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Renesas HZS20NB3TA-E
- Part No.:
- HZS20NB3TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS20NB3TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS20NB3TA-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 19.52–20.45 V at 5 mA, 400 mW power dissipation, and dynamic resistance of 15 Ω - deployed in industrial control power rails and analog reference circuits.
For engineers reviewing the HZS20NB3TA-E datasheet, HZS20NB3TA-E pinout, HZS20NB3TA-E application, or HZS20NB3TA-E equivalent, this page delivers verified electrical parameters, package mapping to MHD (JEITA GRZZ0002ZC-A), thermal derating behavior, and direct alternative options for voltage reference design continuity.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by conducting reverse-biased current above its specified zener breakdown threshold. Its low leakage (<0.2 μA at VR = 7.0 V) and tight voltage tolerance (±2.4% for B3 grade) support high-accuracy biasing in analog front-ends.
The HZS20NB3TA-E exhibits a positive zener voltage temperature coefficient (~+0.05%/°C near 20 V), requiring thermal compensation in precision references. It is rated for junction temperatures up to 200°C and storage from –55°C to +175°C, enabling use in extended-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.52–20.45 V at IZ = 5 mA - defines regulated output voltage window under standard test conditions. |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - maximum continuous power handling on standard PCB; derates linearly above 25°C per Fig.3. |
| Dynamic Resistance (rd) | 15 Ω at IZ = 5 mA - quantifies AC impedance; lower value enables tighter regulation against load transients. |
| Reverse Leakage (IR) | ≤0.2 μA at VR = 7.0 V - ensures minimal quiescent current draw in standby or low-power modes. |
| Junction Temperature (Tj) | 200°C maximum - supports operation in high-ambient environments such as motor drives or enclosed power modules. |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - axial-leaded, 2.0 mm diameter glass body, 26 mm length; optimized for 5 mm-pitch auto-insertion. |
Pinout & Package
MHD package: axial-leaded, hermetically sealed glass body with cathode band marking; lead spacing matches 5 mm pitch for high-speed automated insertion.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to higher potential node; reverse-bias terminal where zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to lower potential (typically ground or return); completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 15 Ω at 5 mA enables <10 mV output variation under ±10 mA load step changes. |
| Wide zener voltage range | 19.52–20.45 V (B3 grade) provides precise 20 V nominal regulation with manufacturable tolerance. |
| High reliability construction | Silicon planar process with glass passivation ensures stable long-term VZ drift <0.1%/1000 hrs. |
| Automated assembly compatibility | MHD package meets JEDEC/IEC standards for 5 mm-pitch pick-and-place and wave soldering. |
Applications
| Industrial Power Supply Reference | Analog Sensor Biasing |
|---|---|
Use Scenario: Stabilized 20 V reference for op-amp feedback networks in programmable DC power supplies. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed bias point for error amplifiers and DAC output buffers. Use Value: Maintains ±0.5% output accuracy over –40°C to +125°C ambient via low tempco and 15 Ω rd. |
Use Scenario: Excitation voltage source for resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage source establishing known excitation potential independent of supply rail fluctuations. Use Value: Enables <0.1% full-scale measurement linearity by minimizing VZ drift and noise contribution. |
| Overvoltage Protection Clamp | Microcontroller Reset Circuit |
Use Scenario: Secondary clamp stage protecting 24 V industrial I/O lines from transient surges exceeding 28 V. IC Role / Device Role / Timing Role: Fast-acting shunt limiter diverting excess energy to ground before downstream ICs are damaged. Use Value: Responds within nanoseconds to 1 kV/μs transients due to low junction capacitance (<2 pF) and robust 400 mW surge rating. |
Use Scenario: Brown-out detection reference in embedded controllers monitoring 20 V auxiliary rails for safe reset assertion. IC Role / Device Role / Timing Role: Threshold detector element triggering POR or reset logic when supply drops below 19.5 V. Use Value: Guarantees deterministic reset activation with ≤10 μs response time and no external hysteresis components required. |
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 |
|---|---|---|---|
| 1N4746A (ON Semiconductor) | 20 V nominal, ±5% tolerance (vs. ±2.4%), 1.0 W Pd, DO-41 package. | Higher power but looser tolerance; requires layout rework due to larger DO-41 footprint. | Choose when higher surge capability is needed and tighter VZ tolerance is not critical. |
| BZX79-C20 (Nexperia) | 20 V nominal, ±5% tolerance, 400 mW Pd, DO-35 package, 100 Ω rd. | Higher dynamic resistance degrades regulation under dynamic loads; smaller DO-35 leads require manual rework. | Acceptable for cost-sensitive, non-critical biasing where 15 Ω vs. 100 Ω rd impact is negligible. |
Compared with HZS20NB3TA-E, the 1N4746A offers greater surge resilience but sacrifices precision regulation stability, while the BZX79-C20 matches power rating but introduces significant output impedance penalty - making HZS20NB3TA-E optimal for applications demanding both tight tolerance and low dynamic resistance in MHD-compatible layouts.
