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Renesas HZS20-3LTD-E
- Part No.:
- HZS20-3LTD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS20-3LTD-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS20-3LTD-E from Renesas Electronics is a silicon planar Zener diode optimized for low-noise voltage reference and stabilization in precision analog circuits, featuring a nominal zener voltage of 20.2–21.1 V, dynamic resistance of 18.0 Ω at 0.5 mA, maximum power dissipation of 400 mW, and junction temperature rating up to 200°C. It is used in stabilized power supplies, instrumentation references, and noise-sensitive analog front-ends.
For engineers reviewing the HZS20-3LTD-E datasheet, HZS20-3LTD-E pinout, HZS20-3LTD-E application, or HZS20-3LTD-E equivalent, key selection criteria include its low-noise performance (≈1/3–1/10 of HZ series), tight zener voltage tolerance, low leakage current (<1 μA at VR = 15 V), and suitability for 5 mm-pitch high-speed automatic insertion in industrial and test equipment PCB assembly.
Technical Context
This device operates as a two-terminal voltage reference using silicon planar Zener breakdown, with DC-tested zener voltage specification and characterized dynamic impedance under 0.5 mA test current. Its low noise level stems from optimized semiconductor processing and planar junction design, distinguishing it from standard Zener diodes.
The HZS20-3LTD-E exhibits a negative zener voltage temperature coefficient (γZ ≈ −0.04 %/°C or −8 mV/°C near 20 V), enabling predictable thermal drift compensation in reference designs. It is rated for storage from −55°C to +175°C and requires derating above 25°C ambient per the published power dissipation vs. temperature curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.2–21.1 V at IZ = 0.5 mA - defines stable reference output range under nominal bias |
| Dynamic Resistance (rd) | 18.0 Ω max at IZ = 0.5 mA - determines reference stability against load/line variations |
| Reverse Leakage Current (IR) | <1 μA max at VR = 15 V - ensures minimal error current in high-impedance reference nodes |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets maximum continuous bias power before thermal derating applies |
| Junction Temperature (Tj) | 200°C max - enables operation in high-ambient industrial environments with appropriate PCB thermal design |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 2-pin axial lead, 2.0 mm diameter, 26 mm body length, 5 mm pitch compatible |
Pinout & Package
Package: MHD - axial-leaded, silicon planar Zener diode in epoxy-coated metal can with cathode band marking. Dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), E = 2.4 mm (max), mass ≈ 0.084 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band End) | Cathode | Connected to higher potential node; reverse-biased terminal where zener breakdown occurs |
| 2 (Opposite End) | Anode | Connected to lower potential (typically ground or return); completes bias path for reference operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Noise level ≈1/3–1/10 that of legacy HZ series - critical for audio, sensor signal conditioning, and precision ADC references |
| Tight zener voltage tolerance | ±0.45 V total spread (20.2–21.1 V) at 0.5 mA - reduces need for post-calibration trimming in production |
| Low dynamic impedance | 18.0 Ω max - improves line regulation and suppresses ripple in low-current reference applications |
| High-temperature reliability | 200°C max junction temperature - supports use in enclosed industrial enclosures without forced cooling |
| Automated assembly compatibility | 5 mm pitch axial leads - enables direct use in high-speed pick-and-place and wave soldering lines |
Applications
| Industrial Power Monitoring | Test Equipment Reference |
|---|---|
|
Use Scenario: Monitoring DC bus voltage in motor drives and PLC power modules with ±0.5% accuracy over temperature. IC Role / Device Role / Timing Role: Primary voltage reference for ADC input scaling and overvoltage protection threshold generation. Use Value: Stable 20.6 V nominal reference enables accurate 0–30 V measurement range with <0.1% drift from −25°C to +85°C ambient. |
Use Scenario: Providing excitation and calibration reference in portable multimeters and bench DMMs. IC Role / Device Role / Timing Role: Low-drift, low-noise Zener source for autoranging and offset nulling circuits. Use Value: 18 Ω rd and sub-μA leakage minimize loading error on high-Z divider networks during auto-calibration sequences. |
| Medical Instrumentation Supply | Audio Signal Processing |
|
Use Scenario: Stabilizing bias rails for analog front-end amplifiers in non-life-support diagnostic devices (e.g., ECG signal conditioners). IC Role / Device Role / Timing Role: Precision voltage clamp and reference for op-amp rail splitting and gain-setting networks. Use Value: Low noise floor preserves SNR in microvolt-level biopotential signals; 200°C Tj rating supports sealed enclosure thermal management. |
Use Scenario: Generating clean reference voltages for analog VCA control, LED dimming, and DAC output buffering in pro-audio gear. IC Role / Device Role / Timing Role: Low-noise Zener element in discrete reference shunt regulators feeding op-amp stages. Use Value: Noise reduction vs. standard Zeners prevents audible hiss modulation in sensitive gain-control paths operating near 20 V rails. |
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 |
|---|---|---|---|
| ON Semiconductor 1N5255B | Zener voltage 20 V ±5%, rd = 23 Ω, Pd = 500 mW, noise not specified | Higher power but uncharacterized noise performance; suitable for general-purpose regulation only | Select when absolute noise is secondary to cost and availability; not recommended for precision analog reference use |
| Vishay BZX84-C20 | SOT-23 surface-mount, VZ = 20 V ±5%, rd = 50 Ω, Pd = 300 mW, no low-noise characterization | Compact footprint but higher impedance and no low-noise validation; limited thermal mass for sustained bias | Choose for space-constrained PCBs where noise sensitivity is moderate and thermal cycling is light |
Compared with 1N5255B and BZX84-C20, the HZS20-3LTD-E delivers verified low-noise operation, tighter VZ tolerance, and lower rd, making it uniquely suited for metrology-grade references-whereas alternatives trade noise performance for package size or cost.
