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Renesas HZ18-1RE-E
- Part No.:
- HZ18-1RE-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ18-1RE-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:16,000
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Product details
Overview
HZ18-1RE-E from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 17.3 V (min 16.9 V, max 17.7 V), dynamic resistance of 15.0 Ω at 0.5 mA, maximum power dissipation of 400 mW, and low leakage current - used in stabilized power supplies and reference circuits requiring stable DC bias.
For engineers reviewing the HZ18-1RE-E datasheet, HZ18-1RE-E pinout, HZ18-1RE-E application, or HZ18-1RE-E equivalent, key selection criteria include zener voltage tolerance, temperature coefficient (−0.02 %/°C at ~17.3 V), DO-35 package compatibility, low noise performance versus standard HZ series, and thermal derating above 25°C ambient.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. It delivers stable regulation under reverse-biased DC conditions with specified test current of 0.5 mA and maximum reverse current of 1 μA at VR = 15.0 V.
The HZ18-1RE-E exhibits a negative zener voltage temperature coefficient of −0.02 %/°C near its operating point, consistent with mid-voltage Zeners (15–20 V range), and is rated for junction temperatures up to 175°C with storage range from −55°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.9 V min / 17.7 V max at IZ = 0.5 mA - defines regulated output voltage window under nominal bias |
| Dynamic Resistance (rd) | 15.0 Ω max at IZ = 0.5 mA - determines load regulation sensitivity and noise rejection capability |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets absolute thermal limit before derating begins |
| Reverse Current (IR) | 1 μA max at VR = 15.0 V - ensures minimal standby leakage in high-impedance reference nodes |
| Zener Voltage Tempco (γZ) | −0.02 %/°C - enables predictable drift compensation in temperature-stable references |
| Junction Temperature (Tj) | 175°C max - supports operation in compact, thermally constrained PCB layouts |
Pinout & Package
Package: DO-35 (JEITA code GRZZ0002ZB-A), glass axial leaded package with orange body color and navy-blue cathode band. Total mass ≈ 0.13 g; lead spacing E = 4.2 mm; body diameter φD = 2.0 mm; length L = 26.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference node | Connected to regulated output or positive rail; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Ground or return path | Serves as current sink terminal; ties to circuit common or current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| Noise level | Approximately 1/3–1/10 lower than standard HZ-series Zeners - critical for audio preamps and sensor front-ends |
| Zener impedance | Low dynamic resistance (15.0 Ω) improves regulation accuracy under varying load currents |
| Voltage range coverage | Part of HZ-L family spanning 5.2 V to 38 V - enables single-source design flexibility across multiple supply rails |
| Thermal robustness | Rated for 175°C junction temperature - suitable for industrial environments with elevated ambient temps |
Applications
| Audio Signal Conditioning | Precision Instrumentation Reference |
|---|---|
Use Scenario: Low-noise DC bias generation for op-amp input stages and microphone preamplifiers in studio-grade audio equipment. IC Role / Device Role / Timing Role: Provides ultra-low-noise, stable reference voltage to minimize audible hiss and distortion in analog signal paths. Use Value: Achieves >10 dB lower broadband noise versus standard Zeners, directly improving SNR in sensitive gain stages. | Use Scenario: Stable excitation voltage source for bridge-based strain gauges and RTD measurement circuits in data acquisition systems. IC Role / Device Role / Timing Role: Functions as a low-drift, low-impedance voltage reference for ratiometric ADC conversions. Use Value: −0.02 %/°C tempco and 15.0 Ω impedance reduce measurement error drift to <0.05% over 0–70°C ambient range. |
| Industrial Power Supply Regulation | Medical Sensor Biasing |
Use Scenario: Secondary voltage clamp and feedback reference in isolated DC-DC converters for PLC I/O modules. IC Role / Device Role / Timing Role: Maintains tight output regulation under variable line/load conditions while surviving transient surges. Use Value: 400 mW power rating and 175°C Tj rating support reliable operation in unventilated control cabinets. | Use Scenario: Bias voltage generator for photodiode transimpedance amplifiers in pulse oximetry and EEG front-ends. IC Role / Device Role / Timing Role: Supplies clean, low-leakage bias to high-impedance sensor nodes where IR < 1 μA prevents signal corruption. Use Value: Sub-microamp reverse leakage preserves nanoamp-level photocurrent integrity and dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | Zener voltage 18.0 V ±5%, rd = 40 Ω, Pd = 300 mW, SOT-23 package | Higher dynamic resistance and lower power rating; surface-mount only | Select when board space is constrained and 40 Ω impedance is acceptable for less demanding references |
| 1N4746A | Zener voltage 18 V ±5%, rd = 20 Ω, Pd = 1 W, DO-41 package | Higher power but higher noise and larger footprint; no low-noise specification | Choose for high-power clamping where noise is secondary to surge handling |
Compared with BZX84-C18LT1G and 1N4746A, the HZ18-1RE-E offers superior noise performance and tighter voltage tolerance in a DO-35 package, making it optimal for precision analog references where spectral purity and thermal stability outweigh raw power or miniaturization needs.
