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Renesas HZ9HB2TA
- Part No.:
- HZ9HB2TA
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ9HB2TA.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZ9HB2TA from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 8.7 V (min 8.5 V, max 8.9 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 and reference circuits where noise suppression and thermal stability are critical.
For engineers reviewing the HZ9HB2TA datasheet, HZ9HB2TA pinout, HZ9HB2TA application, or HZ9HB2TA equivalent, key selection criteria include its low-noise performance (≈1/3–1/10 lower than standard HZ series), DO-35 package compatibility, zener voltage tolerance (±0.2 V), and temperature coefficient behavior across 8.5–8.9 V range.
Technical Context
This device operates as a two-terminal voltage reference with reverse-biased junction conduction, designed for DC-stabilized operation per test conditions in the official datasheet. Its low dynamic impedance (60 Ω) and tight zener voltage tolerance support stable regulation under varying load currents up to 0.5 mA.
The HZ9HB2TA exhibits a negative temperature coefficient in the 8.5–8.9 V range, with typical γZ ≈ −0.04 %/°C (−4 mV/°C), enabling predictable drift compensation in temperature-sensitive references. It is rated for continuous operation at ambient temperatures up to 125°C with derated power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.5 V min / 8.9 V max at IZ = 0.5 mA - defines precise regulation band for low-drift reference design |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports compact PCB layout without forced cooling |
| Junction Temperature (Tj) | 175°C max - enables reliable operation in high-temperature industrial environments |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - minimizes standby current in battery-powered references |
| Package | DO-35 (JEITA GRZZ0002ZB-A) - industry-standard axial leaded package with orange body and navy-blue cathode band |
Pinout & Package
DO-35 glass axial package with 2 terminals: cathode (marked by navy-blue band) and anode. Body color is orange. Total mass ≈ 0.13 g. Dimensions: φD = 2.0 mm (max), L = 26.0 mm (min), E = 4.2 mm (min).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to regulated output node; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Reference ground terminal | Tied to circuit common; establishes reference potential for zener breakdown voltage |
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 |
| Stable low-impedance regulation | rd = 60 Ω at 0.5 mA - reduces output ripple sensitivity to current fluctuations |
| Wide zener voltage tolerance control | ±0.2 V over 8.5–8.9 V range - enables binning for matched reference pairs in differential systems |
| High thermal endurance | Tj = 175°C - allows use in enclosed enclosures or near heat-generating components without derating |
Applications
| Instrumentation Reference | Industrial Power Monitor |
|---|---|
Use Scenario: Precision voltage reference in 16-bit analog front-end of portable multimeter. IC Role / Device Role / Timing Role: Zener diode providing stable 8.7 V reference for ADC voltage scaling and offset calibration. Use Value: Low noise and tight VZ tolerance ensure <±0.05% full-scale accuracy over temperature. | Use Scenario: Secondary-side voltage sensing in isolated 24 V DC power supply for PLC I/O modules. IC Role / Device Role / Timing Role: Zener clamping element stabilizing feedback divider node against transient overvoltage. Use Value: 400 mW Pd and 60 Ω rd maintain regulation during 100 ms load surges without thermal runaway. |
| Audio Signal Conditioning | Medical Sensor Biasing |
Use Scenario: DC bias reference for low-noise op-amp stages in studio-grade microphone preamplifier. IC Role / Device Role / Timing Role: Low-noise zener supplying clean 8.7 V rail to FET-input amplifier stage. Use Value: Noise reduction vs. standard HZ series directly lowers audible hiss floor by >10 dB(A). | Use Scenario: Stable excitation voltage source for bridge-based strain gauge in patient-worn vital sign monitor. IC Role / Device Role / Timing Role: Precision zener regulating bridge excitation to minimize thermal drift-induced measurement error. Use Value: −0.04 %/°C tempco and 0.2 V VZ tolerance limit gain drift to <0.1% over 0–50°C operating range. |
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 |
|---|---|---|---|
| 1N4737A | Zener voltage 8.2 V ±5%, rd = 7 Ω, Pd = 1 W, DO-41 package | Higher power and lower impedance but higher noise and looser VZ tolerance | Select when higher current drive (>10 mA) and lower rd outweigh noise and precision requirements |
| BZX55-C8V2 | Zener voltage 8.2 V ±5%, rd = 25 Ω, Pd = 500 mW, DO-35 package | Same package, but higher noise and wider VZ spread; no low-noise specification | Choose only if cost sensitivity overrides need for low-noise performance and tight VZ binning |
Compared with 1N4737A and BZX55-C8V2, the HZ9HB2TA delivers superior noise performance and tighter zener voltage control in the same DO-35 footprint, making it optimal for precision analog signal chains where reference integrity directly impacts system-level accuracy.
