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Renesas HZS20-3TD-E
- Part No.:
- HZS20-3TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS20-3TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS20-3TD-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 the MHD package. It operates across −55°C to +175°C storage temperature range and supports high-speed automatic insertion on 5 mm-pitch PCBs.
For engineers reviewing the HZS20-3TD-E datasheet, HZS20-3TD-E pinout, HZS20-3TD-E application, or HZS20-3TD-E equivalent, key selection criteria include its tight zener voltage tolerance (±0.9 V), low leakage current (<1 µA at VR = 15 V), temperature coefficient behavior near zero crossing (~−0.02 %/°C), suitability for industrial-grade power rail clamping, and compatibility with standard through-hole assembly processes.
Technical Context
The HZS20-3TD-E employs a silicon planar junction structure optimized for stable reverse-bias breakdown with minimal voltage drift over temperature and time. Its zener voltage is specified at 2 mA, and dynamic resistance is measured under the same DC condition, ensuring predictable regulation performance in low-current reference and protection circuits.
This device exhibits a negative temperature coefficient near 20 V (≈ −0.02 %/°C), placing it close to the zero-TC crossover point typical of mid-voltage Zeners. Its 400 mW power rating and 200°C junction temperature limit support operation in compact, thermally constrained designs without forced cooling.
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 20 V rail stabilization |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 2 mA - ensures low output impedance and minimal load-induced voltage shift |
| Power Dissipation (Pd) | 400 mW - enables use in space-constrained PCB layouts without heatsinking |
| Reverse Leakage (IR) | <1 µA at VR = 15 V - minimizes standby current loss in battery-backed or low-power systems |
| Junction Temperature (Tj) | 200°C - supports reliable operation in high-ambient industrial environments |
| Storage Temperature | −55°C to +175°C - compatible with extended-range automotive and industrial reflow/reflow-compatible handling |
| Package | MHD (JEITA GRZZ0002ZC-A) - standardized 5 mm-pitch through-hole package for automated insertion |
Pinout & Package
The HZS20-3TD-E is housed in the MHD package - a leaded, axial-lead silicon planar diode package with cathode band marking, compliant with JEITA code GRZZ0002ZC-A and optimized for 5 mm-pitch high-speed automatic insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Breakdown Anode Terminal | Connected to regulated positive rail; reverse-biased operation requires this terminal at higher potential than anode |
| 2 (Anode) | Reference Ground Terminal | Typically tied to circuit ground or lower-potential node; establishes reference point for zener conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Low Zener Impedance | 60 Ω max ensures <±10 mV output variation under ±0.5 mA load change at 20 V |
| Wide Zener Voltage Range Coverage | Part of HZS Series spanning 1.6–38 V - enables single-supplier sourcing across multiple voltage rails |
| High-Temperature Stability | 200°C max junction temperature supports operation in sealed enclosures or near heat-generating components |
| Automated Assembly Compatibility | MHD package with 5 mm pitch meets IPC-7351 requirements for high-yield, high-speed through-hole placement |
| Low Leakage Performance | <1 µA reverse current at 15 V allows use in ultra-low-power monitoring circuits without signal corruption |
Applications
| Voltage Reference for Analog Sensors | Overvoltage Clamp in Industrial IO Modules |
|---|---|
Use Scenario: Providing stable 20 V reference for 16-bit ADC biasing in temperature and pressure transmitters. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to generate fixed reference voltage independent of supply ripple. Use Value: Enables ±0.05% full-scale accuracy by minimizing reference drift across −40°C to +85°C ambient range. |
Use Scenario: Protecting 24 V PLC input circuitry against transient surges from inductive load switching. IC Role / Device Role / Timing Role: Shunt clamp limiting input voltage to ≤21.1 V during ESD or inductive kick events. Use Value: Prevents damage to downstream optocouplers and level-shifters while maintaining <1 µA quiescent leakage during normal operation. |
| Low-Power Backup Supply Regulation | Microcontroller Reset Circuit Threshold |
Use Scenario: Regulating coin-cell-powered real-time clock (RTC) backup voltage in energy-metering meters. IC Role / Device Role / Timing Role: Zener-based shunt regulator maintaining 20 V rail for RTC supervisor IC requiring stable VDD. Use Value: Delivers consistent 20 V output with <200 nA total current draw at 15 V input, extending battery life beyond 10 years. |
Use Scenario: Setting precise brown-out detection threshold for 32-bit ARM Cortex-M microcontrollers in motor drives. IC Role / Device Role / Timing Role: Voltage divider element establishing 20 V trigger point for external reset supervisor IC. Use Value: Achieves ±0.5 V trip-point accuracy across production lots, eliminating false resets during line dips. |
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 |
|---|---|---|---|
| 1N4744A (ON Semiconductor) | 20 V nominal, ±5% tolerance (19–21 V), 50 Ω rd, DO-41 package | Higher voltage tolerance band; less precise for tight-regulation needs | Preferred where cost sensitivity outweighs ±0.9 V spec compliance and DO-41 footprint is acceptable |
| BZX55C20 (Vishay) | 20 V nominal, ±5% tolerance, 70 Ω rd, DO-35 package, 500 mW rating | Higher power rating but larger dynamic resistance; different thermal profile | Selected when higher surge energy absorption is required and MHD's 5 mm pitch is not mandatory |
Compared with 1N4744A and BZX55C20, the HZS20-3TD-E offers tighter voltage tolerance (±0.9 V vs. ±1 V), lower leakage, and MHD packaging optimized for automated insertion-making it preferable for high-reliability industrial power monitoring where precision and assembly efficiency are jointly critical.
