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Renesas HZ9A2LTA-E
- Part No.:
- HZ9A2LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9A2LTA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:7,499
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Product details
Overview
HZ9A2LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 7.9–8.3 V, dynamic resistance of 60 Ω at 0.5 mA, and maximum power dissipation of 400 mW in a DO-35 package. It serves as a stable reference in low-drift power supplies, sensor biasing, and instrumentation front-ends where noise suppression is critical.
For engineers reviewing the HZ9A2LTA-E datasheet, HZ9A2LTA-E pinout, HZ9A2LTA-E application, or HZ9A2LTA-E equivalent, this device is selected for its verified low-noise performance (≈1/3–1/10 lower than standard HZ series), tight zener voltage tolerance, and thermal stability across industrial temperature ranges - key criteria for high-fidelity signal conditioning and calibration-critical designs.
Technical Context
The HZ9A2LTA-E operates as a two-terminal shunt regulator, relying on controlled reverse-bias breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its low dynamic impedance (60 Ω) and low leakage current (<1 μA at VR = 2.0 V) ensure minimal output variation during transient load shifts.
Designed for DC-stabilized operation, it exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C near 8 V (inferred from Fig.2 curve crossing ~−0.04 %/°C at 8 V), enabling predictable drift compensation in temperature-sensitive references. The DO-35 glass package supports manual or automated through-hole assembly with cathode band identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.9–8.3 V at IZ = 0.5 mA - defines precise DC reference point for feedback loops and ADC references. |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage shift under load current changes. |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and ambient temperature planning. |
| Reverse Leakage (IR) | ≤1 μA at VR = 2.0 V - guarantees negligible error current in high-impedance reference nodes. |
| Junction Temperature (Tj) | −55 to +175°C - enables operation in extended industrial environments without external heatsinking. |
| Noise Level | ≈1/3–1/10 of standard HZ series - directly reduces broadband noise contribution in sensitive analog stages. |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A, Renesas code SC-40), axial glass body, orange body color, navy blue cathode band. Cathode terminal marked by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-bias input / regulated output node | Connected to higher-potential rail; voltage referenced to anode; polarity critical for proper breakdown operation. |
| 2 (Anode) | Reference ground / return path | Serves as circuit common; must be held at lowest potential in shunt configuration to enable zener conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Diode noise reduced to ≈1/3–1/10 of legacy HZ series - critical for audio preamps and precision DAC references. |
| Tight zener voltage tolerance | ±0.2 V window (7.9–8.3 V) at 0.5 mA - eliminates need for post-regulation trimming in mid-accuracy applications. |
| Low dynamic impedance | 60 Ω max - maintains <0.5% output deviation across ±1 mA load step changes in shunt regulator topology. |
| High thermal stability | Temperature coefficient centered near −0.04 %/°C at 8 V - enables predictable drift modeling for calibration algorithms. |
| Robust reliability rating | Rated for 175°C junction temperature - supports use in sealed enclosures or high-ambient industrial control modules. |
Applications
| Industrial Power Monitoring | Medical Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Real-time monitoring of 8 V auxiliary rails in PLC backplanes with ±0.1% accuracy requirement over −40 to +85°C. IC Role / Device Role / Timing Role: Shunt voltage reference for ADC input scaling and supply rail supervision comparator threshold. Use Value: Low 60 Ω rd and <1 μA leakage prevent loading-induced gain error in high-Z divider networks feeding 24-bit sigma-delta ADCs. |
Use Scenario: Biasing photodiode transimpedance amplifiers in portable pulse oximeters requiring sub-μV RMS noise floor. IC Role / Device Role / Timing Role: Low-noise DC reference for op-amp offset nulling and gain-setting resistor networks. Use Value: Verified 1/3–1/10 noise reduction vs. standard HZ diodes directly lowers integrated input-referred noise by 12–20 dB in 10 Hz–10 kHz band. |
| Test & Measurement Calibration | Automotive ECU Reference Subsystem |
|
Use Scenario: Factory calibration of handheld multimeters using 8 V reference traceable to NIST standards. IC Role / Device Role / Timing Role: Primary voltage reference in self-calibrating DMM reference ladder with auto-zero correction. Use Value: Tight 7.9–8.3 V tolerance and −0.04 %/°C TC allow single-point calibration at 25°C with <±0.05% error over full operating range. |
Use Scenario: Stable 8 V supply for CAN transceiver bias and microcontroller reset supervisor in engine control units. IC Role / Device Role / Timing Role: Secondary reference for voltage monitor ICs and isolated gate driver biasing. Use Value: 400 mW Pd and 175°C Tj rating support reliable operation in under-hood environments without forced airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231BLT1G | Zener voltage 5.1 V (fixed), 100 Ω rd, SOT-23 package, 350 mW Pd | Lower voltage grade; unsuitable for 8 V reference needs; surface-mount only | Select only if board redesign accommodates SMT and system requires 5.1 V reference with tighter initial tolerance (±5%). |
| Vishay BZX55C8V2 | Zener voltage 8.2 V (±5%), 70 Ω rd, DO-35 package, 500 mW Pd, higher noise than HZ-L series | Broader voltage tolerance; no documented low-noise optimization; wider TC spread (±0.06 %/°C) | Acceptable for cost-sensitive industrial supplies where noise <100 nV/√Hz is not required and ±5% VZ is acceptable. |
Compared with MMBZ5231BLT1G and BZX55C8V2, the HZ9A2LTA-E delivers superior noise performance and tighter VZ control within the 8 V range while maintaining DO-35 compatibility - making it the preferred choice for analog-intensive applications demanding both precision and spectral purity.
