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Renesas HZ18-1LRE-E
- Part No.:
- HZ18-1LRE-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ18-1LRE-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
HZ18-1LRE-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, with a nominal zener voltage of 17.3 V (min 16.9 V, max 17.7 V), dynamic resistance of 80 Ω at 0.5 mA, maximum power dissipation of 400 mW, and junction temperature rating of 175°C - used in stabilized power supplies and reference circuits requiring low thermal drift.
For engineers reviewing the HZ18-1LRE-E datasheet, HZ18-1LRE-E pinout, HZ18-1LRE-E application, or HZ18-1LRE-E equivalent, key selection criteria include zener voltage tolerance, noise performance relative to legacy HZ series, DO-35 package compatibility, temperature coefficient behavior below 0.02 %/°C, and low leakage current under reverse bias.
Technical Context
This device operates as a two-terminal shunt regulator with DC-tested zener characteristics, specified at IZ = 0.5 mA and VR ≤ 2.0 V. Its low-noise design achieves approximately 1/3–1/10 the noise level of standard HZ-series diodes, enabled by optimized silicon planar junction processing and tight VZ binning across the HZ-L family.
The HZ18-1LRE-E exhibits a negative temperature coefficient near zero crossing (~0.02 %/°C at ~17.3 V), confirmed in Figure 2 of REJ03G0182-0300, and maintains stable rd ≤ 80 Ω up to 1 mA - critical for high-PSRR linear regulators and precision voltage references where impedance stability directly impacts output ripple rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.9–17.7 V at IZ = 0.5 mA - defines regulated output voltage range for reference designs |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - determines load regulation error and AC ripple attenuation |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and heatsinking |
| Junction Temperature (Tj) | −55 to +175°C - enables operation in industrial and automotive under-hood environments |
| Reverse Leakage (IR) | 1 μA max at VR = 2.0 V - ensures minimal quiescent current in high-impedance bias networks |
| Temperature Coefficient (γZ) | ≈0.02 %/°C near 17.3 V - minimizes drift-induced error in precision voltage references |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded case with orange body and navy-blue cathode band. Mass: 0.13 g. Dimensions per SC-40 standard: φD = 2.0 mm, E = 4.2 mm, L = 26.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to positive rail in shunt configuration; carries full load current plus zener bias current |
| 2 (Anode) | Reference ground node | Common return path; must be low-impedance to minimize noise coupling into regulation loop |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener junction | 1/3–1/10 noise vs. standard HZ series - improves SNR in audio preamps and sensor signal chains |
| Tight VZ tolerance binning | ±0.4 V window (16.9–17.7 V) - reduces calibration overhead in factory-trimmed instruments |
| Stable dynamic impedance | rd ≤ 80 Ω up to 1 mA - maintains regulation accuracy across varying load currents |
| High-temperature reliability | Rated to 175°C junction - supports use in enclosed power supplies without forced cooling |
Applications
| High-Precision Voltage Reference | Low-Noise Audio Power Supply |
|---|---|
Use Scenario: Providing stable 17.3 V reference for 24-bit SAR ADCs and programmable gain instrumentation amplifiers in data acquisition systems. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise bias point for analog front-end circuitry. Use Value: Low dynamic resistance (80 Ω) and minimal temperature drift (0.02 %/°C) reduce measurement uncertainty to <0.01% FS over 0–70°C. | Use Scenario: Regulating B+ rail in discrete Class-A headphone amplifiers where supply ripple directly modulates output stage linearity. IC Role / Device Role / Timing Role: Low-noise shunt regulator filtering switching noise from upstream DC/DC converters. Use Value: 1/10 noise vs. legacy HZ diodes suppresses audible hiss and preserves dynamic range above 110 dB(A). |
| Industrial Sensor Excitation | Programmable Current Source Bias |
Use Scenario: Supplying excitation voltage to 4-wire RTD bridges and strain gauge Wheatstone networks in PLC analog input modules. IC Role / Device Role / Timing Role: Stable voltage source enabling ratiometric measurement against bridge output. Use Value: Tight VZ tolerance (±0.4 V) eliminates need for per-channel digital calibration, reducing firmware complexity. | Use Scenario: Setting reference voltage for op-amp-based Howland current sources driving 4–20 mA loop transmitters. IC Role / Device Role / Timing Role: Precision voltage node defining compliance limit and current setpoint accuracy. Use Value: Low leakage (<1 μA) prevents error accumulation in high-impedance feedback paths, maintaining ±0.1% current accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4746A | VZ = 18 V ±5%, rd = 15 Ω typical but higher noise, Pd = 1 W, DO-41 package | Higher power handling but lacks low-noise optimization; unsuitable for sub-mV noise-critical references | Select when thermal margin >400 mW is required and noise floor is secondary to cost |
| BZX85C18 | VZ = 18 V ±5%, rd = 40 Ω typical, Pd = 1.3 W, DO-41, no published noise spec | Higher power and lower impedance but uncharacterized noise performance; not validated for low-noise use | Choose only for general-purpose stabilization where noise specification is undefined or relaxed |
Compared with 1N4746A and BZX85C18, the HZ18-1LRE-E trades higher power rating for quantified ultra-low noise and tighter VZ binning - making it uniquely suitable for metrology-grade references where noise and drift dominate error budgets.
