Renesas HZ4C2J-E

Overview

HZ4C2J-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 6.0 V (min 6.0 V, max 6.3 V), dynamic resistance of 60 Ω at 0.5 mA, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C. It is used in stabilized power supplies, reference voltage sources, and noise-sensitive instrumentation.

For engineers reviewing the HZ4C2J-E datasheet, HZ4C2J-E pinout, HZ4C2J-E application, or HZ4C2J-E equivalent, key selection criteria include its low-noise performance (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance, DO-35 package compatibility, and suitability for low-current (<1 mA) precision biasing and voltage clamping.

Technical Context

The HZ4C2J-E belongs to the HZ-L Series, engineered specifically for reduced diode noise-critical in audio preamplifiers, sensor signal conditioning, and high-resolution ADC reference circuits. Its low leakage current and low zener impedance support stable regulation under light-load conditions.

Designed with a silicon planar junction structure and navy-blue cathode band marking, it operates within a wide ambient temperature range (−55°C to +175°C storage), and exhibits a zener voltage temperature coefficient of approximately −0.02 %/°C near 6 V, minimizing drift in thermally varying environments.

Key Specifications

Pinout & Package

Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body color and navy-blue cathode band. Mass: 0.13 g. Dimensions: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C6V2 and MMSZ4685, the HZ4C2J-E delivers superior low-noise regulation at microamp bias currents, tighter voltage control at low I_Z, and proven thermal resilience-making it the preferred choice for analog signal integrity-critical designs where DO-35 packaging is acceptable.

Availability

HZ4C2J-E is available at Aetrix Electronics and suitable for stabilized power supplies, precision voltage references, and low-noise analog biasing requiring stable component supply, long-lifecycle continuity, and traceable sourcing for industrial instrumentation and medical-grade signal chains.

Supply support for HZ4C2J-E 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

Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and infrastructure markets.

The HZ-L Series was developed by Renesas to address demand for ultra-low-noise Zener diodes in high-fidelity audio, precision metrology, and sensor interface applications-emphasizing voltage stability, thermal predictability, and noise reduction over generic regulation.

FAQ

What is the exact zener voltage range for HZ4C2J-E?

The HZ4C2J-E has a specified zener voltage range of 6.0 V minimum to 6.3 V maximum, measured at a test current of 0.5 mA under DC conditions. This tight 0.3 V window ensures consistent clamping behavior across production lots and supports accurate voltage reference design without post-manufacturing trimming. The HZ4C2J-E achieves this specification using Renesas' silicon planar Zener process optimized for low-noise performance.

Is HZ4C2J-E suitable for low-current biasing applications?

Yes, the HZ4C2J-E is explicitly characterized down to 0.5 mA test current and exhibits low dynamic resistance (60 Ω max) and minimal leakage (1 μA max at 2.0 V) at microamp-level reverse bias. Its low-noise profile and stable regulation make it ideal for biasing high-impedance nodes in op-amp circuits, sensor bridges, and standby-mode references-where the HZ4C2J-E delivers superior stability versus standard Zeners.

What is the package type and marking for HZ4C2J-E?

The HZ4C2J-E uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A), with an orange-colored body and a navy-blue cathode band. Pin 1 is the cathode, marked by the band; Pin 2 is the anode. The Renesas part number "HZ4C2J-E" is not laser-marked on the device but identified via tape-and-reel labeling and packaging documentation per standard distribution practice.

How does HZ4C2J-E compare to standard HZ-series Zeners in noise performance?

The HZ4C2J-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to proprietary junction processing and optimized doping profiles in the HZ-L Series. This reduction is verified under identical test conditions and directly improves signal-to-noise ratio in sensitive analog paths-making the HZ4C2J-E a validated solution where the original HZ series introduced unacceptable noise floor elevation.

Can HZ4C2J-E be used in automotive under-hood environments?

Yes, the HZ4C2J-E supports junction temperatures up to 175°C and storage temperatures from −55°C to +175°C, meeting requirements for non-safety-critical under-hood applications such as engine control sensor biasing and cabin climate module references. While not AEC-Q200 qualified, its thermal robustness and low-drift characteristics make the HZ4C2J-E suitable for extended industrial temperature deployments where the HZ4C2J-E's noise advantage remains critical.