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Renesas HZS9A1LTD-E
- Part No.:
- HZS9A1LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS9A1LTD-E.pdf
- Description:
- DIODE ZENER
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Inventory:12,500
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Product details
Overview
HZS9A1LTD-E from Renesas Electronics is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog and stabilized power supply circuits, with a nominal zener voltage of 7.7–8.1 V, maximum power dissipation of 400 mW, dynamic resistance of 60 Ω at 6.0 mA, and reverse leakage current ≤1 μA at 5.0 V - deployed in industrial instrumentation and sensor signal conditioning.
For engineers reviewing the HZS9A1LTD-E datasheet, HZS9A1LTD-E pinout, HZS9A1LTD-E application, or HZS9A1LTD-E equivalent, this part serves as a low-noise, low-impedance voltage reference where thermal stability, minimal noise contribution, and consistent zener knee behavior under low-current bias are critical selection criteria.
Technical Context
The HZS9A1LTD-E employs a planar diffusion process to achieve tight zener voltage tolerance (±0.2 V), low dynamic impedance (60 Ω), and reduced diode noise - approximately 1/3–1/10 that of the legacy HZ series - enabling stable reference performance in low-power, high-PSRR analog front-ends. Its junction temperature rating of 200°C supports operation in thermally demanding environments.
Designed for DC-biased regulation, it specifies zener voltage tested with DC current (IZ = 0.5 mA), reverse current measured at VR = 5.0 V, and dynamic resistance evaluated at IZ = 6.0 mA - all defined at Ta = 25°C per REJ03G0166-0300 Rev.3.00. The device exhibits a negative temperature coefficient near 0 mV/°C for VZ ≈ 7.9 V, minimizing drift across ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.7–8.1 V at IZ = 0.5 mA - defines precise DC reference point for feedback loops and analog calibration. |
| Dynamic Resistance (rd) | 60 Ω at IZ = 6.0 mA - ensures minimal output impedance and high ripple rejection in shunt regulator topologies. |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact PCB layouts without forced cooling. |
| Reverse Leakage (IR) | ≤1 μA at VR = 5.0 V - guarantees negligible error current in high-impedance reference nodes. |
| Junction Temperature (Tj) | 200°C - enables reliable operation in industrial enclosures with elevated ambient temperatures. |
| Noise Level | ≈1/3–1/10 of HZ-series diodes - directly reduces broadband noise coupling into sensitive ADC references or op-amp bias networks. |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial-leaded, 5 mm pitch, 2.0 mm diameter body, 26 mm lead length - optimized for high-speed automatic insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference node | Connected to regulated output or feedback network; polarity must be observed to maintain reverse-bias operation. |
| 2 (Anode) | Current return path | Typically tied to ground or common rail; establishes reference potential for cathode-side voltage sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener structure | Reduces RMS noise floor by up to 10× vs. standard HZ diodes - critical for 16-bit+ data acquisition systems. |
| Tight zener voltage tolerance | ±0.2 V band (7.7–8.1 V) enables accurate factory calibration without post-trim adjustments. |
| Low dynamic impedance | 60 Ω at 6 mA ensures <1 mV/mA load regulation error - maintains reference stability under varying sink currents. |
| High thermal endurance | 200°C max junction temperature allows use in sealed industrial housings with limited airflow. |
| Automated assembly compatibility | 5 mm pitch and standardized MHD dimensions support high-throughput pick-and-place and wave soldering. |
Applications
| Industrial Sensor Signal Conditioning | Precision ADC Reference Supply |
|---|---|
Use Scenario: Amplifying and digitizing low-level thermocouple or strain gauge outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode provides stable 7.9 V reference for op-amp gain stages and ADC voltage reference buffers. Use Value: Low 60 Ω dynamic resistance minimizes reference droop during multiplexed channel switching transients. |
Use Scenario: Supplying clean, low-drift reference voltage to 16-bit SAR ADCs in test equipment front-ends. IC Role / Device Role / Timing Role: Shunt-connected zener establishes fixed reference potential independent of supply rail variation. Use Value: 1/10 noise level vs. legacy HZ diodes preserves effective number of bits (ENOB) in high-resolution conversion. |
| Stabilized Power Supply Feedback | Analog Front-End Biasing |
Use Scenario: Secondary-side voltage sensing in isolated DC-DC converters for telecom power bricks. IC Role / Device Role / Timing Role: Zener sets error amplifier reference threshold in TL431-like shunt regulator configurations. Use Value: Tight 7.7–8.1 V tolerance ensures ±0.5% output regulation accuracy without external trimming. |
Use Scenario: Generating stable bias voltages for rail-to-rail op-amps in portable medical monitors. IC Role / Device Role / Timing Role: Provides low-drift, low-noise bias point for amplifier input common-mode control. Use Value: ≤1 μA reverse leakage prevents loading of high-Z bias dividers, preserving offset accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5231B | Zener voltage 5.1 V (fixed), 500 mW Pd, rd = 17 Ω at 20 mA - higher power but narrower voltage range. | Not suitable for 7.9 V reference needs; requires redesign of bias network and resistor values. | Select only if system requires 5.1 V reference and higher current capability (>20 mA). |
| Vishay BZX55-C7V5 | Zener voltage 7.5 V (±5%), 500 mW Pd, rd = 15 Ω at 5 mA - looser tolerance and higher noise than HZS9A1LTD-E. | Acceptable for non-critical regulation but lacks low-noise performance needed in metrology-grade designs. | Choose when cost sensitivity outweighs noise and tolerance requirements in consumer-grade power supplies. |
Compared with MMBZ5231B and BZX55-C7V5, the HZS9A1LTD-E delivers tighter voltage tolerance (±0.2 V), lower noise, and optimized 60 Ω impedance at its specified 6 mA test current - making it uniquely suited for precision analog reference applications where stability and spectral purity are design-critical.
