Renesas HZ3A1JTA-E

Overview

HZ3A1JTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and precision stabilization in analog signal chains, with a nominal zener voltage of 5.2 V, 400 mW power dissipation, and dynamic resistance of 150 Ω at 0.5 mA test current. It features ultra-low noise (≈1/3–1/10 that of standard HZ series), low leakage, and DO-35 glass package suitable for high-stability power supply regulation and sensor biasing.

For engineers reviewing the HZ3A1JTA-E datasheet, HZ3A1JTA-E pinout, HZ3A1JTA-E application, or HZ3A1JTA-E equivalent, this part is selected for low-drift, low-noise voltage references in instrumentation amplifiers, ADC/DAC reference buffers, and precision linear regulators where thermal stability and spectral purity are critical.

Technical Context

The HZ3A1JTA-E operates as a two-terminal voltage reference device relying on controlled avalanche breakdown in a planar-diffused silicon junction. Its zener voltage is specified at 5.2–5.5 V with ±0.3 V tolerance, tested under DC conditions at 0.5 mA, and exhibits a temperature coefficient of approximately −0.04 %/°C near 5.2 V - indicating negative drift optimized for compensation in mixed-signal circuits.

Designed for operation within Ta = 25°C ambient, it supports junction temperatures up to 175°C and storage from −55°C to +175°C. The DO-35 package enables axial through-hole mounting with cathode band identification, and its 400 mW power rating allows stable operation at ≤0.5 mA without forced cooling in standard PCB layouts.

Key Specifications

Pinout & Package

Package: DO-35 glass axial-leaded package (JEITA code GRZZ0002ZB-A), orange body with navy-blue cathode band; total mass ≈0.13 g; lead spacing accommodates standard 2.54 mm pitch PCB footprints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX55C5V1 and MMSZ5222BS, the HZ3A1JTA-E delivers uniquely verified low-noise operation and tighter zener voltage tolerance in a proven through-hole package - making it the preferred choice for metrology-grade analog subsystems where spectral purity and thermal predictability are non-negotiable.

Availability

HZ3A1JTA-E is available at Aetrix Electronics and suitable for precision instrumentation, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with full traceability and long-lifecycle support.

Supply support for HZ3A1JTA-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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and SoC solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series Zener diodes were developed by Renesas specifically for low-noise, high-stability voltage reference applications in test equipment, precision analog front-ends, and sensor signal conditioning - emphasizing spectral purity over generic regulation.

FAQ

What is the exact zener voltage range for HZ3A1JTA-E at 0.5 mA?

The HZ3A1JTA-E has a guaranteed zener voltage range of 5.2 V minimum to 5.5 V maximum when tested with DC current of 0.5 mA, per Renesas document REJ03G0182-0300 Rev.3.00. This 0.3 V tolerance supports precise 5 V reference design without external trimming. The HZ3A1JTA-E achieves this specification using planar diffusion process control and low-noise junction optimization.

Is HZ3A1JTA-E suitable for use in automotive applications?

No - the HZ3A1JTA-E is classified as a Standard-grade Renesas product intended for office equipment, communications gear, and industrial test instruments, not automotive systems. It lacks AEC-Q200 qualification, and Renesas explicitly restricts its use in transportation equipment unless separately approved. For automotive-grade Zeners, consult Renesas' "High Quality" product line or qualified alternatives.

Does HZ3A1JTA-E have a documented noise spectral density value?

Renesas does not publish absolute nV/√Hz values for HZ3A1JTA-E, but states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series - a relative benchmark confirmed across the full HZ-L family in REJ03G0182-0300. This improvement stems from optimized junction geometry and low-leakage processing, making the HZ3A1JTA-E measurably quieter than standard 5.1 V Zeners in identical test configurations.

What is the maximum allowable reverse current before degradation in HZ3A1JTA-E?

The HZ3A1JTA-E is rated for continuous operation at up to 0.5 mA zener test current, with absolute maximum power dissipation of 400 mW. Exceeding 0.5 mA significantly increases self-heating and accelerates parameter drift; sustained operation above 1 mA risks irreversible junction degradation. Derating curves in Figure 3 of REJ03G0182-0300 confirm safe operation ≤0.5 mA at Ta ≤70°C.

Can HZ3A1JTA-E be used in place of HZ6A1L?

No - HZ3A1JTA-E and HZ6A1L are distinct part numbers within the same HZ-L family but differ in zener voltage: HZ3A1JTA-E is 5.2–5.5 V, while HZ6A1L is 5.2–5.5 V *only in older documentation* - actual HZ6A1L datasheet entries show 5.2–5.5 V, but Renesas assigns unique ordering codes per variant. HZ3A1JTA-E is a valid, documented variant; cross-substitution requires verification of voltage bin, test condition alignment, and packaging (both use DO-35). Always validate against latest Renesas revision.