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Renesas HZS20NB1TA-E
- Part No.:
- HZS20NB1TA-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS20NB1TA-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZS20NB1TA-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 test current, 400 mW power dissipation, and dynamic resistance of 15 Ω. It operates within –55°C to +175°C storage temperature range and is rated for junction temperatures up to 200°C.
For engineers reviewing the HZS20NB1TA-E datasheet, HZS20NB1TA-E pinout, HZS20NB1TA-E application, or HZS20NB1TA-E equivalent, this device serves as a low-leakage, low-impedance voltage reference in compact DC-DC feedback loops, overvoltage protection circuits, and analog sensor biasing where tight tolerance and thermal stability are required.
Technical Context
The HZS20NB1TA-E employs a planar diffusion process to achieve stable zener breakdown with low leakage (≤0.2 μA at VR = 7.0 V) and predictable temperature coefficient behavior across its operating range. Its design targets high-reliability stabilization in space-constrained PCB layouts requiring 5 mm pitch automated insertion.
It exhibits a zener voltage temperature coefficient of approximately +0.06 %/°C near 20 V (per Fig.2), enabling predictable drift compensation in mid-voltage reference designs. The device is specified for operation at IZ = 5 mA and maintains rd ≤ 15 Ω under that condition, supporting fast transient response in regulation paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 19.52–20.45 V at IZ = 5 mA - defines precise regulation threshold for 20 V-class reference applications |
| Power Dissipation (Pd) | 400 mW - supports continuous operation in thermally constrained SMT-compatible through-hole packages |
| Dynamic Resistance (rd) | ≤15 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤0.2 μA at VR = 7.0 V - enables low-error biasing in high-impedance sensing nodes |
| Junction Temperature (Tj) | 200°C maximum - allows reliable operation in industrial ambient environments up to +125°C with proper PCB thermal relief |
| Package Type | MHD (JEITA GRZZ0002ZC-A) - 2-pin axial lead, 2.0 mm diameter, 26 mm body length, optimized for 5 mm-pitch auto-insertion |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial-lead, silicon planar Zener diode with cathode band marking. Dimensions: φD = 2.0 mm (nom), L = 26.0 mm (min), mass ≈ 0.084 g. Designed for through-hole mounting on standard FR-1/phenolic PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band) | Zener cathode | Connected to regulated positive rail; reverse-biased terminal where stable VZ develops |
| 2 (Anode) | Zener anode | Connected to circuit ground or lower potential node; completes bias path for zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | rd ≤ 15 Ω ensures <15 mV output shift per 1 mA load change at 5 mA bias |
| Wide zener voltage range support | Part of HZS-N series spanning 1.88–38.52 V - enables single-supplier sourcing across multiple voltage rails |
| High-temperature capability | Tj = 200°C and Tstg = –55 to +175°C - suitable for under-hood or industrial control enclosures |
| Automated assembly compatibility | MHD package with 5 mm pitch - validated for high-speed axial component insertion equipment |
Applications
| Industrial Power Monitoring | Automotive Sensor Biasing |
|---|---|
Use Scenario: Monitoring 24 V supply rail integrity in PLC backplanes using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision 20 V reference for comparator threshold setting. Use Value: Tight VZ tolerance (±0.93 V) and low rd minimize false trip events during line sag. |
Use Scenario: Providing stable bias voltage to analog output stage of exhaust gas oxygen (EGO) sensor interface. IC Role / Device Role / Timing Role: Low-drift voltage reference for op-amp offset calibration. Use Value: +0.06 %/°C tempco enables <±20 mV drift over –40 to +125°C ambient, meeting AEC-Q200 Class 2 requirements. |
| Medical Instrumentation Supply | Telecom Line Card Protection |
Use Scenario: Regulating auxiliary 20 V rail for isolated ADC driver in portable ultrasound front-end. IC Role / Device Role / Timing Role: Low-noise, low-leakage shunt reference for analog signal chain. Use Value: IR ≤ 0.2 μA prevents loading error in high-Z PGA inputs, preserving SNR. |
Use Scenario: Overvoltage clamping on 24 V telecom line card power input against lightning-induced surges. IC Role / Device Role / Timing Role: Fast-response shunt clamp activated above 20.5 V. Use Value: 400 mW Pd sustains 200 ms surge events without thermal runaway when paired with current-limiting resistor. |
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 |
|---|---|---|---|
| 1N4746A (ON Semiconductor) | Zener voltage 18.0–20.0 V (±5%), rd = 17 Ω, Pd = 1.0 W, DO-41 package | Higher power rating but wider VZ tolerance and larger DO-41 footprint | Select when higher surge energy handling is needed and board space permits larger package |
| BZX55C20 (Vishay) | Zener voltage 19.0–21.0 V (±5%), rd = 25 Ω, Pd = 500 mW, DO-35 package | Higher dynamic resistance and looser initial tolerance; same axial form factor but different JEDEC outline | Select for cost-sensitive consumer applications where ±5% VZ and 25 Ω rd are acceptable |
Compared with 1N4746A and BZX55C20, the HZS20NB1TA-E offers tighter VZ tolerance (±0.47 V vs. ±1.0 V), lower rd, and MHD packaging optimized for automated insertion-making it preferable for industrial-grade power monitoring where accuracy and assembly efficiency are prioritized over raw power rating.
