Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Renesas HZ2B3-E

Name: HZ2B3-E
Brand: Renesas
SKU: HZ2B3-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: HZ2B3-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ2B3-E.pdf

Description:: DIODE ZENER 0.5W

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,666

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

HZ2B3-E from Renesas is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 2.1–2.3 V (Grade B3), 500 mW power dissipation, and dynamic resistance ≤100 Ω at 5 mA test current - used in reference voltage generation for analog sensors and microcontroller reset circuits.

For engineers reviewing the HZ2B3-E datasheet, HZ2B3-E pinout, HZ2B3-E application, or HZ2B3-E equivalent, this page delivers verified electrical characteristics, DO-35 package mapping, cathode/anode terminal roles, thermal derating behavior, and direct alternative options for voltage reference design.

Technical Context

The HZ2B3-E operates as a two-terminal shunt regulator with DC-tested zener breakdown at 2.1–2.3 V under 5 mA bias, exhibiting low leakage (<25 µA at 0.5 V) and temperature-stable regulation across −55°C to +175°C storage range. Its planar junction construction ensures consistent rd ≤100 Ω and tight VZ tolerance within Grade B3 specification.

Designed for passive voltage reference use, it requires no external biasing circuitry and functions reliably in series with current-limiting resistors. The device's 175°C maximum junction temperature and DO-35 glass package support operation in compact, thermally constrained PCB layouts without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	2.1–2.3 V at I_Z = 5 mA - defines stable reference point for 2.2 V nominal bias networks
Power Dissipation (P_d)	500 mW at T_a = 25°C - sets maximum continuous power handling before thermal derating
Dynamic Resistance (r_d)	≤100 Ω at I_Z = 5 mA - determines output impedance and load regulation sensitivity
Reverse Leakage Current (I_R)	≤25 µA at V_R = 0.5 V - ensures minimal quiescent current in standby reference circuits
Junction Temperature (T_j)	−55°C to +175°C - enables deployment in industrial and automotive under-hood environments
Package	DO-35 (JEITA GRZZ0002ZB-A) - standard axial glass package with 2.0 mm diameter and 26 mm length

Pinout & Package

DO-35 glass axial package with navy blue cathode band marking; total mass ≈0.13 g; dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 4.2 mm (spacing).

Pin/Terminal	Circuit Role	Design Meaning
1 (banded end)	Cathode	Connected to regulated output node; reverse-biased terminal where zener breakdown occurs
2 (non-banded end)	Anode	Connected to ground or lower-potential rail; completes current path during regulation

Key Features

Feature	Design Value
Low zener impedance	r_d ≤100 Ω ensures <±10 mV output shift under ±1 mA load variation at 5 mA bias
Wide V_Z grade coverage	B3 grade provides 2.1–2.3 V tolerance window for tighter control than A/B/C1–C3 variants in same family
High thermal stability	Specified operation up to +175°C junction temperature supports use in sealed enclosures without heatsinking
Low leakage performance	I_R ≤25 µA at 0.5 V enables battery-powered reference circuits with multi-year shelf life

Applications

Microcontroller Reset Circuit	Analog Sensor Biasing
Use Scenario: Generating a stable 2.2 V threshold for brown-out detection in 3.3 V MCU systems. IC Role / Device Role / Timing Role: Shunt voltage reference defining reset activation level independent of supply ripple. Use Value: Prevents false resets during transient dips by maintaining precise trip point with <±0.1 V drift over −40°C to +85°C.	Use Scenario: Providing excitation voltage to resistive bridge sensors in industrial pressure transducers. IC Role / Device Role / Timing Role: Low-noise DC reference source for ratiometric measurement accuracy. Use Value: Enables <0.5% full-scale error contribution from reference drift due to ≤100 Ω r_d and low tempco.
Portable Instrument Reference	LED Current Regulation
Use Scenario: Supplying fixed bias to op-amp input stages in handheld multimeters. IC Role / Device Role / Timing Role: Passive voltage clamp stabilizing amplifier common-mode input range. Use Value: Maintains ADC linearity by limiting input offset drift to <2 µV/°C via tight V_Z tolerance and low leakage.	Use Scenario: Setting constant current through high-brightness LEDs using resistor-Zener configuration. IC Role / Device Role / Timing Role: Voltage reference establishing I_LED = (V_supply − V_Z)/R_set. Use Value: Delivers ±3% LED brightness consistency across 10–30 V input range due to stable 2.2 V reference and 500 mW power margin.

Microcontroller Reset Circuit

Analog Sensor Biasing

Use Scenario: Generating a stable 2.2 V threshold for brown-out detection in 3.3 V MCU systems.

IC Role / Device Role / Timing Role: Shunt voltage reference defining reset activation level independent of supply ripple.

Use Value: Prevents false resets during transient dips by maintaining precise trip point with <±0.1 V drift over −40°C to +85°C.

Use Scenario: Providing excitation voltage to resistive bridge sensors in industrial pressure transducers.

IC Role / Device Role / Timing Role: Low-noise DC reference source for ratiometric measurement accuracy.

Use Value: Enables <0.5% full-scale error contribution from reference drift due to ≤100 Ω r_d and low tempco.

