Renesas HZ30-2LTA-E

Overview

HZ30-2LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 29.2–30.6 V, 400 mW power dissipation, and dynamic resistance of 27 Ω at 0.5 mA test current. It is used in stabilized power supplies, reference voltage generators, and noise-sensitive instrumentation where low zener impedance and reduced diode noise are critical.

For engineers reviewing the HZ30-2LTA-E datasheet, HZ30-2LTA-E pinout, HZ30-2LTA-E application, or HZ30-2LTA-E equivalent, key selection criteria include its DO-35 package, 27 Ω zener impedance at 0.5 mA, −0.08 %/°C temperature coefficient near 30 V, 200 μA maximum reverse leakage at 23.3 V, and suitability for low-noise analog reference designs requiring stable DC biasing.

Technical Context

The HZ30-2LTA-E operates as a two-terminal voltage reference device using silicon planar junction technology with controlled doping to minimize shot and thermal noise. Its zener breakdown mechanism dominates in the 30 V range, delivering predictable regulation with low dynamic impedance and tight voltage tolerance (±0.7 V at 25°C).

Designed for DC-stabilized operation, it exhibits a negative temperature coefficient of −0.08 %/°C - typical for zeners above 5.6 V - and maintains stable performance up to 175°C junction temperature. The device is not intended for AC or transient suppression applications and requires external current limiting in series with the anode.

Key Specifications

Pinout & Package

Package: DO-35 glass axial-leaded package with orange body and navy-blue cathode band; dimensions per JEITA SC-40 standard (L ≈ 26 mm, φD ≈ 2.0 mm, 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 MMBZ5262BLT1G and BZX84-C30, the HZ30-2LTA-E offers superior noise performance, higher power margin for current-hungry references, and tighter voltage tolerance - making it optimal for high-fidelity analog signal conditioning where measurement repeatability is essential.

Availability

HZ30-2LTA-E is available at Aetrix Electronics and suitable for stabilized power supply design, precision analog reference generation, and low-noise instrumentation requiring stable component supply across extended production cycles.

Supply support for HZ30-2LTA-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 system-on-chip solutions for industrial, automotive, and consumer markets.

The HZ-L Series belongs to Renesas' discrete voltage reference product line, engineered specifically for low-noise, high-stability DC voltage regulation in precision analog subsystems where traditional Zener diodes exhibit excessive noise or drift.

FAQ

What is the exact zener voltage range specified for HZ30-2LTA-E at 0.5 mA test current?

The HZ30-2LTA-E has a guaranteed zener voltage range of 29.2 V to 30.6 V when tested at I_Z = 0.5 mA and T_a = 25°C, as documented in the Renesas REJ03G0182-0300 Rev.3.00 datasheet on page 3. This 1.4 V span reflects manufacturing tolerance and ensures consistent regulation behavior across production lots of the HZ30-2LTA-E.

Does HZ30-2LTA-E have a specified maximum reverse leakage current, and under what conditions is it measured?

Yes, the HZ30-2LTA-E specifies a maximum reverse leakage current (I_R) of 200 μA, measured at V_R = 23.3 V and T_a = 25°C. This value appears in the "Electrical Characteristics" table on page 3 of the official Renesas datasheet and confirms low off-state conduction critical for high-impedance reference node integrity in the HZ30-2LTA-E.

What is the dynamic resistance of HZ30-2LTA-E, and why is this parameter important in reference design?

The HZ30-2LTA-E has a maximum dynamic resistance (r_d) of 27 Ω at I_Z = 0.5 mA. This parameter quantifies how much the zener voltage changes per unit change in current - lower r_d means better regulation under varying load conditions. For the HZ30-2LTA-E, 27 Ω enables stable reference performance even with modest current fluctuations in precision analog circuits.

Is HZ30-2LTA-E suitable for automotive applications, and what quality grade does Renesas assign to it?

No, the HZ30-2LTA-E is classified by Renesas as a "Standard" quality grade device, intended for computers, office equipment, test instruments, audio/video gear, and industrial robots - not for automotive or safety-critical systems. Per Renesas documentation (page 1, Note 7), it lacks the qualification testing required for transportation or life-support applications, and must not be used in such contexts without explicit written consent.

What package type and marking identify HZ30-2LTA-E on the physical device?

The HZ30-2LTA-E uses the DO-35 glass axial-leaded package (JEITA code GRZZ0002ZB-A), with an orange body and a navy-blue cathode band. The "TA-E" suffix in the full part number corresponds to Renesas' internal tape-and-reel packaging variant for automated assembly, while the visible marking on the diode body is "HZ30-2L".