Renesas HZ6C3L90RE

Overview

HZ6C3L90RE from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 6.25 V (midpoint of 6.1–6.4 V range), 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 reference supplies for instrumentation amplifiers and sensor signal conditioning.

For engineers reviewing the HZ6C3L90RE datasheet, HZ6C3L90RE pinout, HZ6C3L90RE application, or HZ6C3L90RE equivalent, key selection criteria include its low-noise performance (1/3–1/10 that of standard HZ series), tight zener voltage tolerance, DO-35 package compatibility, and suitability for low-current (<1 mA) precision biasing and voltage reference roles.

Technical Context

This device operates as a two-terminal, DC-biased voltage reference with a zener breakdown mechanism. Its low dynamic resistance (60 Ω) and low leakage current ensure stable regulation under light-load conditions typical in op-amp feedback networks and ADC reference dividers.

The HZ6C3L90RE exhibits a zener voltage temperature coefficient near zero (±0.02 %/°C typical for ~6.2 V devices per Fig.2), enabling minimal drift over −55°C to +175°C ambient range. It is rated for 400 mW power dissipation at 25°C, derating linearly above 25°C per Fig.3.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C6V2 and 1N4735A, the HZ6C3L90RE delivers superior noise performance and tighter voltage tolerance in the same DO-35 footprint, making it optimal for precision analog reference applications where signal integrity dominates over raw power capacity.

Availability

HZ6C3L90RE is available at Aetrix Electronics and suitable for precision instrumentation, thermocouple measurement systems, high-resolution ADC reference design, and optical sensor bias networks requiring stable component supply and long-term parametric consistency.

Supply support for HZ6C3L90RE 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 manufacturer specializing in microcontrollers, analog mixed-signal devices, and power management ICs for industrial, automotive, and infrastructure markets.

The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in test equipment, medical sensors, and precision data acquisition systems where traditional Zener noise and tempco limitations impair performance.

FAQ

What is the exact zener voltage range for HZ6C3L90RE?

The HZ6C3L90RE has a guaranteed zener voltage range of 6.1 V to 6.4 V when tested at I_Z = 0.5 mA, per the Electrical Characteristics table on page 2 of REJ03G0182-0300 Rev.3.00. This 0.3 V window reflects tight process control for precision reference use, and the typical value is 6.25 V. The HZ6C3L90RE must be operated within this specified test condition to ensure compliance.

Is HZ6C3L90RE compatible with standard DO-35 footprints?

Yes, the HZ6C3L90RE uses the DO-35 package (JEITA code GRZZ0002ZB-A) with standardized dimensions: body diameter 2.0 mm, overall length 26.0 mm, and lead spacing 4.2 mm. It is mechanically and solder-process compatible with all industry-standard DO-35 land patterns, including those defined in IPC-7351 for through-hole assembly. The HZ6C3L90RE fits existing DO-35 sockets and reflow/reflow-compatible wave solder profiles.

How does the noise performance of HZ6C3L90RE compare to generic Zener diodes?

The HZ6C3L90RE achieves approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners, as stated in the Features section of the datasheet. This reduction stems from proprietary silicon planar processing and optimized junction geometry. In practice, this translates to significantly lower broadband voltage noise in reference nodes-critical for applications like 24-bit delta-sigma ADCs where HZ6C3L90RE's noise floor directly impacts effective resolution.

What is the maximum allowable reverse current before regulation degrades?

The HZ6C3L90RE is characterized at I_Z = 0.5 mA for zener voltage and dynamic resistance specifications. While it can operate up to 1 mA (per test condition column), sustained current beyond 0.5 mA increases self-heating and may elevate dynamic resistance above the 60 Ω max. For stable regulation, maintain I_Z between 0.2 mA and 0.8 mA; the HZ6C3L90RE delivers best tempco and noise performance near 0.5 mA.

Does HZ6C3L90RE have a specified temperature coefficient?

The datasheet does not list a discrete temperature coefficient value for HZ6C3L90RE, but Figure 2 shows that devices with zener voltages near 6.2 V exhibit a γ_Z of approximately ±0.02 %/°C. This near-zero tempco is confirmed by the curve crossing zero near 6 V, making the HZ6C3L90RE especially suitable for applications requiring minimal drift across −40°C to +85°C ambient ranges. The HZ6C3L90RE's tempco behavior is inherent to its 6.2 V zener voltage class.