Renesas HZ6A1JTA

Overview

HZ6A1JTA from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 5.2–5.5 V, 400 mW power dissipation, ≤150 Ω dynamic impedance at 0.5 mA, and noise level approximately 1/3–1/10 that of standard HZ-series diodes. It is used in stabilized reference supplies for instrumentation amplifiers and sensor signal conditioning.

For engineers reviewing the HZ6A1JTA datasheet, HZ6A1JTA pinout, HZ6A1JTA application, or HZ6A1JTA equivalent, this part serves as a low-noise, low-leakage, DO-35 packaged Zener diode with tight V_Z tolerance (±0.3 V), stable temperature coefficient, and suitability for high-accuracy DC biasing and voltage clamping in sensitive analog front-ends.

Technical Context

The HZ6A1JTA operates as a two-terminal shunt regulator with DC-tested zener characteristics and exhibits low dynamic resistance (≤150 Ω) at I_Z = 0.5 mA, enabling stable regulation under light-load conditions. Its noise performance is specifically engineered for low-noise applications, distinguishing it from general-purpose Zeners.

Designed for operation at T_a = 25°C with absolute maximum junction temperature of 175°C and storage range of −55 to +175°C, the device maintains low leakage current and consistent zener voltage across its specified ambient range, supported by a published temperature coefficient curve peaking near zero around 6 V.

Key Specifications

Pinout & Package

Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body and navy-blue cathode band. Mass: 0.13 g. Dimensions per SC-40 standard: φD = 2.0 mm, E = 4.2 mm, L = 26.0 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5221B and BZX55-C5V6, the HZ6A1JTA delivers tighter V_Z control, verified low-noise behavior, and lower leakage-making it uniquely suitable for high-fidelity analog reference design where spectral purity and DC accuracy are jointly required.

Availability

HZ6A1JTA is available at Aetrix Electronics and suitable for stabilized power supply design, precision sensor interface development, and low-noise analog circuit prototyping requiring stable component supply and traceable sourcing.

Supply support for HZ6A1JTA 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 and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series-including HZ6A1JTA-is designed specifically for low-noise voltage reference applications in high-precision analog signal chains, emphasizing reduced diode noise, tight zener voltage tolerance, and stable thermal behavior.

FAQ

What is the exact zener voltage range for HZ6A1JTA?

The HZ6A1JTA 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. This 0.3 V window reflects tight process control for precision reference use, and the value is confirmed in the Renesas datasheet REJ03G0182-0300 Rev.3.00 on Page 2. The HZ6A1JTA does not exhibit wider tolerance under varying current or temperature unless explicitly characterized in the published curves.

Is HZ6A1JTA compatible with DO-35 footprint layouts?

Yes, the HZ6A1JTA uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with axial leads, 2.0 mm diameter, and 26.0 mm body length. Its pinout-cathode (band end) and anode (opposite end)-matches industry-standard DO-35 mechanical and soldering requirements. No layout modification is needed when replacing other DO-35 Zeners, though electrical validation remains essential for each application.

Does HZ6A1JTA have a specified noise spectral density?

The HZ6A1JTA datasheet does not list numerical noise spectral density (e.g., nV/√Hz), but explicitly states its noise level is "approximately 1/3–1/10 lower than the HZ series" under identical test conditions. This comparative specification is validated in Renesas' characterization and applies across the full operating current range. For HZ6A1JTA, noise advantage is a core differentiator-not an incidental property.

What is the maximum reverse leakage current for HZ6A1JTA?

The HZ6A1JTA has a maximum reverse leakage current of 1 μA when tested at V_R = 2.0 V and T_a = 25°C, as specified in the Electrical Characteristics table on Page 2 of REJ03G0182-0300. This low leakage supports high-impedance reference nodes and minimizes error in precision bias networks where even nanoamp-level currents affect accuracy.

Can HZ6A1JTA be used in surface-mount designs?

No, the HZ6A1JTA is exclusively offered in the through-hole DO-35 glass package and has no SMD variant. It is not compatible with reflow soldering or pick-and-place assembly. For surface-mount alternatives, engineers must select functionally similar but physically distinct parts-such as the NZ9F5V1T5G (SOD-923) or MMBZ5221BS (SOT-23)-which differ in V_Z, noise, and package; none replicate the HZ6A1JTA's exact low-noise DO-35 specification.