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Renesas HZS20-1TD-E
- Part No.:
- HZS20-1TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS20-1TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:25,000
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Product details
Overview
HZS20-1TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies, with a nominal zener voltage of 20.2–21.1 V at 2 mA test current, 60 Ω dynamic resistance, and 400 mW maximum power dissipation in MHD package. It operates across −55°C to +175°C storage range and supports high-speed automatic insertion on 5 mm-pitch PCBs.
For engineers reviewing the HZS20-1TD-E datasheet, HZS20-1TD-E pinout, HZS20-1TD-E application, or HZS20-1TD-E equivalent, this device serves as a stable reference in analog sensing front-ends, industrial sensor biasing, and low-current voltage clamp circuits where tight tolerance and low temperature drift are required.
Technical Context
The HZS20-1TD-E employs a silicon planar junction structure optimized for low leakage and predictable reverse breakdown behavior under DC conditions. Its zener voltage is specified at 2 mA test current, with dynamic resistance measured at the same condition to ensure consistent regulation performance across operating loads.
Designed for surface-mount compatibility in MHD (miniature hermetic diode) package, it features a cathode band marking and two-terminal configuration. The device exhibits a negative zener voltage temperature coefficient near −15 mV/°C - typical for ~20 V Zeners - enabling predictable thermal compensation in reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20.2–21.1 V at IZ = 2 mA - defines precise clamping threshold for overvoltage protection or reference generation |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 2 mA - ensures minimal output voltage variation under load changes |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - sets thermal design limit for PCB trace width and copper area |
| Reverse Current (IR) | 1 µA max at VR = 15 V - guarantees low standby leakage in battery-powered monitoring circuits |
| Junction Temperature (Tj) | 200°C max - allows operation in high-ambient industrial environments with appropriate derating |
| Storage Temperature | −55°C to +175°C - supports use in automotive under-hood or industrial outdoor enclosures |
Pinout & Package
The HZS20-1TD-E is housed in the MHD (Miniature Hermetic Diode) package - a radial leaded, glass-encapsulated, 2.0 mm diameter × 26 mm length axial package with lake-blue cathode band marking and 5 mm pitch compatibility for automated insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side terminal of reverse-biased junction | Connected to regulated positive rail; polarity-sensitive for correct clamping orientation |
| 2 (Anode) | Low-side terminal of reverse-biased junction | Typically tied to ground or lower potential node; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 60 Ω max enables stable regulation under varying load currents without external buffering |
| Wide zener voltage spectrum | 20.2–21.1 V range supports accurate mid-range voltage references in 24 V system rails |
| High reliability planar construction | Si planar junction ensures repeatable breakdown characteristics and long-term parameter stability |
| Automated insertion compatibility | 5 mm pitch and standardized MHD dimensions allow direct integration into high-volume SMT/reflow-compatible assembly lines |
Applications
| Industrial Sensor Biasing | Low-Power Reference Supply |
|---|---|
|
Use Scenario: Providing stable excitation voltage to resistive temperature detectors (RTDs) or strain gauges in factory-floor measurement modules. IC Role / Device Role / Timing Role: Zener diode acting as two-terminal shunt voltage reference, absorbing excess current to maintain fixed node voltage. Use Value: Delivers ±0.45 V tolerance over 20.2–21.1 V range at 2 mA, minimizing gain error in analog signal chains without active regulation. |
Use Scenario: Generating clean 20 V reference for ADC input scaling in portable data loggers powered by Li-ion batteries. IC Role / Device Role / Timing Role: Passive voltage clamp regulating supply to precision analog front-end ICs during battery discharge cycles. Use Value: Maintains reference accuracy within 1% over −40°C to +85°C ambient due to predictable temperature coefficient and low rd. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
|
Use Scenario: Protecting 24 V I/O pins of PLC modules against transient surges from inductive load switching. IC Role / Device Role / Timing Role: Shunt limiter diverting surge energy to ground when line voltage exceeds 21.1 V. Use Value: Responds in nanoseconds with 60 Ω impedance to clamp spikes while surviving 400 mW peak dissipation per JEDEC stress profiles. |
Use Scenario: Holding microcontroller reset pin low until 20 V rail stabilizes during power-up in embedded motor controllers. IC Role / Device Role / Timing Role: Threshold detector using zener conduction to enable reset release only after regulated voltage reaches specification. Use Value: Enables deterministic reset timing with <1 µA leakage below 15 V, preventing premature MCU wake-up during brown-out conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A (ON Semiconductor) | 20 V nominal, 5% tolerance (19–21 V), 22 Ω rd, DO-41 package | Lower impedance but wider tolerance; requires manual placement or different feeder setup | Preferred where tighter dynamic regulation is critical and through-hole assembly is acceptable |
| BZX84-C20 (Diodes Inc.) | 20 V nominal, 5% tolerance, 50 Ω rd, SOT-23 package | SMT-only, smaller footprint, lower Pd (300 mW), higher thermal resistance | Selected for space-constrained PCBs where 200 mW continuous dissipation suffices |
Compared with 1N4744A and BZX84-C20, the HZS20-1TD-E offers tighter voltage grading (±0.45 V vs. ±1 V), higher power rating (400 mW), and MHD package compatibility with legacy 5 mm-pitch insertion equipment - making it optimal for industrial control systems requiring field-proven reliability and automated manufacturing alignment.
