Renesas HZ7B2LTA-E

Overview

HZ7B2LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 6.9 V to 7.2 V at 0.5 mA test current, dynamic resistance of 60 Ω max, and 400 mW power dissipation in DO-35 package. It serves as a stable voltage clamp or reference in low-drift power supply feedback paths and sensor biasing networks.

For engineers reviewing the HZ7B2LTA-E datasheet, HZ7B2LTA-E pinout, HZ7B2LTA-E application, or HZ7B2LTA-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 that of standard HZ series), temperature coefficient (−0.04 %/°C typical at ~7 V), and DO-35 thermal derating behavior up to 175°C junction temperature.

Technical Context

This device operates as a two-terminal, reverse-biased voltage reference with controlled breakdown characteristics. Its silicon planar construction ensures reproducible zener voltage and low leakage (<1 μA at VR = 2.0 V), while the low dynamic impedance (60 Ω max) supports stable regulation under varying load currents.

The HZ7B2LTA-E exhibits a negative temperature coefficient near 7 V (−0.04 %/°C), making it suitable for temperature-compensated references when paired with positive-TC components. It is rated for operation from −55°C to +175°C storage and junction temperature, with absolute maximum power dissipation of 400 mW at 25°C ambient.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BLT1G and BZX84-C7V5, the HZ7B2LTA-E offers tighter voltage tolerance, superior noise performance, and higher power handling in a through-hole DO-35 package-making it preferred for recalibration-free upgrades in industrial and test equipment where legacy footprints and precision matter.

Availability

HZ7B2LTA-E is available at Aetrix Electronics and suitable for industrial power supplies, precision sensor interfaces, and test & measurement equipment requiring stable component supply with guaranteed long-term continuity and RoHS-compliant sourcing.

Supply support for HZ7B2LTA-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 global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series was designed specifically for low-noise, high-stability voltage reference applications in analog signal chains-addressing demand for improved SNR in sensor conditioning and precision power control.

FAQ

What is the exact zener voltage range for HZ7B2LTA-E at 0.5 mA test current?

The HZ7B2LTA-E has a specified zener voltage range of 6.9 V minimum to 7.2 V maximum when tested at I_Z = 0.5 mA, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This 0.3 V window supports consistent performance across production lots without binning, and the HZ7B2LTA-E maintains this specification under standard 25°C ambient conditions.

Does HZ7B2LTA-E have a documented temperature coefficient, and how does it affect long-term stability?

Yes, the HZ7B2LTA-E exhibits a typical temperature coefficient of −0.04 %/°C near its 7.05 V nominal point, as shown in Figure 2 of the official datasheet. This negative TC enables predictable drift behavior-allowing compensation via series positive-TC components-and contributes to <±0.5% total variation over −40°C to +85°C in well-designed circuits using the HZ7B2LTA-E.

Can HZ7B2LTA-E replace older HZ-series Zener diodes without circuit modification?

Yes, the HZ7B2LTA-E is a direct functional upgrade to HZ6B2L and related variants in the legacy HZ family, sharing identical DO-35 package, pinout, and voltage range-but with significantly reduced noise (1/3–1/10) and tighter dynamic resistance. No PCB changes are required, and the HZ7B2LTA-E delivers measurable SNR improvement in existing designs originally using HZ6B2L or similar.

What is the maximum allowable power dissipation for HZ7B2LTA-E at 70°C ambient temperature?

Per the derating curve in Figure 3 of the HZ-L Series datasheet, the HZ7B2LTA-E's maximum power dissipation drops linearly from 400 mW at 25°C to approximately 280 mW at 70°C ambient. This requires appropriate PCB copper area and airflow planning-especially in enclosed industrial enclosures-since exceeding this limit risks junction temperature exceeding 175°C and premature failure of the HZ7B2LTA-E.

Is HZ7B2LTA-E compliant with RoHS and lead-free soldering requirements?

Yes, the HZ7B2LTA-E meets EU RoHS Directive requirements and is compatible with lead-free reflow soldering profiles. Renesas confirms environmental compliance in product documentation and provides material declarations upon request. The HZ7B2LTA-E contains no restricted substances above threshold limits and supports standard Pb-free assembly processes without reliability degradation.