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Renesas HZ9HA2-E
- Part No.:
- HZ9HA2-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9HA2-E.pdf
- Description:
- DIODE ZENER FOR STABIL POWER
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
HZ9HA2-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 7.9–8.3 V, 400 mW power dissipation, 6.0 Ω dynamic impedance at 0.5 mA test current, and DO-35 glass package with orange body and navy blue cathode band. It serves as a stable reference in low-drift power supply feedback paths and sensor biasing networks.
For engineers reviewing the HZ9HA2-E datasheet, HZ9HA2-E pinout, HZ9HA2-E application, or HZ9HA2-E equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low noise performance relative to standard HZ series, temperature coefficient behavior near 8 V, and compatibility with through-hole PCB assembly using DO-35 footprint.
Technical Context
The HZ9HA2-E operates as a two-terminal voltage reference device with DC-tested zener breakdown characteristics, designed for stable operation at 0.5 mA nominal test current and rated up to 1 mA reverse current. Its low dynamic resistance (6.0 Ω) and reduced noise level-approximately 1/3 to 1/10 that of legacy HZ-series diodes-support high-fidelity signal conditioning in sensitive analog front-ends.
Thermal design is constrained by a 175°C maximum junction temperature and derated power dissipation above 25°C ambient, per the published curve in Figure 3. The device exhibits a negative temperature coefficient in the 8 V range, consistent with silicon zener physics, and is not intended for transient suppression or surge clamping applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.9–8.3 V at IZ = 0.5 mA - defines stable regulation point for feedback networks requiring tight DC reference accuracy |
| Dynamic Resistance (rd) | 6.0 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load current changes |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Junction Temperature (Tj) | −55 to +175°C - supports operation in industrial environments with wide ambient swings |
| Reverse Current (IR) | 1 μA max at VR = 2.0 V - confirms low leakage for high-impedance biasing applications |
| Noise Level | ≈1/3–1/10 of HZ-series - directly improves SNR in low-level analog measurement circuits |
Pinout & Package
Package: DO-35 glass axial package (JEITA code GRZZ0002ZB-A), orange body with navy blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated positive rail; reverse-biased during normal operation |
| 2 (Anode) | Reference ground terminal | Typically tied to circuit common; establishes reference potential for voltage sensing |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener structure | Reduces broadband voltage noise by factor of 3–10 vs. standard HZ series, critical for audio preamps and precision ADC references |
| Stable low-impedance regulation | 6.0 Ω dynamic resistance enables <1 mV output shift per 1 mA load change in feedback loops |
| Wide zener voltage range support | Part of HZ-L family spanning 5.2–38 V, allowing single-supplier sourcing across multiple reference voltages |
| DO-35 mechanical reliability | Hermetically sealed glass package ensures long-term parameter stability and moisture resistance in harsh environments |
Applications
| High-Precision Voltage Reference | Low-Noise Sensor Biasing |
|---|---|
Use Scenario: Providing stable excitation voltage for strain gauge bridges in industrial weighing systems where microvolt-level drift must be minimized. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference establishing fixed bias point for Wheatstone bridge operation. Use Value: Low dynamic impedance (6.0 Ω) and ultra-low noise suppress thermal and shot noise contributions, improving bridge output SNR by >10 dB. | Use Scenario: Supplying clean bias current to photodiode anodes in optical smoke detectors requiring stable responsivity over temperature. IC Role / Device Role / Timing Role: Reverse-biased zener operating in constant-current mode to generate low-noise bias voltage for photodiode cathode. Use Value: 1 μA max leakage at 2.0 V ensures negligible error current injection into high-impedance photodiode node. |
| Regulated Feedback Node | Analog Front-End Reference |
Use Scenario: Setting output voltage in linear regulator feedback divider for medical-grade patient monitoring equipment. IC Role / Device Role / Timing Role: Precision shunt reference replacing TL431 in low-power LDO feedback path. Use Value: Tight 7.9–8.3 V tolerance and −0.06%/°C tempco enable ±0.5% output regulation over −40 to +85°C. | Use Scenario: Generating reference voltage for 16-bit SAR ADC input scaling in portable test instrumentation. IC Role / Device Role / Timing Role: DC voltage reference source for ratiometric ADC gain calibration and offset nulling. Use Value: Low 6.0 Ω impedance prevents reference droop during ADC sampling transients, preserving LSB accuracy. |
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, SOD-123 package, 200 mW rating, 17 Ω dynamic resistance | Lower voltage, surface-mount only, higher impedance limits use in high-accuracy feedback | Select when board space is constrained and 5.1 V reference suffices; not suitable for HZ9HA2-E's 8 V requirement or noise-sensitive roles |
| Vishay BZX84-C8V2 | Zener voltage 8.2 V, SOT-23 package, 300 mW rating, 15 Ω dynamic resistance, higher noise than HZ-L series | SMT-compatible but lacks documented low-noise optimization and has looser voltage tolerance (±5%) | Acceptable for cost-sensitive consumer applications where 8.2 V nominal and moderate noise are acceptable |
Compared with MMBZ5231BLT1G and BZX84-C8V2, the HZ9HA2-E delivers superior noise performance, tighter voltage tolerance, and higher power handling in a through-hole package-making it preferred for industrial and medical analog designs demanding long-term stability and low drift.
