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Renesas HZK20LTL-S-E
- Part No.:
- HZK20LTL-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK20LTL-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
HZK20LTL-S-E 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 junction temperature rating up to 175°C. It is used in precision reference and overvoltage protection circuits within industrial control modules.
For engineers reviewing the HZK20LTL-S-E datasheet, HZK20LTL-S-E pinout, HZK20LTL-S-E application, or HZK20LTL-S-E equivalent, key selection criteria include its 20 V zener voltage tolerance, 60 Ω dynamic impedance at 2 mA, LLD surface-mount package dimensions, and −55°C to +175°C storage temperature range.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified current range. Its low leakage current (≤1 µA at VR = 15 V) and stable temperature coefficient (≈+5.5 mV/°C near 20 V, per Fig.2) support consistent reference performance in ambient-temperature-varying environments.
The device uses an epitaxial planar structure to achieve low zener impedance and high reliability under continuous DC bias. It is rated for 500 mW power dissipation on PCB mounting and requires no external biasing circuitry-functioning as a two-terminal shunt regulator directly across load or reference nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18.8–21.1 V at IZ = 2 mA - defines regulated output voltage window for reference or clamp operation |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 2 mA - determines load regulation sensitivity and ripple rejection capability |
| Power Dissipation (Pd) | 500 mW max at Ta = 25°C - sets thermal derating limit for PCB layout and copper area design |
| Reverse Leakage (IR) | ≤1 µA at VR = 15 V - ensures minimal quiescent current draw in standby or high-impedance reference paths |
| Junction Temperature (Tj) | 175°C max - enables operation in thermally demanding industrial enclosures without forced cooling |
| Storage Temperature | −55°C to +175°C - supports extended environmental qualification for automotive under-hood or factory-floor deployments |
Pinout & Package
Package: LLD (leadless, low-profile, surface-mount diode package), JEDEC-unregistered, JEITA-unregistered, mass ≈ 0.027 g, dimensions per Rev.3.00 page 6: 1.4 ± 0.1 mm diameter, 3.5 mm height, 0.35 mm typical lead spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Connected to regulated voltage node | Accepts input voltage; reverse-biased terminal where zener breakdown occurs |
| 2 (Anode) | Ground or return path | Provides reference potential; current flows from cathode to anode during regulation |
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 option within 1.9–38 V family supports standardized BOM consolidation |
| LLD surface-mount package | Compact 1.4 mm diameter footprint allows high-density PCB layouts and automated assembly |
| High junction temperature rating | 175°C Tj permits use in sealed enclosures or near heat-generating components |
Applications
| Industrial Power Monitoring | Embedded Reference Circuit |
|---|---|
Use Scenario: Monitoring 24 V DC bus voltage in PLC I/O modules with analog-to-digital conversion. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 20 V reference for ADC input scaling and fault threshold detection. Use Value: Enables accurate 0–24 V measurement resolution using a 3.3 V microcontroller ADC with external resistor divider and HZK20LTL-S-E clamping. | Use Scenario: Generating a precise bias point for op-amp comparators in battery management systems. IC Role / Device Role / Timing Role: Two-terminal voltage clamp establishing fixed 20 V reference against which cell voltages are compared. Use Value: Reduces component count by eliminating active reference ICs while maintaining ±5% regulation accuracy over temperature. |
| Overvoltage Protection | Signal-Level Clamping |
Use Scenario: Protecting microcontroller GPIO pins from transient surges on 18–22 V sensor supply lines. IC Role / Device Role / Timing Role: Passive crowbar element that conducts above 21.1 V to divert excess energy to ground. Use Value: Limits peak voltage to ≤21.1 V with fast response (ns-scale turn-on), preventing latch-up or ESD damage to downstream logic. | Use Scenario: Conditioning analog sensor outputs (e.g., 4–20 mA transmitters) before feeding into 3.3 V ADC inputs. IC Role / Device Role / Timing Role: Bidirectional clamp limiting signal swing to safe levels using series resistor + HZK20LTL-S-E to ground. Use Value: Prevents ADC saturation during sensor fault conditions while preserving linearity below 20 V due to low rd. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode 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; TO-92 through-hole package | Requires through-hole PCB assembly; less suitable for space-constrained SMT designs | Select when legacy through-hole manufacturing or higher mechanical robustness is prioritized over board density |
| MMSZ5248B (Diodes Inc.) | 20 V nominal, SOD-123 package, rd = 30 Ω, Pd = 500 mW, tighter VZ tolerance (±5%) | Lower dynamic impedance improves regulation stability; smaller footprint than LLD but different pad layout | Choose for improved regulation accuracy and modern SMT compatibility-requires PCB land pattern revision |
Compared with BZX55C20 and MMSZ5248B, the HZK20LTL-S-E offers a unique LLD package geometry optimized for high-speed pick-and-place, moderate dynamic impedance (60 Ω), and Renesas' industrial-grade reliability qualification-making it optimal for cost-sensitive, volume-manufactured industrial controls where thermal margin and assembly speed matter.
