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Renesas HZS5ALLTA-E
- Part No.:
- HZS5ALLTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS5ALLTA-E.pdf
- Description:
- DIODE ZENER
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Inventory:61,296
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Product details
Overview
HZS5ALLTA-E from Renesas Electronics is a silicon planar Zener diode optimized for hard-knee, low-noise voltage reference applications at low current (IZ = 0.5 mA), with a nominal Zener voltage of 4.5 V (min 4.3 V, max 4.7 V), dynamic impedance of 380 Ω at IZT = 3.0 mA, and temperature coefficient of ±0.6 mV/°C - used in precision analog power supply regulation and sensor biasing circuits.
For engineers reviewing the HZS5ALLTA-E datasheet, HZS5ALLTA-E pinout, HZS5ALLTA-E application, or HZS5ALLTA-E equivalent, key selection criteria include its sharp breakdown knee below 1 mA, low noise performance (~1/10 that of standard Zeners), 250 mW power dissipation rating, MHD package compatibility with 5 mm-pitch automatic insertion, and suitability for industrial-grade reference designs requiring stable low-current regulation.
Technical Context
The HZS5ALLTA-E employs a silicon planar junction structure engineered to deliver semilogarithmic linear Vz–Iz characteristics from 1 nA to 1 mA, enabling precise low-current regulation without soft knee degradation. Its hard-knee behavior is achieved via controlled doping and junction geometry, minimizing voltage drift under microampere-level loads.
It exhibits low dynamic impedance (380 Ω typical at 3 mA) and ultra-low noise - confirmed by comparative measurement against legacy Zener families - making it suitable for high-resolution ADC references and low-power sensor excitation where ripple and thermal noise must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V min to 4.7 V max at IZ = 0.5 mA - defines tight regulation window for 4.5 V nominal reference systems |
| Dynamic Impedance (ZZT) | 380 Ω typical at IZT = 3.0 mA - ensures minimal output voltage shift under load transients |
| Reverse Current (IR) | ≤100 nA at VR = 1.0 V - enables ultra-low leakage bias networks in battery-powered sensors |
| Power Dissipation (Pd) | 250 mW at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Junction Temperature (Tj) | 175°C maximum - allows reliable operation in industrial ambient environments up to 125°C with derating |
| Temperature Coefficient (γZ) | ±0.6 mV/°C - provides predictable, low-drift voltage reference over –55°C to +125°C operating range |
Pinout & Package
The HZS5ALLTA-E is housed in the MHD package (JEITA code GRZZ0002ZC-A), a radial leaded, epoxy-molded case with 2.0 mm diameter body and 26.0 mm lead length, designed for 5 mm-pitch automated insertion and compatible with paper-phenol PCBs (100 × 180 × 1.6 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated positive rail; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Ground or common reference node; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hard-knee breakdown | VZ–IZ curve remains linear down to 1 nA - eliminates ambiguity in low-current regulation thresholds |
| Low-noise operation | Approximately 1/10 the noise of conventional Zeners - critical for high-SNR analog front-ends |
| Low-temperature coefficient | ±0.6 mV/°C - reduces calibration burden in wide-temperature industrial instrumentation |
| High linearity at microcurrents | ∆VZ1 ≤ 0.5 V and ∆VZ2 ≤ 0.6 V across 0.001–0.5 mA - enables accurate extrapolation to sub-µA bias points |
| Automated assembly compatibility | MHD package with 5 mm pitch - supports high-throughput placement in consumer and industrial manufacturing |
Applications
| Industrial Sensor Biasing | Precision ADC Reference |
|---|---|
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in factory-floor condition monitoring systems. IC Role / Device Role / Timing Role: Low-noise, low-drift Zener reference source replacing higher-power shunt regulators. Use Value: Enables <10 ppm/°C system gain drift by delivering 4.5 V ±0.2 V with <0.6 mV/°C TC and sub-100 nA leakage. |
Use Scenario: Serving as the external reference for 16-bit SAR ADCs in portable test equipment requiring <0.1% full-scale accuracy. IC Role / Device Role / Timing Role: Primary voltage reference element defining ADC quantization step size. Use Value: Delivers low-noise, hard-knee regulation at 3 mA, reducing reference-induced ENOB loss by ≥1.5 bits versus standard Zeners. |
| Low-Power IoT Node Regulation | Legacy System Voltage Clamping |
Use Scenario: Regulating 4.5 V supply rails in battery-operated NB-IoT modules with sleep currents <1 µA. IC Role / Device Role / Timing Role: Ultra-low-quiescent shunt regulator maintaining reference integrity during deep-sleep cycles. Use Value: Maintains regulation down to 1 nA reverse current, eliminating need for auxiliary bias circuitry and extending battery life >20%. |
Use Scenario: Protecting input stages of legacy op-amps and microcontrollers against transient overvoltage in industrial control panels. IC Role / Device Role / Timing Role: Fast-response clamp device absorbing ESD and surge energy before IC damage occurs. Use Value: Sharp knee and 250 mW Pd allow clamping at 4.5 V with <100 ns response - faster than TVS diodes in sub-5 V domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3 (Nexperia) | 4.3 V nominal, 90 Ω ZZT @ 5 mA, ±5% tolerance, SOT-23 package | Higher power density but higher noise and softer knee; requires PCB space optimization | Select when board area is constrained and ±5% VZ tolerance is acceptable |
| 1N4733A (ON Semiconductor) | 5.1 V nominal, 7 Ω ZZT @ 49 mA, DO-41 package, 1 W Pd | Higher power handling but significantly higher noise and poor low-current linearity | Select only for high-current (>10 mA) regulation where noise and knee sharpness are secondary |
Compared with BZX84-C4V3 and 1N4733A, the HZS5ALLTA-E uniquely balances ultra-low-noise operation, hard-knee behavior below 1 mA, and industrial-grade temperature stability - making it the preferred choice for precision low-power analog subsystems where reference integrity directly impacts measurement fidelity.
