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Renesas HZ9B2LTD-E
- Part No.:
- HZ9B2LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9B2LTD-E.pdf
- Description:
- DIODE ZENER
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Inventory:7,500
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Product details
Overview
HZ9B2LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 8.5–8.9 V at 0.5 mA, 400 mW power dissipation, and dynamic impedance of 6.0 Ω - enabling stable reference performance in low-current biasing applications such as sensor signal conditioning and instrumentation amplifiers.
For engineers reviewing the HZ9B2LTD-E datasheet, HZ9B2LTD-E pinout, HZ9B2LTD-E application, or HZ9B2LTD-E equivalent, this device is selected for noise-sensitive DC reference design where low zener impedance, tight voltage tolerance, and minimal temperature coefficient drift are critical - especially when replacing legacy HZ-series diodes requiring improved noise floor and thermal stability.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current of 0.5 mA and maximum reverse current of 1 μA at VR = 2.0 V. Its low-noise design achieves approximately 1/3–1/10 the noise level of standard HZ-series diodes, verified under DC test conditions per REJ03G0182-0300 Rev.3.00.
The device uses a DO-35 glass package (RENESAS code GRZZ0002ZB-A, JEITA SC-40), with cathode band marking and orange body color. It exhibits a zener voltage temperature coefficient of −0.04 %/°C (≈ −0.34 mV/°C) near 8.7 V, supporting stable operation across −55°C to +175°C storage and up to 175°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.5–8.9 V at IZ = 0.5 mA - defines precise DC reference point for low-power analog stages |
| Dynamic Impedance (rd) | 6.0 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 PCB layouts without forced cooling |
| Reverse Leakage Current | ≤1 μA at VR = 2.0 V - prevents unwanted current draw in high-impedance bias networks |
| Temperature Coefficient | −0.04 %/°C (≈ −0.34 mV/°C) - enables predictable drift compensation in temperature-varying environments |
| Junction Temperature (Tj) | 175°C max - allows reliable use in industrial ambient conditions up to +125°C with proper derating |
Pinout & Package
Package: DO-35 glass axial lead 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) | Breakdown voltage terminal | Connected to higher-potential node; reverse-biased operation establishes regulated voltage drop |
| 2 (Anode) | Reference ground terminal | Typically tied to circuit common; forms return path for zener bias current and load current |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈ 1/3–1/10 that of standard HZ series - directly improves SNR in precision ADC references |
| Tight zener voltage tolerance | ±0.2 V window at 8.7 V nominal - reduces calibration burden in factory-trimmed analog modules |
| Low dynamic impedance | 6.0 Ω max - maintains <1 mV output shift under ±100 μA load variations |
| High thermal stability | −0.04 %/°C tempco - limits drift to <±0.5 mV over 0–70°C ambient range |
| Robust reliability rating | Standard quality grade - qualified for office equipment, test instruments, and industrial automation systems |
Applications
| Instrumentation Amplifier Reference | Thermocouple Cold-Junction Compensation |
|---|---|
|
Use Scenario: Provides stable bias voltage for op-amp input stage in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Zener reference source establishing fixed common-mode voltage for differential input amplification. Use Value: Low 6.0 Ω impedance minimizes gain error from sensor-source impedance interaction, while low noise preserves microvolt-level signal integrity. |
Use Scenario: Supplies reference voltage for cold-junction compensation circuitry in industrial temperature transmitters. IC Role / Device Role / Timing Role: Precision DC reference generating offset correction proportional to ambient temperature. Use Value: −0.04 %/°C tempco aligns closely with thermocouple Seebeck coefficient drift, reducing net system error below ±0.2°C over −20°C to +85°C. |
| Photodiode Transimpedance Bias | ADC Voltage Reference Buffer |
|
Use Scenario: Biases photodiode anode in low-light optical sensing modules used in medical pulse oximeters. IC Role / Device Role / Timing Role: Low-noise DC bias generator maintaining reverse-bias voltage across photodiode junction. Use Value: 1/3–1/10 lower noise than HZ-series suppresses baseline flicker in sub-nA photocurrent measurements, improving detection limit by >15 dB. |
Use Scenario: Stabilizes reference input to 16-bit SAR ADCs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Secondary reference buffer isolating ADC REF+ pin from supply ripple and digital switching noise. Use Value: 400 mW power rating supports parallel capacitor filtering without thermal runaway, ensuring long-term reference stability over 10-year field life. |
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 MMBZ5233BLT1G | Zener voltage 8.7 V ±5%, rd = 10 Ω, Pd = 300 mW, SOT-23 package | SMT-compatible but higher impedance and wider tolerance - suitable only where board space constraints outweigh noise requirements | Select only if DO-35 axial footprint is unavailable and noise budget allows ≥2× higher dynamic impedance |
| Vishay BZX55-C8V2 | Zener voltage 8.2 V ±5%, rd = 15 Ω, Pd = 500 mW, DO-35 package | Higher tempco (−0.08 %/°C) and noise - acceptable for non-critical power rail clamping but not precision references | Prefer for overvoltage protection in 9 V supply rails; avoid in analog signal chains requiring <10 μV/°C drift |
Compared with MMBZ5233BLT1G and BZX55-C8V2, the HZ9B2LTD-E delivers superior noise performance and tighter voltage control in the same DO-35 form factor - making it the preferred choice for metrology-grade analog subsystems where reference stability directly impacts measurement accuracy.
