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Renesas HZ7A1LTD-E
- Part No.:
- HZ7A1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ7A1LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
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Inventory:11,666
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Product details
Overview
HZ7A1LTD-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, 400 mW power dissipation, 60 Ω dynamic impedance at 0.5 mA test current, and DO-35 glass package with navy-blue cathode band. It is used in low-drift voltage references, sensor excitation circuits, and regulated power supply feedback paths where noise performance and thermal stability are critical.
For engineers reviewing the HZ7A1LTD-E datasheet, HZ7A1LTD-E pinout, HZ7A1LTD-E application, or HZ7A1LTD-E equivalent, key selection criteria include zener voltage tolerance (±0.3 V), low noise level (≈1/3–1/10 that of standard HZ series), temperature coefficient (−0.02 %/°C typical at 6.5 V), and DO-35 mechanical compatibility in space-constrained PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a silicon planar junction. Its low dynamic resistance (60 Ω) and tight zener voltage tolerance ensure stable regulation under varying load and temperature conditions. The DO-35 package provides hermetic glass sealing suitable for industrial ambient temperatures (−55°C to +175°C).
The HZ7A1LTD-E exhibits a negative temperature coefficient near 6.5 V (−0.02 %/°C), minimizing drift in mid-range reference applications. Its 400 mW power rating enables use in moderate-current shunt regulator topologies without external heat sinking when ambient temperature remains below 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.3–6.6 V at IZ = 0.5 mA - defines stable reference point for feedback loops and biasing networks |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact shunt regulators without forced cooling |
| Reverse Leakage Current (IR) | 1 μA max at VR = 2.0 V - reduces error contribution in high-impedance reference nodes |
| Junction Temperature (Tj) | 175°C maximum - enables reliable operation in thermally demanding industrial environments |
| Temperature Coefficient (γZ) | −0.02 %/°C typical at 6.5 V - delivers low thermal drift for precision analog signal chains |
Pinout & Package
Package: DO-35 glass axial-leaded package (RENESAS code GRZZ0002ZB-A, JEITA SC-40), orange body with navy-blue cathode band. Dimensions: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm. Mass: 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference terminal | Connected to regulated output node; reverse-biased during normal operation |
| 2 (Anode) | Low-side reference terminal | Typically grounded or connected to current-limiting resistor; establishes reference potential |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈1/3–1/10 that of legacy HZ series - improves SNR in precision instrumentation front-ends |
| Tight zener voltage tolerance | ±0.3 V over 6.3–6.6 V range - reduces calibration burden in factory-trimmed reference designs |
| Stable low-impedance regulation | 60 Ω dynamic resistance at 0.5 mA - maintains regulation accuracy across ±10% load current variation |
| Wide operating temperature range | −55°C to +175°C storage/junction - supports deployment in automotive engine compartments and industrial motor drives |
| Hermetic DO-35 packaging | Glass-sealed axial construction - ensures long-term parameter stability and moisture resistance |
Applications
| Industrial Sensor Signal Conditioning | Low-Drift Analog Front-End Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in PLC modules and process transmitters. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference establishing precise bias point for differential amplifiers and ADC drivers. Use Value: Low dynamic impedance (60 Ω) minimizes gain error from sensor current draw; low noise preserves measurement resolution down to microvolt levels. |
Use Scenario: Generating a clean, stable reference for 16-bit SAR ADCs and programmable gain instrumentation amplifiers in data acquisition systems. IC Role / Device Role / Timing Role: Primary voltage reference source in ratiometric or absolute-reference converter architectures. Use Value: −0.02 %/°C temperature coefficient limits full-scale error to <0.1% over 0–70°C ambient, enabling uncalibrated operation. |
| Compact Linear Power Supply Feedback | Overvoltage Protection Clamp |
Use Scenario: Setting output voltage in 5–12 V linear regulators (e.g., LM317-based designs) where board space prohibits three-terminal IC references. IC Role / Device Role / Timing Role: Shunt reference element in adjustable regulator feedback divider network. Use Value: 400 mW power rating allows direct connection to 10–20 mA feedback current without derating; DO-35 footprint fits dense PCB layouts. |
Use Scenario: Clamping transient overvoltage on microcontroller I/O lines or analog inputs exposed to ESD or inductive switching noise. IC Role / Device Role / Timing Role: Fast-response voltage clamp limiting peak excursion to ≤6.6 V during surge events. Use Value: Low leakage (1 μA max) avoids DC loading of sensitive nodes; glass package withstands repeated 1 kV ESD pulses per IEC 61000-4-2. |
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 |
|---|---|---|---|
| ON Semiconductor MMBZ5231BS | Zener voltage 6.2 V (±5%), 200 mW rating, SOD-123 package, 100 Ω dynamic resistance | Suitable for surface-mount designs with lower power requirements; higher rd increases load regulation error | Choose for automated assembly and space-constrained PCBs where 6.2 V nominal and ±5% tolerance are acceptable |
| Vishay BZX55-C6V2 | Zener voltage 6.2 V (±5%), 500 mW rating, DO-35 package, 100 Ω dynamic resistance, higher noise than HZ-L series | Higher power handling but greater noise and looser tolerance - appropriate for non-critical regulation only | Choose when cost sensitivity outweighs noise and drift requirements, and 6.2 V nominal is sufficient |
Compared with MMBZ5231BS and BZX55-C6V2, the HZ7A1LTD-E offers superior noise performance, tighter voltage tolerance, and lower dynamic resistance in the same DO-35 form factor - making it preferred for precision analog reference and sensor excitation where signal integrity is paramount.
