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Renesas HZS18-3LTA-E
- Part No.:
- HZS18-3LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS18-3LTA-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS18-3LTA-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog and stabilized power supply circuits, with a nominal zener voltage of 18.1–19.0 V, dynamic resistance of 15.0 Ω at 0.5 mA test current, and maximum power dissipation of 400 mW in the MHD package.
For engineers reviewing the HZS18-3LTA-E datasheet, HZS18-3LTA-E pinout, HZS18-3LTA-E application, or HZS18-3LTA-E equivalent, this device is selected for noise-sensitive reference design, low-drift biasing, and high-stability DC regulation where zener impedance and temperature coefficient directly impact system accuracy and long-term repeatability.
Technical Context
The HZS18-3LTA-E employs a silicon planar junction structure to achieve low noise-approximately 1/3 to 1/10 that of the legacy HZ series-with tightly controlled zener voltage tolerance (±0.5 V) and low leakage current (≤1 μA at VR = 15.0 V). Its zener voltage temperature coefficient is approximately +0.06 %/°C near 18 V, indicating positive drift over temperature.
Designed for DC-regulated operation, it operates within a junction temperature range of −55°C to +200°C and supports stable performance up to 175°C storage temperature. The device is rated for 5 mm-pitch high-speed automatic insertion and complies with JEITA package code GRZZ0002ZC-A (MHD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.1–19.0 V at IZ = 0.5 mA - defines stable regulation point for mid-range DC references |
| Dynamic Resistance (rd) | 15.0 Ω max at IZ = 0.5 mA - ensures minimal output impedance variation under load transients |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in compact PCB layouts without forced cooling |
| Reverse Leakage (IR) | ≤1 μA at VR = 15.0 V - preserves low quiescent current in battery-powered or ultra-low-power bias networks |
| Junction Temperature (Tj) | −55°C to +200°C - enables use in industrial and automotive under-hood environments |
| Package | MHD (JEITA GRZZ0002ZC-A) - standardized 2-pin axial leaded package compatible with 5 mm pitch automated insertion |
Pinout & Package
The HZS18-3LTA-E is housed in the MHD axial-leaded package (JEITA GRZZ0002ZC-A), featuring a black cathode band and mechanical dimensions per Renesas specification: body diameter φD = 2.0 mm (nom), lead diameter φb = 0.4 mm (nom), overall length L ≈ 26.0 mm, mass ≈ 0.084 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener voltage reference node | Connected to regulated output or higher-potential rail; polarity must be observed to maintain reverse-bias operation |
| 2 (Anode) | Current return path | Typically tied to ground or lower-potential node; forms current loop with series resistor for bias control |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | 1/3–1/10 noise vs. HZ series - critical for audio preamps, sensor excitation, and metrology-grade references |
| Tight zener voltage tolerance | ±0.5 V window at 18.1–19.0 V - reduces calibration overhead in production test and field trimming |
| Low dynamic impedance | 15.0 Ω max - maintains regulation stability under varying load currents without external compensation |
| High thermal robustness | 200°C max junction temperature - supports operation in thermally constrained enclosures or near heat sources |
Applications
| High-Precision Reference Source | Stabilized Power Supply |
|---|---|
Use Scenario: Generating a low-drift, low-noise 18 V reference for 16-bit DACs and high-resolution ADCs in data acquisition systems. IC Role / Device Role / Timing Role: Zener diode provides primary voltage reference node with minimal thermal hysteresis and noise coupling. Use Value: Enables <1 LSB integral nonlinearity error over temperature due to stable 15.0 Ω dynamic resistance and +0.06 %/°C tempco. | Use Scenario: Regulating auxiliary 18 V rail for op-amp biasing and analog front-end circuitry in industrial PLC modules. IC Role / Device Role / Timing Role: Functions as shunt regulator in conjunction with series resistor to maintain constant output under variable load. Use Value: Delivers 400 mW power handling and ≤1 μA leakage to sustain regulation during standby while minimizing idle power loss. |
| Sensor Excitation Circuit | Low-Drift Bias Network |
Use Scenario: Supplying excitation voltage to strain-gauge bridges and RTD interfaces requiring stable, low-noise bias. IC Role / Device Role / Timing Role: Serves as noise-suppressed voltage source replacing IC-based references where EMI immunity is critical. Use Value: Achieves 1/10 noise level of standard Zeners, reducing bridge measurement uncertainty by >3× in microvolt-level outputs. | Use Scenario: Setting precise bias points for JFET-input op-amps and discrete transistor amplifiers in instrumentation amplifiers. IC Role / Device Role / Timing Role: Provides fixed, temperature-compensated DC offset independent of supply ripple or load variation. Use Value: Maintains <±2 mV drift over −40°C to +85°C ambient due to predictable +0.06 %/°C zener tempco and low rd. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX85C18 (Nexperia) | Zener voltage 18 V ±5%, rd = 20 Ω, Pd = 1.3 W, DO-41 package | Higher power rating but higher noise and looser voltage tolerance; not qualified for low-noise analog use | Select when higher power handling is required and noise is secondary to cost or availability |
| 1N4746A (ON Semiconductor) | Zener voltage 18 V ±5%, rd = 21 Ω, Pd = 1.0 W, DO-41 package | Standard noise floor, wider VZ tolerance, and larger package footprint than MHD | Choose for general-purpose regulation where tight tempco and ultra-low noise are not required |
Compared with BZX85C18 and 1N4746A, the HZS18-3LTA-E offers superior noise performance, tighter voltage binning, and smaller MHD footprint-making it preferred for space-constrained, high-fidelity analog designs despite its lower power rating.