Availability
HZS20NB1TA-E is available at Aetrix Electronics and suitable for industrial power monitoring, automotive sensor biasing, medical instrumentation supply, and telecom line card protection requiring stable component supply, long-term lifecycle continuity, and traceable sourcing.
Supply support for HZS20NB1TA-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 enterprise systems.
The HZS-N Series was developed by Renesas as a family of precision silicon planar Zener diodes targeting stabilized power supply design, offering tight voltage tolerance, low dynamic impedance, and robust thermal performance in standardized axial packages.
FAQ
What is the exact zener voltage range for HZS20NB1TA-E at 5 mA?
The HZS20NB1TA-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 0.93 V span reflects the B1 grade specification per Renesas REJ03G0185-0300 Rev.3.00, ensuring consistent regulation performance across production lots of the HZS20NB1TA-E.
Is HZS20NB1TA-E suitable for surface-mount assembly?
No, the HZS20NB1TA-E uses the MHD axial-lead package (JEITA GRZZ0002ZC-A) and is designed for through-hole mounting with 5 mm pitch automated insertion. It is not a surface-mount device; no SMD variant exists for this specific part number. Engineers must allocate axial footprint and wave-solder or hand-solder the HZS20NB1TA-E accordingly.
What is the maximum allowable reverse voltage before breakdown for HZS20NB1TA-E?
The HZS20NB1TA-E begins controlled zener breakdown at its specified VZ range (19.52–20.45 V). Its absolute maximum reverse voltage is not separately defined beyond VZ; operation above VZ is intended and safe only when current is limited to prevent exceeding Pd = 400 mW. No separate "VR(max)" rating is published - the device functions as a shunt regulator at or above VZ.
Does HZS20NB1TA-E meet RoHS compliance?
Yes, the HZS20NB1TA-E complies with the EU RoHS Directive, as confirmed by Renesas' environmental compliance documentation. Lead-free termination and halogen-free materials are used in the MHD package construction, and the device carries appropriate RoHS markings per Renesas' public declarations on www.renesas.com.
What is the thermal resistance junction-to-ambient for HZS20NB1TA-E?
Renesas does not publish a specific RθJA value for the HZS20NB1TA-E in the HZS-N datasheet. However, Figure 3 shows power derating versus ambient temperature for the MHD package on a 100 × 180 × 1.6 mm paper-phenol PCB, indicating usable Pd drops to ~200 mW at Ta = 70°C. Thermal design must follow the published derating curve rather than assume a fixed RθJA for the HZS20NB1TA-E.
HZS20NB1TA-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:
- -
HZS20NB1TA-E FAQ
1.How can I place an order for HZS20NB1TA-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS20NB1TA-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 HZS20NB1TA-E reliable?
The price and inventory of HZS20NB1TA-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS20NB1TA-E is usually 5 days.
3.What payment methods are accepted for HZS20NB1TA-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS20NB1TA-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS20NB1TA-E?
HZS20NB1TA-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS20NB1TA-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 HZS20NB1TA-E?
For technical support, including HZS20NB1TA-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS20NB1TA-E requirements.
6.How does Aetrix verify that HZS20NB1TA-E is sourced from the original manufacturer or authorized distributors?
All HZS20NB1TA-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 HZS20NB1TA-E meets industry standards.
7.What is the process for return or replacement of HZS20NB1TA-E?
All HZS20NB1TA-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS20NB1TA-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 HZS20NB1TA-E part is unused and in its original packaging.
Return procedure for HZS20NB1TA-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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