Portable Instrument Reference

LED Current Regulation

Use Scenario: Supplying fixed bias to op-amp input stages in handheld multimeters.

IC Role / Device Role / Timing Role: Passive voltage clamp stabilizing amplifier common-mode input range.

Use Value: Maintains ADC linearity by limiting input offset drift to <2 µV/°C via tight V_Z tolerance and low leakage.

Use Scenario: Setting constant current through high-brightness LEDs using resistor-Zener configuration.

IC Role / Device Role / Timing Role: Voltage reference establishing I_LED = (V_supply − V_Z)/R_set.

Use Value: Delivers ±3% LED brightness consistency across 10–30 V input range due to stable 2.2 V reference and 500 mW power margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4728A	V_Z = 3.3 V ±5%, P_d = 1 W, DO-41 package, r_d = 10 Ω	Higher voltage and power rating; unsuitable for 2.2 V reference but usable in higher-V_CC reset circuits	Select only if system requires ≥3.3 V reference and board layout accommodates larger DO-41 footprint
BZX55C2V2	V_Z = 2.2 V ±5%, P_d = 500 mW, DO-35 package, r_d = 120 Ω	Nearly identical V_Z, same package, but higher dynamic resistance increases load regulation error	Acceptable drop-in substitute where ±0.1 V regulation tolerance is acceptable and cost is prioritized

Compared with HZ2B3-E, the 1N4728A offers higher power and lower r_d but shifts reference voltage upward by 1.1 V, while BZX55C2V2 matches voltage and package but degrades regulation accuracy by ~20% due to higher r_d - making HZ2B3-E optimal for precision 2.2 V references requiring minimal drift.

Availability

HZ2B3-E is available at Aetrix Electronics and suitable for microcontroller reset circuits, analog sensor biasing, portable instrument references, and LED current regulation requiring stable component supply with guaranteed long-term continuity.

Supply support for HZ2B3-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 IoT applications.

The HZ Series Zener diodes were developed specifically for high-reliability voltage reference and stabilization in space-constrained, thermally demanding power supply designs - emphasizing tight V_Z grading, low leakage, and robust DO-35 packaging.

FAQ

What is the exact zener voltage range specified for HZ2B3-E?

The HZ2B3-E has a guaranteed zener voltage range of 2.1 V to 2.3 V when tested at I_Z = 5 mA and T_a = 25°C, corresponding to Grade B3 in the HZ Series specification table on page 2 of REJ03G0180-0600 Rev.6.00. This tolerance band ensures predictable regulation for 2.2 V nominal reference designs without trimming.

Does HZ2B3-E support operation above 100°C ambient temperature?

Yes, the HZ2B3-E is rated for storage from −55°C to +175°C and junction temperatures up to +175°C. Its DO-35 package allows operation at >100°C ambient when power dissipation remains within derated limits - for example, at 100°C ambient, maximum P_d drops to ~350 mW per Figure 3 in the datasheet, enabling reliable use in enclosed industrial controls.

What is the dynamic resistance value of HZ2B3-E and why does it matter?

The HZ2B3-E has a maximum dynamic resistance (r_d) of 100 Ω at I_Z = 5 mA. This parameter directly affects load regulation: a 1 mA change in zener current causes ≤100 mV output shift. Lower r_d improves stability in variable-load applications such as sensor biasing where supply current fluctuates.

How is polarity identified on the HZ2B3-E package?

The HZ2B3-E uses a navy blue cathode band on the DO-35 glass body to mark Pin 1 (cathode); the unmarked end is the anode (Pin 2). This marking aligns with JEITA standard GRZZ0002ZB-A and is visible under standard visual inspection - critical for correct orientation in series-bias or shunt-regulator configurations.

Can HZ2B3-E replace BZX55C2V2 in existing designs?

The HZ2B3-E can serve as a functional alternative to BZX55C2V2 in 2.2 V reference applications due to matching DO-35 package, voltage grade, and power rating. However, HZ2B3-E offers lower dynamic resistance (≤100 Ω vs. 120 Ω) and tighter V_Z tolerance (±0.1 V vs. ±5%), improving regulation accuracy without PCB changes.

HZ2B3-E Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Voltage - Zener (Nom) (Vz):: -

Tolerance:: -

Power - Max:: -

Impedance (Max) (Zzt):: -

Current - Reverse Leakage @ Vr:: -

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

HZ2B3-E FAQ

1.How can I place an order for HZ2B3-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ2B3-E on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for HZ2B3-E reliable?

The price and inventory of HZ2B3-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ2B3-E is usually 5 days.

3.What payment methods are accepted for HZ2B3-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ2B3-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ2B3-E?

HZ2B3-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ2B3-E order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for HZ2B3-E?

For technical support, including HZ2B3-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ2B3-E requirements.

6.How does Aetrix verify that HZ2B3-E is sourced from the original manufacturer or authorized distributors?

All HZ2B3-E products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HZ2B3-E meets industry standards.

7.What is the process for return or replacement of HZ2B3-E?

All HZ2B3-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ2B3-E, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The HZ2B3-E part is unused and in its original packaging.

Return procedure for HZ2B3-E:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…