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

Renesas HZ7B3RE-E

Name: HZ7B3RE-E
Brand: Renesas
SKU: HZ7B3RE-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ7B3RE-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ7B3RE-E.pdf

Description:: DIODE ZENER 0.5W

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Inventory:16,000

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Product details

Overview

HZ7B3RE-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 7.0–7.3 V at 0.5 mA test current, dynamic resistance of 60 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C - deployed in reference voltage sources and sensor signal conditioning.

For engineers reviewing the HZ7B3RE-E datasheet, HZ7B3RE-E pinout, HZ7B3RE-E application, or HZ7B3RE-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 of standard HZ series), DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.

Technical Context

This device operates as a two-terminal voltage reference with cathode-anode polarity, designed for DC-biased stabilization where low dynamic impedance (60 Ω) and minimal temperature coefficient (−0.04 %/°C typical near 7 V) ensure stable output under varying load and ambient conditions.

Its silicon planar construction enables reproducible breakdown characteristics and low leakage (<1 μA at VR = 2.0 V), while the DO-35 glass package supports manual or automated through-hole assembly in space-constrained analog PCBs requiring high reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.0–7.3 V at I_Z = 0.5 mA - defines precise DC reference level for feedback loops or biasing networks
Dynamic Resistance (r_d)	60 Ω max at I_Z = 0.5 mA - ensures minimal output voltage variation under small-signal load changes
Power Dissipation (P_d)	400 mW max at T_a = 25°C - sets thermal derating limit for continuous operation in compact layouts
Junction Temperature (T_j)	175°C max - enables use in high-temperature industrial environments without thermal shutdown
Reverse Leakage (I_R)	≤1 μA at V_R = 2.0 V - minimizes error current in high-impedance reference nodes
Temperature Coefficient	≈−0.04 %/°C near 7 V - provides predictable, low-drift voltage reference over operating range

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Negative terminal of reverse-biased junction	Connected to regulated output node; polarity must be observed to maintain zener conduction
2 (Anode)	Positive terminal of reverse-biased junction	Typically grounded or tied to lower potential; completes current path during regulation

Key Features

Feature	Design Value
Low-noise Zener operation	Noise level ≈1/3–1/10 that of standard HZ series - critical for audio preamps and precision ADC references
Stable low-impedance regulation	r_d = 60 Ω max ensures <1 mV output shift per 60 μA load change - improves PSRR in analog front-ends
Wide operating temperature range	T_stg = −55°C to +175°C - supports deployment in automotive engine control and industrial motor drives
Controlled zener voltage tolerance	±0.3 V window at 7.15 V nominal - reduces calibration burden in factory-trimmed instrumentation

Applications

High-Precision Reference Source	Low-Noise Sensor Signal Conditioning
Use Scenario: Providing stable 7.15 V reference for 16-bit SAR ADCs in data acquisition systems. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing accurate input scaling and offset nulling. Use Value: Low dynamic resistance (60 Ω) and low noise suppress quantization error and improve effective number of bits (ENOB).	Use Scenario: Biasing bridge-based pressure sensors in medical transducers where microvolt-level drift matters. IC Role / Device Role / Timing Role: Zener-regulated excitation source maintaining constant sensor bridge current despite supply ripple. Use Value: Sub-1 μA leakage and −0.04 %/°C tempco minimize zero-point drift and thermal hysteresis in calibrated outputs.
Industrial Power Supply Feedback	Analog Front-End Voltage Clamp
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for programmable logic controllers. IC Role / Device Role / Timing Role: Shunt regulator feeding optocoupler LED to close isolation barrier feedback loop. Use Value: 400 mW power rating allows direct dissipation of feedback current without external series resistor.	Use Scenario: Protecting op-amp inputs from transient overvoltage in battery-powered IoT node analog inputs. IC Role / Device Role / Timing Role: Bidirectional clamping element (with series diode) limiting input swing to ±7.3 V. Use Value: Tight 7.0–7.3 V zener window ensures predictable clamping threshold without excessive headroom loss.

High-Precision Reference Source

Low-Noise Sensor Signal Conditioning

Use Scenario: Providing stable 7.15 V reference for 16-bit SAR ADCs in data acquisition systems.

IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing accurate input scaling and offset nulling.

Use Value: Low dynamic resistance (60 Ω) and low noise suppress quantization error and improve effective number of bits (ENOB).

Use Scenario: Biasing bridge-based pressure sensors in medical transducers where microvolt-level drift matters.

IC Role / Device Role / Timing Role: Zener-regulated excitation source maintaining constant sensor bridge current despite supply ripple.

Use Value: Sub-1 μA leakage and −0.04 %/°C tempco minimize zero-point drift and thermal hysteresis in calibrated outputs.

Industrial Power Supply Feedback

Analog Front-End Voltage Clamp

Use Scenario: Secondary-side voltage sensing in isolated flyback converters for programmable logic controllers.

