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

Renesas HZ6A2JTA-E

Name: HZ6A2JTA-E
Brand: Renesas
SKU: HZ6A2JTA-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZ6A2JTA-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZ6A2JTA-E.pdf

Description:: DIODE ZENER

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Inventory:5,000

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Product details

Overview

HZ6A2JTA-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 5.45 V (min 5.3 V / max 5.6 V), 400 mW power dissipation, 80 Ω dynamic impedance at 0.5 mA test current, and DO-35 glass package with navy-blue cathode band. It serves as a stable reference in low-drift power supplies and sensor biasing networks.

For engineers reviewing the HZ6A2JTA-E datasheet, HZ6A2JTA-E pinout, HZ6A2JTA-E application, or HZ6A2JTA-E equivalent, key selection criteria include its low noise level (≈1/3–1/10 of standard HZ series), tight V_Z tolerance, low leakage, and suitability for low-current stabilized references where thermal drift and spectral noise must be minimized.

Technical Context

This device operates as a two-terminal shunt regulator with DC-tested zener characteristics, designed for operation at I_Z = 0.5 mA. Its junction temperature rating of 175°C and storage range of −55°C to +175°C support industrial and automotive under-hood environments when properly derated.

The HZ6A2JTA-E belongs to the HZ-L Series, distinguished by reduced diode noise and improved zener impedance versus legacy HZ parts. Its temperature coefficient curve (Fig.2) shows minimal drift near 5.5 V - approximately −0.02 %/°C - enabling stable reference performance across ambient variations.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.3 V min / 5.6 V max at I_Z = 0.5 mA - defines precise regulation window for low-voltage reference design
Dynamic Impedance (r_d)	80 Ω max at I_Z = 0.5 mA - ensures minimal output voltage variation under load transients
Power Dissipation (P_d)	400 mW at T_a = 25°C - sets maximum continuous DC power handling before thermal derating applies
Reverse Current (I_R)	1 μA max at V_R = 2.0 V - guarantees low leakage in high-impedance bias networks
Junction Temperature (T_j)	175°C - enables operation in elevated-temperature PCB locations without external heatsinking
Package	DO-35 glass axial - provides hermetic sealing, low parasitic capacitance (<1 pF), and compatibility with wave soldering

Pinout & Package

DO-35 glass axial package with orange body color and navy-blue cathode band. Cathode identified by band; anode is unmarked lead.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated output node; reverse-biased terminal accepting current into diode
2 (Unbanded End)	Anode	Connected to circuit ground or common return; establishes reference potential for V_Z

Key Features

Feature	Design Value
Low-noise Zener operation	Diode noise ≈1/3–1/10 that of standard HZ series - critical for audio preamps and precision ADC references
Tight zener voltage tolerance	±0.15 V at 5.45 V nominal - reduces need for post-regulation trimming in production
Low dynamic impedance	80 Ω max at 0.5 mA - maintains regulation accuracy under varying load currents up to ~1 mA
Hermetic DO-35 packaging	Sealed glass body with 0.13 g mass - ensures long-term stability and moisture resistance in humid environments

Applications

Instrumentation Reference	Low-Noise Audio Biasing
Use Scenario: Precision voltage reference for 16-bit SAR ADC front-end and op-amp offset calibration circuits. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.45 V node for analog signal conditioning. Use Value: Low dynamic impedance and low noise ensure <1 LSB error contribution and no audible hiss in measurement chains.	Use Scenario: Cathode follower bias source for JFET-input microphone preamplifiers. IC Role / Device Role / Timing Role: Low-noise DC bias generator replacing resistive divider to reduce thermal noise floor. Use Value: 1/3–1/10 noise reduction versus standard Zeners directly improves SNR by ≥10 dB in audio paths.
Sensor Excitation Supply	Industrial PLC Analog Input Protection
Use Scenario: Excitation voltage source for strain gauge bridges and RTD sensing elements in process control transmitters. IC Role / Device Role / Timing Role: Stable, low-drift reference for ratiometric measurement systems requiring <0.1% long-term stability. Use Value: −0.02 %/°C tempco minimizes bridge imbalance drift over −40°C to +85°C operating range.	Use Scenario: Overvoltage clamp on 4–20 mA analog input channels in programmable logic controllers. IC Role / Device Role / Timing Role: Transient-suppressing shunt element limiting input voltage to 5.6 V during ESD or surge events. Use Value: 400 mW P_d and 175°C T_j rating allow reliable clamping without thermal runaway in field-deployed modules.

Instrumentation Reference

Low-Noise Audio Biasing

Use Scenario: Precision voltage reference for 16-bit SAR ADC front-end and op-amp offset calibration circuits.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.45 V node for analog signal conditioning.

Use Value: Low dynamic impedance and low noise ensure <1 LSB error contribution and no audible hiss in measurement chains.

Use Scenario: Cathode follower bias source for JFET-input microphone preamplifiers.

IC Role / Device Role / Timing Role: Low-noise DC bias generator replacing resistive divider to reduce thermal noise floor.

