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

Renesas HZ3B3JTA-E

Name: HZ3B3JTA-E
Brand: Renesas
SKU: HZ3B3JTA-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ3B3JTA-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ3B3JTA-E.pdf

Description:: DIODE ZENER 0.5W

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

HZ3B3JTA-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 38.0 V (max), 400 mW power dissipation, and dynamic resistance of 300 Ω at 0.5 mA test current - deployed in reference supplies for ADCs, sensor signal conditioning, and low-drift instrumentation amplifiers.

For engineers reviewing the HZ3B3JTA-E datasheet, HZ3B3JTA-E pinout, HZ3B3JTA-E application, or HZ3B3JTA-E equivalent, key selection criteria include zener voltage tolerance (±1.0 V), temperature coefficient (−0.06 %/°C), low noise performance (1/3–1/10 of standard HZ series), and DO-35 package compatibility with through-hole PCB layouts requiring thermal stability up to 175°C junction temperature.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction, with specified DC testing conditions and guaranteed zener voltage range of 36.4 V to 38.0 V at 0.5 mA. Its low dynamic impedance (300 Ω) and tight voltage tolerance support stable biasing in high-resolution measurement front-ends.

The HZ3B3JTA-E exhibits a negative temperature coefficient of −0.06 %/°C, minimizing drift across industrial temperature ranges, and achieves low leakage current (<1 μA at VR = 30 V), enabling use in ultra-low-power standby references where quiescent current must remain sub-microampere.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	36.4 V (min) to 38.0 V (max) at I_Z = 0.5 mA - defines precise clamping threshold for overvoltage protection and reference generation
Power Dissipation (P_d)	400 mW at T_a = 25°C - supports continuous operation in compact through-hole designs without forced cooling
Dynamic Resistance (r_d)	300 Ω max at I_Z = 0.5 mA - ensures minimal output voltage variation under load transients in regulated supplies
Reverse Leakage Current	<1 μA at V_R = 30 V - enables use in battery-powered systems where standby current must be minimized
Temperature Coefficient	−0.06 %/°C - provides predictable, low-drift behavior across −55°C to +125°C ambient operating range
Junction Temperature (T_j)	175°C maximum - allows reliable operation in high-temperature industrial enclosures or near power components

Pinout & Package

Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A, Renesas code SC-40), orange body with navy-blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener breakdown terminal	Connected to higher-potential node; reverse-biased operation requires positive voltage applied here relative to anode
2 (Anode)	Reference ground terminal	Serves as circuit common; establishes stable reference potential when cathode is biased above this point

Key Features

Feature	Design Value
Low-noise Zener operation	Diode noise level reduced to 1/3–1/10 of standard HZ series - critical for audio preamps and precision sensor excitation
Stable voltage reference	Guaranteed 36.4–38.0 V zener range with ±1.0 V tolerance - eliminates need for post-calibration trimming in production
High thermal resilience	Rated for 175°C junction temperature and −55°C to +175°C storage - suitable for automotive under-hood and industrial control environments
Low-leakage design	IR < 1 μA at 30 V reverse bias - preserves battery life in portable instrumentation and remote sensor nodes

Applications

High-Resolution Data Acquisition	Precision Sensor Excitation
Use Scenario: Reference voltage source for 24-bit sigma-delta ADCs in weigh scales and environmental monitors. IC Role / Device Role / Timing Role: Provides stable, low-noise 38 V reference to ADC internal voltage reference buffer and external gain-setting resistors. Use Value: Enables <1 ppm linearity error by minimizing zener voltage drift and noise-induced quantization uncertainty.	Use Scenario: Excitation supply for strain gauge bridges and RTD measurement circuits in process control transmitters. IC Role / Device Role / Timing Role: Delivers constant-voltage bias to bridge arms while rejecting supply ripple and thermal drift. Use Value: Reduces measurement offset drift to <0.5 μV/°C via −0.06 %/°C tempco and sub-μA leakage.
Industrial Power Supply Monitoring	Low-Power Battery Backup Reference
Use Scenario: Overvoltage clamp and threshold detector in 36 V DC input power rails for PLC I/O modules. IC Role / Device Role / Timing Role: Acts as shunt regulator and fault-sensing element that triggers shutdown when input exceeds 38 V. Use Value: Prevents downstream IC damage with 300 Ω dynamic impedance limiting transient energy absorption.	Use Scenario: Standby reference for real-time clock (RTC) supervisors and nonvolatile memory retention in smart meters. IC Role / Device Role / Timing Role: Maintains accurate voltage reference during main power loss, enabling RTC accuracy within ±2 ppm. Use Value: Achieves <1 μA total system standby current due to ultra-low IR and no active bias circuitry.

High-Resolution Data Acquisition

Precision Sensor Excitation

Use Scenario: Reference voltage source for 24-bit sigma-delta ADCs in weigh scales and environmental monitors.

IC Role / Device Role / Timing Role: Provides stable, low-noise 38 V reference to ADC internal voltage reference buffer and external gain-setting resistors.

Use Value: Enables <1 ppm linearity error by minimizing zener voltage drift and noise-induced quantization uncertainty.

Use Scenario: Excitation supply for strain gauge bridges and RTD measurement circuits in process control transmitters.

