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Renesas HZ9A3LTD-E
- Part No.:
- HZ9A3LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9A3LTD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:8,800
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Product details
Overview
HZ9A3LTD-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 8.1–8.5 V at 0.5 mA test current, dynamic resistance of 60 Ω, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C. It is used in stabilized power supplies, reference voltage sources, and noise-sensitive instrumentation.
For engineers reviewing the HZ9A3LTD-E datasheet, HZ9A3LTD-E pinout, HZ9A3LTD-E application, or HZ9A3LTD-E equivalent, this device serves as a low-noise, low-leakage voltage reference with tight zener voltage tolerance and stable temperature coefficient - critical for high-accuracy DC biasing, sensor excitation, and analog front-end conditioning.
Technical Context
This Zener diode operates in reverse breakdown mode with DC-tested characteristics, delivering low noise (≈1/3–1/10 that of standard HZ series), low leakage current (≤1 μA at VR = 2.0 V), and low zener impedance (60 Ω at IZ = 0.5 mA). Its DO-35 glass package supports through-hole mounting and thermal dissipation up to 400 mW at 25°C ambient.
The device exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−3.2 mV/°C) near 8.3 V, enabling predictable drift behavior in temperature-varying environments. It is rated for storage between −55°C and +175°C and conforms to Renesas' Standard quality grade for industrial and office equipment applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.1–8.5 V at IZ = 0.5 mA - defines stable regulation point for low-drift reference design |
| Dynamic Resistance (rd) | 60 Ω at IZ = 0.5 mA - ensures minimal output impedance under load variation |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and heatsinking |
| Reverse Leakage (IR) | ≤1 μA at VR = 2.0 V - enables ultra-low quiescent current in battery-powered references |
| Junction Temperature (Tj) | 175°C max - allows operation in high-ambient industrial environments with appropriate thermal design |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - standard axial glass package with cathode band marking |
Pinout & Package
Package: DO-35 glass axial leaded package (Renesas code GRZZ0002ZB-A), orange body color, navy blue cathode band. Mass: 0.13 g (typ.). Dimensions: φD = 2.0 mm, E = 4.2 mm, L = 26.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher potential in reverse-biased configuration; determines polarity of regulated output |
| 2 (Anode) | Reference ground node | Serves as circuit common; must be held at lower potential than cathode for conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈1/3–1/10 of standard HZ series - improves SNR in precision ADC references and op-amp bias networks |
| Tight zener voltage tolerance | ±0.2 V window (8.1–8.5 V) at 0.5 mA - reduces calibration burden in factory-trimmed analog subsystems |
| Low dynamic impedance | 60 Ω at 0.5 mA - maintains regulation stability across ±10% load current shifts |
| High-temperature capability | 175°C max junction temperature - supports use in enclosed industrial enclosures without forced cooling |
| Standard quality grade | Qualified for computers, office equipment, communications, and industrial robots - no special qualification required for these applications |
Applications
| Instrumentation Reference | Stabilized Power Supply |
|---|---|
Use Scenario: Precision analog front-end in portable multimeters and data loggers requiring stable excitation voltage for resistive sensors. IC Role / Device Role / Timing Role: Zener diode provides low-drift, low-noise voltage reference for ADC reference buffer and sensor bias network. Use Value: 60 Ω dynamic resistance and <1 μA leakage minimize reference error and enable >16-bit effective resolution in battery-operated designs. |
Use Scenario: Post-regulation stage in linear power supplies for analog signal chains in audio amplifiers and test equipment. IC Role / Device Role / Timing Role: Shunt regulator establishes clean, quiet 8.3 V rail decoupled from switching noise of upstream converters. Use Value: Low noise and 400 mW power rating allow direct dissipation of up to 50 mA load current with <100 μVpp ripple contribution. |
| Industrial Sensor Interface | Calibration Equipment |
Use Scenario: Bridge sensor excitation in pressure transmitters operating across −40°C to +85°C ambient range. IC Role / Device Role / Timing Role: Zener diode supplies stable excitation voltage while compensating for thermal drift via known γZ ≈ −0.04 %/°C. Use Value: Predictable temperature coefficient enables first-order software compensation, reducing need for multi-point calibration. |
Use Scenario: Voltage reference module in handheld calibrators verifying 4–20 mA loop devices and process transmitters. IC Role / Device Role / Timing Role: Primary shunt reference establishing traceable 8.3 V output with long-term stability and low hysteresis. Use Value: Low leakage (<1 μA) and tight VZ tolerance ensure <±0.025% initial accuracy without trimming components. |
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 MMBZ5231BLT1G | Zener voltage 5.1 V, SOT-23 package, 225 mW Pd, rd = 17 Ω | Lower voltage, surface-mount only, unsuitable for 8.3 V reference needs | Select only if board space constraints require SMT and system allows 5.1 V reference redesign |
| Vishay BZX55C8V2 | Zener voltage 8.2 V ±5%, DO-35 package, 500 mW Pd, rd = 40 Ω, higher noise than HZ-L series | Same package and voltage range but lacks low-noise optimization and tighter VZ tolerance | Acceptable for cost-sensitive non-precision applications where noise <−60 dBc is not required |
Compared with MMBZ5231BLT1G and BZX55C8V2, the HZ9A3LTD-E delivers superior noise performance, tighter voltage tolerance, and guaranteed low-leakage behavior - making it the preferred choice for metrology-grade references where signal integrity dominates cost or footprint considerations.
