Renesas HZ9C1LTA-E

Overview

HZ9C1LTA-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 8.9–9.3 V, 400 mW power dissipation, 60 Ω dynamic impedance at 0.5 mA test current, and noise level approximately 1/3–1/10 that of standard HZ-series diodes - used in reference supplies for ADCs, sensor signal conditioning, and low-drift op-amp biasing.

For engineers reviewing the HZ9C1LTA-E datasheet, HZ9C1LTA-E pinout, HZ9C1LTA-E application, or HZ9C1LTA-E equivalent, this device is selected for stable low-noise voltage reference generation where thermal drift, leakage current (<1 μA at VR = 2.0 V), and zener impedance directly impact measurement accuracy and long-term stability in industrial instrumentation and medical front-end electronics.

Technical Context

The HZ9C1LTA-E operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for DC-biased reverse breakdown operation. Its low-noise performance stems from optimized silicon planar junction fabrication and tight control of surface recombination, enabling use in high-resolution data acquisition systems where 1/f noise must be minimized.

It exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−3.6 mV/°C) near 9 V, consistent with the "knee" region of zener-dominated breakdown, and maintains stable regulation across ambient temperatures from −55°C to +175°C with derated power dissipation above 25°C.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5239B and BZX55-C9V1, the HZ9C1LTA-E delivers verified low-noise operation and tighter dynamic impedance critical for 16+ bit data conversion, while maintaining identical DO-35 packaging and cathode-anode pinout for drop-in replacement in existing low-noise reference designs.

Availability

HZ9C1LTA-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, medical instrumentation reference supply, and programmable logic controller (PLC) analog input modules requiring stable component supply with guaranteed long-term continuity.

Supply support for HZ9C1LTA-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 advanced SoCs for industrial, automotive, and infrastructure markets.

The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - targeting instrumentation, medical diagnostics, and test equipment where conventional Zener diodes introduce unacceptable noise or drift.

FAQ

What is the exact zener voltage range for HZ9C1LTA-E at 0.5 mA test current?

The HZ9C1LTA-E has a guaranteed zener voltage range of 8.9 V to 9.3 V when measured at I_Z = 0.5 mA and T_a = 25°C, per Renesas datasheet REJ03G0182-0300 Rev.3.00. This tight 0.4 V span supports high-accuracy reference design without post-manufacturing trimming, and the value remains stable across its qualified operating temperature range.

Does HZ9C1LTA-E have a specified noise performance metric, and how does it compare to standard Zener diodes?

Yes - the HZ9C1LTA-E datasheet explicitly states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series. This low-noise characteristic results from Renesas' optimized silicon planar junction process and surface passivation, making HZ9C1LTA-E suitable for high-resolution ADC references and low-drift op-amp biasing where broadband and 1/f noise degrade signal fidelity.

What is the maximum power dissipation and thermal derating behavior of HZ9C1LTA-E?

HZ9C1LTA-E is rated for 400 mW maximum power dissipation at T_a = 25°C, with linear derating to zero at 175°C junction temperature. Its thermal resistance (R_θJA) is approximately 438°C/W in free air on FR-4 PCB, meaning power must be reduced by ~3.2 mW/°C above 25°C ambient - critical for compact industrial modules where airflow is restricted.

Is HZ9C1LTA-E suitable for automotive applications, and what quality grade does it carry?

HZ9C1LTA-E is classified as a "Standard" quality grade device per Renesas documentation, intended for computers, office equipment, communications gear, and industrial robots - not for automotive safety-critical or transportation systems. It is not AEC-Q200 qualified, and Renesas explicitly restricts its use in vehicles unless separately approved via written consent.

What package type and pin configuration does HZ9C1LTA-E use, and is it compatible with automated assembly?

HZ9C1LTA-E uses the DO-35 axial glass package (JEITA code GRZZ0002ZB-A) with navy-blue cathode band and orange body. Its 2-pin cathode-anode layout supports standard tape-and-reel feeding and wave/solder-reflow processes. The 2.0 mm diameter and 26 mm length comply with SC-40 mechanical standards, ensuring compatibility with legacy Zener placement tooling and AOI inspection systems.