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

Renesas HZS6A2LTD-E

Name: HZS6A2LTD-E
Brand: Renesas
SKU: HZS6A2LTD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS6A2LTD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS6A2LTD-E.pdf

Description:: DIODE ZENER

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Inventory:15,000

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Product details

Overview

HZS6A2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization 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, and dynamic resistance of 150 Ω at 0.5 mA test current - deployed in stabilized power supplies, sensor excitation, and ADC reference buffers.

For engineers reviewing the HZS6A2LTD-E datasheet, HZS6A2LTD-E pinout, HZS6A2LTD-E application, or HZS6A2LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.15 V), low noise performance (≈1/3–1/10 of HZ series), junction temperature rating (200°C), and compatibility with 5 mm-pitch high-speed automatic insertion.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its low dynamic impedance (150 Ω) and tight zener voltage tolerance support stable regulation under varying load and temperature conditions. The diode exhibits a negative temperature coefficient near 5.5 V, typical for low-voltage Zeners.

Designed for DC-biased operation only (per datasheet note), it delivers consistent reverse-bias behavior with leakage current ≤1 μA at VR = 2.0 V. Its thermal design accommodates ambient temperatures up to 125°C before derating begins, per Fig.3's power dissipation vs. ambient curve.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.3 V to 5.6 V at I_Z = 0.5 mA - ensures precise 5.45 V nominal reference with ±0.15 V tolerance for stable biasing.
Dynamic Resistance (r_d)	150 Ω max at I_Z = 0.5 mA - minimizes output voltage variation under load transients in reference circuits.
Power Dissipation (P_d)	400 mW at T_a = 25°C - supports continuous operation in compact PCB layouts without forced cooling.
Junction Temperature (T_j)	200°C maximum - enables reliable operation in high-temperature industrial environments.
Reverse Leakage (I_R)	≤1 μA at V_R = 2.0 V - reduces error contribution in high-impedance reference nodes.
Noise Performance	≈1/3–1/10 lower than HZ series - critical for low-noise instrumentation amplifiers and precision ADC references.
Package	MHD (JEITA GRZZ0002ZC-A) - standardized 2-pin axial lead package compatible with 5 mm-pitch automated insertion.

Pinout & Package

Package: MHD (axial lead, JEITA code GRZZ0002ZC-A), 2.0 mm diameter body, 26 mm overall length, 0.4 mm lead diameter, cathode band marked in black.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	High-side terminal, connected to positive supply/reference node	Accepts reverse bias; polarity marking essential for correct orientation in shunt regulator topologies.
2 (Anode)	Low-side terminal, connected to ground or return path	Completes current path during zener conduction; must be routed with low-inductance grounding for noise control.

Key Features

Feature	Design Value
Ultra-low noise performance	Reduces broadband voltage noise in precision references by factor of 3–10 versus legacy HZ series.
Tight zener voltage tolerance	±0.15 V window at 5.45 V enables direct replacement in 5 V reference designs without recalibration.
Low dynamic impedance	150 Ω maintains <1 mV output shift per 0.1 mA load change - critical for high-resolution DAC/ADC buffers.
High thermal robustness	200°C junction rating allows operation in sealed enclosures or near heat-generating components.
Automated assembly compatibility	MHD package supports 5 mm-pitch pick-and-place and wave soldering - reduces manufacturing cost in volume production.

Applications

Industrial Sensor Signal Conditioning	Precision ADC Reference Buffer
Use Scenario: Providing stable excitation voltage to strain gauges and RTDs in factory-floor transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed bias point for bridge circuits. Use Value: Low noise and tight V_Z tolerance minimize measurement drift and improve 16-bit ADC effective resolution.	Use Scenario: Supplying clean, low-drift reference to SAR or delta-sigma ADCs in data acquisition modules. IC Role / Device Role / Timing Role: Passive voltage reference source for analog input channel accuracy. Use Value: 150 Ω r_d and <1 μA leakage prevent reference loading errors and maintain INL/DNL specs.
Programmable Logic Controller (PLC) Power Supervision	Medical Diagnostic Instrument Biasing
Use Scenario: Monitoring 5 V rail integrity in DIN-rail mounted PLC I/O modules. IC Role / Device Role / Timing Role: Zener-based overvoltage clamp and brown-out detection element. Use Value: 400 mW P_d and 200°C T_j ensure reliability during sustained overvoltage events in industrial settings.	Use Scenario: Generating stable bias for photodiode preamplifiers in portable ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise DC reference for op-amp feedback networks. Use Value: Ultra-low noise floor preserves signal-to-noise ratio in weak RF echo signal amplification paths.

Industrial Sensor Signal Conditioning

Precision ADC Reference Buffer

Use Scenario: Providing stable excitation voltage to strain gauges and RTDs in factory-floor transmitters.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed bias point for bridge circuits.

Use Value: Low noise and tight V_Z tolerance minimize measurement drift and improve 16-bit ADC effective resolution.

Use Scenario: Supplying clean, low-drift reference to SAR or delta-sigma ADCs in data acquisition modules.