IC Role / Device Role / Timing Role: Shunt regulator feeding optocoupler LED to close isolation barrier feedback loop.

Use Value: 400 mW power rating allows direct dissipation of feedback current without external series resistor.

Use Scenario: Protecting op-amp inputs from transient overvoltage in battery-powered IoT node analog inputs.

IC Role / Device Role / Timing Role: Bidirectional clamping element (with series diode) limiting input swing to ±7.3 V.

Use Value: Tight 7.0–7.3 V zener window ensures predictable clamping threshold without excessive headroom loss.

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
BZX84-C7V5 (Diodes Inc.)	Zener voltage 7.5 V ±5%, r_d = 15 Ω typical, SOT-23 package, P_d = 300 mW	SMT-only, lower power rating, tighter voltage tolerance but higher tempco (±0.07 %/°C)	Preferred for space-constrained PCBs where 7.5 V suffices and surface-mount assembly is mandatory
1N4733A (ON Semiconductor)	Zener voltage 5.1 V ±5%, r_d = 9 Ω, DO-41 package, P_d = 1 W	Higher power, lower voltage, significantly higher noise than HZ-L series	Used where higher dissipation is needed and noise sensitivity is secondary to cost and availability

Compared with BZX84-C7V5 and 1N4733A, the HZ7B3RE-E delivers superior low-noise performance and tighter voltage binning at 7.15 V, making it optimal for high-fidelity analog reference design - though its DO-35 through-hole form factor requires different layout and assembly planning.

Availability

HZ7B3RE-E is available at Aetrix Electronics and suitable for precision reference sources, low-noise sensor interfaces, and industrial power supply feedback circuits requiring stable component supply, long-term parametric consistency, and traceable Renesas manufacturing.

Supply support for HZ7B3RE-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 leader specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced flicker noise and improved thermal coefficient behavior versus legacy HZ-family parts.

FAQ

What is the exact zener voltage range specified for HZ7B3RE-E?

The HZ7B3RE-E has a guaranteed zener voltage range of 7.0 V to 7.3 V when tested at I_Z = 0.5 mA and T_a = 25°C. This 0.3 V window reflects tight process control for precision reference use, and the typical value is 7.15 V. The specification is confirmed in Renesas document REJ03G0182-0300 Rev.3.00, Page 2, Electrical Characteristics table.

Is HZ7B3RE-E compatible with standard DO-35 footprint designs?

Yes, HZ7B3RE-E uses the JEITA-standard DO-35 package (Renesas code GRZZ0002ZB-A), with 2.0 mm body diameter and 26.0 mm overall length. Its axial leads and orange body with navy blue cathode band match industry-standard DO-35 mechanical dimensions, enabling drop-in replacement in existing through-hole layouts designed for DO-35 Zener diodes.

How does the noise performance of HZ7B3RE-E compare to conventional Zener diodes?

HZ7B3RE-E achieves approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners due to its silicon planar structure and optimized doping profile. This low-noise characteristic is explicitly documented in the "Features" section of REJ03G0182-0300 and makes HZ7B3RE-E suitable for audio preamplifiers, precision DAC references, and other noise-sensitive analog functions.

What is the maximum allowable reverse current before regulation degrades in HZ7B3RE-E?

HZ7B3RE-E maintains stable regulation up to its rated test current of 0.5 mA, with dynamic resistance specified at that point. Operation beyond 1 mA is possible within the 400 mW power limit (e.g., up to ~56 mA at 7.15 V), but rd increases and noise rises - datasheet characterization focuses on 0.5 mA for spec compliance. Derating above 25°C is required per Fig.3 on Page 4.

Does HZ7B3RE-E have a specified temperature coefficient, and how does it affect accuracy?

Yes, HZ7B3RE-E exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C near its 7.15 V operating point, as shown in Fig.2 (Page 4). This translates to about −2.87 mV/°C drift, enabling predictable compensation in temperature-critical applications like laboratory instrumentation and calibrated sensor modules.

HZ7B3RE-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:: -

HZ7B3RE-E FAQ

1.How can I place an order for HZ7B3RE-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ7B3RE-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 HZ7B3RE-E reliable?

The price and inventory of HZ7B3RE-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7B3RE-E is usually 5 days.

3.What payment methods are accepted for HZ7B3RE-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7B3RE-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ7B3RE-E?

HZ7B3RE-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ7B3RE-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 HZ7B3RE-E?

For technical support, including HZ7B3RE-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7B3RE-E requirements.

6.How does Aetrix verify that HZ7B3RE-E is sourced from the original manufacturer or authorized distributors?

All HZ7B3RE-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 HZ7B3RE-E meets industry standards.

7.What is the process for return or replacement of HZ7B3RE-E?

All HZ7B3RE-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7B3RE-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 HZ7B3RE-E part is unused and in its original packaging.

Return procedure for HZ7B3RE-E:

1.Submit a request within 90 days.

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

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