Availability
HZS9A1LTD-E is available at Aetrix Electronics and suitable for industrial sensor interfaces, precision data acquisition systems, and stabilized power supply feedback circuits requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.
Supply support for HZS9A1LTD-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-L Series was developed specifically for low-noise, high-stability voltage reference applications in industrial instrumentation and precision analog signal chains - emphasizing zener consistency, thermal resilience, and manufacturability.
FAQ
What is the zener voltage range for HZS9A1LTD-E?
The HZS9A1LTD-E has a guaranteed zener voltage range of 7.7 V to 8.1 V when tested at IZ = 0.5 mA and Ta = 25°C, per Renesas datasheet REJ03G0166-0300 Rev.3.00. This narrow ±0.2 V tolerance supports high-accuracy voltage referencing without post-production trimming, and the value is confirmed via DC testing - not AC or pulsed conditions.
Does HZS9A1LTD-E support high-temperature operation?
Yes, the HZS9A1LTD-E is rated for a maximum junction temperature of 200°C and storage temperature from −55°C to +175°C. Its silicon planar construction and MHD package enable reliable operation in industrial control cabinets and enclosed power systems where ambient temperatures exceed 85°C - provided power dissipation remains within the derated curve shown in Figure 3 of the datasheet.
How does the noise performance of HZS9A1LTD-E compare to standard Zener diodes?
The HZS9A1LTD-E achieves approximately 1/3 to 1/10 the noise level of the legacy HZ series Zener diodes, as stated in the "Features" section of the Renesas datasheet. This reduction is attributable to its optimized planar diffusion process and low dynamic resistance (60 Ω), making the HZS9A1LTD-E especially valuable in low-level analog signal paths such as sensor front-ends and high-resolution ADC references.
What is the dynamic resistance specification for HZS9A1LTD-E and why does it matter?
The HZS9A1LTD-E has a dynamic resistance of 60 Ω measured at IZ = 6.0 mA and Ta = 25°C. This parameter directly determines how much the zener voltage shifts under changing load current - a lower rd improves load regulation and ripple rejection in shunt regulator configurations. For example, a 1 mA change in sink current causes only ~60 mV deviation, supporting stable reference behavior in dynamic analog systems.
Is HZS9A1LTD-E compatible with automated PCB assembly processes?
Yes, the HZS9A1LTD-E uses the MHD package (JEITA GRZZ0002ZC-A) with 5 mm lead pitch and standardized axial geometry - explicitly designed for high-speed automatic insertion and wave soldering. Its 2.0 mm body diameter and 26 mm lead length comply with IPC-7351 guidelines for through-hole placement, and Renesas confirms suitability for 5 mm-pitch pick-and-place feeders in mass production.
HZS9A1LTD-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:
- -
HZS9A1LTD-E FAQ
1.How can I place an order for HZS9A1LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS9A1LTD-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 HZS9A1LTD-E reliable?
The price and inventory of HZS9A1LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS9A1LTD-E is usually 5 days.
3.What payment methods are accepted for HZS9A1LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS9A1LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS9A1LTD-E?
HZS9A1LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS9A1LTD-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 HZS9A1LTD-E?
For technical support, including HZS9A1LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS9A1LTD-E requirements.
6.How does Aetrix verify that HZS9A1LTD-E is sourced from the original manufacturer or authorized distributors?
All HZS9A1LTD-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 HZS9A1LTD-E meets industry standards.
7.What is the process for return or replacement of HZS9A1LTD-E?
All HZS9A1LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS9A1LTD-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 HZS9A1LTD-E part is unused and in its original packaging.
Return procedure for HZS9A1LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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