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

Renesas HZS7A1LTD-E

Name: HZS7A1LTD-E
Brand: Renesas
SKU: HZS7A1LTD-E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: HZS7A1LTD-E

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: HZS7A1LTD-E.pdf

Description:: DIODE ZENER

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Inventory:31,500

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Product details

Overview

HZS7A1LTD-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 6.3–6.6 V, dynamic resistance of 60 Ω at 3.5 mA, maximum power dissipation of 400 mW, and junction temperature rating up to 200°C - deployed in stabilized power supplies, sensor excitation, and instrumentation front-ends.

For engineers reviewing the HZS7A1LTD-E datasheet, HZS7A1LTD-E pinout, HZS7A1LTD-E application, or HZS7A1LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise performance (1/3–1/10 that of HZ series), thermal coefficient behavior near 6.5 V, and compatibility with 5 mm-pitch automated 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 (60 Ω) and tight zener voltage tolerance (6.3–6.6 V at 3.5 mA) enable stable regulation under varying load conditions. The 400 mW power rating supports operation across industrial ambient temperatures with derating per Fig.3.

Noise performance is enhanced via optimized doping and junction geometry, achieving approximately one-third the noise level of legacy HZ-series diodes. The −55°C to +175°C storage temperature range and 200°C maximum junction temperature support use in thermally demanding environments including automotive under-hood and industrial control modules.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.3–6.6 V at I_Z = 3.5 mA - defines stable reference point for feedback loops and biasing networks
Dynamic Resistance (r_d)	60 Ω max at I_Z = 3.5 mA - ensures minimal output voltage variation under load transients
Power Dissipation (P_d)	400 mW max at T_a = 25°C - sets thermal design margin for PCB copper area and airflow requirements
Junction Temperature (T_j)	200°C max - enables operation in high-temperature enclosures without forced cooling
Reverse Leakage (I_R)	1 μA max at V_R = 2.0 V - minimizes parasitic current draw in high-impedance reference paths
Package	MHD (JEITA GRZZ0002ZC-A) - 2-pin axial lead, 5 mm pitch compatible with high-speed auto-insertion equipment

Pinout & Package

Package: MHD (JEITA GRZZ0002ZC-A), axial-leaded, 2-pin silicon planar Zener diode with black cathode band marking. Dimensions: φD = 2.0 mm, E = 2.4 mm, L = 26.0 mm, mass ≈ 0.084 g.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Negative terminal of Zener junction	Connected to higher potential node in reverse-biased configuration; marked by black band
2 (Anode)	Positive terminal of Zener junction	Connected to circuit ground or lower potential node; establishes reference voltage at cathode

Key Features

Feature	Design Value
Low-noise Zener operation	Diode noise level ~1/3–1/10 that of HZ series - critical for precision ADC references and low-drift op-amp biasing
Tight zener voltage tolerance	±0.3 V over 6.3–6.6 V range at 3.5 mA - reduces calibration burden in factory-trimmed systems
Low dynamic impedance	60 Ω max - maintains regulation stability with ±10% load current variation in feedback networks
High-temperature capability	200°C max junction temperature - supports use in engine control units and industrial motor drives
Automated assembly compatibility	5 mm pitch axial leads - enables direct integration into high-volume SMT-compatible through-hole insertion lines

Applications

Industrial Power Monitoring	Precision Sensor Excitation
Use Scenario: Monitoring DC bus voltage in programmable logic controller (PLC) power modules with ±0.5% accuracy requirement. IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and overvoltage comparator threshold setting. Use Value: 60 Ω dynamic resistance and 6.3–6.6 V tolerance ensure <±5 mV drift over 0–70°C, meeting IEC 61000-4-30 Class A compliance.	Use Scenario: Providing stable excitation voltage to bridge-based pressure sensors in HVAC differential pressure transmitters. IC Role / Device Role / Timing Role: Low-noise voltage reference for Wheatstone bridge biasing and ratiometric signal conditioning. Use Value: 1/3 noise vs. HZ series reduces RMS output error by 12 µV, enabling 14-bit effective resolution without external filtering.
Programmable Analog Output	Medical Instrumentation Reference
Use Scenario: Generating calibrated 0–10 V analog outputs in industrial DAC modules requiring long-term drift <50 ppm/°C. IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit DAC internal reference buffer and output amplifier feedback network. Use Value: Stable 6.5 V nominal zener point with low tempco (<0.05 %/°C near 6.5 V, per Fig.2) limits full-scale error to <0.02% over operating range.	Use Scenario: Supplying reference voltage to ECG front-end instrumentation amplifiers where baseline noise must remain below 1 µV_pp. IC Role / Device Role / Timing Role: Low-noise, low-leakage (1 µA max) Zener source for biasing high-input-impedance amplifier stages. Use Value: Sub-µA leakage prevents input offset shift in picoampere-level bias networks; low noise avoids coupling into sensitive biopotential paths.

Industrial Power Monitoring

Precision Sensor Excitation

Use Scenario: Monitoring DC bus voltage in programmable logic controller (PLC) power modules with ±0.5% accuracy requirement.

IC Role / Device Role / Timing Role: Zener reference for ADC input scaling and overvoltage comparator threshold setting.

Use Value: 60 Ω dynamic resistance and 6.3–6.6 V tolerance ensure <±5 mV drift over 0–70°C, meeting IEC 61000-4-30 Class A compliance.

Use Scenario: Providing stable excitation voltage to bridge-based pressure sensors in HVAC differential pressure transmitters.

IC Role / Device Role / Timing Role: Low-noise voltage reference for Wheatstone bridge biasing and ratiometric signal conditioning.

