Renesas HZU6C3LTRF-E

Overview

HZU6C3LTRF-E from Renesas Electronics is a silicon epitaxial planar Zener diode optimized for hard-knee, low-noise voltage reference applications. It delivers a nominal Zener voltage of 6.2 V at 5 mA, exhibits ultra-low noise voltage (~1/3 to 1/10 that of standard HZU series), and features a temperature coefficient of −0.03 mV/°C - approximately half that of the base HZU series. Its semi-logarithmic linear V_Z–I_Z characteristic from 1 nA to 1 mA supports precision biasing in analog front-ends and sensor signal conditioning circuits.

For engineers reviewing the HZU6C3LTRF-E datasheet, HZU6C3LTRF-E pinout, HZU6C3LTRF-E application, or HZU6C3LTRF-E equivalent, key selection criteria include its hard-knee Zener behavior, ultra-low noise performance, tight ±5% Zener voltage tolerance at I_Z = 5 mA, and suitability for low-current, high-stability reference designs where thermal drift and broadband noise must be minimized.

Technical Context

The HZU6C3LTRF-E belongs to the HZU-LL series, engineered specifically for low-noise voltage references requiring sharp knee characteristics and minimal temperature-induced drift. Its Zener voltage is specified at I_Z = 5 mA with a typical dynamic resistance (Z_ZT) of 380 Ω and a low knee resistance (Z_ZK) of 50 kΩ at I_ZK = 0.5 µA.

It operates within a junction temperature range of −55°C to +150°C and is rated for 150 mW power dissipation at T_a = 25°C, derating linearly above 25°C per Fig.3 in the datasheet. The device's V_Z–I_Z curve maintains semi-logarithmic linearity across six decades of current (1 nA to 1 mA), enabling stable operation in micro-power bias networks.

Key Specifications

Pinout & Package

Package: Ultra Small Resin Package (URP), JEITA code PTSP0002ZA-A, SC-76A outline, mass ≈ 0.004 g. Surface-mount compatible with 1.55 mm × 0.80 mm footprint and 0.45 mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4686T1G and BZX84-C6V2, the HZU6C3LTRF-E offers superior noise performance and tighter thermal stability at the expense of lower power rating - making it optimal for micro-power, high-accuracy analog systems rather than general-purpose voltage clamping.

Availability

HZU6C3LTRF-E is available at Aetrix Electronics and suitable for high-precision sensor biasing, low-noise LDO feedback referencing, and microcontroller analog reference applications requiring stable component supply and long-term parametric consistency.

Supply support for HZU6C3LTRF-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 manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.

The HZU-LL series was developed specifically to address demand for ultra-low-noise, hard-knee Zener references in high-fidelity analog signal chains - targeting applications where traditional Zeners introduce unacceptable noise or thermal drift.

FAQ

What is the Zener voltage tolerance of the HZU6C3LTRF-E at 5 mA?

The HZU6C3LTRF-E has a Zener voltage specification of 5.9 V (min) to 6.5 V (max) at I_Z = 5 mA, corresponding to a ±5% tolerance around the nominal 6.2 V value. This tolerance is guaranteed under DC test conditions per REJ03G1216-0500 Rev.5.00, and applies directly to the HZU6C3LTRF-E variant within the HZU-LL family.

Does the HZU6C3LTRF-E support operation below 1 µA?

Yes, the HZU6C3LTRF-E maintains semi-logarithmic linear V_Z–I_Z behavior down to 1 nA, as confirmed in the datasheet's electrical characteristics table and Fig.1. Its knee resistance Z_ZK is specified at I_ZK = 0.5 µA, and the device remains functional and stable in nanoampere-bias configurations - a key design feature distinguishing the HZU6C3LTRF-E from standard Zeners.

What is the maximum power dissipation of the HZU6C3LTRF-E at 75°C ambient?

Per Fig.3 in REJ03G1216-0500, the HZU6C3LTRF-E's power dissipation derates linearly above 25°C at 1.2 mW/°C. At T_a = 75°C, P_d = 150 mW − (75 − 25) × 1.2 mW = 90 mW. This derated limit must be observed to maintain junction temperature ≤ 150°C and ensure long-term reliability of the HZU6C3LTRF-E.

Is the HZU6C3LTRF-E RoHS compliant and lead-free?

Yes, the HZU6C3LTRF-E is RoHS compliant and lead-free. Renesas confirms compliance with EU RoHS Directive 2011/65/EU for all HZU-LL series devices manufactured after April 2010, including the HZU6C3LTRF-E. The device carries the "lead-free" marking per JEDEC J-STD-609 and uses matte tin termination on its URP package terminals.

How does the noise performance of the HZU6C3LTRF-E compare to the standard HZU series?

The HZU6C3LTRF-E delivers approximately 1/3 to 1/10 the noise voltage of the standard HZU series, as explicitly stated in the "Features" section of REJ03G1216-0500. This reduction is achieved through epitaxial planar process optimization and hard-knee design - a verified characteristic of the HZU6C3LTRF-E and other HZU-LL variants, not extrapolated from generic series data.