Nexperia USA Inc. HPZR-C28X

Overview

HPZR-C28X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) surface-mount package, designed for precision DC voltage regulation and transient suppression. It delivers 4.1 W total power dissipation at T_sp = 75 °C, features ±5 % voltage tolerance, operates at nominal 28 V working voltage (V_Z = 26.7–29.5 V @ I_Z = 1 mA), and sustains 30 kV ESD per IEC 61000-4-2 (contact discharge), making it suitable for industrial power rail stabilization.

For engineers reviewing the HPZR-C28X datasheet, HPZR-C28X pinout, HPZR-C28X application, or HPZR-C28X equivalent, this page provides verified pin configuration, thermal derating behavior, differential resistance (R_Z = 24 Ω @ I_Z = 20 mA), non-repetitive peak power (800 W), and real-world use cases in low-current regulation with high ESD immunity.

Technical Context

This device functions as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias voltage clamping under DC and short-pulse conditions. Its 28 V nominal breakdown voltage is specified at I_Z = 1 mA, with maximum reverse current I_R ≤ 0.1 μA at V_R = 22.7 V and differential resistance R_Z = 24 Ω - confirming tight regulation performance in low-noise analog supply rails.

Thermal design relies on junction-to-solder-point thermal resistance R_th(j-sp) = 18 K/W (measured at cathode tab), enabling efficient heat transfer to PCB copper when mounted on FR4 with 1 cm² cathode pad. Total power dissipation drops linearly from 4100 mW at T_sp = 75 °C to zero at T_j = 150 °C, per absolute maximum ratings.

Key Specifications

Pinout & Package

HPZR-C28X uses the CFP3 (SOD123W) plastic SMD package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead profile, cathode marked by bar on top surface. Thermal performance depends on soldering the cathode tab directly 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-C27 and 1N4752A, HPZR-C28X uniquely combines 28 V regulation, 4.1 W power handling, 24 Ω dynamic impedance, and 30 kV ESD in an ultra-compact SOD123W package - enabling higher-density, more robust, and lower-BOM designs in industrial and test equipment.

Availability

HPZR-C28X is available at Aetrix Electronics and suitable for industrial sensor power supplies, PLC input protection circuits, IoT edge node voltage references, and automated test equipment bias circuits requiring stable component supply with full traceability and lifecycle support.

Supply support for HPZR-C28X 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 for automotive, industrial, and consumer markets.

The HPZR series targets high-power Zener regulation in space-constrained SMT applications, emphasizing thermal efficiency, ESD resilience, and tight voltage tolerance for mission-critical industrial power management.

FAQ

What is the maximum continuous power dissipation for HPZR-C28X at 25 °C ambient?

At T_amb ≤ 25 °C on an FR4 PCB with single-sided 1 cm² cathode copper pad, HPZR-C28X supports up to 962 mW continuous DC power dissipation. This value is defined in Table 1 and confirmed in Limiting Values Table 5, and reflects derating from the 4100 mW rating at T_sp = 75 °C due to reduced thermal gradient.

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

The 30 kV rating is measured per IEC 61000-4-2 contact discharge directly at the cathode solder point, meaning HPZR-C28X can absorb full ESD energy before downstream ICs see voltage overshoot. It is validated with ten non-repetitive pulses and requires proper PCB layout - including direct cathode pad connection to chassis ground - to achieve stated performance.

Can HPZR-C28X be used in series or parallel configurations?

No - HPZR-C28X is not characterized or rated for series or parallel operation. Its Zener voltage tolerance (±5 %) and thermal coefficient mismatch would cause uneven current sharing and potential thermal runaway. For higher voltage or current requirements, select a single device with matching V_Z and P_tot ratings instead.

What is the significance of R_th(j-sp) = 18 K/W in thermal design?

R_th(j-sp) = 18 K/W quantifies thermal resistance from junction to cathode solder point under zero-lead-length measurement. It means each watt dissipated raises the junction temperature 18 °C above the solder point temperature - guiding minimum copper area (≥1 cm²) and board layer stack-up to maintain T_j ≤ 150 °C under worst-case ambient and power conditions.