Renesas HZU24B1TRF-E

Overview

HZU24B1TRF-E from Renesas Electronics is a silicon planar Zener diode in ultra-small URP (SC-76A) surface-mount package, designed for precision voltage stabilization at 24 V nominal Zener voltage (25.10–28.90 V range), with 2 mW reverse current limit at 22 V, 19 Ω dynamic resistance at 5 mA test current, and 200 mW power dissipation - used in low-power reference and overvoltage protection circuits in industrial sensor interfaces and power supply feedback paths.

For engineers reviewing the HZU24B1TRF-E datasheet, HZU24B1TRF-E pinout, HZU24B1TRF-E application, or HZU24B1TRF-E equivalent, key selection criteria include its ±2% Zener voltage tolerance (B1 grade), low thermal coefficient (−0.04 %/°C typical), SC-76A footprint compatibility, and suitability for space-constrained DC-DC converter references and ESD-tolerant I/O clamping.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar junction structure ensures consistent breakdown characteristics and low leakage, with specified operation up to 150 °C junction temperature and storage from –55 to +150 °C.

The device is rated for 200 mW power dissipation at 25 °C ambient, derating linearly above 25 °C per Fig. 3 in the datasheet, and exhibits a negative temperature coefficient of approximately –0.04 %/°C near 24 V, enabling predictable drift behavior in temperature-sensitive references.

Key Specifications

Pinout & Package

Ultra-small Resin Package (URP), JEITA code SC-76A, Renesas package code PTSP0002ZA-A, dimensions 0.8 mm × 0.8 mm × 0.45 mm, mass 0.004 g, surface-mount compatible with standard 0201 land pattern.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C24LT1G and MMSZ5245B-TP, HZU24B1TRF-E offers superior voltage accuracy (±2% vs. ±5%), smallest PCB footprint (0.8 × 0.8 mm), and optimized thermal performance for miniaturized industrial modules - making it ideal where precision and density outweigh raw power headroom.

Availability

HZU24B1TRF-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, compact DC-DC converter feedback loops, and low-power analog signal conditioning requiring stable component supply and long-term obsolescence support.

Supply support for HZU24B1TRF-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 is a global semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure applications.

HZU24B1TRF-E belongs to the HZU Series silicon planar Zener diodes - engineered for high-precision, low-profile voltage stabilization in space-constrained power management and signal conditioning systems.

FAQ

What is the Zener voltage range for HZU24B1TRF-E?

The HZU24B1TRF-E has a guaranteed Zener voltage range of 25.10 V to 28.90 V at 2 mA test current, corresponding to the B1 grade specification. This ±2% tolerance band ensures tight regulation for precision reference applications, and the value is measured under pulsed conditions (40 ms pulse width) to minimize self-heating effects. The HZU24B1TRF-E maintains this range across its full operating temperature span.

What package type does HZU24B1TRF-E use and what are its dimensions?

HZU24B1TRF-E uses the Ultra-small Resin Package (URP), also known as SC-76A, with exact dimensions of 0.8 mm × 0.8 mm × 0.45 mm and a mass of 0.004 g. It features a two-terminal surface-mount configuration with cathode marked on terminal 1. The package is compatible with standard 0201 land patterns and supports reflow soldering per J-STD-020 guidelines.

What is the maximum power dissipation of HZU24B1TRF-E and how does it vary with temperature?

HZU24B1TRF-E has a maximum power dissipation of 200 mW at 25 °C ambient temperature. Above 25 °C, power rating decreases linearly per the derating curve in Figure 3 of the datasheet, reaching zero at approximately 125 °C ambient. This thermal derating ensures safe operation within the 150 °C maximum junction temperature limit under real-world board-level thermal conditions.

How does the dynamic resistance of HZU24B1TRF-E affect its regulation performance?

The dynamic resistance of HZU24B1TRF-E is specified at ≤19 Ω at 5 mA Zener current, directly determining how much the output voltage changes with load current variation. A lower r_d means better load regulation - for example, a 1 mA load shift causes less than 19 mV output deviation. This makes HZU24B1TRF-E suitable for applications demanding stable voltage despite small current fluctuations, such as op-amp biasing or reference divider networks.

Is HZU24B1TRF-E RoHS compliant and lead-free?

Yes, HZU24B1TRF-E is RoHS compliant and lead-free, consistent with Renesas Electronics' environmental policy and EU Directive 2011/65/EU. The device meets all applicable restrictions on hazardous substances, including lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. Full compliance documentation is available through Renesas' official product pages and authorized distribution channels for HZU24B1TRF-E.