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Renesas HZS9B2TD-E
- Part No.:
- HZS9B2TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS9B2TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS9B2TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 9.5 V (min) to 9.9 V (max), dynamic resistance of 5.0 Ω at 5 mA test current, and maximum power dissipation of 400 mW in the MHD package.
For engineers reviewing the HZS9B2TD-E datasheet, HZS9B2TD-E pinout, HZS9B2TD-E application, or HZS9B2TD-E equivalent, this device serves as a low-leakage, low-impedance voltage reference in analog sensing front-ends, LDO pre-regulation stages, and microcontroller reset circuitry where tight tolerance and thermal stability are required.
Technical Context
The HZS9B2TD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting reverse-biased zener breakdown. Its 5.0 Ω dynamic resistance ensures minimal voltage deviation under ±1 mA load transients at 5 mA bias.
Rated for junction temperatures up to 200°C and storage from −55°C to +175°C, it supports industrial ambient operation without derating below 70°C. The −0.05 %/°C temperature coefficient (typ.) near 9.7 V enables predictable drift compensation in temperature-sensitive references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5 V min to 9.9 V max at IZ = 5 mA - defines regulation band for precision reference design |
| Dynamic Resistance (rd) | 5.0 Ω max at IZ = 5 mA - ensures ≤5 mV output shift per 1 mA load change |
| Reverse Current (IR) | ≤1 µA max at VR = 7.5 V - guarantees low standby power loss in battery-backed circuits |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets absolute upper limit for continuous DC bias |
| Junction Temperature (Tj) | 200°C max - allows operation in high-temperature industrial enclosures without heatsinking |
| Temperature Coefficient (γZ) | −0.05 %/°C typ. at ~9.7 V - enables predictable drift modeling for calibration compensation |
Pinout & Package
Package: MHD (JEITA code GRZZ0002ZC-A), axial leaded, 2.0 mm diameter × 26.0 mm length, paper phenol body, cathode band marked in lake blue.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased during operation |
| 2 (Anode) | Reference ground return | Typically tied to system ground or negative rail; completes zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 5.0 Ω max enables stable regulation under fast load transients in sensor bias networks |
| Wide zener voltage range coverage | Part of HZS Series spanning 1.6–38 V - allows single-supplier sourcing across multiple voltage rails |
| High-temperature junction rating | 200°C max Tj supports use in automotive engine control modules and industrial motor drives |
| Low leakage current | ≤1 µA at 7.5 V ensures <1 µW standby loss - critical for energy-harvesting and IoT edge nodes |
| 5 mm-pitch compatible leads | Optimized for high-speed automatic insertion in PCB assembly lines - reduces SMT conversion cost |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 9.7 V bias to Wheatstone bridge, rejecting supply ripple. Use Value: 5.0 Ω rd limits bridge voltage shift to <5 mV during 1 mA load variation - preserving 12-bit ADC accuracy. |
Use Scenario: Generating clean, temperature-stable reset threshold for ARM Cortex-M0+ MCUs in smart meters. IC Role / Device Role / Timing Role: Zener-clamped reference input to dedicated reset IC (e.g., TPS3808), defining precise 9.5 V brown-out point. Use Value: −0.05 %/°C γZ ensures reset threshold drift remains within ±150 mV over −40°C to +85°C operating range. |
| LDO Pre-regulator Reference | Analog Front-End Calibration Reference |
Use Scenario: Setting reference voltage for adjustable LDOs powering RF transceivers in wireless gateways. IC Role / Device Role / Timing Role: Precision shunt reference feeding feedback divider of LM317-type regulator to generate stable 8.5 V intermediate rail. Use Value: 400 mW Pd allows 5 mA bias current with 100 mW margin - sustaining regulation under worst-case line/load conditions. |
Use Scenario: Providing traceable voltage standard for on-board DAC calibration in medical diagnostic equipment. IC Role / Device Role / Timing Role: Low-drift zener source for 16-bit DAC offset trimming via microcontroller-controlled current sink. Use Value: ≤1 µA IR prevents loading error in high-impedance calibration paths - maintaining <0.001% full-scale uncertainty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C9V1 (Diodes Inc.) | 9.1 V nominal, 15 Ω rd, SOT-23 package, 300 mW Pd | SMT-only; higher impedance limits transient response in fast-switching regulators | Preferred for space-constrained PCBs where 0.4 V lower VZ and SMT assembly are acceptable |
| 1N4739A (ON Semiconductor) | 9.1 V nominal, 8 Ω rd, DO-41 package, 1 W Pd | Higher power rating but larger footprint; ±5% VZ tolerance vs. HZS9B2TD-E's ±2.2% | Chosen when higher surge capability is needed and tighter voltage tolerance is not required |
Compared with BZX84-C9V1 and 1N4739A, the HZS9B2TD-E delivers superior voltage precision (±2.2%), lower dynamic impedance (5.0 Ω), and optimized thermal stability (−0.05 %/°C) in a compact axial package - making it ideal for industrial-grade analog references where long-term drift and load regulation are critical.