Availability
HZS18-3LTA-E is available at Aetrix Electronics and suitable for precision reference sources, stabilized power supplies, sensor excitation circuits, and low-drift bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for HZS18-3LTA-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 belongs to Renesas' precision analog portfolio, engineered specifically for low-noise voltage reference and stabilization applications where zener impedance, temperature coefficient, and long-term drift are critical design parameters.
FAQ
What is the zener voltage range of the HZS18-3LTA-E?
The HZS18-3LTA-E has a specified zener voltage range of 18.1 V to 19.0 V at a test current of 0.5 mA, as confirmed in the Renesas REJ03G0166-0300 datasheet. This tight 0.9 V window supports high-accuracy regulation without post-production trimming. The HZS18-3LTA-E achieves this via silicon planar junction processing and binning across the HZS-L family's A/B/C subvariants.
Does the HZS18-3LTA-E have a documented temperature coefficient?
Yes-the HZS18-3LTA-E exhibits a zener voltage temperature coefficient of approximately +0.06 %/°C, consistent with the 18 V region shown in Figure 2 of the Renesas datasheet. This positive, low-magnitude tempco enables predictable drift behavior in thermal management calculations. The HZS18-3LTA-E's coefficient is significantly more stable than generic Zeners, supporting designs requiring <±5 mV total drift over −40°C to +85°C.
What is the maximum power dissipation rating for the HZS18-3LTA-E?
The HZS18-3LTA-E is rated for a maximum power dissipation of 400 mW at Ta = 25°C, with derating above that ambient per Figure 3 in the Renesas datasheet. This rating applies to the MHD package and assumes standard PCB mounting on a 100 × 180 × 1.6 mm phenolic board. The HZS18-3LTA-E's 400 mW limit balances thermal safety and low-noise performance in compact analog layouts.
Is the HZS18-3LTA-E suitable for low-noise applications?
Yes-the HZS18-3LTA-E is explicitly designed for low-noise applications, with noise reduced to approximately 1/3–1/10 that of the legacy HZ series, as stated in the Renesas datasheet features. Its low dynamic resistance (15.0 Ω) and planar junction construction minimize broadband noise generation. Engineers specify the HZS18-3LTA-E in audio preamplifier references, precision sensor bridges, and metrology equipment where noise floor directly impacts measurement resolution.
What package type does the HZS18-3LTA-E use?
The HZS18-3LTA-E uses the MHD axial-leaded package (JEITA code GRZZ0002ZC-A), with a black cathode band, 2.0 mm nominal body diameter, and 26.0 mm overall length. This package supports 5 mm-pitch high-speed automatic insertion and is mechanically identical across the HZS-L series. The HZS18-3LTA-E's MHD footprint ensures compatibility with legacy through-hole assembly lines and thermal profiles validated for phenolic PCB substrates.
HZS18-3LTA-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:
- -
HZS18-3LTA-E FAQ
1.How can I place an order for HZS18-3LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS18-3LTA-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 HZS18-3LTA-E reliable?
The price and inventory of HZS18-3LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS18-3LTA-E is usually 5 days.
3.What payment methods are accepted for HZS18-3LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS18-3LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS18-3LTA-E?
HZS18-3LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS18-3LTA-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 HZS18-3LTA-E?
For technical support, including HZS18-3LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS18-3LTA-E requirements.
6.How does Aetrix verify that HZS18-3LTA-E is sourced from the original manufacturer or authorized distributors?
All HZS18-3LTA-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 HZS18-3LTA-E meets industry standards.
7.What is the process for return or replacement of HZS18-3LTA-E?
All HZS18-3LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS18-3LTA-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 HZS18-3LTA-E part is unused and in its original packaging.
Return procedure for HZS18-3LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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