Availability
HZ9B2LTD-E is available at Aetrix Electronics and suitable for instrumentation amplifier reference, thermocouple cold-junction compensation, and photodiode transimpedance bias applications requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZ9B2LTD-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 timing 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 test equipment and precision analog signal chains - addressing limitations of earlier HZ-series parts in noise-sensitive DC biasing.
FAQ
What is the zener voltage tolerance of HZ9B2LTD-E at 0.5 mA test current?
The HZ9B2LTD-E has a zener voltage range of 8.5 V to 8.9 V at IZ = 0.5 mA, yielding a ±0.2 V absolute tolerance centered on 8.7 V. This tight window reduces post-manufacturing calibration effort in precision analog modules and supports direct replacement of older HZ6B2L variants without circuit redesign.
Does HZ9B2LTD-E meet RoHS compliance requirements?
Yes, the HZ9B2LTD-E complies with EU RoHS Directive requirements as confirmed by Renesas Electronics' environmental documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits, and is suitable for environmentally regulated industrial and commercial end products.
Can HZ9B2LTD-E be used in place of HZ9B2L without modification?
Yes, HZ9B2LTD-E is a direct functional and mechanical replacement for HZ9B2L - sharing identical DO-35 package dimensions, pinout, zener voltage range (8.5–8.9 V), and electrical specifications. The "TD-E" suffix denotes updated manufacturing and traceability per Renesas' post-merger part numbering convention, with no performance or reliability changes.
What is the maximum allowable ambient temperature for continuous operation of HZ9B2LTD-E?
The HZ9B2LTD-E supports continuous operation up to +125°C ambient temperature when derated per its power dissipation curve (Fig.3). At 25°C, full 400 mW is allowed; at 100°C, maximum dissipation drops to ~220 mW. Junction temperature must remain ≤175°C, requiring appropriate PCB copper area and airflow in sealed enclosures.
How does the noise performance of HZ9B2LTD-E compare to standard Zener diodes?
The HZ9B2LTD-E achieves approximately 1/3–1/10 the noise level of conventional HZ-series Zener diodes, as measured under identical DC test conditions. This reduction directly improves signal-to-noise ratio in applications like photodiode biasing and instrumentation amplifier references, where diode-generated noise contributes measurably to system floor.
HZ9B2LTD-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:
- -
HZ9B2LTD-E FAQ
1.How can I place an order for HZ9B2LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9B2LTD-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 HZ9B2LTD-E reliable?
The price and inventory of HZ9B2LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9B2LTD-E is usually 5 days.
3.What payment methods are accepted for HZ9B2LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9B2LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9B2LTD-E?
HZ9B2LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9B2LTD-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 HZ9B2LTD-E?
For technical support, including HZ9B2LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9B2LTD-E requirements.
6.How does Aetrix verify that HZ9B2LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ9B2LTD-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 HZ9B2LTD-E meets industry standards.
7.What is the process for return or replacement of HZ9B2LTD-E?
All HZ9B2LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9B2LTD-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 HZ9B2LTD-E part is unused and in its original packaging.
Return procedure for HZ9B2LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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