Availability
HZ9HB2TA is available at Aetrix Electronics and suitable for stabilized power supplies, precision instrumentation references, industrial sensor biasing, and low-noise audio signal conditioning requiring stable component supply and long-term sourcing continuity.
Supply support for HZ9HB2TA 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 power devices, and precision analog components for industrial, automotive, and infrastructure applications.
The HZ-L Series Zener diodes were developed specifically for low-noise, high-stability voltage reference applications in test equipment, medical sensors, and high-fidelity audio systems where conventional Zeners introduce unacceptable signal degradation.
FAQ
What is the exact zener voltage range specified for HZ9HB2TA?
The HZ9HB2TA has a guaranteed zener voltage range of 8.5 V minimum to 8.9 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.4 V span reflects tight binning within the HZ9B2L subgroup and supports precision reference designs requiring predictable regulation thresholds without post-calibration trimming.
Is HZ9HB2TA compatible with standard DO-35 footprint layouts?
Yes, HZ9HB2TA uses the JEITA-standard DO-35 package (Renesas code GRZZ0002ZB-A) with identical mechanical dimensions and lead spacing as generic DO-35 Zener diodes. Its orange body and navy-blue cathode band follow industry conventions, ensuring drop-in replacement capability in existing DO-35 footprints without PCB modification.
How does the noise performance of HZ9HB2TA compare to standard Zener diodes?
HZ9HB2TA achieves approximately 1/3 to 1/10 the noise level of standard HZ-series Zeners due to optimized silicon planar structure and process control. This low-noise characteristic is explicitly documented in the Renesas datasheet and directly benefits high-resolution data acquisition systems where reference noise couples into analog signal paths.
What is the maximum reverse leakage current for HZ9HB2TA?
The maximum reverse leakage current (IR) for HZ9HB2TA is 1 μA at VR = 2.0 V and Ta = 25°C. This low leakage supports energy-efficient operation in battery-powered instrumentation and ensures minimal loading on high-impedance reference nodes in precision analog circuits.
Can HZ9HB2TA be used in surface-mount designs?
No, HZ9HB2TA is exclusively available in the through-hole DO-35 axial package and is not offered in surface-mount variants. For SMT-compatible alternatives with similar electrical characteristics, engineers should evaluate Renesas' HZ-L Series SMD equivalents such as the HZ9HB2TL in SOD-123 or consult Renesas' latest portfolio documentation.
HZ9HB2TA 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:
- -
HZ9HB2TA FAQ
1.How can I place an order for HZ9HB2TA through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ9HB2TA 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 HZ9HB2TA reliable?
The price and inventory of HZ9HB2TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ9HB2TA is usually 5 days.
3.What payment methods are accepted for HZ9HB2TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ9HB2TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ9HB2TA?
HZ9HB2TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ9HB2TA 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 HZ9HB2TA?
For technical support, including HZ9HB2TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ9HB2TA requirements.
6.How does Aetrix verify that HZ9HB2TA is sourced from the original manufacturer or authorized distributors?
All HZ9HB2TA 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 HZ9HB2TA meets industry standards.
7.What is the process for return or replacement of HZ9HB2TA?
All HZ9HB2TA units undergo pre-shipment inspection (PSI). If there is an issue with HZ9HB2TA, 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 HZ9HB2TA part is unused and in its original packaging.
Return procedure for HZ9HB2TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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