Nexperia USA Inc. HPZR-C39X

Overview

HPZR-C39X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision DC voltage clamping and regulation at 39 V nominal working voltage with ±5 % tolerance. It delivers 4.1 W total power dissipation at T_sp = 75 °C, supports 800 W non-repetitive peak reverse power, and features 30 kV ESD rating per IEC 61000-4-2 (contact discharge), enabling robust operation in industrial power supply rails and overvoltage protection circuits.

For engineers reviewing the HPZR-C39X datasheet, HPZR-C39X pinout, HPZR-C39X application, or HPZR-C39X equivalent, this device serves as a high-stability, low-profile SMD Zener for fixed-voltage reference, transient suppression, and biasing in space-constrained 24–48 V systems where thermal performance and ESD resilience are critical selection criteria.

Technical Context

This Zener diode operates in reverse breakdown mode with a specified nominal Zener voltage of 39 V at I_Z = 20 mA, differential resistance R_Z = 33 Ω, and maximum reverse current I_R ≤ 0.1 µA at V_R = 31.2 V. Its thermal design relies on low junction-to-solder-point thermal resistance (R_th(j-sp) = 18 K/W) to sustain 4.1 W DC dissipation when mounted with zero lead length on PCBs.

The device complies with IEC 60134 absolute maximum ratings, including 150 °C junction temperature limit and 50 A non-repetitive peak forward current (t_p = 8.3 ms). Its CFP3 footprint enables high-density placement while maintaining mechanical stability under thermal cycling, and the cathode-marked body ensures unambiguous orientation during automated assembly.

Key Specifications

Pinout & Package

HPZR-C39X uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body size, flat lead profile, and cathode-bar marking for polarity identification. Thermal performance is optimized via direct cathode tab soldering to PCB copper area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C39 and 1N4739A, HPZR-C39X uniquely combines 4.1 W power handling, 30 kV ESD immunity, and SOD123W footprint-enabling single-device solutions for both regulation and transient suppression in modern industrial SMT assemblies.

Availability

HPZR-C39X is available at Aetrix Electronics and suitable for industrial power supplies, automated test equipment, DC motor drive protection, and telecom line card surge suppression requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for HPZR-C39X 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 automotive-qualified and industrial-grade components.

The HPZR series targets high-power Zener regulation in compact SMD packages, specifically engineered for thermal efficiency and ESD resilience in harsh-environment power conversion and protection circuits.

FAQ

What is the maximum continuous power dissipation for HPZR-C39X at 25 °C ambient?

At T_amb ≤ 25 °C on an FR4 PCB with single-sided 1 cm² cathode pad, HPZR-C39X supports 962 mW total power dissipation. This value drops linearly with rising ambient or solder point temperature, reaching 4100 mW only at T_sp = 75 °C under zero-lead-length measurement conditions.

How does the 30 kV ESD rating apply to circuit layout?

The 30 kV rating applies to contact discharge at the cathode solder point per IEC 61000-4-2. To maintain this performance, ensure the cathode pad connects directly to a solid copper pour with ≥1 cm² area and avoid narrow traces or vias between the diode and ground plane.

Can HPZR-C39X replace a 1N4739A in existing designs?

Yes, with layout adaptation: HPZR-C39X uses SOD123W footprint versus DO-41, requiring pad redesign. Electrically, it offers higher power (4.1 W vs. 1 W), lower R_Z (33 Ω vs. 25 Ω), and superior ESD rating (30 kV vs. unspecified), but shares identical 39 V ±5 % V_Z and tolerance.

What is the reverse leakage current specification at rated voltage?

At V_R = 31.2 V (80 % of nominal 39 V), HPZR-C39X guarantees reverse current ≤ 0.1 µA. At full 39 V, leakage remains minimal due to tight Zener knee characteristics, supporting low-power standby modes in battery-backed systems.