Use Value: 1/3–1/10 noise reduction versus standard Zeners directly improves SNR by ≥10 dB in audio paths.

Sensor Excitation Supply

Industrial PLC Analog Input Protection

Use Scenario: Excitation voltage source for strain gauge bridges and RTD sensing elements in process control transmitters.

IC Role / Device Role / Timing Role: Stable, low-drift reference for ratiometric measurement systems requiring <0.1% long-term stability.

Use Value: −0.02 %/°C tempco minimizes bridge imbalance drift over −40°C to +85°C operating range.

Use Scenario: Overvoltage clamp on 4–20 mA analog input channels in programmable logic controllers.

IC Role / Device Role / Timing Role: Transient-suppressing shunt element limiting input voltage to 5.6 V during ESD or surge events.

Use Value: 400 mW P_d and 175°C T_j rating allow reliable clamping without thermal runaway in field-deployed modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MMBZ5225B	Surface-mount SOD-123 package; V_Z = 5.1 V ±5%; r_d = 17 Ω typical at 20 mA - lower impedance but higher test current	Designed for higher-current regulation (>5 mA); unsuitable for ultra-low-noise sub-1 mA biasing	Select only if board space constraints require SMT and noise is secondary to cost and layout density
Vishay BZX55-C5V1	DO-35 package; V_Z = 4.8–5.4 V; r_d = 600 Ω max at 5 mA - higher impedance, wider tolerance, no low-noise specification	General-purpose stabilization only; not characterized for noise-sensitive analog signal chains	Acceptable for non-critical power rail clamping where spectral noise and tempco are not design drivers

Compared with MMBZ5225B and BZX55-C5V1, the HZ6A2JTA-E delivers uniquely low noise and tighter V_Z control at microampere-level operating currents - making it irreplaceable in precision analog reference designs where spectral purity and thermal stability are mandatory.

Availability

HZ6A2JTA-E is available at Aetrix Electronics and suitable for instrumentation reference design, low-noise audio biasing, sensor excitation supply, and industrial PLC analog input protection requiring stable component supply and long-lifecycle continuity.

Supply support for HZ6A2JTA-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 power devices, and timing solutions for industrial, automotive, and infrastructure markets.

The HZ-L Series was developed specifically to address low-noise voltage reference needs in high-fidelity analog signal chains and precision measurement systems - extending Renesas' legacy in discrete Zener technology with enhanced noise and impedance performance.

FAQ

What is the exact zener voltage range specified for HZ6A2JTA-E?

The HZ6A2JTA-E has a guaranteed zener voltage range of 5.3 V minimum to 5.6 V maximum, tested at I_Z = 0.5 mA and T_a = 25°C. This 0.3 V span reflects tight binning within the HZ6A2L variant group and supports accurate low-voltage reference design without external trimming.

Is HZ6A2JTA-E suitable for surface-mount assembly?

No, the HZ6A2JTA-E uses a through-hole DO-35 glass axial package with leads intended for axial insertion and wave or hand soldering. It is not compatible with reflow or pick-and-place processes. For SMT alternatives, consider MMBZ5225B or BZX84-C5V1 - though neither matches its low-noise performance.

How does the noise performance of HZ6A2JTA-E compare to standard Zener diodes?

The HZ6A2JTA-E achieves approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners due to optimized silicon planar structure and low-impedance design. This is verified in Renesas' characterization and makes it suitable for audio preamps, precision ADC references, and other noise-sensitive analog functions.

What is the maximum reverse leakage current for HZ6A2JTA-E?

The HZ6A2JTA-E specifies a maximum reverse leakage current (I_R) of 1 μA at V_R = 2.0 V and T_a = 25°C. This low leakage supports high-impedance bias networks and prevents loading errors in precision reference applications.

Can HZ6A2JTA-E be used in automotive under-hood applications?

Yes - the HZ6A2JTA-E has a junction temperature rating of 175°C and storage range of −55°C to +175°C. When mounted with adequate PCB copper area and derated per Fig.3 (Power Dissipation vs. Ambient Temperature), it meets requirements for non-safety-critical under-hood analog subsystems such as sensor signal conditioning.

HZ6A2JTA-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:: -

HZ6A2JTA-E FAQ

1.How can I place an order for HZ6A2JTA-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZ6A2JTA-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 HZ6A2JTA-E reliable?

The price and inventory of HZ6A2JTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ6A2JTA-E is usually 5 days.

3.What payment methods are accepted for HZ6A2JTA-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ6A2JTA-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZ6A2JTA-E?

HZ6A2JTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZ6A2JTA-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 HZ6A2JTA-E?

For technical support, including HZ6A2JTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ6A2JTA-E requirements.

6.How does Aetrix verify that HZ6A2JTA-E is sourced from the original manufacturer or authorized distributors?

All HZ6A2JTA-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 HZ6A2JTA-E meets industry standards.

7.What is the process for return or replacement of HZ6A2JTA-E?

All HZ6A2JTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ6A2JTA-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 HZ6A2JTA-E part is unused and in its original packaging.

Return procedure for HZ6A2JTA-E:

1.Submit a request within 90 days.

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

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