My Inquiry
My Account
Renesas HZK20TL-S-E
- Part No.:
- HZK20TL-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK20TL-S-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
HZK20TL-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation in stabilized 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, 500 mW power dissipation, and operates within –55°C to +175°C storage temperature range. It is used in industrial power rail stabilization and precision reference applications.
For engineers reviewing the HZK20TL-S-E datasheet, HZK20TL-S-E pinout, HZK20TL-S-E application, or HZK20TL-S-E equivalent, key selection criteria include its 20 V zener voltage tolerance, low dynamic impedance, LLD surface-mount package compatibility, thermal stability up to 175°C junction temperature, and compliance with Renesas' Standard quality grade for industrial equipment.
Technical Context
The HZK20TL-S-E employs a silicon epitaxial planar structure optimized for stable reverse-breakdown behavior under DC bias. Its zener voltage exhibits a positive temperature coefficient of +15 mV/°C near 20 V, enabling predictable drift compensation in reference designs.
It is rated for 2 mA zener test current and 1 V reverse voltage condition for leakage testing, with maximum reverse current limited to 1 µA. The device is not intended for transient suppression or high-frequency regulation - its design targets steady-state DC voltage stabilization in linear power supplies and analog reference circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8 V to 21.1 V at IZ = 2 mA - defines regulated output range for precision DC references |
| Dynamic Resistance (rd) | 60 Ω at IZ = 2 mA - determines load regulation sensitivity and ripple rejection capability |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous DC power handling on standard PCB |
| Reverse Current (IR) | ≤1 µA at VR = 1 V - ensures minimal quiescent leakage in high-impedance bias networks |
| Junction Temperature (Tj) | 175°C maximum - supports operation in thermally demanding industrial enclosures |
| Package | LLD - ultra-compact leadless surface-mount package (1.4 mm Ø, 0.027 g) for high-density PCB layouts |
Pinout & Package
LLD package: surface-mount, cylindrical, single-ended metal electrode case with cathode band marking. Dimensions: φ1.4 ± 0.1 mm, height ≈ 0.35 mm (typical). Mass: 0.027 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band) | Cathode | Connected to higher-potential node; reverse-biased terminal where regulated voltage appears |
| 2 | Anode | Connected to lower-potential node (typically ground or return path); completes zener conduction loop |
Key Features
| Feature | Design Value |
|---|---|
| Low dynamic impedance | 60 Ω enables tight voltage regulation under varying load currents in feedback references |
| Wide zener voltage spectrum (1.9–38 V) | Supports standardized voltage rails across multiple HZK-series variants without redesigning layout |
| LLD surface-mount package | Enables automated high-speed placement and high board density in compact power modules |
| 175°C maximum junction temperature | Permits use in sealed industrial enclosures or near heat-generating components without derating |
Applications
| Industrial Power Supply Reference | DC-DC Converter Feedback Node |
|---|---|
|
Use Scenario: Providing stable 20 V reference for op-amp-based error amplifiers in isolated AC/DC adapters. IC Role / Device Role / Timing Role: Zener diode acting as precision voltage clamp and reference source in secondary-side regulation loop. Use Value: Maintains ±1.15 V regulation window (18.8–21.1 V) with <1 µA leakage, minimizing feedback error in 12–24 V output converters. |
Use Scenario: Biasing voltage reference ICs (e.g., TL431) in non-isolated buck converter feedback paths. IC Role / Device Role / Timing Role: Pre-regulator establishing clean 20 V supply for shunt regulator IC input stage. Use Value: Reduces noise coupling into reference input via 60 Ω dynamic impedance, improving output voltage accuracy to ±0.5%. |
| Test Equipment Voltage Calibration | Embedded System Reset Circuit |
|
Use Scenario: Serving as traceable voltage standard in portable multimeter calibration fixtures. IC Role / Device Role / Timing Role: Stable DC reference element in voltage divider networks for ADC offset correction. Use Value: Delivers repeatable 20 V output over –25°C to +70°C ambient with <0.1%/°C TC, meeting Class II metrology requirements. |
Use Scenario: Generating brown-out detection threshold for microcontroller reset logic in factory automation controllers. IC Role / Device Role / Timing Role: Zener-based comparator input reference for undervoltage lockout (UVLO) circuitry. Use Value: Enables reliable 20 V trip point with 1 µA max leakage, ensuring deterministic reset assertion during 24 V rail sag. |
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 |
|---|---|---|---|
| BZX55C20 (ON Semiconductor) | Same 20 V nominal rating, but 500 mW Pd in DO-35 glass package; rd = 50 Ω (lower), Tj = 175°C | Through-hole assembly required; less suitable for high-density SMT production | Prefer when legacy through-hole compatibility or slightly lower impedance is prioritized over board space |
| MMSZ5248B (Diodes Inc.) | SOD-123 package, 20 V, 500 mW, rd = 30 Ω, IR = 0.1 µA at 15.2 V - tighter leakage spec but lower VZ tolerance (±5%) | Higher volume availability and RoHS-compliant packaging; optimized for consumer-grade cost-sensitive designs | Choose for high-volume consumer electronics where leakage-critical bias networks exist and 175°C rating is not required |
Compared with BZX55C20 and MMSZ5248B, the HZK20TL-S-E offers identical power rating and junction temperature but uniquely combines LLD's ultra-small footprint with Renesas' Standard-grade qualification for industrial equipment - making it optimal for space-constrained, thermally demanding embedded power rails.