Availability
HZS20-3TD-E is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and programmable logic controller (PLC) input protection circuits requiring stable component supply, long-term lifecycle continuity, and RoHS-compliant sourcing.
Supply support for HZS20-3TD-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 Series was developed by Renesas Electronics as a family of precision silicon planar Zener diodes targeting stabilized DC power supply design, offering tight voltage tolerances, low dynamic impedance, and high-temperature reliability for industrial control and instrumentation applications.
FAQ
What is the exact zener voltage range for HZS20-3TD-E at 2 mA test current?
The HZS20-3TD-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, per Renesas datasheet REJ03G0184-0500 Rev.5.00. This ±0.45 V tolerance reflects tighter specification than standard 5% Zeners and supports high-accuracy voltage referencing in HZS20-3TD-E applications.
Does HZS20-3TD-E support surface-mount assembly?
No, the HZS20-3TD-E uses the MHD package - a through-hole, axial-leaded configuration with 5 mm lead pitch, explicitly designed for high-speed automatic insertion, not SMT reflow. It is incompatible with pick-and-place or reflow soldering processes. For SMT alternatives, consult Renesas' HZS series SMD variants such as HZS20-3TR-E.
What is the maximum reverse leakage current for HZS20-3TD-E at 15 V?
The maximum reverse leakage current for HZS20-3TD-E is 1 µA at VR = 15 V and Ta = 25°C, as specified in the Electrical Characteristics table on page 4 of the official Renesas datasheet. This low leakage ensures minimal parasitic loading in high-impedance reference or monitoring circuits using HZS20-3TD-E.
Is HZS20-3TD-E rated for automotive applications?
No, the HZS20-3TD-E is classified as a "Standard" quality grade device per Renesas' quality grading system (REJ03G0184-0500, p.1), intended for office equipment, industrial robots, and test instrumentation-not automotive or safety-critical systems. It lacks AEC-Q200 qualification and is not recommended for under-hood or chassis-control use without additional validation.
What is the thermal resistance junction-to-ambient for HZS20-3TD-E?
The datasheet does not specify a numerical junction-to-ambient thermal resistance (RθJA) for HZS20-3TD-E. Instead, Renesas provides the derating curve in Figure 3 (Page 5), showing linear power dissipation reduction from 400 mW at 25°C ambient to 0 mW at ~150°C. Designers must apply this curve directly when calculating safe operating area for HZS20-3TD-E in enclosed or elevated-temperature environments.
HZS20-3TD-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:
- -
HZS20-3TD-E FAQ
1.How can I place an order for HZS20-3TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS20-3TD-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 HZS20-3TD-E reliable?
The price and inventory of HZS20-3TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS20-3TD-E is usually 5 days.
3.What payment methods are accepted for HZS20-3TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS20-3TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS20-3TD-E?
HZS20-3TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS20-3TD-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 HZS20-3TD-E?
For technical support, including HZS20-3TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS20-3TD-E requirements.
6.How does Aetrix verify that HZS20-3TD-E is sourced from the original manufacturer or authorized distributors?
All HZS20-3TD-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 HZS20-3TD-E meets industry standards.
7.What is the process for return or replacement of HZS20-3TD-E?
All HZS20-3TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS20-3TD-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 HZS20-3TD-E part is unused and in its original packaging.
Return procedure for HZS20-3TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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