Renesas HZ5B2JTA-E

Overview

HZ5B2JTA-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 5.6 V ±0.3 V, dynamic resistance of 80 Ω at 0.5 mA, maximum power dissipation of 400 mW, and junction temperature rating of 175°C - deployed in reference voltage sources for data converters and sensor signal conditioning.

For engineers reviewing the HZ5B2JTA-E datasheet, HZ5B2JTA-E pinout, HZ5B2JTA-E application, or HZ5B2JTA-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low-noise performance relative to standard HZ series, DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.

Technical Context

This device operates as a two-terminal shunt regulator with DC-tested zener breakdown characteristics. Its low dynamic impedance (80 Ω) and reduced noise level (≈1/3–1/10 of HZ series) stem from optimized silicon planar junction design and controlled diffusion process.

The HZ5B2JTA-E exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C near 5.6 V, consistent with mid-voltage Zener devices, and maintains stable regulation under reverse-biased conditions up to 400 mW at 25°C ambient, derating linearly above 25°C per the published power vs. temperature curve.

Key Specifications

Pinout & Package

Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), body color orange, cathode band navy blue, mass 0.13 g, dimensions φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55-C5V6 and MMSZ5232B, the HZ5B2JTA-E delivers uniquely low noise and tighter voltage tolerance (±0.3 V), making it preferred for metrology-grade references - though its 80 Ω r_d is higher than alternatives, its stability under thermal stress and proven low-noise behavior justify use in high-fidelity analog signal chains.

Availability

HZ5B2JTA-E is available at Aetrix Electronics and suitable for high-precision ADC references, low-drift sensor signal conditioning, and programmable logic controller analog I/O requiring stable component supply with traceable sourcing and long-term lifecycle support.

Supply support for HZ5B2JTA-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 Technology Corp. is a Japanese semiconductor manufacturer specializing in microcontrollers, analog mixed-signal ICs, and power management solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision measurement and instrumentation systems where conventional Zeners introduce unacceptable signal corruption.

FAQ

What is the exact zener voltage range for HZ5B2JTA-E at 0.5 mA test current?

The HZ5B2JTA-E has a specified zener voltage range of 5.6 V minimum to 5.9 V maximum when tested at I_Z = 0.5 mA and T_a = 25°C. This 0.3 V span reflects tight process control within the HZ-L Series and enables direct use in 5.5 V–5.9 V reference designs without external trimming. The value is confirmed in the Electrical Characteristics table on page 2 of REJ03G0182-0300 Rev.3.00, and applies exclusively to the HZ5B2JTA-E variant.

Is HZ5B2JTA-E suitable for surface-mount assembly?

No, the HZ5B2JTA-E uses a DO-35 glass axial package with 26.0 mm lead length and 2.0 mm body diameter, intended for through-hole mounting only. It is not compatible with reflow or wave soldering processes used for SMT. For surface-mount equivalents, consider MMSZ5232B or BZX84-C5V6 - but note these lack the documented low-noise performance of the HZ5B2JTA-E.

What is the maximum allowable reverse current before regulation degrades in HZ5B2JTA-E?

The HZ5B2JTA-E specifies a maximum reverse current (I_R) of 1 μA at V_R = 2.0 V, measured at 25°C. Exceeding this voltage risks entering unregulated conduction or accelerating junction degradation. Regulation remains stable up to its rated 400 mW dissipation limit when operated within the defined I_Z range (0.5–1 mA recommended), as verified in the Absolute Maximum Ratings table on page 2 of the official Renesas datasheet.

Does HZ5B2JTA-E have a documented noise spectral density specification?

The HZ5B2JTA-E datasheet does not provide numerical noise spectral density (nV/√Hz) values, but explicitly states its noise level is "approximately 1/3–1/10 lower than the HZ series" - a comparative metric validated across the full HZ-L Series. This reduction is achieved via optimized planar junction fabrication and is confirmed in the Features section on page 1 of REJ03G0182-0300 Rev.3.00. No frequency-dependent noise curves are published for HZ5B2JTA-E individually.

What is the zener voltage temperature coefficient (γ_Z) for HZ5B2JTA-E?

The zener voltage temperature coefficient for HZ5B2JTA-E is approximately −0.04 %/°C, inferred from Figure 2 ("Temperature Coefficient vs. Zener Voltage") on page 4 of REJ03G0182-0300 Rev.3.00, which plots γ_Z for 5.6 V devices in the HZ-L Series. This negative coefficient is typical for Zeners in the 5–6 V range and enables predictable drift compensation in precision analog circuits using matched components.