Nexperia USA Inc. HPZR-C75X

Overview

HPZR-C75X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision DC voltage clamping and regulation at 75 V nominal working voltage (V_Z = 71.1–78.6 V @ I_Z = 1 mA), with 4.1 W total power dissipation at T_sp = 75 °C and 30 kV ESD rating per IEC 61000-4-2 (contact discharge), used in industrial power supply rail protection and overvoltage suppression circuits.

For engineers reviewing the HPZR-C75X datasheet, HPZR-C75X pinout, HPZR-C75X application, or HPZR-C75X equivalent, key selection criteria include its 75 V nominal Zener voltage tolerance (±5 %), low differential resistance (R_Z = 64 Ω @ I_Z = 20 mA), 1 μA max reverse current at V_R, and thermal resistance R_th(j-sp) = 18 K/W to solder point - critical for high-reliability transient suppression in constrained PCB layouts.

Technical Context

This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias voltage regulation under DC and transient conditions. Its design targets high surge immunity (P_ZSM = 800 W for t_p ≤ 100 µs) and robust thermal performance via low-profile CFP3 packaging with direct cathode tab thermal path.

It delivers precise 75 V regulation with tight V_Z spread (71.1–78.6 V), low dynamic impedance (64 Ω), and minimal temperature coefficient - enabling accurate reference and clamp functions without external biasing circuitry in space-constrained SMD applications.

Key Specifications

Pinout & Package

HPZR-C75X uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead profile, cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C75 and SMBJ75A, HPZR-C75X uniquely combines 75 V precision regulation, 4.1 W steady-state power handling, and 800 W transient capacity in a thermally optimized SMD package - making it the only option for applications demanding both accuracy and ruggedness in a single device.

Availability

HPZR-C75X is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line card overvoltage suppression, and medical diagnostic power sequencing requiring stable component supply with guaranteed long-term manufacturability.

Supply support for HPZR-C75X 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, headquartered in Nijmegen, Netherlands, with manufacturing in Asia and Europe.

The HPZR series belongs to Nexperia's high-power Zener regulator product line, engineered specifically for industrial-grade DC rail stabilization and transient suppression where thermal efficiency, ESD hardness, and tight voltage tolerance are mandatory.

FAQ

What is the maximum continuous power dissipation for HPZR-C75X at 75 °C solder point temperature?

The HPZR-C75X delivers 4100 mW (4.1 W) total power dissipation at T_sp = 75 °C with zero lead length measurement condition, verified per IEC 60134 limiting values. This rating assumes direct thermal coupling to a 1 cm² cathode pad on FR4 PCB and defines the upper boundary for reliable DC operation without thermal runaway.

How does the 30 kV ESD rating apply to real-world handling and PCB layout?

The 30 kV rating is measured per IEC 61000-4-2 contact discharge at the cathode soldering point, confirming robustness against human-body ESD during assembly and field service. Layout best practice requires keeping the cathode pad unbroken and directly connected to ground plane to maintain this rating - splitting or narrow traces degrades ESD performance.

Can HPZR-C75X replace standard 1N4744A in existing 75 V regulator designs?

No - the 1N4744A is DO-41 through-hole with P_tot = 1 W and R_Z ≈ 20 Ω, while HPZR-C75X is SMD CFP3 with 4.1 W rating and R_Z = 64 Ω. Direct replacement requires PCB redesign for SOD123W footprint and thermal pad, plus verification of reduced dynamic impedance impact on loop stability in feedback networks.

What is the significance of the 0.1 μA reverse current specification at V_R?

This value specifies maximum leakage current at rated reverse voltage (V_R = 60.8 V for HPZR-C75X), ensuring minimal loading on high-impedance reference nodes. In practice, it enables use in battery-backed circuits and precision sensor biasing where sub-nA leakage would cause measurable drift or premature discharge.