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Renesas HZ9A1J-E
- Part No.:
- HZ9A1J-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9A1J-E.pdf
- Description:
- DIODE ZENER
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Inventory:8,500
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Product details
Overview
HZ9A1J-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 (min 7.7 V, max 8.1 V), 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 HZ9A1J-E datasheet, HZ9A1J-E pinout, HZ9A1J-E application, or HZ9A1J-E equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low noise performance (1/3–1/10 that of standard HZ series), DO-35 package compatibility, and thermal stability across −55°C to +175°C storage range.
Technical Context
The HZ9A1J-E operates as a two-terminal shunt regulator with DC-tested zener characteristics, designed for stable biasing and voltage reference functions in linear power stages and analog front-ends. Its low dynamic impedance (60 Ω) and tight VZ tolerance support high-accuracy regulation under low-current conditions (IZ = 0.5 mA).
It exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−3.2 mV/°C) near 8 V, confirmed by Figure 2 in REJ03G0182-0300 Rev.3.00, and maintains stable power derating up to 125°C ambient per Figure 3 - critical for compact PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.7 V min / 8.1 V max at IZ = 0.5 mA - defines precise regulation window for 8 V reference designs |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage shift under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports continuous operation in space-constrained SMT or through-hole layouts |
| Reverse Current (IR) | 1 μA max at VR = 2.0 V - guarantees low leakage in high-impedance reference nodes |
| Junction Temperature (Tj) | 175°C max - enables reliable operation in industrial environments with elevated ambient temperatures |
| Storage Temperature | −55°C to +175°C - compatible with reflow, wave soldering, and extended outdoor deployment |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A, Renesas SC-40 variant), glass axial leaded, orange body with navy blue cathode band, mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to positive rail; reverse-biased terminal where stable VZ appears relative to anode |
| 2 (Anode) | Reference ground node | Typically tied to circuit common; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ~1/3–1/10 that of standard HZ series - directly improves SNR in audio preamps and sensor signal chains |
| Tight zener voltage tolerance | ±0.2 V at 7.9 V nominal - reduces calibration overhead in 8 V reference designs |
| Low dynamic impedance | 60 Ω max at 0.5 mA - maintains regulation accuracy even with source impedance up to 60 Ω |
| High thermal robustness | 175°C max junction temperature - supports use in sealed enclosures or near heat-generating components |
Applications
| Instrumentation Reference | Low-Noise Audio Biasing |
|---|---|
Use Scenario: Precision voltage reference for 16-bit ADC front-end in portable data loggers. IC Role / Device Role / Timing Role: Provides stable 8 V reference to op-amp bias network and ADC reference input. Use Value: Low dynamic resistance (60 Ω) and ultra-low noise ensure <0.5 LSB reference drift over temperature and time. | Use Scenario: Cathode follower bias supply in discrete JFET microphone preamplifier. IC Role / Device Role / Timing Role: Sets gate bias point while minimizing added broadband noise in signal path. Use Value: Noise reduction vs. standard HZ series directly lowers system noise floor by ≥10 dB in 20 Hz–20 kHz band. |
| Industrial Sensor Excitation | Stabilized Power Supply Shunt |
Use Scenario: Excitation voltage source for strain gauge Wheatstone bridges in factory-floor load cells. IC Role / Device Role / Timing Role: Delivers regulated 8 V excitation independent of 12 V rail fluctuations. Use Value: ±0.2 V VZ tolerance and low tempco (−0.04 %/°C) limit bridge output error to <0.1% FS over −25°C to +70°C. | Use Scenario: Overvoltage clamp and ripple filter in 9 V linear regulator output stage. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient surges and smoothing residual AC ripple. Use Value: 400 mW power rating allows sustained clamping of 50 mA overloads without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | VZ = 5.6 V nominal, rd = 5 Ω, Pd = 1 W - higher power but different voltage grade | Not suitable for 8 V reference; requires redesign of resistor divider and thermal layout | Select only if 5.6 V regulation and higher surge capacity are required |
| BZX55-C8V2 | VZ = 8.2 V nominal (±5%), rd = 15 Ω, Pd = 500 mW - looser tolerance, lower rd, higher power | Acceptable for non-critical 8 V references but lacks HZ9A1J-E's low-noise advantage | Choose when cost sensitivity outweighs noise and tolerance requirements |
Compared with 1N4734A and BZX55-C8V2, the HZ9A1J-E delivers tighter voltage control (±0.2 V), industry-leading low-noise performance, and optimized thermal behavior for precision analog systems - making it irreplaceable where reference stability and spectral purity are design-critical.
