Nexperia USA Inc. HPZR-C63X

Overview

HPZR-C63X from Nexperia is a high-power Zener voltage regulator diode in CFP3 (SOD123W) package, designed for precision DC voltage clamping and regulation at 63 V nominal working voltage (V_Z = 60.0–66.3 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 overvoltage protection circuits.

For engineers reviewing the HPZR-C63X datasheet, HPZR-C63X pinout, HPZR-C63X application, or HPZR-C63X equivalent, this page delivers verified thermal resistance (R_th(j-sp) = 18 K/W), differential impedance (R_Z = 54 Ω @ I_Z = 20 mA), reverse leakage (I_R ≤ 0.1 μA @ V_R = 50.4 V), forward voltage (V_F ≤ 1 V @ I_F = 100 mA), and non-repetitive surge capability (P_ZSM = 800 W, t_p ≤ 100 μs).

Technical Context

This device operates as a two-terminal, silicon planar Zener diode optimized for stable voltage reference and transient suppression in DC-biased circuits. Its 63 V nominal Zener voltage is specified at I_Z = 1 mA, with tight tolerance (±5 %) and low dynamic impedance (54 Ω) ensuring minimal output variation under load shifts.

Thermal design leverages direct cathode tab soldering to PCB copper: R_th(j-sp) = 18 K/W enables efficient heat transfer from junction to solder point, while R_th(j-a) = 70 K/W (on ceramic) and 130 K/W (on FR4, 1 cm² cathode pad) define ambient cooling limits. ESD robustness (30 kV contact) supports handling in unshielded assembly environments.

Key Specifications

Pinout & Package

HPZR-C63X 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 the 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 regulation applications.

Compared with BZX84-C62 and SMBJ64A, HPZR-C63X uniquely combines high DC power handling (4.1 W), low dynamic impedance (54 Ω), and ultra-low leakage (0.1 μA) - making it the only option capable of both precision regulation and sustained overvoltage clamping in industrial 48 V systems.

Availability

HPZR-C63X is available at Aetrix Electronics and suitable for industrial power supply protection, telecom line card clamping, automated test equipment reference, and renewable energy charge controller applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for HPZR-C63X 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 delivering high-performance, reliable discrete, logic, and MOSFET solutions with focus on efficiency, miniaturization, and robustness for industrial and automotive markets.

HPZR-C63X belongs to the HPZR series of high-power Zener regulators engineered specifically for stable DC voltage clamping in harsh-environment power systems where thermal resilience and ESD immunity are critical.

FAQ

What is the maximum continuous reverse current the HPZR-C63X can sustain at 63 V?

The HPZR-C63X is rated for continuous operation up to its total power dissipation limit of 4100 mW at T_sp = 75 °C. At 63 V, this corresponds to a maximum average reverse current of approximately 65 mA (I = P/V = 4100 mW / 63 V). Exceeding this requires active thermal management or derating per the derating curve in Figure 9.

How does the cathode tab thermal connection affect reliability in high-power operation?

The cathode tab is the primary thermal path: R_th(j-sp) = 18 K/W assumes direct soldering to ≥1 cm² copper. Without this, R_th(j-a) degrades to 130 K/W on FR4, raising junction temperature by ~110 °C at full power - risking thermal runaway. Proper pad layout per Figure 11 is mandatory for rated performance.

Can HPZR-C63X replace standard 1N4748A Zener diodes in existing designs?

Yes, but with key differences: HPZR-C63X offers 13.6× higher power (4.1 W vs. 300 mW), tighter tolerance (±5 % vs. ±5 %), and superior ESD rating (30 kV vs. unspecified). However, its CFP3 footprint differs from DO-41; PCB redesign and thermal validation are required before drop-in replacement.

What is the significance of the 0.1 μA reverse leakage specification at 50.4 V?

This value represents leakage at 80 % of nominal V_Z, confirming minimal conduction well below the knee voltage. In practice, it ensures negligible standby current in high-impedance voltage divider networks - critical for battery-powered monitoring circuits where microamp-level drain must be avoided.