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Renesas HZ20-1L-E
- Part No.:
- HZ20-1L-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ20-1L-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,500
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Product details
Overview
HZ20-1L-E from Renesas is a silicon planar Zener diode engineered for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 19.25 V (min 18.8 V, max 19.7 V), 400 mW power dissipation, 18.0 Ω dynamic impedance at 0.5 mA test current, DO-35 glass package, and cathode band marking for polarity identification.
For engineers reviewing the HZ20-1L-E datasheet, HZ20-1L-E pinout, HZ20-1L-E application, or HZ20-1L-E equivalent, key selection criteria include zener voltage tolerance (±2.4%), temperature coefficient (−0.04 %/°C), low noise performance (1/3–1/10 of standard HZ series), and suitability for stabilized reference supplies in instrumentation and sensor signal conditioning.
Technical Context
The HZ20-1L-E operates as a two-terminal voltage reference device with DC-tested zener breakdown characteristics, optimized for low-noise operation via reduced junction area and planar process control. Its −0.04 %/°C temperature coefficient minimizes drift across −55°C to +175°C ambient range.
Designed for stable DC biasing and reference generation, it delivers 18.0 Ω dynamic resistance at 0.5 mA, supports ≤1 μA reverse leakage at VR = 15.0 V, and maintains thermal stability up to 175°C junction temperature - critical for high-reliability analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V min / 19.7 V max - defines precise DC reference level with ±2.4% tolerance at 0.5 mA |
| Power Dissipation (Pd) | 400 mW - enables stable operation without heatsinking in compact DO-35 PCB layouts |
| Dynamic Resistance (rd) | 18.0 Ω at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Temperature Coefficient (γZ) | −0.04 %/°C - provides predictable, low-drift behavior over industrial temperature range |
| Reverse Leakage (IR) | ≤1 μA at VR = 15.0 V - preserves accuracy in high-impedance reference networks |
| Junction Temperature (Tj) | 175°C maximum - supports operation in thermally constrained enclosures and automotive under-hood zones |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body color, navy blue cathode band, 2.0 mm diameter × 26.0 mm length, 0.13 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to higher potential node; marked by navy blue band for unambiguous polarity identification |
| 2 (Anode) | Reference ground terminal | Connected to circuit common; forms low-impedance return path for zener current |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - critical for audio preamps and precision ADC references |
| Stable voltage regulation | Low zener impedance (18.0 Ω) and tight VZ tolerance (±2.4%) ensure repeatable reference accuracy |
| Wide operating temperature range | Functional from −55°C to +175°C junction temperature - suitable for industrial and automotive environments |
| High reliability construction | Silicon planar process with glass passivation - delivers low leakage (≤1 μA) and long-term parameter stability |
Applications
| Instrumentation Reference | Audio Signal Conditioning |
|---|---|
Use Scenario: Precision voltage reference in 16-bit data acquisition systems requiring sub-0.1% drift over temperature. IC Role / Device Role / Timing Role: Zener diode providing stable 19.25 V reference for op-amp biasing and ADC reference buffers. Use Value: Low dynamic resistance (18.0 Ω) and −0.04 %/°C TC minimize measurement error across −40°C to +85°C operating range. |
Use Scenario: DC bias stabilization in high-fidelity microphone preamplifier stages where supply ripple must be suppressed below 10 µV RMS. IC Role / Device Role / Timing Role: Low-noise zener shunt regulator maintaining clean ±15 V rails for JFET-input op-amps. Use Value: Noise reduction to 1/10 of standard HZ series directly improves SNR in analog signal paths. |
| Sensor Excitation Circuit | Industrial PLC Analog Input |
Use Scenario: Constant-current excitation source for strain gauge bridges in load cell interfaces exposed to wide ambient swings. IC Role / Device Role / Timing Role: Zener-regulated current mirror reference enabling <10 ppm/°C excitation stability. Use Value: Tight VZ tolerance (±2.4%) and low TC (−0.04 %/°C) reduce bridge offset drift to <0.05% FS over temperature. |
Use Scenario: Isolated reference generation in 4–20 mA transmitter modules requiring long-term calibration stability. IC Role / Device Role / Timing Role: Primary voltage reference for DAC output scaling and loop current regulation circuitry. Use Value: 400 mW power rating allows robust operation under transient overvoltage conditions without derating. |
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 | Zener voltage 18 V ±5%, rd = 21 Ω, Pd = 1 W, DO-41 package | Higher power but looser tolerance and higher noise than HZ20-1L-E | Select when higher power margin is required and ±5% VZ tolerance is acceptable |
| BZX85C18 | Zener voltage 18 V ±5%, rd = 25 Ω, Pd = 1.3 W, DO-41 package | Higher power and larger footprint; lacks low-noise optimization and tight TC | Choose for cost-sensitive industrial controls where noise and drift are secondary to power handling |
Compared with 1N4746A and BZX85C18, the HZ20-1L-E offers superior voltage accuracy (±2.4% vs. ±5%), lower noise, and tighter temperature coefficient (−0.04 %/°C vs. typical −0.08 %/°C), making it optimal for precision analog systems despite its lower 400 mW rating.