Availability
HZK20TL-S-E is available at Aetrix Electronics and suitable for industrial power supplies, test and measurement equipment, and factory automation systems requiring stable component supply with long-term manufacturability assurance.
Supply support for HZK20TL-S-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 manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZK Series belongs to Renesas' discrete voltage reference product line, engineered specifically for DC voltage stabilization in industrial-grade power conversion and analog signal conditioning applications.
FAQ
What is the zener voltage tolerance of HZK20TL-S-E?
The HZK20TL-S-E has a zener voltage range of 18.8 V to 21.1 V at 2 mA test current, corresponding to a ±5.55% tolerance around the nominal 20 V rating. This specification is confirmed in the Electrical Characteristics table on page 3 of the Renesas HZK Series datasheet Rev.3.00. The tolerance reflects process-controlled epitaxial layer doping and is validated per batch during production screening.
Is HZK20TL-S-E suitable for automotive applications?
No, the HZK20TL-S-E is classified as a Standard quality grade device by Renesas and is intended for industrial, office, and consumer equipment - not automotive systems. It lacks AEC-Q200 qualification, extended temperature validation beyond 175°C junction limit, or automotive-specific reliability testing. For automotive use, Renesas offers separate High Quality grade Zener diodes with explicit AEC-Q200 certification.
What does the "TL-S-E" suffix indicate in HZK20TL-S-E?
The "TL-S-E" suffix denotes Renesas' internal package and marking variant: "TL" identifies the LLD package with specific leadframe plating, "S" indicates standard-grade reliability screening, and "E" refers to the color code configuration (Light Blue–Orange–Pink bands per page 4 of the datasheet). This full designation ensures traceability to the exact mechanical, electrical, and visual specification defined in the HZK Series ordering information.
Can HZK20TL-S-E replace HZK20 in existing designs?
Yes - HZK20TL-S-E is a direct revision of the base HZK20 part, maintaining identical electrical specifications (VZ, rd, Pd, Tj) and LLD package dimensions. The "TL-S-E" suffix reflects updated manufacturing process control and marking consistency per Renesas' post-merger documentation standards, with no functional or form-factor changes affecting drop-in replacement.
What is the thermal resistance of HZK20TL-S-E from junction to ambient?
Renesas does not publish a specific θJA value for the HZK20TL-S-E in the HZK Series datasheet. However, Figure 3 (page 5) shows power derating curves for the LLD package on a standard 15 × 20 × 1.6 mm glass-epoxy PCB. At 70°C ambient, allowable power drops to ~350 mW - implying an effective θJA of approximately 370°C/W under those exact board conditions. Actual thermal performance depends on copper area, airflow, and mounting method.
HZK20TL-S-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:
- -
HZK20TL-S-E FAQ
1.How can I place an order for HZK20TL-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK20TL-S-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 HZK20TL-S-E reliable?
The price and inventory of HZK20TL-S-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZK20TL-S-E is usually 5 days.
3.What payment methods are accepted for HZK20TL-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK20TL-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK20TL-S-E?
HZK20TL-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK20TL-S-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 HZK20TL-S-E?
For technical support, including HZK20TL-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK20TL-S-E requirements.
6.How does Aetrix verify that HZK20TL-S-E is sourced from the original manufacturer or authorized distributors?
All HZK20TL-S-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 HZK20TL-S-E meets industry standards.
7.What is the process for return or replacement of HZK20TL-S-E?
All HZK20TL-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK20TL-S-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 HZK20TL-S-E part is unused and in its original packaging.
Return procedure for HZK20TL-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK20TL-S-E Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