IC Role / Device Role / Timing Role: Passive voltage reference source for analog input channel accuracy.

Use Value: 150 Ω r_d and <1 μA leakage prevent reference loading errors and maintain INL/DNL specs.

Programmable Logic Controller (PLC) Power Supervision

Medical Diagnostic Instrument Biasing

Use Scenario: Monitoring 5 V rail integrity in DIN-rail mounted PLC I/O modules.

IC Role / Device Role / Timing Role: Zener-based overvoltage clamp and brown-out detection element.

Use Value: 400 mW P_d and 200°C T_j ensure reliability during sustained overvoltage events in industrial settings.

Use Scenario: Generating stable bias for photodiode preamplifiers in portable ultrasound front-ends.

IC Role / Device Role / Timing Role: Low-noise DC reference for op-amp feedback networks.

Use Value: Ultra-low noise floor preserves signal-to-noise ratio in weak RF echo signal amplification paths.

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
1N4733A (ON Semiconductor)	Zener voltage 5.1 V ±5%, r_d = 9 Ω, P_d = 1 W, higher noise than HZS6A2LTD-E	Higher power handling but wider V_Z tolerance and no low-noise optimization	Select when higher power margin is required and noise is secondary to cost.
BZX55C5V1 (Vishay)	Zener voltage 5.1 V ±5%, r_d ≈ 60 Ω, P_d = 500 mW, standard noise level	Larger V_Z deviation and uncharacterized noise performance vs. HZS-L series	Choose for general-purpose regulation where ultra-low noise is not mandated.

Compared with 1N4733A and BZX55C5V1, HZS6A2LTD-E offers tighter voltage tolerance, documented ultra-low noise, and optimized dynamic impedance for precision analog systems - though at lower power rating and higher unit cost.

Availability

HZS6A2LTD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, precision ADC reference buffering, and PLC power supervision requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.

Supply support for HZS6A2LTD-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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

HZS6A2LTD-E belongs to the HZS-L Series of low-noise silicon planar Zener diodes, engineered specifically for high-stability voltage reference applications demanding minimal noise and tight parametric control.

FAQ

What is the nominal zener voltage of HZS6A2LTD-E and its tolerance range?

HZS6A2LTD-E has a nominal zener voltage of 5.45 V, with a guaranteed range of 5.3 V to 5.6 V at 0.5 mA test current. This ±0.15 V tolerance supports accurate 5 V system referencing without external trimming. The specification is verified per Renesas REJ03G0166-0300 Rev.3.00 test conditions and applies across the full operating temperature range.

Is HZS6A2LTD-E suitable for high-frequency noise-sensitive applications?

Yes, HZS6A2LTD-E is explicitly characterized for low-noise operation - its noise level is approximately 1/3 to 1/10 that of the legacy HZ series. This makes HZS6A2LTD-E appropriate for precision analog signal chains, including photodiode biasing and high-resolution ADC references where broadband voltage noise directly impacts measurement fidelity.

What package type does HZS6A2LTD-E use and what are its mechanical dimensions?

HZS6A2LTD-E uses the MHD axial-leaded package (JEITA code GRZZ0002ZC-A), with a 2.0 mm body diameter, 26 mm overall length, and 0.4 mm lead diameter. The cathode is marked with a black band. This package is qualified for 5 mm-pitch high-speed automatic insertion and complies with standard wave-soldering profiles.

What is the maximum power dissipation and thermal limit for HZS6A2LTD-E?

HZS6A2LTD-E has a maximum power dissipation of 400 mW at 25°C ambient and a maximum junction temperature of 200°C. Derating begins above 25°C per the published curve in Fig.3, reaching ~200 mW at 125°C ambient. These ratings enable reliable operation in enclosed industrial enclosures without active cooling.

Does HZS6A2LTD-E support DC-only operation or can it handle AC-coupled signals?

HZS6A2LTD-E is specified for DC operation only, as explicitly noted in the Renesas datasheet (REJ03G0166-0300, Note 1). Its electrical characteristics - including V_Z, r_d, and noise - are measured under steady-state DC bias. AC or transient operation outside the DC-rated conditions is not characterized and may compromise stability or longevity of HZS6A2LTD-E.

HZS6A2LTD-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:: -

HZS6A2LTD-E FAQ

1.How can I place an order for HZS6A2LTD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS6A2LTD-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 HZS6A2LTD-E reliable?

The price and inventory of HZS6A2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS6A2LTD-E is usually 5 days.

3.What payment methods are accepted for HZS6A2LTD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS6A2LTD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS6A2LTD-E?

HZS6A2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS6A2LTD-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 HZS6A2LTD-E?

For technical support, including HZS6A2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS6A2LTD-E requirements.

6.How does Aetrix verify that HZS6A2LTD-E is sourced from the original manufacturer or authorized distributors?

All HZS6A2LTD-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 HZS6A2LTD-E meets industry standards.

7.What is the process for return or replacement of HZS6A2LTD-E?

All HZS6A2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS6A2LTD-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 HZS6A2LTD-E part is unused and in its original packaging.

Return procedure for HZS6A2LTD-E:

1.Submit a request within 90 days.

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

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