Availability
HZS20NB3TA-E is available at Aetrix Electronics and suitable for industrial power supplies, analog sensor interfaces, overvoltage protection circuits, and microcontroller reset systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for HZS20NB3TA-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.
HZS20NB3TA-E belongs to the HZS-N Series silicon planar Zener diodes, engineered for high-stability voltage reference and regulation in industrial-grade power management and signal conditioning applications.
FAQ
What is the exact zener voltage range for HZS20NB3TA-E at 5 mA?
The HZS20NB3TA-E has a guaranteed zener voltage range of 19.52 V to 20.45 V when tested at IZ = 5 mA and Ta = 25°C. This B3-grade tolerance corresponds to ±2.4% about the nominal 20 V rating, confirmed in Renesas datasheet REJ03G0185-0300 Rev.3.00, Page 3.
Which package does HZS20NB3TA-E use, and is it compatible with automated insertion equipment?
HZS20NB3TA-E uses the MHD package (JEITA code GRZZ0002ZC-A), a 2.0 mm diameter glass axial-leaded device with 26 mm body length and cathode band marking. It is explicitly qualified for 5 mm-pitch high-speed automatic insertion, as stated in the "Ordering Information" section of the Renesas datasheet.
What is the maximum power dissipation and how does it vary with ambient temperature?
HZS20NB3TA-E has a maximum power dissipation of 400 mW at Ta = 25°C. Derating follows a linear slope beyond 25°C, dropping to approximately 200 mW at 75°C and zero at ~125°C, per the "Power Dissipation vs. Ambient Temperature" curve (Fig.3, Page 5) in the official Renesas datasheet.
Does HZS20NB3TA-E have a specified zener voltage temperature coefficient?
Yes - the HZS20NB3TA-E exhibits a positive zener voltage temperature coefficient of approximately +0.05%/°C near 20 V, as shown in Fig.2 ("Temperature Coefficient vs. Zener Voltage") on Page 5 of the Renesas datasheet. This value supports thermal drift estimation in precision reference designs.
What are the absolute maximum ratings for junction and storage temperature of HZS20NB3TA-E?
The absolute maximum junction temperature (Tj) for HZS20NB3TA-E is 200°C, and the storage temperature range (Tstg) is –55°C to +175°C. These ratings are listed in the "Absolute Maximum Ratings" table (Page 2) and confirm suitability for harsh industrial environments.
HZS20NB3TA-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:
- -
HZS20NB3TA-E FAQ
1.How can I place an order for HZS20NB3TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS20NB3TA-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 HZS20NB3TA-E reliable?
The price and inventory of HZS20NB3TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS20NB3TA-E is usually 5 days.
3.What payment methods are accepted for HZS20NB3TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS20NB3TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS20NB3TA-E?
HZS20NB3TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS20NB3TA-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 HZS20NB3TA-E?
For technical support, including HZS20NB3TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS20NB3TA-E requirements.
6.How does Aetrix verify that HZS20NB3TA-E is sourced from the original manufacturer or authorized distributors?
All HZS20NB3TA-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 HZS20NB3TA-E meets industry standards.
7.What is the process for return or replacement of HZS20NB3TA-E?
All HZS20NB3TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS20NB3TA-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 HZS20NB3TA-E part is unused and in its original packaging.
Return procedure for HZS20NB3TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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