IC Role / Device Role / Timing Role: Delivers constant-voltage bias to bridge arms while rejecting supply ripple and thermal drift.

Use Value: Reduces measurement offset drift to <0.5 μV/°C via −0.06 %/°C tempco and sub-μA leakage.

Industrial Power Supply Monitoring

Low-Power Battery Backup Reference

Use Scenario: Overvoltage clamp and threshold detector in 36 V DC input power rails for PLC I/O modules.

IC Role / Device Role / Timing Role: Acts as shunt regulator and fault-sensing element that triggers shutdown when input exceeds 38 V.

Use Value: Prevents downstream IC damage with 300 Ω dynamic impedance limiting transient energy absorption.

Use Scenario: Standby reference for real-time clock (RTC) supervisors and nonvolatile memory retention in smart meters.

IC Role / Device Role / Timing Role: Maintains accurate voltage reference during main power loss, enabling RTC accuracy within ±2 ppm.

Use Value: Achieves <1 μA total system standby current due to ultra-low IR and no active bias circuitry.

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
1N4749A (ON Semiconductor)	Zener voltage 24 V (fixed), 1 W rating, rd = 15 Ω, higher noise, TO-204AA package	Higher power handling but wider voltage tolerance (±5 %) and no low-noise optimization	Select only if 24 V reference and higher P_d are required; not suitable for 38 V or low-noise use cases
BZX85C39 (Nexperia)	Zener voltage 39 V (±5 %), 1.3 W, rd = 90 Ω, DO-41 package, no specified low-noise characterization	Larger package footprint, looser voltage tolerance, unverified noise performance	Acceptable for general-purpose 39 V clamping where noise and drift are non-critical

Compared with 1N4749A and BZX85C39, the HZ3B3JTA-E delivers tighter voltage tolerance (±1.0 V vs. ±5 %), lower noise, and verified −0.06 %/°C tempco - making it uniquely suited for metrology-grade references where long-term stability and spectral purity are mandatory.

Availability

HZ3B3JTA-E is available at Aetrix Electronics and suitable for high-precision data acquisition, industrial sensor interfaces, and low-power backup reference circuits requiring stable component supply with full traceability and lifecycle management.

Supply support for HZ3B3JTA-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, and power devices for automotive, industrial, and IoT applications.

The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced flicker noise, tight voltage tolerance, and robust thermal performance.

FAQ

What is the exact zener voltage range for HZ3B3JTA-E?

The HZ3B3JTA-E has a guaranteed zener voltage range of 36.4 V (minimum) to 38.0 V (maximum) when tested at I_Z = 0.5 mA and T_a = 25°C. This 1.6 V span reflects its ±1.0 V absolute tolerance specification, ensuring predictable clamping behavior without binning or calibration in production.

Is HZ3B3JTA-E suitable for low-noise audio applications?

Yes, the HZ3B3JTA-E is explicitly characterized for low-noise operation - its noise level is approximately 1/3 to 1/10 that of the standard HZ series. This makes it appropriate for high-fidelity audio preamplifier biasing, microphone phantom power references, and DAC output buffering where spectral purity is critical.

What is the maximum allowable reverse voltage before breakdown for HZ3B3JTA-E?

The HZ3B3JTA-E begins controlled zener breakdown at its specified V_Z range (36.4–38.0 V). It is not rated for sustained reverse voltage below breakdown; however, leakage remains <1 μA at 30 V reverse bias. Operation above 38.0 V must be limited by series current limiting to stay within the 400 mW power dissipation limit.

Does HZ3B3JTA-E have a specified temperature coefficient?

Yes, the HZ3B3JTA-E has a measured temperature coefficient of −0.06 %/°C, as confirmed in Figure 2 of the official Renesas datasheet REJ03G0182-0300. This negative coefficient enables predictable, low-drift behavior across industrial temperature ranges and supports compensation in precision analog designs.

Can HZ3B3JTA-E replace standard 1N47xx series diodes in existing designs?

No - the HZ3B3JTA-E is not a drop-in replacement for 1N47xx diodes due to differences in zener voltage (36.4–38.0 V vs. fixed values like 36 V or 39 V), tighter tolerance, lower noise, and distinct thermal characteristics. Circuit revalidation is required, especially for noise-sensitive or drift-critical applications.

HZ3B3JTA-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:: -

HZ3B3JTA-E FAQ

1.How can I place an order for HZ3B3JTA-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ3B3JTA-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 HZ3B3JTA-E reliable?

The price and inventory of HZ3B3JTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ3B3JTA-E is usually 5 days.

3.What payment methods are accepted for HZ3B3JTA-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ3B3JTA-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ3B3JTA-E?

HZ3B3JTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ3B3JTA-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 HZ3B3JTA-E?

For technical support, including HZ3B3JTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ3B3JTA-E requirements.

6.How does Aetrix verify that HZ3B3JTA-E is sourced from the original manufacturer or authorized distributors?

All HZ3B3JTA-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 HZ3B3JTA-E meets industry standards.

7.What is the process for return or replacement of HZ3B3JTA-E?

All HZ3B3JTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ3B3JTA-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 HZ3B3JTA-E part is unused and in its original packaging.

Return procedure for HZ3B3JTA-E:

1.Submit a request within 90 days.

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

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