Availability
HZ20-1L-E is available at Aetrix Electronics and suitable for precision instrumentation, audio signal conditioning, sensor excitation circuits, and industrial PLC analog input modules requiring stable component supply with guaranteed long-term continuity.
Supply support for HZ20-1L-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 leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZ-L Series is part of Renesas' precision analog portfolio, designed specifically for low-noise, high-stability voltage reference applications in measurement, sensing, and signal conditioning systems.
FAQ
What is the exact zener voltage range for HZ20-1L-E?
The HZ20-1L-E has a specified zener voltage range of 18.8 V minimum to 19.7 V maximum at 0.5 mA test current, yielding a nominal value of 19.25 V with ±2.4% tolerance. This range is verified per Renesas datasheet REJ03G0182-0300 Rev.3.00 and applies strictly to the HZ20-1L-E variant within the HZ-L family.
Does HZ20-1L-E support high-temperature operation?
Yes, the HZ20-1L-E is rated for junction temperatures up to 175°C and storage temperatures from −55°C to +175°C. Its silicon planar construction and glass DO-35 package enable reliable operation in automotive under-hood and industrial control environments where thermal stress is significant - confirmed in Absolute Maximum Ratings on page 2 of the HZ20-1L-E datasheet.
How does the noise performance of HZ20-1L-E compare to standard zener diodes?
The HZ20-1L-E delivers approximately 1/3 to 1/10 the noise level of conventional HZ-series zeners due to optimized planar junction design and process control. This low-noise characteristic is explicitly documented in the Features section of the HZ-L Series datasheet and makes the HZ20-1L-E especially valuable in audio preamplifiers and precision ADC reference circuits.
What is the dynamic resistance of HZ20-1L-E and why does it matter?
The HZ20-1L-E exhibits 18.0 Ω dynamic resistance at 0.5 mA zener current. This low rd value ensures minimal output voltage variation during load or supply fluctuations - essential for maintaining reference stability in high-gain analog stages and precision sensor interfaces where even millivolt-level shifts degrade system accuracy.
Is HZ20-1L-E compatible with automated PCB assembly processes?
Yes, the HZ20-1L-E uses the standard DO-35 axial glass package (JEITA code GRZZ0002ZB-A) with 2.0 mm diameter and 26.0 mm length, fully compatible with wave soldering, reflow-compatible lead tinning, and pick-and-place feeders using standard axial tape-and-reel carriers. Its orange body and navy blue cathode band support optical polarity verification during AOI inspection.
HZ20-1L-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:
- -
HZ20-1L-E FAQ
1.How can I place an order for HZ20-1L-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ20-1L-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 HZ20-1L-E reliable?
The price and inventory of HZ20-1L-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ20-1L-E is usually 5 days.
3.What payment methods are accepted for HZ20-1L-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ20-1L-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ20-1L-E?
HZ20-1L-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ20-1L-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 HZ20-1L-E?
For technical support, including HZ20-1L-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ20-1L-E requirements.
6.How does Aetrix verify that HZ20-1L-E is sourced from the original manufacturer or authorized distributors?
All HZ20-1L-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 HZ20-1L-E meets industry standards.
7.What is the process for return or replacement of HZ20-1L-E?
All HZ20-1L-E units undergo pre-shipment inspection (PSI). If there is an issue with HZ20-1L-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 HZ20-1L-E part is unused and in its original packaging.
Return procedure for HZ20-1L-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ20-1L-E Tags
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