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Renesas HZS9A2TD-E
- Part No.:
- HZS9A2TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS9A2TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,500
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Product details
Overview
HZS9A2TD-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 9.3 V to 9.7 V (Grade A2), 400 mW power dissipation, ≤20 Ω dynamic resistance at 5 mA, and operation up to 200°C junction temperature.
For engineers reviewing the HZS9A2TD-E datasheet, HZS9A2TD-E pinout, HZS9A2TD-E application, or HZS9A2TD-E equivalent, this device serves as a compact, high-stability voltage reference in analog front-ends, sensor biasing circuits, and overvoltage protection clamps where tight tolerance and low leakage are critical.
Technical Context
The HZS9A2TD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting reverse current above its specified zener breakdown threshold. Its low dynamic resistance (≤20 Ω) ensures minimal voltage deviation under dynamic load transients.
Designed for DC-stabilized operation, it exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−4 mV/°C) near 9.5 V, enabling predictable drift compensation in temperature-sensitive references. The device uses a silicon planar construction with gold-doped junction for controlled breakdown characteristics and long-term stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.3 V to 9.7 V at IZ = 5 mA - defines precise regulation point for feedback or reference circuits |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Dynamic Resistance (rd) | ≤20 Ω at IZ = 5 mA - ensures <±20 mV output shift per ±1 mA load change |
| Reverse Leakage Current (IR) | ≤5 µA at VR = 0.5 V - minimizes quiescent current in battery-powered bias networks |
| Junction Temperature (Tj) | −55°C to +200°C - enables use in industrial and automotive under-hood environments |
| Package Type | MHD (Mini-High-Density) - 5 mm pitch, axial-leaded, compatible with high-speed automatic insertion |
Pinout & Package
Package: MHD (axial-leaded, 2.0 mm diameter body, 26 mm lead length, 5 mm pitch). Cathode identified by lake-blue band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased terminal during normal regulation |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower-potential rail; completes shunt current path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | ≤20 Ω enables stable regulation under fast load transients in analog signal chains |
| Wide zener voltage range coverage | Part of HZS Series spanning 1.6 V–38 V - allows single-supplier sourcing across multiple voltage rails |
| High-temperature junction rating | 200°C max Tj supports deployment in thermally constrained enclosures without derating |
| Low leakage current | ≤5 µA at 0.5 V reverse bias reduces error in high-impedance reference dividers |
| Automated assembly compatibility | 5 mm pitch and MHD package enable direct use in high-throughput SMT-compatible through-hole lines |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller Reset Circuitry |
|---|---|
|
Use Scenario: Providing stable 9.5 V reference for bridge sensor excitation in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Shunt voltage reference establishing fixed bias voltage independent of supply ripple. Use Value: Maintains ±0.5% excitation accuracy over −40°C to +125°C ambient, reducing measurement drift. |
Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers in programmable logic controllers. IC Role / Device Role / Timing Role: Zener-clamped resistor divider sets precise Brown-Out Detection (BOD) trip point. Use Value: Enables deterministic reset assertion at 2.97 V with <10 µs response to supply sag. |
| DC-DC Converter Feedback Network | Overvoltage Protection Clamp |
|
Use Scenario: Precision voltage reference in isolated flyback converter secondary-side feedback loop. IC Role / Device Role / Timing Role: Sets regulated output voltage via optocoupler-driven error amplifier reference. Use Value: Delivers <±1% output regulation across line/load/transient conditions due to low rd. |
Use Scenario: Clamping transient surges on 12 V automotive accessory bus lines. IC Role / Device Role / Timing Role: Fast-acting shunt limiter diverting excess energy to ground during load dump events. Use Value: Limits peak voltage to ≤13.5 V with <100 ns turn-on, protecting downstream CAN transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A (ON Semiconductor) | 10 V nominal VZ, 1000 mW Pd, 17 Ω rd, DO-41 package | Higher power rating but larger footprint; less suitable for space-constrained PCBs | Preferred when higher surge energy handling is required and board area permits DO-41 |
| BZX55-C9V1 (Vishay) | 9.1 V nominal VZ, 500 mW Pd, 25 Ω rd, DO-35 package | Slightly lower VZ and higher rd; tighter tolerance not guaranteed at 5 mA | Acceptable where ±5% VZ tolerance suffices and legacy DO-35 tooling exists |
Compared with 1N4739A and BZX55-C9V1, the HZS9A2TD-E offers tighter VZ tolerance (±2.2%), lower rd, and MHD packaging optimized for automated insertion-making it preferable for high-volume, space-sensitive industrial control designs requiring repeatable 9.5 V regulation.
Availability
HZS9A2TD-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller reset circuits, and DC-DC converter feedback networks requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for HZS9A2TD-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 timing solutions for industrial, automotive, and infrastructure markets.
The HZS Series was developed specifically for high-reliability voltage stabilization in industrial power supplies and analog signal conditioning, emphasizing low noise, thermal stability, and automated assembly readiness.
FAQ
What is the exact zener voltage range for HZS9A2TD-E?
The HZS9A2TD-E has a guaranteed zener voltage range of 9.3 V to 9.7 V when tested at 5 mA zener current and 25°C ambient temperature. This Grade A2 tolerance (±2.2%) ensures predictable regulation in precision reference applications without requiring post-manufacturing sorting.
Does HZS9A2TD-E support high-temperature operation?
Yes, the HZS9A2TD-E is rated for junction temperatures up to +200°C and storage temperatures from −55°C to +175°C. Its silicon planar construction and gold-doped junction maintain stable zener characteristics across this full range, making it suitable for under-hood automotive or enclosed industrial environments.
What is the dynamic resistance specification for HZS9A2TD-E?
The dynamic resistance (rd) of HZS9A2TD-E is ≤20 Ω when measured at 5 mA zener current and 25°C. This low impedance ensures minimal output voltage variation (<±100 mV) under ±5 mA load current changes, critical for stable feedback and reference applications.
Is HZS9A2TD-E compatible with automated PCB assembly processes?
Yes, the HZS9A2TD-E uses the MHD package with 5 mm pitch and axial leads, explicitly designed for high-speed automatic insertion equipment. Its standardized dimensions and lake-blue cathode band enable reliable orientation detection and placement in volume manufacturing.
How does the temperature coefficient of HZS9A2TD-E affect system accuracy?
The HZS9A2TD-E exhibits a zener voltage temperature coefficient of approximately −0.04 %/°C (−4 mV/°C) near 9.5 V. Over a −40°C to +85°C ambient range, this results in ≤500 mV total drift - acceptable for non-critical references but requires compensation in metrology-grade designs.
HZS9A2TD-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:
- -
HZS9A2TD-E FAQ
1.How can I place an order for HZS9A2TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS9A2TD-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 HZS9A2TD-E reliable?
The price and inventory of HZS9A2TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS9A2TD-E is usually 5 days.
3.What payment methods are accepted for HZS9A2TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS9A2TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS9A2TD-E?
HZS9A2TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS9A2TD-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 HZS9A2TD-E?
For technical support, including HZS9A2TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS9A2TD-E requirements.
6.How does Aetrix verify that HZS9A2TD-E is sourced from the original manufacturer or authorized distributors?
All HZS9A2TD-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 HZS9A2TD-E meets industry standards.
7.What is the process for return or replacement of HZS9A2TD-E?
All HZS9A2TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS9A2TD-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 HZS9A2TD-E part is unused and in its original packaging.
Return procedure for HZS9A2TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS9A2TD-E Tags
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