Renesas HZ15H2-E

Overview

HZ15H2-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 15.1 V (min 14.5 V, max 15.1 V), 400 mW power dissipation, 13.0 Ω dynamic resistance at 0.5 mA test current, ≤1 μA reverse leakage at 12.2 V, and DO-35 glass package with orange body and navy-blue cathode band.

For engineers reviewing the HZ15H2-E datasheet, HZ15H2-E pinout, HZ15H2-E application, or HZ15H2-E equivalent, key selection criteria include zener voltage tolerance (±0.6 V), low noise performance relative to standard HZ series, thermal coefficient behavior near 15 V, and compatibility with through-hole PCB layouts requiring GRZZ0002ZB-A footprint.

Technical Context

The HZ15H2-E operates as a two-terminal voltage reference device using silicon planar junction technology, with zener breakdown mechanism dominant in its 15.1 V range. Its low dynamic impedance (13.0 Ω) and sub-μA leakage support stable regulation under light-load conditions typical in sensor biasing and ADC reference circuits.

Designed for DC-stabilized operation per specification note, it exhibits a zener voltage temperature coefficient near −0.04 %/°C (≈−6 mV/°C) based on Figure 2 interpolation for 15 V-class devices in the HZ-L series, and derates linearly to ~270 mW at 75°C ambient per Figure 3.

Key Specifications

Pinout & Package

DO-35 glass axial package: cylindrical orange body with navy-blue cathode band; total mass 0.13 g; lead spacing 20 mm (standard), 10 mm (optional), or 5 mm (tight layout); JEITA code SC-40.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4744A and BZX79-C15, the HZ15H2-E delivers superior noise suppression and tighter voltage tolerance in the same DO-35 footprint, making it optimal for high-resolution measurement systems where reference integrity dominates design constraints.

Availability

HZ15H2-E is available at Aetrix Electronics and suitable for high-precision ADC reference, low-noise sensor biasing, and industrial PLC analog input protection requiring stable component supply and consistent parametric performance across production lots.

Supply support for HZ15H2-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 manufacturer specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in test equipment, medical instrumentation, and precision data acquisition systems where conventional Zener diodes introduce unacceptable signal corruption.

FAQ

What is the exact zener voltage range specified for HZ15H2-E?

The HZ15H2-E has a guaranteed zener voltage range of 14.5 V minimum to 15.1 V maximum when tested at I_Z = 0.5 mA and T_a = 25°C, as confirmed in the Electrical Characteristics table on page 3 of REJ03G0182-0300 Rev.3.00. This 0.6 V span reflects tight binning for precision reference use, distinct from broader-tolerance variants like HZ15-2L.

Does HZ15H2-E have documented low-noise performance compared to standard Zener diodes?

Yes - the HZ-L Series datasheet explicitly states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series. While absolute noise figures (nV/√Hz) are not tabulated for HZ15H2-E individually, this comparative claim applies to all HZ-L parts including HZ15H2-E and is validated by Renesas' low-noise process optimization described in the Features section on page 1.

What is the maximum allowable reverse voltage before breakdown for HZ15H2-E?

The HZ15H2-E begins controlled zener breakdown at its specified V_Z range (14.5–15.1 V). The absolute maximum non-destructive reverse voltage is not separately defined, but the device must be operated below its 400 mW power limit. At 12.2 V reverse bias, leakage is guaranteed ≤1 μA - confirming stable blocking behavior well below breakdown threshold.

Is HZ15H2-E compatible with automated through-hole assembly processes?

Yes - the HZ15H2-E uses the standard DO-35 axial package (GRZZ0002ZB-A) with 2.0 mm body diameter and 26 mm lead length, fully compatible with industry-standard wave soldering and selective soldering equipment. Lead spacing is configurable (5 mm, 10 mm, or 20 mm), supporting both dense and standard pitch PCB layouts.

How does the temperature coefficient of HZ15H2-E affect its performance in varying ambient conditions?

Based on Figure 2 in the datasheet, HZ-L series devices near 15 V exhibit a zener voltage temperature coefficient of approximately −0.04 %/°C (≈−6 mV/°C). This predictable negative drift allows straightforward hardware or firmware compensation in systems operating from −40°C to +85°C, where total V_Z shift remains within ±0.5 V across the full industrial range.