Renesas HZ36-2L-E

Overview

HZ36-2L-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 35.3–36.8 V, 400 mW power dissipation, 33.0 Ω dynamic impedance at 0.5 mA test current, and DO-35 glass package. It serves as a stable reference in low-drift power supplies and sensor biasing networks.

For engineers reviewing the HZ36-2L-E datasheet, HZ36-2L-E pinout, HZ36-2L-E application, or HZ36-2L-E equivalent, key selection criteria include zener voltage tolerance (±2.1% at 35.3–36.8 V), low noise performance (1/3–1/10 of standard HZ series), temperature coefficient (−0.04 %/°C typical), and DO-35 mechanical compatibility for through-hole PCB layouts.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents via controlled reverse-bias breakdown. Its low dynamic impedance (33.0 Ω) and tight zener voltage tolerance ensure minimal output variation under line and load transients.

The HZ36-2L-E exhibits a negative temperature coefficient (−0.04 %/°C) and junction temperature rating up to 175°C, enabling reliable operation in industrial ambient conditions. Its DO-35 glass package provides hermetic sealing and thermal stability critical for low-drift reference applications.

Key Specifications

Pinout & Package

Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body with navy blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX85C36 and 1N5255B, the HZ36-2L-E delivers tighter voltage tolerance (±2.1% vs. ±5%), lower dynamic impedance (33.0 Ω vs. ≥60 Ω), and significantly reduced noise - making it the preferred choice for precision analog reference and low-drift sensor biasing where signal integrity is critical.

Availability

HZ36-2L-E is available at Aetrix Electronics and suitable for high-reliability industrial instrumentation, precision sensor interfaces, and low-noise analog power supplies requiring stable component supply and long-term obsolescence management.

Supply support for HZ36-2L-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 timing solutions for automotive, industrial, and infrastructure markets.

The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced noise, tight voltage tolerance, and thermal stability over general-purpose regulation.

FAQ

What is the exact zener voltage range specified for HZ36-2L-E?

The HZ36-2L-E has a guaranteed zener voltage range of 35.3 V to 36.8 V when tested at I_Z = 0.5 mA and T_a = 25°C, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This ±2.1% tolerance enables accurate voltage setting in precision reference circuits without post-manufacturing trimming. The HZ36-2L-E achieves this specification using silicon planar processing with controlled doping profiles.

Does HZ36-2L-E support operation at elevated ambient temperatures?

Yes, the HZ36-2L-E is rated for junction temperatures up to 175°C and storage temperatures from −55°C to +175°C. Its DO-35 glass package and low thermal resistance allow reliable operation in industrial control cabinets or automotive engine compartments. Derating curves in the HZ36-2L-E datasheet show usable power dissipation down to 200 mW at 70°C ambient, confirming suitability for thermally demanding environments.

How does the noise performance of HZ36-2L-E compare to standard Zener diodes?

The HZ36-2L-E exhibits approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to optimized planar junction design and low-defect silicon processing. This reduction directly lowers RMS noise in reference paths - critical for high-resolution ADCs and low-level sensor amplifiers. The HZ36-2L-E datasheet quantifies this advantage explicitly in its Features section, distinguishing it from generic low-noise claims.

What is the maximum reverse leakage current for HZ36-2L-E at rated voltage?

The HZ36-2L-E specifies a maximum reverse leakage current (I_R) of 1 μA when tested at V_R = 27.0 V and T_a = 25°C. This ultra-low leakage supports energy-efficient designs such as battery-powered instrumentation and always-on monitoring circuits. The value is measured under DC conditions and confirmed in the Electrical Characteristics table on page 2 of the official HZ36-2L-E datasheet.

Is HZ36-2L-E compatible with standard DO-35 footprint layouts?

Yes, the HZ36-2L-E uses the JEITA-standard DO-35 package (Renesas code GRZZ0002ZB-A) with 2.0 mm body diameter and 26.0 mm overall length, matching industry-standard DO-35 land patterns. Its axial leads and orange body with navy blue cathode band follow IPC-7351 guidelines, ensuring drop-in compatibility with existing through-hole assembly processes and automated optical inspection systems.