Availability
HZS5ALLTA-E is available at Aetrix Electronics and suitable for industrial sensor biasing, precision ADC reference design, and low-power IoT node regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for HZS5ALLTA-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 applications.
The HZS-LL Series was developed specifically for high-stability, low-noise voltage reference applications in industrial instrumentation and sensor interfaces - emphasizing hard-knee regulation, microampere-level linearity, and robust thermal performance.
FAQ
What is the Zener voltage tolerance of HZS5ALLTA-E?
The HZS5ALLTA-E has a specified Zener voltage range of 4.3 V minimum to 4.7 V maximum at IZ = 0.5 mA, yielding a ±0.2 V absolute tolerance (±4.4% of nominal 4.5 V). This tighter tolerance than standard Zeners supports higher-accuracy reference designs without post-manufacturing trimming. The HZS5ALLTA-E achieves this via process-controlled junction doping and on-wafer screening.
Does HZS5ALLTA-E support operation below 1 mA?
Yes, the HZS5ALLTA-E is explicitly characterized down to 1 nA reverse current, with semilogarithmic linear VZ–IZ behavior confirmed from 1 nA to 1 mA. Its hard-knee performance at microampere levels makes the HZS5ALLTA-E suitable for ultra-low-power sensor biasing and sleep-mode regulation where traditional Zeners exhibit excessive voltage droop.
What is the maximum ambient temperature for continuous operation of HZS5ALLTA-E?
The HZS5ALLTA-E supports continuous operation up to 125°C ambient temperature when derated per the published power dissipation vs. ambient temperature curve (Fig.3). At 125°C, its usable power dissipation drops to ~120 mW. The HZS5ALLTA-E's 175°C maximum junction temperature and –55°C to +175°C storage range ensure reliability in harsh industrial environments.
Is HZS5ALLTA-E RoHS compliant?
Yes, the HZS5ALLTA-E complies with the EU RoHS Directive (2011/65/EU) and contains no restricted substances above threshold limits. Renesas confirms RoHS compliance for the entire HZS-LL Series, including the HZS5ALLTA-E, as documented in official environmental declarations available through Renesas sales offices and authorized distributors.
Can HZS5ALLTA-E replace standard 4.3 V Zeners like 1N4731A?
The HZS5ALLTA-E is not a direct drop-in replacement for 1N4731A due to differences in ZZT (380 Ω vs. 95 Ω), power rating (250 mW vs. 1 W), and low-current linearity. While both regulate near 4.3 V, the HZS5ALLTA-E excels in low-noise, low-current precision roles, whereas 1N4731A suits higher-power, less-sensitive applications. System validation is required before substituting the HZS5ALLTA-E.
HZS5ALLTA-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:
- -
HZS5ALLTA-E FAQ
1.How can I place an order for HZS5ALLTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS5ALLTA-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 HZS5ALLTA-E reliable?
The price and inventory of HZS5ALLTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS5ALLTA-E is usually 5 days.
3.What payment methods are accepted for HZS5ALLTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS5ALLTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS5ALLTA-E?
HZS5ALLTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS5ALLTA-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 HZS5ALLTA-E?
For technical support, including HZS5ALLTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS5ALLTA-E requirements.
6.How does Aetrix verify that HZS5ALLTA-E is sourced from the original manufacturer or authorized distributors?
All HZS5ALLTA-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 HZS5ALLTA-E meets industry standards.
7.What is the process for return or replacement of HZS5ALLTA-E?
All HZS5ALLTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS5ALLTA-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 HZS5ALLTA-E part is unused and in its original packaging.
Return procedure for HZS5ALLTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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