Availability
HZ18-1RE-E is available at Aetrix Electronics and suitable for precision instrumentation, medical sensor biasing, and industrial power supply regulation requiring stable component supply, long-term lifecycle continuity, and traceable sourcing.
Supply support for HZ18-1RE-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, and power devices, with strong heritage in industrial and automotive electronics.
The HZ-L Series was designed specifically for low-noise voltage reference applications in analog signal chains, emphasizing reduced diode noise, tight zener voltage tolerance, and stable temperature coefficients across a wide voltage range.
FAQ
What is the exact zener voltage range for HZ18-1RE-E?
The HZ18-1RE-E has a guaranteed zener voltage range of 16.9 V minimum to 17.7 V maximum when tested at IZ = 0.5 mA and Ta = 25°C. This 0.8 V span reflects the device's grade tolerance and is documented in the Renesas REJ03G0182-0300 datasheet on page 3. The nominal value is 17.3 V, and the HZ18-1RE-E is part of the HZ-L series' "-1" variant group covering the lower end of each voltage bin.
Does HZ18-1RE-E have a specified noise performance metric?
Yes - the HZ18-1RE-E datasheet states that the HZ-L series exhibits diode noise approximately 1/3 to 1/10 lower than the standard HZ series. While no quantitative spectral noise density (e.g., nV/√Hz) is published, this comparative claim is validated across the full HZ-L family including HZ18-1RE-E and is tied to optimized planar junction processing and low dynamic resistance (15.0 Ω).
What is the maximum allowable reverse current for HZ18-1RE-E at 15 V?
The HZ18-1RE-E specifies a maximum reverse current (IR) of 1 μA when reverse voltage (VR) is applied at 15.0 V, per the Electrical Characteristics table on page 2 of the REJ03G0182-0300 datasheet. This low leakage supports high-impedance reference designs and minimizes error in precision bias networks.
Is HZ18-1RE-E compatible with DO-35 socket footprints?
Yes - the HZ18-1RE-E uses the standard DO-35 package (RENESAS code GRZZ0002ZB-A, JEITA code DO-35), with body diameter 2.0 mm, length 26.0 mm, and lead spacing E = 4.2 mm. Its mechanical dimensions match industry-standard DO-35 sockets and wave-solder tooling, and the navy-blue cathode band aligns with conventional DO-35 polarity marking.
How does the temperature coefficient of HZ18-1RE-E affect long-term stability?
The HZ18-1RE-E has a zener voltage temperature coefficient (γZ) of −0.02 %/°C near its operating point, as shown in Figure 2 of the datasheet. Over a 50°C ambient shift (e.g., 25°C to 75°C), this results in ~−0.1% total VZ drift - equivalent to ~−17.5 mV for a 17.3 V nominal device - enabling predictable compensation in stable reference designs without active correction.
HZ18-1RE-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:
- -
HZ18-1RE-E FAQ
1.How can I place an order for HZ18-1RE-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ18-1RE-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 HZ18-1RE-E reliable?
The price and inventory of HZ18-1RE-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ18-1RE-E is usually 5 days.
3.What payment methods are accepted for HZ18-1RE-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ18-1RE-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ18-1RE-E?
HZ18-1RE-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ18-1RE-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 HZ18-1RE-E?
For technical support, including HZ18-1RE-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ18-1RE-E requirements.
6.How does Aetrix verify that HZ18-1RE-E is sourced from the original manufacturer or authorized distributors?
All HZ18-1RE-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 HZ18-1RE-E meets industry standards.
7.What is the process for return or replacement of HZ18-1RE-E?
All HZ18-1RE-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ18-1RE-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 HZ18-1RE-E part is unused and in its original packaging.
Return procedure for HZ18-1RE-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ18-1RE-E Tags
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