Availability
HZ9HA2-E is available at Aetrix Electronics and suitable for precision voltage reference, low-noise sensor biasing, and regulated feedback node applications requiring stable component supply across extended product lifecycles.
Supply support for HZ9HA2-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 is a global semiconductor manufacturer specializing in microcontrollers, analog, and power devices for automotive, industrial, and infrastructure markets.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in precision analog systems-addressing limitations of earlier HZ-series diodes in SNR-critical signal chains.
FAQ
What is the exact zener voltage range specified for HZ9HA2-E?
The HZ9HA2-E is specified with a zener voltage range of 7.9 V minimum to 8.3 V maximum, measured at a test current of 0.5 mA and ambient temperature of 25°C. This 0.4 V tolerance reflects tight process control for precision reference use, and the value is confirmed in the Electrical Characteristics table on page 2 of the REJ03G0182-0300 datasheet. The HZ9HA2-E does not support adjustable or programmable voltage settings.
Is HZ9HA2-E suitable for surface-mount assembly?
No, the HZ9HA2-E uses a DO-35 axial glass package with 26 mm lead length and 2.0 mm body diameter, designed exclusively for through-hole mounting. It is incompatible with reflow or wave soldering processes used for SMT components. For surface-mount alternatives, consider Vishay BZX84-C8V2 (SOT-23) or ON Semiconductor MMBZ5231BLT1G (SOD-123), though neither matches the HZ9HA2-E's low-noise performance or voltage tolerance.
What is the maximum reverse current rating for HZ9HA2-E?
The HZ9HA2-E has a maximum reverse current (IR) of 1 μA at a reverse voltage (VR) of 2.0 V, per the Electrical Characteristics table. This low leakage supports high-impedance bias networks and minimizes error current in precision applications. At its rated zener voltage, the device conducts controlled reverse current-typically 0.5 mA for characterization-but is not rated for sustained operation beyond its 400 mW power limit.
Does HZ9HA2-E have a specified temperature coefficient?
Yes, the HZ9HA2-E exhibits a negative temperature coefficient typical of ~−0.06%/°C in the 8 V range, as shown in Figure 2 of the datasheet. This value is derived from the HZ-L series' general behavior and aligns with silicon zener physics for voltages below 5.6 V; however, the exact coefficient for HZ9HA2-E is not individually tabulated. Designers should consult the published γZ vs. VZ curve for interpolation.
Can HZ9HA2-E replace standard HZ-series Zener diodes directly?
The HZ9HA2-E is a drop-in replacement for HZ9A2L in DO-35 package applications, sharing identical pinout, package dimensions, and thermal ratings. However, it delivers significantly lower noise (≈1/3–1/10 of HZ-series) and improved dynamic impedance (6.0 Ω vs. 80 Ω for HZ9A2L), making it preferable where signal integrity is critical. No PCB changes are required, but system-level noise testing is recommended after substitution.
HZ9HA2-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:
- -
HZ9HA2-E FAQ
1.How can I place an order for HZ9HA2-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9HA2-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 HZ9HA2-E reliable?
The price and inventory of HZ9HA2-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9HA2-E is usually 5 days.
3.What payment methods are accepted for HZ9HA2-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9HA2-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9HA2-E?
HZ9HA2-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9HA2-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 HZ9HA2-E?
For technical support, including HZ9HA2-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9HA2-E requirements.
6.How does Aetrix verify that HZ9HA2-E is sourced from the original manufacturer or authorized distributors?
All HZ9HA2-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 HZ9HA2-E meets industry standards.
7.What is the process for return or replacement of HZ9HA2-E?
All HZ9HA2-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9HA2-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 HZ9HA2-E part is unused and in its original packaging.
Return procedure for HZ9HA2-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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