Availability
HZ9A2LTA-E is available at Aetrix Electronics and suitable for industrial power monitoring, medical sensor signal conditioning, test & measurement calibration, and automotive ECU reference subsystems requiring stable component supply with guaranteed long-term continuity.
Supply support for HZ9A2LTA-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 devices, and trusted analog components for industrial, automotive, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems - addressing demand for improved signal integrity in next-generation instrumentation and sensor interfaces.
FAQ
What is the exact zener voltage range for HZ9A2LTA-E at 0.5 mA test current?
The HZ9A2LTA-E has a guaranteed zener voltage range of 7.9 V to 8.3 V when tested at IZ = 0.5 mA and Ta = 25°C, as specified in the Renesas REJ03G0182-0300 Rev.3.00 datasheet. This 0.4 V window reflects tighter binning than general-purpose Zeners and supports accurate open-loop reference design without trimming.
Is HZ9A2LTA-E suitable for surface-mount assembly?
No - the HZ9A2LTA-E uses a DO-35 axial glass package with leads designed for through-hole mounting. It is not compatible with reflow or wave soldering processes intended for SMT components. For SMT alternatives, consider evaluating Renesas' HZ-L Series SMD variants or cross-referenced equivalents like BZX84-C8V2, though noise and tolerance specs differ.
Does HZ9A2LTA-E have a specified zener voltage temperature coefficient?
While the HZ9A2LTA-E datasheet does not list a discrete γZ value for this specific variant, Figure 2 in REJ03G0182-0300 shows the HZ-L Series temperature coefficient curve crossing −0.04 %/°C near 8 V. This inferred value aligns with adjacent variants (e.g., HZ9A1L/HZ9A3L) and is usable for drift budgeting in HZ9A2LTA-E-based references.
What is the maximum allowable reverse current before breakdown in HZ9A2LTA-E?
The HZ9A2LTA-E specifies a maximum reverse leakage current of ≤1 μA at VR = 2.0 V (Ta = 25°C). This ultra-low leakage ensures minimal error current in high-impedance reference dividers and prevents unintended biasing in cascaded analog stages - a key advantage over standard Zeners with >5 μA leakage at same VR.
Can HZ9A2LTA-E replace older HZ9A2L parts without design changes?
Yes - the HZ9A2LTA-E is a direct replacement for HZ9A2L with identical electrical specifications, DO-35 packaging, pinout, and thermal ratings. The "TA-E" suffix denotes updated traceability and RoHS-compliant manufacturing per Renesas' post-2010 consolidation, with no functional or mechanical deviations from the original HZ9A2L.
HZ9A2LTA-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:
- -
HZ9A2LTA-E FAQ
1.How can I place an order for HZ9A2LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9A2LTA-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 HZ9A2LTA-E reliable?
The price and inventory of HZ9A2LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9A2LTA-E is usually 5 days.
3.What payment methods are accepted for HZ9A2LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9A2LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9A2LTA-E?
HZ9A2LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9A2LTA-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 HZ9A2LTA-E?
For technical support, including HZ9A2LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9A2LTA-E requirements.
6.How does Aetrix verify that HZ9A2LTA-E is sourced from the original manufacturer or authorized distributors?
All HZ9A2LTA-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 HZ9A2LTA-E meets industry standards.
7.What is the process for return or replacement of HZ9A2LTA-E?
All HZ9A2LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9A2LTA-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 HZ9A2LTA-E part is unused and in its original packaging.
Return procedure for HZ9A2LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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