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Renesas HZS18-1LTA-E
- Part No.:
- HZS18-1LTA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS18-1LTA-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS18-1LTA-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 16.9–17.7 V, 400 mW power dissipation, and dynamic resistance of 15.0 Ω at 0.5 mA test current - deployed in industrial instrumentation and sensor signal conditioning.
For engineers reviewing the HZS18-1LTA-E datasheet, HZS18-1LTA-E pinout, HZS18-1LTA-E application, or HZS18-1LTA-E equivalent, this device is selected for low-noise reference stability, tight zener voltage tolerance, and compatibility with high-speed automatic insertion on 5 mm-pitch PCBs in production-grade analog subsystems.
Technical Context
This Zener diode employs a silicon planar junction structure to achieve low noise (≈1/3–1/10 that of the legacy HZ series), low leakage current, and stable zener impedance across its operating range. Its design targets DC voltage reference and regulation where spectral purity and thermal stability are critical.
It operates within a junction temperature range of −55°C to +200°C and is rated for storage up to +175°C. The device exhibits a zener voltage temperature coefficient near zero at ~18 V (per Fig.2), minimizing drift in mid-range reference applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.9–17.7 V at IZ = 0.5 mA - defines precise DC reference level for feedback loops and analog comparators |
| Dynamic Resistance (rd) | 15.0 Ω max at IZ = 0.5 mA - ensures minimal output impedance and high regulation stiffness under load variation |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - supports continuous operation in compact SMT-compatible through-hole packages without forced cooling |
| Reverse Leakage Current (IR) | 1 μA max at VR = 15.0 V - enables low-error biasing in high-impedance reference networks |
| Junction Temperature (Tj) | 200°C maximum - allows reliable operation in thermally demanding industrial environments |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 5 mm-pitch axial lead package compatible with high-speed automated insertion equipment |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial-leaded, 2-terminal silicon planar Zener diode with black cathode band marking. Mass: 0.084 g (typ.). Dimensions: φD = 2.0 mm, E = 2.4 mm, L = 26.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated output node; reverse-biased operation requires positive voltage applied here relative to anode |
| 2 (Anode) | Reference ground/reference return | Typically tied to system ground or common rail; completes current path during zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈1/3–1/10 that of HZ series - directly improves SNR in precision voltage references and analog front-ends |
| Stable zener impedance | 15.0 Ω max at 0.5 mA - maintains regulation accuracy across varying load currents in unregulated supplies |
| Wide zener voltage range | 5.2–38 V coverage across HZS-L family - enables single-source selection for diverse reference needs without redesign |
| Automated assembly compatibility | 5 mm pitch and MHD mechanical form - supports high-throughput placement in industrial PCB manufacturing lines |
Applications
| Industrial Sensor Signal Conditioning | Precision Analog Reference Supply |
|---|---|
Use Scenario: Amplifying and conditioning low-level signals from strain gauges, RTDs, or pressure transducers in factory-floor monitoring systems. IC Role / Device Role / Timing Role: Provides stable, low-noise 17 V reference for op-amp biasing and ADC reference voltage generation. Use Value: Reduces measurement uncertainty by suppressing zener-induced broadband noise that would otherwise corrupt sub-mV signal resolution. |
Use Scenario: Generating a clean, fixed reference voltage for 16-bit SAR ADCs in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Functions as primary shunt reference in a buffered reference circuit feeding the ADC's VREF pin. Use Value: Enables <±0.01% initial accuracy and <10 ppm/°C drift over temperature due to low γZ and stable rd. |
| Stabilized Power Supply Feedback | Overvoltage Protection Clamping |
Use Scenario: Regulating 24 V DC industrial power rails using discrete linear regulators or TL431-based feedback networks. IC Role / Device Role / Timing Role: Sets precise output voltage threshold via resistor divider in secondary-side feedback loop. Use Value: Maintains ±1% output regulation across line/load transients thanks to low dynamic resistance and tight VZ tolerance. |
Use Scenario: Protecting microcontroller I/O pins and analog inputs from transient overvoltage events in motor drive control boards. IC Role / Device Role / Timing Role: Acts as fast-acting shunt clamp triggered above 17.7 V, diverting surge current away from sensitive circuitry. Use Value: Limits clamping voltage overshoot to <18.5 V with <100 ns response, preventing latch-up in 3.3 V/5 V logic interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A (ON Semiconductor) | Zener voltage 18 V ±5%, rd = 20 Ω, Pd = 1 W, DO-41 package | Higher power rating but higher noise and looser VZ tolerance; less suitable for low-drift analog references | Select when higher power handling is required and noise performance is secondary |
| BZX84-C18 (Diodes Inc.) | Zener voltage 18 V ±5%, rd = 40 Ω, Pd = 300 mW, SOT-23 surface-mount | Smaller footprint but significantly higher dynamic resistance and noise - limits use in precision feedback paths | Select only for space-constrained digital I/O protection where absolute voltage accuracy is non-critical |
Compared with 1N4746A and BZX84-C18, HZS18-1LTA-E delivers superior low-noise performance and tighter zener voltage control in a through-hole package optimized for automated insertion - making it preferred for industrial analog signal chains requiring long-term stability and minimal spectral contamination.
