Renesas HZ36-3L-E

Overview

HZ36-3L-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 36.4–38.0 V at 0.5 mA test current, 300 Ω dynamic resistance, 400 mW power dissipation, and DO-35 glass package with navy-blue cathode band.

For engineers reviewing the HZ36-3L-E datasheet, HZ36-3L-E pinout, HZ36-3L-E application, or HZ36-3L-E equivalent, this device is selected for stable reference generation in low-drift power supplies, sensor biasing networks, and noise-sensitive instrumentation where zener impedance and temperature coefficient directly impact signal integrity.

Technical Context

The HZ36-3L-E operates as a two-terminal voltage reference using silicon planar junction technology optimized for reduced flicker noise-approximately 1/3 to 1/10 lower than standard HZ-series diodes. Its zener voltage is specified under DC test conditions at 0.5 mA, with maximum reverse current limited to 1 μA at VR = 27.0 V.

Thermal design relies on its DO-35 package's 175°C maximum junction temperature and −55°C to +175°C storage range. The zener voltage temperature coefficient is +0.08%/°C (≈+28.8 mV/°C) near 36 V, confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00.

Key Specifications

Pinout & Package

DO-35 glass axial package: cylindrical body (φD = 2.0 mm, L ≈ 26 mm), orange body color, navy-blue cathode band marking. Cathode is terminal 1; anode is terminal 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4749A and BZX85C36, the HZ36-3L-E delivers uniquely low noise and tighter voltage tolerance at 36–38 V, making it irreplaceable in metrology-grade references despite its lower power rating and DO-35 footprint.

Availability

HZ36-3L-E is available at Aetrix Electronics and suitable for high-precision voltage reference, low-noise sensor biasing, and industrial analog input module designs requiring stable component supply with traceable sourcing and long-term lifecycle support.

Supply support for HZ36-3L-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and advanced SoCs for industrial, automotive, and infrastructure markets.

The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in precision instrumentation, medical electronics, and test equipment where conventional Zener diodes introduce unacceptable signal degradation.

FAQ

What is the exact zener voltage range for HZ36-3L-E?

The HZ36-3L-E has a guaranteed zener voltage range of 36.4 V to 38.0 V when tested at I_Z = 0.5 mA and T_a = 25°C, per REJ03G0182-0300 Rev.3.00 page 3. This 1.6 V span reflects the device's tight binning for high-accuracy reference applications, and the value is measured under DC conditions-not pulsed or AC test methods.

Is HZ36-3L-E compatible with automated SMT assembly?

No, the HZ36-3L-E uses a DO-35 axial glass package with leads intended for through-hole mounting. It is not designed for surface-mount reflow or pick-and-place handling. For SMT-compatible alternatives, Renesas offers no direct drop-in replacement in the HZ-L series; discrete SMT Zeners like the TZM series would require redesign and validation.

What is the maximum reverse current specification for HZ36-3L-E?

The HZ36-3L-E specifies a maximum reverse current (I_R) of 1 μA at V_R = 27.0 V, as stated in the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. This low leakage supports high-impedance bias networks and prevents loading errors in precision reference circuits.

Does HZ36-3L-E have a specified temperature coefficient?

Yes-the HZ36-3L-E exhibits a positive zener voltage temperature coefficient of approximately +0.08%/°C (or +28.8 mV/°C) near 36 V, derived from Figure 2 ("Temperature Coefficient vs. Zener voltage") in REJ03G0182-0300 Rev.3.00. This value is typical and enables predictable drift compensation in calibrated systems.

Can HZ36-3L-E replace standard 1N47xx series Zeners in existing designs?

Only with circuit-level validation: HZ36-3L-E shares the same DO-35 package and pinout as 1N47xx devices, but its 36.4–38.0 V range, 300 Ω dynamic resistance, and low-noise construction differ significantly from the 1N4749A (27 V, 35 Ω). Direct substitution may cause overvoltage or degraded noise performance unless the application specifically targets 36 V low-noise regulation.