Availability
HZ7A1LTD-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, low-drift analog front-end reference, and compact linear power supply feedback requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for HZ7A1LTD-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 delivering microcontrollers, analog power, and SoC solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in industrial instrumentation and precision analog systems - emphasizing reduced noise, tight tolerance, and robust thermal behavior.
FAQ
What is the zener voltage range of the HZ7A1LTD-E?
The HZ7A1LTD-E has a specified zener voltage range of 6.3 V to 6.6 V at a test current of 0.5 mA. This tight 0.3 V tolerance supports precision voltage reference applications without requiring post-manufacturing trimming. The value is measured under DC conditions per the official Renesas datasheet REJ03G0182-0300 Rev.3.00.
Does the HZ7A1LTD-E have a documented temperature coefficient?
Yes, the HZ7A1LTD-E exhibits a typical temperature coefficient of −0.02 %/°C at 6.5 V, as shown in Figure 2 of the Renesas HZ-L Series datasheet. This negative coefficient helps cancel drift in complementary circuitry and contributes to low overall thermal error in reference designs operating from −40°C to +85°C ambient.
Is the HZ7A1LTD-E compatible with lead-free reflow soldering processes?
The HZ7A1LTD-E uses a DO-35 glass package with axial leads and is rated for a maximum junction temperature of 175°C. While not explicitly qualified for lead-free reflow per J-STD-020, its glass-metal construction and 175°C Tj rating allow safe hand-soldering and wave soldering. For reflow, Renesas recommends verifying thermal profile compatibility with actual board assembly conditions.
What is the maximum reverse leakage current for the HZ7A1LTD-E?
The HZ7A1LTD-E specifies a maximum reverse leakage current (IR) of 1 μA at VR = 2.0 V and Ta = 25°C. This low leakage ensures minimal current diversion in high-impedance reference nodes and preserves accuracy in battery-powered or ultra-low-power sensor interfaces where quiescent current matters.
Can the HZ7A1LTD-E replace standard HZ-series Zener diodes directly?
Yes, the HZ7A1LTD-E is a drop-in replacement for HZ7A1 series diodes in the same DO-35 package, offering identical pinout, mechanical dimensions, and voltage range - but with significantly lower noise (≈1/3–1/10 of standard HZ) and improved dynamic impedance. No PCB changes are required, though layout best practices for low-noise analog grounding should still be followed.
HZ7A1LTD-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:
- -
HZ7A1LTD-E FAQ
1.How can I place an order for HZ7A1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ7A1LTD-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 HZ7A1LTD-E reliable?
The price and inventory of HZ7A1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ7A1LTD-E is usually 5 days.
3.What payment methods are accepted for HZ7A1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ7A1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ7A1LTD-E?
HZ7A1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ7A1LTD-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 HZ7A1LTD-E?
For technical support, including HZ7A1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ7A1LTD-E requirements.
6.How does Aetrix verify that HZ7A1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ7A1LTD-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 HZ7A1LTD-E meets industry standards.
7.What is the process for return or replacement of HZ7A1LTD-E?
All HZ7A1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ7A1LTD-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 HZ7A1LTD-E part is unused and in its original packaging.
Return procedure for HZ7A1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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