Availability
HZ18-1LRE-E is available at Aetrix Electronics and suitable for stabilized power supplies, precision voltage references, low-noise audio circuits, and industrial sensor excitation requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for HZ18-1LRE-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 is a global semiconductor manufacturer specializing in microcontrollers, analog power devices, and timing solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series is part of Renesas' precision analog portfolio, engineered specifically for low-noise voltage reference and regulation in high-fidelity signal conditioning and metrology applications.
FAQ
What is the exact zener voltage range for HZ18-1LRE-E?
The HZ18-1LRE-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, as specified in the REJ03G0182-0300 datasheet on page 3. This 0.8 V window reflects tight binning for precision reference use, and the nominal value is 17.3 V. The HZ18-1LRE-E does not support adjustable or programmable voltage settings.
Is HZ18-1LRE-E compatible with DO-35 socket footprints?
Yes, the HZ18-1LRE-E uses the standard DO-35 package (JEITA code GRZZ0002ZB-A) with 2.0 mm body diameter and 26.0 mm overall length, matching IPC-7351B footprint requirements for axial-leaded DO-35 components. Its cathode band is navy blue and body color is orange, consistent with Renesas' HZ-L Series marking convention. The HZ18-1LRE-E requires no adapter or mechanical modification for DO-35-compatible PCB layouts.
How does the noise performance of HZ18-1LRE-E compare to standard Zener diodes?
The HZ18-1LRE-E delivers approximately 1/3 to 1/10 the noise level of conventional HZ-series Zener diodes, achieved through proprietary silicon planar junction processing and low-defect epitaxial layer control. This is explicitly documented in the "Features" section of REJ03G0182-0300. The HZ18-1LRE-E is not a generic low-noise diode - its noise reduction is measured and validated specifically within the HZ-L family context.
What is the maximum allowable reverse current before breakdown for HZ18-1LRE-E?
The HZ18-1LRE-E specifies a maximum reverse leakage current (IR) of 1 μA at VR = 2.0 V and Ta = 25°C, per the Electrical Characteristics table on page 2 of REJ03G0182-0300. This parameter is distinct from zener test current (IZ = 0.5 mA); exceeding 2.0 V in reverse bias risks entering unregulated conduction. The HZ18-1LRE-E is not rated for avalanche operation outside its defined zener region.
Does HZ18-1LRE-E have a specified temperature coefficient curve?
Yes, the HZ18-1LRE-E's temperature coefficient (γZ) is characterized in Figure 2 of REJ03G0182-0300, showing ≈0.02 %/°C near 17.3 V. This near-zero crossing point minimizes drift over −25°C to +85°C ambient ranges common in industrial instrumentation. The HZ18-1LRE-E does not provide user-adjustable compensation or external trimming for γZ.
HZ18-1LRE-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:
- -
HZ18-1LRE-E FAQ
1.How can I place an order for HZ18-1LRE-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ18-1LRE-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 HZ18-1LRE-E reliable?
The price and inventory of HZ18-1LRE-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ18-1LRE-E is usually 5 days.
3.What payment methods are accepted for HZ18-1LRE-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ18-1LRE-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ18-1LRE-E?
HZ18-1LRE-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ18-1LRE-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 HZ18-1LRE-E?
For technical support, including HZ18-1LRE-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ18-1LRE-E requirements.
6.How does Aetrix verify that HZ18-1LRE-E is sourced from the original manufacturer or authorized distributors?
All HZ18-1LRE-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 HZ18-1LRE-E meets industry standards.
7.What is the process for return or replacement of HZ18-1LRE-E?
All HZ18-1LRE-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ18-1LRE-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 HZ18-1LRE-E part is unused and in its original packaging.
Return procedure for HZ18-1LRE-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ18-1LRE-E Tags
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