Availability
HZS18-1LTA-E is available at Aetrix Electronics and suitable for industrial sensor conditioning, precision analog reference supply, and stabilized power supply feedback requiring stable component supply and consistent parametric performance across production batches.
Supply support for HZS18-1LTA-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 infrastructure markets.
HZS18-1LTA-E belongs to the HZS-L Series of low-noise silicon planar Zener diodes, designed specifically for high-stability voltage reference and regulation in industrial instrumentation and precision analog systems.
FAQ
What is the exact zener voltage range specified for HZS18-1LTA-E?
The HZS18-1LTA-E has a guaranteed zener voltage range of 16.9 V to 17.7 V when tested at IZ = 0.5 mA and Ta = 25°C. This 0.8 V span reflects the device's tight process control and is documented in the Electrical Characteristics table on page 3 of Renesas document REJ03G0166-0300 Rev.3.00. The HZS18-1LTA-E achieves this specification using silicon planar junction technology with low intrinsic noise.
Is HZS18-1LTA-E suitable for surface-mount assembly?
No, HZS18-1LTA-E uses the MHD axial-leaded package (JEITA GRZZ0002ZC-A), which is designed for through-hole mounting and high-speed automatic insertion on 5 mm-pitch PCBs. It is not a surface-mount device. For SMT alternatives, Renesas offers other families such as the UDZ series, but the HZS18-1LTA-E itself requires wave soldering or hand-soldered through-hole placement.
What is the maximum allowable junction temperature for HZS18-1LTA-E?
The absolute maximum junction temperature (Tj) for HZS18-1LTA-E is 200°C, as specified in the Absolute Maximum Ratings table on page 2 of the Renesas datasheet. This rating enables reliable operation in high-temperature industrial enclosures, provided power dissipation remains within derated limits per the ambient temperature curve in Figure 3.
Does HZS18-1LTA-E have a specified zener voltage temperature coefficient?
Yes - while the datasheet does not list a numeric γZ value for HZS18-1LTA-E individually, Figure 2 ("Temperature Coefficient vs. Zener Voltage") shows that devices in the ~18 V range exhibit a zener voltage temperature coefficient near 0 mV/°C (±0.02 mV/°C). This near-zero drift behavior is a key design feature of the HZS-L Series and directly benefits HZS18-1LTA-E in precision reference applications.
Can HZS18-1LTA-E be used as a direct replacement for older HZ-series Zener diodes?
HZS18-1LTA-E is not a pin-to-pin or electrical drop-in replacement for legacy HZ-series diodes due to differences in noise performance, dynamic resistance, and tighter voltage tolerances. While both share the same MHD package and basic function, the HZS-L Series was engineered specifically for lower noise (≈1/3–1/10 of HZ) and improved stability - substituting HZS18-1LTA-E may require validation of noise-sensitive circuit performance, especially in analog signal chains.
HZS18-1LTA-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:
- -
HZS18-1LTA-E FAQ
1.How can I place an order for HZS18-1LTA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS18-1LTA-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 HZS18-1LTA-E reliable?
The price and inventory of HZS18-1LTA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS18-1LTA-E is usually 5 days.
3.What payment methods are accepted for HZS18-1LTA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS18-1LTA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS18-1LTA-E?
HZS18-1LTA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS18-1LTA-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 HZS18-1LTA-E?
For technical support, including HZS18-1LTA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS18-1LTA-E requirements.
6.How does Aetrix verify that HZS18-1LTA-E is sourced from the original manufacturer or authorized distributors?
All HZS18-1LTA-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 HZS18-1LTA-E meets industry standards.
7.What is the process for return or replacement of HZS18-1LTA-E?
All HZS18-1LTA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS18-1LTA-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 HZS18-1LTA-E part is unused and in its original packaging.
Return procedure for HZS18-1LTA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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