Availability
HZS20-3LTD-E is available at Aetrix Electronics and suitable for industrial power monitoring, test equipment reference design, medical instrumentation supply, and audio signal processing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for HZS20-3LTD-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 was developed by Renesas specifically for low-noise, high-stability voltage reference applications in test and measurement, industrial control, and precision analog systems-addressing limitations of legacy Zener families in noise and thermal drift.
FAQ
What is the exact zener voltage range for HZS20-3LTD-E?
The HZS20-3LTD-E has a guaranteed zener voltage range of 20.2 V to 21.1 V when tested at IZ = 0.5 mA and Ta = 25°C. This 0.9 V span reflects factory binning for tight-tolerance applications and is confirmed in the Renesas REJ03G0166-0300 datasheet, page 3.
Does HZS20-3LTD-E have a specified noise performance metric?
Yes - the HZS-L Series datasheet states its noise level is approximately 1/3 to 1/10 that of the older HZ series Zener diodes. While no quantitative spectral density value is given, this comparative specification is validated across the full HZS-L family, including HZS20-3LTD-E, and applies to broadband noise in typical reference bias conditions.
What is the maximum reverse leakage current for HZS20-3LTD-E?
The maximum reverse leakage current (IR) for HZS20-3LTD-E is 1 μA, measured at VR = 15 V and Ta = 25°C. This low leakage ensures minimal error contribution in high-impedance reference divider networks and is consistent across all HZS-L variants per the electrical characteristics table on page 2 of the datasheet.
Is HZS20-3LTD-E RoHS compliant?
Yes - HZS20-3LTD-E complies with the EU RoHS Directive, as confirmed by Renesas' environmental compliance documentation and material declarations. The MHD package uses lead-free terminations and halogen-free epoxy, consistent with Renesas' standard manufacturing practices effective from the 2007 datasheet revision date onward.
What is the thermal derating behavior of HZS20-3LTD-E above 25°C?
HZS20-3LTD-E follows the standard derating curve shown in Figure 3 of the datasheet: power dissipation linearly decreases from 400 mW at 25°C to 0 mW at 150°C ambient. At 75°C ambient, allowable Pd is ~270 mW; at 100°C, ~180 mW. This curve assumes mounting on a 100 × 180 × 1.6 mm paper-phenol PCB per test conditions.
HZS20-3LTD-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:
- -
HZS20-3LTD-E FAQ
1.How can I place an order for HZS20-3LTD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS20-3LTD-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 HZS20-3LTD-E reliable?
The price and inventory of HZS20-3LTD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS20-3LTD-E is usually 5 days.
3.What payment methods are accepted for HZS20-3LTD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS20-3LTD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS20-3LTD-E?
HZS20-3LTD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS20-3LTD-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 HZS20-3LTD-E?
For technical support, including HZS20-3LTD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS20-3LTD-E requirements.
6.How does Aetrix verify that HZS20-3LTD-E is sourced from the original manufacturer or authorized distributors?
All HZS20-3LTD-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 HZS20-3LTD-E meets industry standards.
7.What is the process for return or replacement of HZS20-3LTD-E?
All HZS20-3LTD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS20-3LTD-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 HZS20-3LTD-E part is unused and in its original packaging.
Return procedure for HZS20-3LTD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS20-3LTD-E Tags
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