Availability
HZS20-1TD-E is available at Aetrix Electronics and suitable for industrial sensor biasing, low-power reference supplies, and overvoltage clamp protection requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for HZS20-1TD-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 delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT applications.
The HZS Series is part of Renesas' discrete diode portfolio, engineered specifically for high-stability voltage reference and regulation in industrial power management and sensing systems.
FAQ
What is the exact zener voltage range for HZS20-1TD-E?
The HZS20-1TD-E has a guaranteed zener voltage range of 20.2 V to 21.1 V when tested at IZ = 2 mA and Ta = 25°C. This 0.9 V span reflects its "-2" grade designation within the HZS20 family and ensures predictable clamping behavior in precision analog circuits without requiring post-manufacturing sorting.
Is HZS20-1TD-E compatible with automated 5 mm-pitch insertion equipment?
Yes, the HZS20-1TD-E uses the MHD package with standardized 5 mm lead pitch and lake-blue cathode band marking, explicitly designed for compatibility with high-speed automatic insertion machines. Its 26 mm body length and 2.0 mm diameter meet GRZZ0002ZC-A mechanical specifications for reliable feed and placement.
What is the maximum power dissipation of HZS20-1TD-E and how does it derate with temperature?
HZS20-1TD-E has a maximum power dissipation of 400 mW at 25°C ambient. Derating follows a linear slope of approximately 3.2 mW/°C above 25°C, reaching zero dissipation at ~150°C ambient - consistent with its 200°C junction limit and thermal resistance profile shown in Figure 3 of the datasheet.
Does HZS20-1TD-E have a specified temperature coefficient, and what is its impact on circuit design?
While not individually specified per unit, the HZS20 series exhibits a typical zener voltage temperature coefficient of −15 mV/°C (or ~−0.075%/°C) near 20 V, as shown in Figure 2 of the datasheet. Designers should account for this negative drift in wide-temperature applications by including compensating components or selecting complementary reference topologies.
Can HZS20-1TD-E be used in safety-critical medical or aerospace systems?
No. Per Renesas documentation, the HZS20-1TD-E is classified as a "Standard" quality grade device intended for industrial, office, and consumer equipment - not for life-support, aerospace, nuclear, or other "Specific" applications. Its qualification excludes radiation hardening, extended reliability testing, or safety certification required for such domains.
HZS20-1TD-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:
- -
HZS20-1TD-E FAQ
1.How can I place an order for HZS20-1TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS20-1TD-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 HZS20-1TD-E reliable?
The price and inventory of HZS20-1TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS20-1TD-E is usually 5 days.
3.What payment methods are accepted for HZS20-1TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS20-1TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS20-1TD-E?
HZS20-1TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS20-1TD-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 HZS20-1TD-E?
For technical support, including HZS20-1TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS20-1TD-E requirements.
6.How does Aetrix verify that HZS20-1TD-E is sourced from the original manufacturer or authorized distributors?
All HZS20-1TD-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 HZS20-1TD-E meets industry standards.
7.What is the process for return or replacement of HZS20-1TD-E?
All HZS20-1TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS20-1TD-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 HZS20-1TD-E part is unused and in its original packaging.
Return procedure for HZS20-1TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS20-1TD-E Tags
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