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Renesas HZ9A1RE-E
- Part No.:
- HZ9A1RE-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9A1RE-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
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Inventory:16,000
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Product details
Overview
HZ9A1RE-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 V (typical), dynamic resistance of 60 Ω at 0.5 mA, 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 HZ9A1RE-E datasheet, HZ9A1RE-E pinout, HZ9A1RE-E application, or HZ9A1RE-E equivalent, key selection criteria include its low-noise performance (≈1/3–1/10 of standard HZ series), tight zener voltage tolerance (±0.2 V at 7.9 V), DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.
Technical Context
This device operates as a two-terminal voltage reference with DC-tested zener characteristics, specified at IZ = 0.5 mA and Ta = 25°C. Its low dynamic resistance (60 Ω) and low leakage current support stable regulation under light-load conditions typical in sensor biasing and op-amp reference networks.
The HZ9A1RE-E belongs to the HZ-L Series, distinguished by navy-blue cathode band marking and orange body color. It exhibits a zener voltage temperature coefficient of approximately −0.02 %/°C near 7.9 V, enabling predictable drift behavior in ambient-temperature-varying applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.7 V min to 8.1 V max at IZ = 0.5 mA - ensures precise 7.9 V nominal reference with ±0.2 V tolerance for stable analog circuit biasing. |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - minimizes output impedance variation, improving load regulation and noise rejection in reference paths. |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling. |
| Junction Temperature (Tj) | 175°C max - enables reliable operation in high-temperature industrial environments including motor control and automotive under-hood modules. |
| Reverse Current (IR) | 1 μA max at VR = 2.0 V - ensures minimal leakage in high-impedance reference nodes, preserving accuracy in battery-powered systems. |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - industry-standard axial leaded package with 2.0 mm diameter and 26 mm body length for through-hole mounting. |
Pinout & Package
Package: DO-35 glass axial-leaded package with navy-blue cathode band and orange body. Total mass ≈ 0.13 g. Dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 4.2 mm (nom).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side terminal for reverse-biased operation | Connected to regulated positive rail; polarity marking essential for correct orientation in series-shunt regulator topologies. |
| 2 (Anode) | Low-side terminal referenced to ground or common | Provides return path for zener current; must be tied to lowest potential node to maintain stable breakdown conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Noise level ≈1/3–1/10 that of standard HZ-series diodes - critical for audio preamps, ADC references, and precision sensor signal chains. |
| Tight zener voltage tolerance | ±0.2 V at 7.9 V nominal - reduces need for post-regulation trimming in factory-calibrated instruments. |
| Low dynamic impedance | 60 Ω max at 0.5 mA - maintains regulation accuracy across varying load currents in low-power analog subsystems. |
| High thermal endurance | Junction temperature rating of 175°C - supports deployment in thermally demanding industrial enclosures and power supply feedback loops. |
| Standardized DO-35 footprint | Compatible with legacy through-hole assembly processes and automated optical inspection (AOI) systems using JEITA GRZZ0002ZB-A package definition. |
Applications
| Instrumentation Reference | Low-Noise Audio Biasing |
|---|---|
Use Scenario: Precision voltage reference for 16-bit SAR ADC front-end and programmable gain amplifier (PGA) offset calibration. IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing stable 7.9 V bias point independent of supply ripple. Use Value: Enables <1 LSB integral nonlinearity error over temperature due to low dynamic resistance and predictable TC (−0.02 %/°C). |
Use Scenario: Cathode-biased gain stage in high-fidelity microphone preamplifier requiring ultra-low hum and hiss. IC Role / Device Role / Timing Role: Low-noise zener source for FET gate bias in discrete JFET input stages. Use Value: Reduces broadband noise floor by ≥10 dB compared to standard HZ-series diodes, preserving SNR in sub-10 μV input signals. |
| Industrial Sensor Excitation | Stabilized Power Supply Feedback |
Use Scenario: Constant-current excitation source for RTD and strain gauge Wheatstone bridges in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 7.9 V reference for current mirror biasing network. Use Value: Maintains excitation stability within ±0.05% over −40°C to +85°C ambient, meeting IEC 61000-4-2 immunity requirements. |
Use Scenario: Secondary-side voltage sensing element in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Zener clamp defining optocoupler LED drive threshold for primary-side regulation. Use Value: Ensures consistent regulation setpoint despite line/load transients, leveraging 400 mW power rating and 60 Ω rd for fast transient response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise zener 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, 200 mW Pd | Lower voltage, surface-mount only, higher dynamic resistance - suitable for space-constrained digital logic clamping but not precision analog referencing. | Select when board area is constrained and 5.1 V reference suffices; avoid where 7.9 V matching or low-noise analog performance is required. |
| Vishay BZX55C7V5 | Zener voltage 7.5 V (±5%), 100 Ω rd, DO-35 package, 500 mW Pd, no low-noise optimization | Wider VZ tolerance (±5% vs ±2.5%), higher noise, same package - acceptable for general-purpose regulation but not for metrology-grade references. | Choose for cost-sensitive industrial power rails where ±5% tolerance and higher noise are acceptable; not recommended for sensor or audio applications. |
Compared with MMBZ5231BLT1G and BZX55C7V5, the HZ9A1RE-E delivers tighter voltage tolerance (±2.5% vs ±5% or fixed 5.1 V), lower dynamic resistance (60 Ω vs 100 Ω), and verified low-noise performance - making it uniquely suited for precision analog reference design where spectral purity and thermal stability are critical.