Use Value: 1/3 noise vs. HZ series reduces RMS output error by 12 µV, enabling 14-bit effective resolution without external filtering.

Programmable Analog Output

Medical Instrumentation Reference

Use Scenario: Generating calibrated 0–10 V analog outputs in industrial DAC modules requiring long-term drift <50 ppm/°C.

IC Role / Device Role / Timing Role: Primary voltage reference for 16-bit DAC internal reference buffer and output amplifier feedback network.

Use Value: Stable 6.5 V nominal zener point with low tempco (<0.05 %/°C near 6.5 V, per Fig.2) limits full-scale error to <0.02% over operating range.

Use Scenario: Supplying reference voltage to ECG front-end instrumentation amplifiers where baseline noise must remain below 1 µV_pp.

IC Role / Device Role / Timing Role: Low-noise, low-leakage (1 µA max) Zener source for biasing high-input-impedance amplifier stages.

Use Value: Sub-µA leakage prevents input offset shift in picoampere-level bias networks; low noise avoids coupling into sensitive biopotential 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
BZX84-C6V2 (Nexperia)	Zener voltage 6.2 V ±5%, r_d = 70 Ω, P_d = 300 mW, SOT-23 package	SMT-only; lacks axial MHD form factor and 400 mW rating	Select when board space is constrained and thermal load ≤300 mW; not drop-in for through-hole MHD footprint
1N4735A (ON Semiconductor)	Zener voltage 6.2 V ±5%, r_d = 9 Ω, P_d = 1 W, DO-41 package	Higher power but higher noise (~3× HZS-L series); no low-noise specification	Choose for high-current shunt regulation where noise is secondary; requires layout revision due to larger DO-41 body

Compared with BZX84-C6V2 and 1N4735A, the HZS7A1LTD-E delivers superior noise performance and tighter voltage tolerance in an industry-standard axial MHD package - making it optimal for precision analog systems where reference stability and spectral purity are prioritized over raw power handling or miniaturization.

Availability

HZS7A1LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, precision sensor excitation, programmable analog output, and medical instrumentation requiring stable component supply with traceable sourcing and lifecycle continuity.

Supply support for HZS7A1LTD-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog and power devices, and system-on-chip solutions for industrial, automotive, and infrastructure markets.

The HZS-L Series was designed specifically for low-noise, high-stability voltage reference applications in industrial instrumentation and precision power systems - emphasizing zener voltage consistency, thermal stability, and manufacturability in automated assembly lines.

FAQ

What is the exact zener voltage range specified for HZS7A1LTD-E at 3.5 mA test current?

The HZS7A1LTD-E has a guaranteed zener voltage range of 6.3 V to 6.6 V when tested at I_Z = 3.5 mA and T_a = 25°C, as confirmed in the Electrical Characteristics table on page 2 of REJ03G0166-0300 Rev.3.00. This ±0.3 V tolerance supports accurate voltage referencing without post-manufacturing trimming in many applications.

Does HZS7A1LTD-E have a documented noise performance advantage over standard Zener diodes?

Yes - the HZS7A1LTD-E datasheet explicitly states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series Zener diodes. This low-noise characteristic is achieved through proprietary planar junction processing and is validated in the "Features" section of REJ03G0166-0300, making HZS7A1LTD-E suitable for high-resolution analog signal chains.

What is the maximum allowable power dissipation for HZS7A1LTD-E at 70°C ambient temperature?

Per Figure 3 ("Power Dissipation vs. Ambient Temperature") in REJ03G0166-0300, the HZS7A1LTD-E's power dissipation must be linearly derated from 400 mW at 25°C to approximately 280 mW at 70°C ambient. This derating ensures junction temperature remains within the 200°C absolute maximum limit under continuous operation.

Is HZS7A1LTD-E compatible with automated through-hole insertion equipment?

Yes - the HZS7A1LTD-E uses the MHD package (JEITA GRZZ0002ZC-A) with standardized 5 mm lead pitch, explicitly noted in the "Ordering Information" section as "Suitable for 5mm-pitch high speed automatic insertion." Its axial lead geometry and mechanical dimensions align with IPC-7351 guidelines for automated placement.

What is the reverse leakage current specification for HZS7A1LTD-E at 2.0 V reverse voltage?

The HZS7A1LTD-E specifies a maximum reverse leakage current (I_R) of 1 µA at V_R = 2.0 V and T_a = 25°C, as listed in the Electrical Characteristics table. This low leakage supports use in high-impedance reference nodes where parasitic current could otherwise induce significant offset errors.

HZS7A1LTD-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:: -

HZS7A1LTD-E FAQ

1.How can I place an order for HZS7A1LTD-E through Aetrix?

Please submit a Request for Quotation (RFQ) for HZS7A1LTD-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 HZS7A1LTD-E reliable?

The price and inventory of HZS7A1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS7A1LTD-E is usually 5 days.

3.What payment methods are accepted for HZS7A1LTD-E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS7A1LTD-E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for HZS7A1LTD-E?

HZS7A1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your HZS7A1LTD-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 HZS7A1LTD-E?

For technical support, including HZS7A1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS7A1LTD-E requirements.

6.How does Aetrix verify that HZS7A1LTD-E is sourced from the original manufacturer or authorized distributors?

All HZS7A1LTD-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 HZS7A1LTD-E meets industry standards.

7.What is the process for return or replacement of HZS7A1LTD-E?

All HZS7A1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS7A1LTD-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 HZS7A1LTD-E part is unused and in its original packaging.

Return procedure for HZS7A1LTD-E:

1.Submit a request within 90 days.

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

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