Availability
HZS9B2TD-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller reset circuits, LDO pre-regulator references, and analog front-end calibration requiring stable component supply with guaranteed long-term continuity.
Supply support for HZS9B2TD-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, and connectivity solutions for industrial, automotive, and enterprise systems.
The HZS Series was developed as a family of precision silicon planar Zener diodes targeting stable voltage reference needs in industrial power supplies, instrumentation, and embedded control - emphasizing low leakage, tight VZ tolerance, and high-temperature reliability.
FAQ
What is the exact zener voltage range specified for HZS9B2TD-E?
The HZS9B2TD-E has a guaranteed zener voltage range of 9.5 V minimum to 9.9 V maximum when tested at IZ = 5 mA and Ta = 25°C. This ±2.2% tolerance reflects Grade B2 within the HZS9 family and is confirmed in Renesas document REJ03G0184-0500 Rev.5.00. The HZS9B2TD-E must be operated within this band to meet its specified dynamic resistance and temperature coefficient performance.
Does HZS9B2TD-E support automatic insertion during PCB assembly?
Yes, the HZS9B2TD-E uses the MHD package with 5 mm lead pitch, explicitly designed for high-speed automatic insertion as stated in the "Ordering Information" section of the Renesas datasheet. Its axial lead configuration and standardized dimensions (2.0 mm diameter, 26.0 mm length) ensure compatibility with industry-standard pick-and-place and wave-soldering equipment - eliminating need for manual placement or SMT adapters.
What is the maximum allowable reverse current for HZS9B2TD-E before regulation degrades?
The HZS9B2TD-E specifies a maximum reverse current (IR) of 1 µA at VR = 7.5 V, measured at Ta = 25°C. Exceeding this voltage or current risks entering non-regulating regions or accelerating long-term parameter drift. For reliable operation, bias current must remain ≥5 mA (per VZ test condition), and applied reverse voltage should stay within the 9.5–9.9 V band defined for the HZS9B2TD-E.
How does the temperature coefficient of HZS9B2TD-E impact its use in outdoor industrial equipment?
The HZS9B2TD-E exhibits a typical temperature coefficient (γZ) of −0.05 %/°C near its 9.7 V nominal point, meaning its zener voltage decreases by ~4.85 mV per °C rise. Over a −40°C to +85°C range, total drift is approximately ±640 mV - a known, linear behavior that can be compensated in firmware or trimmed during calibration. This predictability makes the HZS9B2TD-E suitable for outdoor-rated equipment where passive compensation suffices.
Can HZS9B2TD-E replace older NEC-brand zener diodes in legacy designs?
Yes, the HZS9B2TD-E is a direct continuation of the original NEC HZS series, as confirmed by Renesas' April 2010 merger notice stating full business continuity and document validity. Pinout, electrical specs, and packaging match prior NEC-labeled HZS9B2 variants. No layout or schematic changes are required when migrating from NEC-branded equivalents, and the HZS9B2TD-E maintains identical quality grade ("Standard") and environmental compliance (RoHS-compliant, Pb-free).
HZS9B2TD-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:
- -
HZS9B2TD-E FAQ
1.How can I place an order for HZS9B2TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS9B2TD-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 HZS9B2TD-E reliable?
The price and inventory of HZS9B2TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS9B2TD-E is usually 5 days.
3.What payment methods are accepted for HZS9B2TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS9B2TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS9B2TD-E?
HZS9B2TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS9B2TD-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 HZS9B2TD-E?
For technical support, including HZS9B2TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS9B2TD-E requirements.
6.How does Aetrix verify that HZS9B2TD-E is sourced from the original manufacturer or authorized distributors?
All HZS9B2TD-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 HZS9B2TD-E meets industry standards.
7.What is the process for return or replacement of HZS9B2TD-E?
All HZS9B2TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS9B2TD-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 HZS9B2TD-E part is unused and in its original packaging.
Return procedure for HZS9B2TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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