Availability
HZ9A3LTD-E is available at Aetrix Electronics and suitable for stabilized power supply design, precision instrumentation reference, and industrial sensor interface applications requiring stable component supply, consistent parametric performance, and long-lifecycle availability.
Supply support for HZ9A3LTD-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 consumer markets.
The HZ-L Series Zener diodes were designed specifically for low-noise, high-stability voltage reference applications in precision analog systems - emphasizing reduced diode noise, tight VZ tolerance, and robust thermal performance.
FAQ
What is the zener voltage range of the HZ9A3LTD-E?
The HZ9A3LTD-E has a specified zener voltage range of 8.1 V to 8.5 V when tested at IZ = 0.5 mA and Ta = 25°C. This tight 0.4 V window supports high-accuracy voltage referencing without external trimming. The actual measured value for a given unit falls within this range and is verified during final test. HZ9A3LTD-E maintains this specification across its qualified operating temperature range.
Is the HZ9A3LTD-E RoHS compliant?
Yes, the HZ9A3LTD-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE) above threshold limits. Renesas confirms RoHS status for the HZ-L Series in official product change notices and material declarations.
What is the maximum power dissipation for HZ9A3LTD-E at 75°C ambient?
At 75°C ambient temperature, the HZ9A3LTD-E's maximum allowable power dissipation is approximately 280 mW, based on linear derating from 400 mW at 25°C using the published curve in REJ03G0182-0300 (Fig.3). This assumes free-air conditions on FR-4 PCB with standard DO-35 lead geometry. Derating must be applied before thermal design margin is exhausted.
Does the HZ9A3LTD-E have a specified zener impedance versus frequency?
No - the HZ9A3LTD-E datasheet specifies dynamic resistance (rd = 60 Ω) only at DC (IZ = 0.5 mA), per Note 1 on page 2. No AC impedance or frequency-dependent impedance data is provided. For high-frequency noise analysis, designers should rely on the documented low-noise characteristic (≈1/3–1/10 of HZ series) and treat rd as a small-signal approximation below 10 kHz.
Can the HZ9A3LTD-E replace the older HZ9A3L part?
Yes - the HZ9A3LTD-E is the updated designation for the same device formerly labeled HZ9A3L, reflecting Renesas' post-merger part numbering convention (NEC Electronics + Renesas Technology → Renesas Electronics). Electrical specifications, package, pinout, and reliability data are identical. The "TD-E" suffix denotes tape-and-reel packaging with embossed carrier tape per EIA-481-D, but the die and electrical behavior of HZ9A3LTD-E match HZ9A3L exactly.
HZ9A3LTD-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:
- -
HZ9A3LTD-E FAQ
1.How can I place an order for HZ9A3LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9A3LTD-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 HZ9A3LTD-E reliable?
The price and inventory of HZ9A3LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9A3LTD-E is usually 5 days.
3.What payment methods are accepted for HZ9A3LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9A3LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9A3LTD-E?
HZ9A3LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9A3LTD-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 HZ9A3LTD-E?
For technical support, including HZ9A3LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9A3LTD-E requirements.
6.How does Aetrix verify that HZ9A3LTD-E is sourced from the original manufacturer or authorized distributors?
All HZ9A3LTD-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 HZ9A3LTD-E meets industry standards.
7.What is the process for return or replacement of HZ9A3LTD-E?
All HZ9A3LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9A3LTD-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 HZ9A3LTD-E part is unused and in its original packaging.
Return procedure for HZ9A3LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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