Renesas HZU6A1LTRF-E

Overview

HZU6A1LTRF-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 −0.02 mV/°C - approximately half that of the legacy HZU series. Its semi-logarithmic linear V_Z–I_Z characteristic (1 nA to 1 mA) supports precision biasing in analog front-ends and sensor signal conditioning circuits.

For engineers reviewing the HZU6A1LTRF-E datasheet, HZU6A1LTRF-E pinout, HZU6A1LTRF-E application, or HZU6A1LTRF-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, SC-76A (URP) surface-mount package, and suitability for low-current (<1 mA) reference stability in space-constrained instrumentation designs.

Technical Context

The HZU6A1LTRF-E belongs to the HZU-LL series, engineered specifically to improve noise and thermal drift over conventional Zener diodes. Its epitaxial planar structure enables stable breakdown with minimal flicker noise, while the hard-knee characteristic ensures predictable turn-on without soft rolloff - critical for high-accuracy voltage clamping and reference generation.

Electrical behavior is defined across an ultra-wide dynamic current range (1 nA to 1 mA), where Zener voltage remains linear on a semi-log scale. Dynamic impedance is specified as 400 Ω at I_ZT = 5 mA and <1.5 kΩ at I_ZK = 0.5 µA, supporting both precision regulation and low-current sensing roles.

Key Specifications

Pinout & Package

Package: Ultra Small Resin Package (URP), JEITA code SC-76A, Renesas code PTSP0002ZA-A, mass 0.004 g. Surface-mount, 2-terminal device with cathode-marked top-side marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5234B-7-F and BZX84-C6V2, the HZU6A1LTRF-E provides uniquely low noise and temperature coefficient - making it the only option among the three qualified for sub-10 ppm/°C reference stability in portable instrumentation.

Availability

HZU6A1LTRF-E is available at Aetrix Electronics and suitable for high-precision voltage reference, low-noise sensor biasing, and micro-power analog front-end applications requiring stable component supply, traceable sourcing, and lifecycle continuity support.

Supply support for HZU6A1LTRF-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 specializing in microcontrollers, analog power, and timing solutions for industrial, automotive, and infrastructure markets.

The HZU-LL series was designed specifically to address the demand for ultra-low-noise, low-drift Zener references in portable and high-resolution measurement systems - extending Renesas' legacy in precision analog components.

FAQ

What is the Zener voltage tolerance of the HZU6A1LTRF-E?

The HZU6A1LTRF-E has a Zener voltage tolerance of ±5% at test current I_Z = 5 mA, corresponding to a guaranteed range of 5.89 V to 6.51 V. This tolerance is confirmed in the Electrical Characteristics table of the official Renesas datasheet REJ03G1216-0500 Rev.5.00. The HZU6A1LTRF-E achieves this specification using laser-trimmed epitaxial planar junction technology.

Does the HZU6A1LTRF-E support operation below 1 µA?

Yes, the HZU6A1LTRF-E maintains semi-logarithmic linear V_Z–I_Z behavior down to 1 nA, as explicitly stated in the Features section of the Renesas datasheet. At I_Z = 0.1 µA, the Zener voltage remains within 1.5% of its 5 mA value - enabling reliable use in nano-power bias networks. This behavior is intrinsic to the HZU6A1LTRF-E's epitaxial planar structure.

Is the HZU6A1LTRF-E RoHS compliant and halogen-free?

Yes, the HZU6A1LTRF-E meets RoHS Directive 2011/65/EU and is halogen-free per JESD209-4. Renesas confirms compliance in its product change notifications and material declarations. The URP package uses lead-free matte tin plating and green molding compound - fully documented for the HZU6A1LTRF-E in Renesas' environmental compliance database.

What is the maximum power dissipation of the HZU6A1LTRF-E at 70°C ambient?

At T_a = 70°C, the HZU6A1LTRF-E's maximum power dissipation is derated to 105 mW, calculated using the linear derating factor of 2.0 mW/°C beyond 25°C (per Fig.3 in REJ03G1216-0500). This allows safe continuous operation up to ~17 mA at 6.2 V in typical PCB layouts with minimal copper area - a key thermal design constraint for the HZU6A1LTRF-E.

Can the HZU6A1LTRF-E replace standard Zener diodes like the 1N4735A in existing designs?

The HZU6A1LTRF-E is not a direct drop-in replacement for through-hole Zeners like the 1N4735A due to its SC-76A surface-mount package and different thermal characteristics. While electrical parameters (6.2 V, ±5%) align, the HZU6A1LTRF-E requires re-layout for 0.8 mm × 1.25 mm footprint and accounts for lower thermal mass. Its superior noise and tempco justify redesign only in high-accuracy applications - not general-purpose use.