µA max reverse current at V_R, 1 V forward voltage at 100 mA, thermal resistance of 18 K/W (junction-to-solder point), and compatibility with standard SOD123W reflow footprints.

Technical Context

This device operates as a two-terminal, silicon planar Zener diode optimized for stable voltage reference and overvoltage protection in low-current (<400 mA DC) applications. Its design centers on tight V_Z tolerance (±5 %), low dynamic impedance (7.0 Ω), and high non-repetitive peak power capability (800 W for ≤100 µs pulses).

Thermal performance is defined by junction-to-solder-point resistance of 18 K/W and junction-to-ambient resistance down to 70 K/W on ceramic PCB - enabling reliable operation up to 150 °C junction temperature while maintaining specified V_Z stability under transient load conditions.

Key Specifications

Pinout & Package

HPZR-C4V3X uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat leads, low-profile design optimized for automated assembly and thermal transfer via cathode pad. The marking bar identifies the cathode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C4V3 and PZU12B2, HPZR-C4V3X uniquely combines 4.3 V Zener voltage, 4.1 W power rating, and 7.0 Ω dynamic impedance in CFP3 - making it the sole option for high-stability, high-power 4.3 V regulation where thermal margin and voltage accuracy are co-critical.

Availability

HPZR-C4V3X is available at Aetrix Electronics and suitable for industrial sensor modules, USB-C accessory power management, programmable logic controller I/O stages, and automotive body control reference circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for HPZR-C4V3X 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, discrete, and MOSFET devices, with manufacturing rooted in process innovation and automotive-grade reliability.

The HPZR series belongs to Nexperia's high-power Zener diode product line, engineered specifically for industrial and computing applications demanding stable voltage regulation under high thermal stress and ESD exposure.

FAQ

What is the maximum continuous current HPZR-C4V3X can regulate at 4.3 V?

HPZR-C4V3X supports up to 400 mA DC forward current (I_F) per absolute maximum ratings. At its nominal 4.3 V Zener voltage, this corresponds to 1.72 W continuous power dissipation - well within its 4.1 W rated limit at T_sp = 75 °C, provided thermal design meets the 18 K/W junction-to-solder-point resistance specification.

Does HPZR-C4V3X require external heat sinking for 4.1 W operation?

No external heat sink is required. When mounted on an FR4 PCB with a 1 cm² tin-plated copper pad on the cathode side, HPZR-C4V3X achieves 4100 mW DC dissipation at T_sp = 75 °C. Its 18 K/W junction-to-solder-point thermal resistance enables full-rated power handling using only standard PCB copper area - verified per datasheet Table 5 and Figure 9.

How does the 30 kV ESD rating translate to system-level protection?

The 30 kV rating (IEC 61000-4-2 contact discharge) is measured directly at the cathode solder point, meaning HPZR-C4V3X clamps ESD energy before it reaches sensitive downstream ICs. This eliminates the need for additional TVS diodes in many I/O protection schemes - confirmed by compliance with IEC 61000-4-2 Level 4 (>15 kV air, >8 kV contact) and MIL-STD-883 Class 3 (>8 kV HBM).

Can HPZR-C4V3X replace older 1N4733A Zeners in existing designs?

HPZR-C4V3X is not a direct drop-in replacement for 1N4733A due to differing package (CFP3 vs DO-41), thermal path (solder-pad–based vs lead-based), and tighter 4.3 V tolerance (±5 % vs ±5 % nominal but wider distribution). While both regulate near 4.3 V, layout redesign is required to accommodate the SOD123W footprint and leverage its superior thermal performance.