Renesas HZ5CLLTD-E

Overview

HZ5CLLTD-E from Renesas Electronics is a silicon planar Zener diode optimized for hard-knee, low-noise voltage reference applications at low current (IZ = 0.5 mA), with a nominal zener voltage of 4.9–5.3 V, dynamic impedance of 380 Ω at IZT = 0.5 mA, and temperature coefficient as low as –0.04 %/°C - used in precision analog front-ends and sensor biasing circuits.

For engineers reviewing the HZ5CLLTD-E datasheet, HZ5CLLTD-E pinout, HZ5CLLTD-E application, or HZ5CLLTD-E equivalent, key selection criteria include its sharp breakdown knee below 1 mA, ultra-low reverse leakage (<100 nA at VR = 4.0 V), DO-35 glass package compatibility, and suitability for low-power reference design where thermal drift and noise must be minimized.

Technical Context

The HZ5CLLTD-E employs a planar diffusion structure to achieve semi-logarithmic VZ–IZ linearity from 1 nA to 1 mA, enabling stable regulation even under microampere-level bias currents. Its hard-knee behavior stems from controlled avalanche characteristics rather than tunneling, yielding lower noise and improved repeatability versus conventional Zeners.

Designed for operation at IZK = 0.5 µA minimum, it delivers ∆VZ1 = 0.5 V (between 0.05 mA and 0.5 mA) and ∆VZ2 = 0.6 V (between 0.001 mA and 0.05 mA), confirming tight low-current voltage stability. The device operates within a junction temperature range of –55°C to +175°C and is rated for 250 mW power dissipation at 25°C ambient.

Key Specifications

Pinout & Package

Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), 2.0 mm diameter × 26.0 mm length, cathode identified by navy-blue band, mass ≈ 0.13 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BS and BZX55-C5V1, the HZ5CLLTD-E uniquely delivers verified hard-knee behavior and 1/10 lower noise below 1 mA - making it the only option among the three qualified for precision micro-power analog signal chains requiring <100 nA leakage and <0.6 V low-current VZ variation.

Availability

HZ5CLLTD-E is available at Aetrix Electronics and suitable for industrial sensor biasing, portable instrument reference, medical front-end calibration, and automotive cabin controller applications requiring stable component supply with traceable lot history and long-term lifecycle support.

Supply support for HZ5CLLTD-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 automotive, industrial, and IoT applications, with headquarters in Tokyo and R&D centers worldwide.

The HZ-LL Series was designed specifically for low-noise, hard-knee Zener reference applications demanding superior low-current stability and minimal temperature drift - targeting high-accuracy analog signal conditioning in resource-constrained systems.

FAQ

What is the exact zener voltage range for HZ5CLLTD-E at 0.5 mA test current?

The HZ5CLLTD-E has a guaranteed zener voltage range of 4.9 V to 5.3 V when measured at IZ = 0.5 mA, per Renesas datasheet REJ03G0183-0300 Rev.3.00. This range reflects manufacturing tolerance and ensures consistent performance across production lots without requiring post-manufacturing sorting. The HZ5CLLTD-E achieves this specification using planar diffusion process control and on-wafer screening.

Does HZ5CLLTD-E support operation below 1 µA reverse current?

Yes, the HZ5CLLTD-E is characterized down to IZ = 1 nA and maintains semi-logarithmic VZ–IZ linearity through that range, with ∆VZ2 = 0.6 V defined between 0.001 mA and 0.05 mA. Its hard-knee behavior remains effective at sub-microampere levels, making the HZ5CLLTD-E suitable for ultra-low-power sensor biasing where current budgets are constrained to tens of nanoamperes.

Is HZ5CLLTD-E RoHS compliant and lead-free?

Yes, the HZ5CLLTD-E meets EU RoHS Directive requirements and is lead-free. Renesas confirms compliance in product change notices and material declarations aligned with JEDEC J-STD-609. The DO-35 glass package contains no restricted substances above threshold limits, and the HZ5CLLTD-E is rated for "Standard" quality grade applications including industrial and office equipment.

What is the maximum allowable power dissipation for HZ5CLLTD-E at 70°C ambient?

Per the derating curve in Figure 3 of the HZ5CLLTD-E datasheet, power dissipation must be linearly reduced from 250 mW at 25°C to approximately 150 mW at 70°C ambient. This corresponds to a derating factor of 1.67 mW/°C above 25°C. Exceeding this limit risks exceeding the 175°C maximum junction temperature and permanent degradation of the HZ5CLLTD-E's zener characteristics.

Can HZ5CLLTD-E replace standard Zener diodes like 1N4733A in existing designs?

The HZ5CLLTD-E is not a direct drop-in replacement for 1N4733A due to fundamental differences: the 1N4733A is rated at 5.1 V ±5% at 49 mA, while the HZ5CLLTD-E is specified at 4.9–5.3 V at 0.5 mA with hard-knee behavior. Substituting the HZ5CLLTD-E requires redesigning the bias network to operate at microampere currents and verifying low-noise performance - the HZ5CLLTD-E excels where the 1N4733A cannot perform.