Nexperia USA Inc. HPZR-C12X

Overview

HPZR-C12X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision low-current regulation at nominal 12 V with ±5 % tolerance, 4.1 W DC power dissipation at T_sp = 75 °C, and 30 kV ESD rating per IEC 61000-4-2 (contact discharge), used in industrial power rail stabilization and overvoltage protection circuits.

For engineers reviewing the HPZR-C12X datasheet, HPZR-C12X pinout, HPZR-C12X application, or HPZR-C12X equivalent, this page delivers verified specifications including 12 V working voltage (min 11.1 V / max 12.3 V at I_Z = 1 mA), 10 Ω differential resistance, 2.5 µA reverse current, thermal resistance R_th(j-sp) = 18 K/W, and SOD123W footprint compatibility - all critical for thermal-aware Zener biasing and surge-clamp design.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 12 V (±5 %) at I_Z = 1 mA, delivering stable reference voltage under low-current conditions. Its 10 Ω dynamic impedance ensures minimal output voltage shift across load variations, while the 30 kV ESD rating enables robust handling in unshielded PCB environments.

The device uses a planar silicon junction structure optimized for high-reliability DC regulation, with thermal performance validated for zero-lead-length mounting on FR4 PCBs. Junction temperature is rated to 150 °C, and total power dissipation de-rates linearly above 25 °C ambient, reaching 4.1 W only at solder point temperature ≤ 75 °C.

Key Specifications

Pinout & Package

HPZR-C12X is housed in a CFP3 package (JEDEC SOD123W), measuring 2.6 mm × 1.7 mm × 1.0 mm, with flat leads and low-profile construction optimized for automated reflow assembly and thermal conduction via cathode pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C12 and MMSZ5242B, HPZR-C12X delivers 8× higher power handling and 2× lower thermal resistance to solder point - enabling reliable 12 V regulation in thermally demanding industrial and automotive edge nodes without heatsinking.

Availability

HPZR-C12X is available at Aetrix Electronics and suitable for industrial sensor conditioning, telecom power sequencing, automotive body control modules, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for HPZR-C12X 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 essential efficiency technologies, delivering high-performance, high-reliability discrete and logic devices for automotive, industrial, and consumer markets.

The HPZR series belongs to Nexperia's high-power Zener regulator product line, engineered specifically for stable, low-leakage voltage reference and overvoltage protection in thermally constrained SMD applications where standard Zeners fail to meet power or ESD requirements.

FAQ

What is the maximum continuous reverse voltage (V_R) that HPZR-C12X can block before breakdown?

HPZR-C12X maintains ≤2.5 µA reverse current up to V_R = 9.0 V, as specified in Table 12. This defines its safe blocking range below the 11.1 V minimum Zener voltage - critical for avoiding premature conduction in bias networks or divider chains where margin below V_Z must be preserved.

How does the 4.1 W power rating relate to PCB layout requirements?

The 4.1 W rating applies only when measured at zero lead length with the cathode soldered directly to a 1 cm² copper pad on FR4 (T_sp = 75 °C). Achieving this requires strict adherence to the SOD123W reflow footprint in Figure 11 - including 1.1 mm pad width, 2.1 mm pad length, and 0.1 mm stencil thickness - otherwise derating to ≤962 mW at 25 °C ambient is required.

Can HPZR-C12X replace standard 1N4742A in existing designs?

No - HPZR-C12X is not a drop-in replacement for 1N4742A. It uses SOD123W (CFP3) packaging versus DO-41, has different thermal behavior (R_th(j-sp) = 18 K/W vs. R_th(j-a) ≈ 70 K/W), and requires zero-lead-length mounting to achieve 4.1 W. Layout redesign and thermal validation are mandatory before substitution.

Is HPZR-C12X qualified for automotive applications?

No - HPZR-C12X is not AEC-Q200 qualified. While it meets 12 V system-level requirements and offers 30 kV ESD robustness, Nexperia explicitly states in Section 14 that non-automotive qualified products are unsuitable for safety-critical or automotive use unless separately validated and warranted by the customer.