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Renesas HZK20JTR
- Part No.:
- HZK20JTR
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK20JTR.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:187,500
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Product details
Overview
HZK20JTR from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power supply circuits. It delivers a nominal zener voltage of 20 V (min 18.8 V, max 21.1 V) at 2 mA test current, with dynamic resistance of 60 Ω, maximum power dissipation of 500 mW, and operates within –55°C to +175°C storage temperature range. It is used in precision reference and feedback paths of DC-DC converters and linear regulators.
For engineers reviewing the HZK20JTR datasheet, HZK20JTR pinout, HZK20JTR application, or HZK20JTR equivalent, key selection criteria include its 20 V zener voltage tolerance, 60 Ω dynamic impedance at 2 mA, LLD surface-mount package compatibility, thermal stability up to 175°C junction temperature, and compliance with Renesas' Standard quality grade for industrial and consumer power applications.
Technical Context
The HZK20JTR employs a silicon epitaxial planar structure optimized for stable reverse-breakdown behavior under DC bias. Its zener voltage exhibits a positive temperature coefficient of approximately +15 mV/°C near 20 V, as confirmed by Figure 2 in the datasheet, enabling predictable drift compensation in reference designs.
It is rated for 2 mA zener test current and 1 V reverse voltage condition for leakage measurement, with maximum reverse current limited to 1 µA. The device is not intended for surge suppression or transient clamping-its design focuses exclusively on steady-state voltage reference accuracy and low dynamic impedance in regulated power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V to 21.1 V at IZ = 2 mA - defines stable regulation window for feedback networks |
| Dynamic Resistance (rd) | 60 Ω at IZ = 2 mA - determines load regulation sensitivity and ripple rejection |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous DC power handling on PCB |
| Reverse Current (IR) | ≤1 µA at VR = 1 V - ensures minimal quiescent leakage in high-impedance bias chains |
| Junction Temperature (Tj) | 175°C maximum - supports operation in thermally constrained enclosures without derating |
| Package | LLD - ultra-compact leadless surface-mount package (1.4 mm Ø, 0.027 g) for high-density layouts |
Pinout & Package
Package: LLD - leadless, cylindrical, glass-passivated silicon diode package with cathode band marking. Dimensions: φ1.4 ± 0.1 mm, height ~0.35 mm (typ), mass 0.027 g. Designed for reflow-compatible high-speed SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band) | Cathode | Connected to regulated output node or error amplifier inverter input; polarity critical for correct breakdown conduction |
| 2 | Anode | Connected to ground or lower-potential rail; forms reference return path for zener current loop |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 60 Ω at 2 mA enables tight voltage regulation under varying load currents |
| Wide zener voltage spectrum | 20 V nominal point within 18.8–21.1 V range supports ±5.5% tolerance-critical references |
| High thermal endurance | 175°C max junction temperature allows use in sealed or convection-limited power supplies |
| LLD surface-mount package | 0.027 g mass and 1.4 mm diameter enable placement in space-constrained IoT and portable power modules |
Applications
| Switch-Mode Power Supply Feedback | Linear Regulator Reference |
|---|---|
Use Scenario: Provides precise 20 V reference in optocoupler-based feedback loop of isolated 24 V output flyback converter. IC Role / Device Role / Timing Role: Zener diode acting as secondary-side voltage sensing element and error signal source. Use Value: 60 Ω dynamic resistance minimizes output voltage deviation across 10–100% load steps. | Use Scenario: Sets regulated 20 V output in three-terminal adjustable linear regulator circuit with external resistor divider. IC Role / Device Role / Timing Role: Stable voltage reference defining upper threshold of regulation loop. Use Value: 1 µA reverse leakage prevents significant current loss in high-resistance divider networks. |
| Microcontroller Reset Circuit | ADC Reference Stabilization |
Use Scenario: Supplies clean 20 V bias to reset supervisor IC requiring accurate undervoltage detection threshold. IC Role / Device Role / Timing Role: Precision voltage clamp establishing reliable reset activation level. Use Value: Tight 18.8–21.1 V tolerance ensures consistent reset assertion across temperature and unit variance. | Use Scenario: Buffers and stabilizes 20 V reference for 12-bit SAR ADC in industrial sensor interface module. IC Role / Device Role / Timing Role: Low-noise, low-drift DC reference source for analog-to-digital conversion. Use Value: +15 mV/°C tempco allows predictable calibration offset correction in firmware. |
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 |
|---|---|---|---|
| BZX55C20 (ON Semiconductor) | Same 20 V nominal, but 500 mW rating at 25°C only; rd = 70 Ω; DO-35 package (larger, axial leaded) | Requires through-hole PCB layout; less suitable for automated SMT production | Choose for legacy through-hole designs where board real estate is not constrained |
| MMSZ5248B (Diodes Inc.) | 20 V nominal, SOD-123 package, rd = 50 Ω, Pd = 500 mW, IR = 0.1 µA at 15 V | Lower leakage and slightly better impedance, but different footprint and thermal profile | Prefer when sub-µA leakage is critical and SOD-123 reflow profile is already qualified |
Compared with BZX55C20 and MMSZ5248B, the HZK20JTR offers identical 20 V regulation with Renesas' LLD package for ultra-compact SMT placement, moderate 60 Ω impedance, and guaranteed 1 µA leakage at 1 V-making it optimal for cost-sensitive, space-constrained industrial power monitors where standard-grade reliability suffices.