Availability
HZ9A1J-E is available at Aetrix Electronics and suitable for stabilized power supply design, precision instrumentation reference generation, and low-noise analog biasing requiring stable component supply across automotive, industrial, and test equipment programs.
Supply support for HZ9A1J-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 Technology Corp. is a Japanese semiconductor manufacturer specializing in microcontrollers, analog mixed-signal ICs, and discrete power devices, with global R&D and manufacturing infrastructure.
The HZ-L Series was developed specifically for low-noise, high-stability voltage reference applications in measurement, audio, and sensor signal conditioning - emphasizing zener voltage precision, thermal predictability, and noise minimization over raw power handling.
FAQ
What is the exact zener voltage range specified for HZ9A1J-E?
The HZ9A1J-E has a guaranteed zener voltage range of 7.7 V minimum to 8.1 V maximum when tested at IZ = 0.5 mA and Ta = 25°C, as documented in Table on page 2 of REJ03G0182-0300 Rev.3.00. This ±0.2 V tolerance enables accurate 8 V reference design without post-production trimming. The HZ9A1J-E achieves this via tight process control in Renesas' silicon planar Zener fabrication.
Does HZ9A1J-E support high-temperature operation?
Yes, the HZ9A1J-E is rated for junction temperatures up to 175°C and storage temperatures from −55°C to +175°C. Its power dissipation derates linearly above 25°C ambient, maintaining 200 mW capability at 100°C per Figure 3. This makes the HZ9A1J-E suitable for under-hood automotive modules or enclosed industrial controllers where airflow is limited.
How does the noise performance of HZ9A1J-E compare to standard Zener diodes?
The HZ9A1J-E exhibits approximately 1/3 to 1/10 the noise level of conventional HZ-series Zeners, as stated in the Features section of REJ03G0182-0300. This is achieved through proprietary epitaxial layer optimization and low-leakage junction design. In practice, this translates to measurable SNR improvement in audio preamps and sensor interfaces where the HZ9A1J-E serves as a reference or bias source.
What is the package type and marking for HZ9A1J-E?
The HZ9A1J-E uses the DO-35 glass axial package (JEITA code GRZZ0002ZB-A, Renesas SC-40), with an orange body and navy blue cathode band. Pin 1 is cathode (marked end), Pin 2 is anode. The device weighs approximately 0.13 g and conforms to standard DO-35 mechanical dimensions including 2.0 mm diameter and 26.0 mm length.
Is HZ9A1J-E suitable for surface-mount assembly?
No, the HZ9A1J-E is a through-hole DO-35 axial package and is not designed for SMT reflow. It requires manual or wave soldering with lead spacing matching standard 0.4 inch (10.16 mm) PCB footprints. For SMT-compatible alternatives, engineers should consult Renesas' HZ-L Series SMD variants - the HZ9A1J-E itself must be mounted in axial holes with appropriate creepage clearance.
HZ9A1J-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:
- -
HZ9A1J-E FAQ
1.How can I place an order for HZ9A1J-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9A1J-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 HZ9A1J-E reliable?
The price and inventory of HZ9A1J-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9A1J-E is usually 5 days.
3.What payment methods are accepted for HZ9A1J-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9A1J-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9A1J-E?
HZ9A1J-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9A1J-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 HZ9A1J-E?
For technical support, including HZ9A1J-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9A1J-E requirements.
6.How does Aetrix verify that HZ9A1J-E is sourced from the original manufacturer or authorized distributors?
All HZ9A1J-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 HZ9A1J-E meets industry standards.
7.What is the process for return or replacement of HZ9A1J-E?
All HZ9A1J-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ9A1J-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 HZ9A1J-E part is unused and in its original packaging.
Return procedure for HZ9A1J-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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