Renesas HZ6A1-90-E

Overview

HZ6A1-90-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 5.2–5.5 V at 0.5 mA, 400 mW power dissipation, 150 Ω dynamic impedance, and DO-35 glass package with navy-blue cathode band. It serves in low-drift power supply feedback paths and sensor biasing where noise suppression is critical.

For engineers reviewing the HZ6A1-90-E datasheet, HZ6A1-90-E pinout, HZ6A1-90-E application, or HZ6A1-90-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance relative to legacy HZ series, thermal coefficient behavior below 7 V, DO-35 mechanical compatibility, and suitability for DC-stabilized references requiring <1 μA leakage.

Technical Context

The HZ6A1-90-E operates as a two-terminal shunt regulator with DC-tested zener characteristics, specified at I_Z = 0.5 mA and T_a = 25°C. Its low-noise design achieves ~1/3–1/10 the noise level of standard HZ-series diodes, enabled by optimized silicon planar junction processing and low-leakage construction.

It exhibits a negative temperature coefficient below 5.6 V (typical γ_Z ≈ −0.08 %/°C per Fig.2), supports stable operation up to T_j = 175°C, and maintains rated P_d = 400 mW only within ambient limits defined by its DO-35 thermal derating curve (Fig.3).

Key Specifications

Pinout & Package

DO-35 glass axial package with 2-terminal configuration: cylindrical body (φD = 2.0 mm, L = 26.0 mm), navy-blue cathode band marking, orange body color, and mass ≈ 0.13 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4733A and BZX55C5V1, the HZ6A1-90-E delivers tighter V_Z tolerance (±0.3 V vs. ±5%), lower noise, and guaranteed low-leakage performance in the same DO-35 footprint-making it preferable for metrology-grade references despite lower power rating.

Availability

HZ6A1-90-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise sensor biasing, and industrial power supply feedback applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for HZ6A1-90-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 mixed-signal devices, and power management ICs, with strong heritage in industrial and automotive-grade components.

The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in test equipment, precision instrumentation, and sensor signal conditioning-emphasizing noise reduction, tight V_Z distribution, and thermal predictability over raw power handling.

FAQ

What is the exact zener voltage range for HZ6A1-90-E?

The HZ6A1-90-E has a guaranteed zener voltage range of 5.2 V to 5.5 V when tested at I_Z = 0.5 mA and T_a = 25°C, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This 0.3 V span reflects tight process control for the HZ6A1L variant and is measured under DC conditions-not AC or pulsed test methods.

Is HZ6A1-90-E compatible with standard DO-35 footprints?

Yes, the HZ6A1-90-E uses the JEITA-standard DO-35 package (Renesas code GRZZ0002ZB-A), with dimensions φD = 2.0 mm, L = 26.0 mm, and E = 4.2 mm. Its navy-blue cathode band and orange body match DO-35 mechanical and marking conventions, ensuring direct placement compatibility with existing DO-35 land patterns and pick-and-place tooling.

How does the noise performance of HZ6A1-90-E compare to generic Zener diodes?

The HZ6A1-90-E achieves approximately 1/3–1/10 the noise level of standard HZ-series Zeners due to proprietary silicon planar junction processing. This is confirmed in the datasheet's Features section and enables use in ultra-low-noise applications like 24-bit sensor front-ends where generic 5.1 V Zeners would contribute measurable broadband noise.

What is the maximum reverse leakage current for HZ6A1-90-E?

The HZ6A1-90-E specifies a maximum reverse leakage current (I_R) of 1 μA at V_R = 2.0 V and T_a = 25°C. This low leakage is critical for high-impedance reference dividers and battery-operated systems, and is significantly lower than alternatives like BZX55C5V1 (5 μA max) or 1N4733A (10 μA max).

Can HZ6A1-90-E be used in surface-mount designs?

No, the HZ6A1-90-E is exclusively offered in the through-hole DO-35 axial glass package and has no SMD variant. For surface-mount equivalents, Renesas offers other families (e.g., HZL series in SOD-123), but the HZ6A1-90-E itself requires axial mounting with leads bent to 2.54 mm or 5.08 mm pitch per standard DO-35 layout guidelines.