Availability
HZ9A1RE-E is available at Aetrix Electronics and suitable for stabilized power supply design, precision instrumentation reference circuits, and low-noise audio biasing requiring stable component supply and long-term parametric consistency.
Supply support for HZ9A1RE-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 was developed specifically for low-noise voltage reference applications in high-precision analog systems, emphasizing reduced diode noise, tight zener voltage control, and robust thermal performance in standard DO-35 packaging.
FAQ
What is the nominal zener voltage of the HZ9A1RE-E and how tightly is it specified?
The HZ9A1RE-E has a nominal zener voltage of 7.9 V, with a guaranteed range of 7.7 V to 8.1 V at IZ = 0.5 mA and Ta = 25°C. This ±0.2 V tolerance (±2.5%) reflects Renesas' process control for the HZ-L Series and supports accurate voltage referencing without external trimming in applications like ADC biasing and sensor excitation circuits using the HZ9A1RE-E.
Does the HZ9A1RE-E meet low-noise requirements for audio applications?
Yes - the HZ9A1RE-E is explicitly characterized for low-noise operation, with noise levels approximately 1/3 to 1/10 that of the standard HZ series. This performance is validated in Renesas' REJ03G0182-0300 datasheet and makes the HZ9A1RE-E suitable for cathode biasing in JFET-input audio preamplifiers and other noise-critical analog signal paths where the HZ9A1RE-E replaces generic zeners.
What is the maximum power dissipation and thermal limit for the HZ9A1RE-E?
The HZ9A1RE-E has a maximum power dissipation of 400 mW at Ta = 25°C and a maximum junction temperature of 175°C. Derating curves in the datasheet show usable power down to zero at ~150°C ambient, confirming suitability for high-temperature industrial use cases such as motor drive feedback networks and the HZ9A1RE-E's role in thermally demanding PCB locations.
Is the HZ9A1RE-E compatible with standard DO-35 footprint and assembly processes?
Yes - the HZ9A1RE-E uses the JEITA-standard DO-35 package (GRZZ0002ZB-A), with 2.0 mm body diameter, 26 mm length, and axial leads. Its navy-blue cathode band and orange body match industry visual identification conventions, ensuring compatibility with existing through-hole placement equipment, wave soldering profiles, and AOI systems configured for the DO-35 footprint used by the HZ9A1RE-E.
How does the dynamic resistance of the HZ9A1RE-E affect regulation stability?
The HZ9A1RE-E specifies a maximum dynamic resistance of 60 Ω at IZ = 0.5 mA. This low rd value minimizes output voltage variation under changing load current, directly improving line and load regulation in shunt reference configurations. In practice, this enables the HZ9A1RE-E to maintain stable bias points in op-amp reference networks and sensor bridge excitations where even small impedance-induced errors degrade measurement fidelity.
HZ9A1RE-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:
- -
HZ9A1RE-E FAQ
1.How can I place an order for HZ9A1RE-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9A1RE-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 HZ9A1RE-E reliable?
The price and inventory of HZ9A1RE-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9A1RE-E is usually 5 days.
3.What payment methods are accepted for HZ9A1RE-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9A1RE-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9A1RE-E?
HZ9A1RE-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9A1RE-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 HZ9A1RE-E?
For technical support, including HZ9A1RE-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9A1RE-E requirements.
6.How does Aetrix verify that HZ9A1RE-E is sourced from the original manufacturer or authorized distributors?
All HZ9A1RE-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 HZ9A1RE-E meets industry standards.
7.What is the process for return or replacement of HZ9A1RE-E?
All HZ9A1RE-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9A1RE-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 HZ9A1RE-E part is unused and in its original packaging.
Return procedure for HZ9A1RE-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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