Nexperia USA Inc. HPZR-C20X

Overview

HPZR-C20X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision DC voltage stabilization in power supply rails and protection circuits. It delivers 20 V nominal Zener voltage at I_Z = 20 mA, with ±5 % tolerance, 0.1 µA max reverse current at V_R = 17 V, and 17 Ω differential resistance - enabling stable regulation under dynamic load conditions in industrial power converters.

For engineers reviewing the HPZR-C20X datasheet, HPZR-C20X pinout, HPZR-C20X application, or HPZR-C20X equivalent, key selection criteria include its 4.1 W DC power dissipation at T_sp = 75 °C, 800 W non-repetitive peak power capability (t_p ≤ 100 µs), 30 kV ESD rating per IEC 61000-4-2 (contact), and thermal resistance of 18 K/W from junction to solder point - critical for compact, thermally constrained PCB layouts.

Technical Context

This device operates as a two-terminal, silicon planar Zener diode with controlled avalanche breakdown. Its voltage regulation is defined at I_Z = 20 mA, with V_Z = 18.9–20.9 V and R_Z = 17 Ω typical, ensuring low output impedance and minimal voltage drift across operating temperature (−55 °C to +150 °C).

Thermal performance is optimized via low-profile CFP3 packaging: R_th(j-sp) = 18 K/W (cathode tab solder point), enabling direct heat transfer to PCB copper. The 30 kV ESD rating (IEC 61000-4-2 contact discharge) confirms robustness against handling and system-level transients without external clamping.

Key Specifications

Pinout & Package

HPZR-C20X uses the CFP3 (SOD123W) surface-mount plastic package: 2.6 mm × 1.7 mm × 1.0 mm body, flat lead profile, cathode marked by a bar on top surface. Thermal performance relies on cathode tab soldering to ≥1 cm² copper area on FR4 PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C20 and MMSZ5248B, HPZR-C20X delivers 13.7× higher DC power handling and verified 30 kV ESD robustness - making it uniquely suitable for industrial power rails requiring both precision regulation and field reliability without auxiliary protection.

Availability

HPZR-C20X is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive BCM reference design, LED driver current sense reference, and test equipment calibration requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for HPZR-C20X 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, reliable discrete and logic devices for automotive, industrial, and consumer markets.

The HPZR series targets high-power Zener regulation in thermally demanding SMD applications, emphasizing robustness, precision, and compact thermal design - bridging the gap between standard Zeners and discrete TVS solutions.

FAQ

What is the maximum continuous forward current for HPZR-C20X?

The HPZR-C20X is a Zener diode intended for reverse-bias operation; its absolute maximum forward current is 400 mA per limiting values table. However, forward conduction is not its functional mode - sustained forward bias above 1 V (VF ≈ 1 V at 100 mA) risks thermal runaway and should be avoided in regulation applications.

Can HPZR-C20X replace a 1N4744A in existing designs?

No - the 1N4744A is a through-hole DO-41 device rated for 1 W at 25 °C ambient, while HPZR-C20X is a surface-mount CFP3 device rated for 4.1 W at 75 °C solder point temperature. Direct substitution requires PCB layout revision, thermal pad redesign, and validation of surge response due to differing package parasitics and thermal paths.

How does the 30 kV ESD rating impact system-level design?

The 30 kV IEC 61000-4-2 contact discharge rating means HPZR-C20X can absorb full-system ESD events at the component level without damage or parameter shift. This eliminates the need for upstream TVS diodes in many industrial I/O and sensor interfaces, reducing BOM count and PCB area while maintaining IEC 61000-4-2 Level 4 compliance.

What is the recommended PCB footprint for optimal thermal performance?

For rated 4.1 W dissipation, Nexperia specifies a 1 cm² tin-plated copper pad connected to the cathode (Pin 1). The reflow footprint in Figure 11 shows 1.6 mm × 2.1 mm solder land with 0.1 mm stencil thickness; thermal vias beneath the pad are strongly recommended to enhance heat transfer to inner layers or ground plane.