Availability
HZK20JTR is available at Aetrix Electronics and suitable for switch-mode power supplies, linear regulator references, microcontroller reset circuits, and ADC reference stabilization requiring stable component supply and long-term manufacturability.
Supply support for HZK20JTR 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices, with global R&D and manufacturing infrastructure.
The HZK Series belongs to Renesas' discrete Zener diode product line, engineered specifically for stable, low-power voltage reference and regulation in consumer, industrial, and office equipment power systems.
FAQ
What is the exact zener voltage range specified for HZK20JTR?
The HZK20JTR has a guaranteed zener voltage range of 18.8 V to 21.1 V when tested at 2 mA zener current and 25°C ambient temperature, as documented in the "Electrical Characteristics" table on page 3 of the Renesas datasheet Rev.3.00. This 20 V nominal rating reflects a ±5.5% tolerance band optimized for stable reference applications.
Does HZK20JTR support surface-mount assembly, and what is its package type?
Yes, the HZK20JTR uses the LLD package-a leadless, cylindrical, glass-passivated surface-mount package measuring φ1.4 ± 0.1 mm with a typical height of 0.35 mm. It is qualified for standard reflow soldering processes and designed for high-density PCB layouts in compact power modules.
What is the maximum reverse leakage current for HZK20JTR, and under what condition is it measured?
The maximum reverse leakage current for HZK20JTR is 1 µA, measured at a reverse voltage (VR) of 1 V and ambient temperature of 25°C. This value is specified in the "Electrical Characteristics" table on page 3 and confirms suitability for high-impedance bias and reference networks.
Is HZK20JTR rated for automotive or safety-critical applications?
No, the HZK20JTR is classified as a "Standard" quality grade device per Renesas' quality grading system and is intended for computers, office equipment, communications gear, audio/video devices, and industrial robots-not for automotive, medical life-support, aerospace, or nuclear applications. Its datasheet explicitly excludes such uses without prior written consent.
How does the temperature coefficient of HZK20JTR affect its performance in wide-temperature environments?
The HZK20JTR exhibits a positive zener voltage temperature coefficient of approximately +15 mV/°C near 20 V, as shown in Figure 2 of the datasheet. This means its regulated voltage increases linearly with temperature, enabling predictable drift compensation in reference circuits operating from –40°C to +85°C ambient ranges.
HZK20JTR 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:
- -
HZK20JTR FAQ
1.How can I place an order for HZK20JTR through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK20JTR 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 HZK20JTR reliable?
The price and inventory of HZK20JTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK20JTR is usually 5 days.
3.What payment methods are accepted for HZK20JTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK20JTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK20JTR?
HZK20JTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK20JTR 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 HZK20JTR?
For technical support, including HZK20JTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK20JTR requirements.
6.How does Aetrix verify that HZK20JTR is sourced from the original manufacturer or authorized distributors?
All HZK20JTR 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 HZK20JTR meets industry standards.
7.What is the process for return or replacement of HZK20JTR?
All HZK20JTR units undergo pre-shipment inspection (PSI). If there is an issue with HZK20JTR, 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 HZK20JTR part is unused and in its original packaging.
Return procedure for HZK20JTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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