Availability
HZK20LTL-S-E is available at Aetrix Electronics and suitable for industrial power monitoring, embedded reference circuits, overvoltage protection, and signal-level clamping requiring stable component supply and long-term obsolescence management.
Supply support for HZK20LTL-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 Japanese semiconductor manufacturer formed in 2010 via merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices for industrial and automotive markets.
The HZK Series belongs to Renesas' discrete Zener diode product line, engineered specifically for stabilized DC power supply applications where precision, thermal resilience, and surface-mount manufacturability are critical.
FAQ
What is the zener voltage tolerance of HZK20LTL-S-E?
The HZK20LTL-S-E has a zener voltage range of 18.8 V to 21.1 V at a test current of 2 mA, corresponding to a nominal 20 V rating with ±5.5% tolerance. This specification is confirmed in the Electrical Characteristics table on page 3 of Rev.3.00 (May 14, 2003). The HZK20LTL-S-E does not carry grade suffixes (A/B/C), so its tolerance aligns with the base HZK20 entry in the datasheet.
Is HZK20LTL-S-E RoHS compliant?
Yes, HZK20LTL-S-E complies with the EU RoHS Directive, as confirmed by Renesas Electronics' environmental compliance documentation and material declarations. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. Renesas recommends verifying current compliance status via their official website or authorized distributor portals before final design-in.
What is the thermal derating behavior of HZK20LTL-S-E above 25°C?
HZK20LTL-S-E follows standard thermal derating: its 500 mW power dissipation rating decreases linearly above 25°C ambient, reaching zero at approximately 150°C (per Fig.3, page 5). Derating slope is ~6.25 mW/°C. This behavior must be accounted for in PCB copper area design and enclosure airflow planning to ensure junction temperature remains ≤175°C under worst-case operating conditions.
Can HZK20LTL-S-E be used in place of HZK20B or HZK20C variants?
No-HZK20LTL-S-E is not interchangeable with HZK20B or HZK20C. Those variants specify tighter zener voltage tolerances (e.g., HZK20B: 19.4–20.6 V), whereas HZK20LTL-S-E matches the base HZK20 specification (18.8–21.1 V) without grade coding. Substitution may cause reference inaccuracy in precision applications; always verify voltage distribution requirements before replacement.
What is the meaning of "LTL-S-E" in the part number HZK20LTL-S-E?
The suffix "LTL-S-E" denotes Renesas' internal packaging and processing variant: "LTL" indicates LLD package with tape-and-reel delivery, "S" signifies standard quality grade (for industrial/commercial use), and "E" identifies the specific revision or environmental compliance level (e.g., halogen-free, RoHS-compliant). This suffix does not alter electrical specifications from the base HZK20 device defined in Rev.3.00.
HZK20LTL-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:
- -
HZK20LTL-S-E FAQ
1.How can I place an order for HZK20LTL-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK20LTL-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 HZK20LTL-S-E reliable?
The price and inventory of HZK20LTL-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 HZK20LTL-S-E is usually 5 days.
3.What payment methods are accepted for HZK20LTL-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK20LTL-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK20LTL-S-E?
HZK20LTL-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK20LTL-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 HZK20LTL-S-E?
For technical support, including HZK20LTL-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK20LTL-S-E requirements.
6.How does Aetrix verify that HZK20LTL-S-E is sourced from the original manufacturer or authorized distributors?
All HZK20LTL-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 HZK20LTL-S-E meets industry standards.
7.What is the process for return or replacement of HZK20LTL-S-E?
All HZK20LTL-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK20LTL-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 HZK20LTL-S-E part is unused and in its original packaging.
Return procedure for HZK20LTL-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK20LTL-S-E Tags
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