Renesas HZ6A1L-J-E

Overview

HZ6A1L-J-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 5.2–5.5 V, 400 mW power dissipation, and dynamic resistance of 150 Ω at 0.5 mA test current - deployed in reference voltage generation for instrumentation amplifiers and sensor signal conditioning.

For engineers reviewing the HZ6A1L-J-E datasheet, HZ6A1L-J-E pinout, HZ6A1L-J-E application, or HZ6A1L-J-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 of standard HZ series), temperature coefficient behavior, and DO-35 package compatibility with through-hole PCB layouts.

Technical Context

This device operates as a two-terminal shunt regulator with DC-tested zener characteristics, designed for stable biasing in low-current (<1 mA) analog subsystems where thermal drift and broadband noise must be minimized. Its junction temperature rating of 175°C supports operation in thermally constrained enclosures.

The HZ6A1L-J-E exhibits a negative temperature coefficient below ~5.6 V, confirmed by characteristic curves in the datasheet, and maintains low leakage (<1 μA at VR = 2.0 V), enabling high-impedance node stabilization without significant error current injection.

Key Specifications

Pinout & Package

DO-35 glass axial package with 2 mm diameter body and 26 mm overall length; cathode identified by navy-blue band; mass ≈ 0.13 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4728A and BZX55C5V1, the HZ6A1L-J-E delivers superior noise performance and tighter low-current regulation in the 5.2–5.5 V range, making it optimal for precision analog signal chains where spectral purity and thermal stability outweigh raw power handling.

Availability

HZ6A1L-J-E is available at Aetrix Electronics and suitable for instrumentation reference, sensor signal conditioning, low-power analog front-end, and industrial current loop interface applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for HZ6A1L-J-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 SoC solutions for automotive, industrial, and enterprise systems.

The HZ-L Series was developed specifically for low-noise voltage reference applications in high-fidelity analog circuits, emphasizing reduced broadband noise, tight zener voltage tolerance, and stable low-current regulation behavior.

FAQ

What is the zener voltage range specified for HZ6A1L-J-E?

The HZ6A1L-J-E has a zener voltage range of 5.2 V to 5.5 V, measured at a test current of 0.5 mA under DC conditions. This tight tolerance supports precision reference design in analog circuits where ±0.3 V variation is acceptable. The value is guaranteed per the REJ03G0182-0300 datasheet, and the HZ6A1L-J-E part number corresponds specifically to this voltage grade within the HZ-L family.

Does HZ6A1L-J-E have a documented low-noise characteristic?

Yes, the HZ6A1L-J-E is explicitly characterized as a low-noise Zener diode: its noise level is approximately 1/3 to 1/10 that of the standard HZ series, as stated in the official Renesas datasheet REJ03G0182-0300. This performance is achieved via silicon planar process optimization and is confirmed across the entire HZ-L family, including the HZ6A1L-J-E variant.

What package type and marking does HZ6A1L-J-E use?

HZ6A1L-J-E uses the DO-35 axial glass package (JEITA code GRZZ0002ZB-A), with an orange body and navy-blue cathode band. The "J-E" suffix denotes Renesas' internal packaging and testing configuration, consistent with the HZ-L Series ordering nomenclature defined in the datasheet. Pin 1 is cathode, Pin 2 is anode.

What is the maximum power dissipation and thermal limit for HZ6A1L-J-E?

The HZ6A1L-J-E has a maximum power dissipation of 400 mW at T_a = 25°C and a maximum junction temperature of 175°C. Derating begins above 25°C ambient, following the curve in Figure 3 of REJ03G0182-0300. This thermal rating allows reliable operation in enclosed industrial enclosures where board-level temperatures may reach 75–85°C.

Is HZ6A1L-J-E suitable for use in high-impedance reference nodes?

Yes, the HZ6A1L-J-E is well-suited for high-impedance reference nodes due to its low reverse leakage current (≤1 μA at V_R = 2.0 V) and stable regulation down to 0.5 mA zener current. These characteristics minimize loading error and drift in precision voltage references - a key design advantage of the HZ6A1L-J-E over general-purpose Zeners in instrumentation-grade circuits.