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Renesas HZK24LTL-S-E
- Part No.:
- HZK24LTL-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK24LTL-S-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
HZK24LTL-S-E from Renesas Electronics is a silicon epitaxial planar Zener diode designed for voltage regulation and stabilization in low-power supply circuits, with a nominal zener voltage of 24 V (22.9–25.5 V), maximum power dissipation of 500 mW, dynamic resistance of 70 Ω at 2 mA, and operating junction temperature up to 175°C. It is used in precision reference and overvoltage protection circuits in industrial control modules and sensor signal conditioning stages.
For engineers reviewing the HZK24LTL-S-E datasheet, HZK24LTL-S-E pinout, HZK24LTL-S-E application, or HZK24LTL-S-E equivalent, key selection criteria include its ±5% zener voltage tolerance (Grade C), LLD surface-mount package, low leakage current (<1 µA at VR = 19 V), and temperature coefficient of +8.5 mV/°C - critical for stable biasing in temperature-varying environments.
Technical Context
This device operates as a two-terminal voltage reference using avalanche breakdown in a planar epitaxial structure, optimized for DC stabilization rather than transient suppression. Its zener voltage is specified at 2 mA test current, with dynamic resistance measured under the same condition, and exhibits a positive temperature coefficient above 5 V - confirmed at +8.5 mV/°C for the HZK24 variant.
The LLD package enables high-density PCB layout with cathode-anode pin arrangement (Pin 1 = Cathode, Pin 2 = Anode) and supports reflow soldering per JEDEC standards. Thermal derating begins at 25°C ambient, with linear power reduction to zero at 150°C on standard FR-4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.9–25.5 V at IZ = 2 mA - defines stable regulation range for mid-range supply rails. |
| Dynamic Resistance (rd) | 70 Ω max at IZ = 2 mA - determines output impedance and load regulation sensitivity. |
| Power Dissipation (Pd) | 500 mW at Ta = 25°C - sets maximum continuous DC power handling on standard PCB. |
| Reverse Leakage (IR) | <1 µA at VR = 19 V - ensures minimal quiescent current in standby bias networks. |
| Temperature Coefficient (γZ) | +8.5 mV/°C - quantifies voltage drift per degree, enabling thermal error budgeting in precision references. |
| Junction Temperature (Tj) | 175°C max - defines upper thermal limit for reliability in enclosed or high-ambient environments. |
Pinout & Package
Package: LLD - leadless, surface-mount, glass-passivated silicon diode package with 0.027 g mass and 1.4 mm diameter outline; compatible with automated pick-and-place and reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode Band) | Zener cathode terminal | Connected to regulated output node; polarity marking essential for correct orientation in series-shunt regulation. |
| 2 (Anode) | Zener anode terminal | Typically tied to ground or lower-potential rail; forms reference path for current-limited biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 70 Ω max ensures tight regulation under varying load currents in feedback references. |
| Wide zener voltage range (1.9–38 V) | Enables single-family sourcing across multiple supply rails without redesigning reference topology. |
| LLD surface-mount package | Supports high-density PCB layouts and high-speed assembly with standardized footprint and thermal profile. |
| Stable temperature coefficient | +8.5 mV/°C allows predictable drift compensation in analog front-end calibration circuits. |
Applications
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
|---|---|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory-floor temperature and pressure transmitters. IC Role / Device Role / Timing Role: Zener diode providing fixed 24 V reference for Wheatstone bridge biasing and ADC reference scaling. Use Value: Maintains <±0.5% output stability over –40°C to +85°C ambient due to predictable +8.5 mV/°C drift and low rd. |
Use Scenario: Clamping input surge transients on 24 VDC digital I/O channels in modular PLC backplanes. IC Role / Device Role / Timing Role: Shunt overvoltage protector limiting line voltage to safe levels during ESD or inductive kick events. Use Value: Absorbs up to 500 mW peak power without degradation, with <1 µA leakage preserving high-impedance input integrity. |
| Medical Diagnostic Equipment Power Rails | Test & Measurement Instrument Reference |
Use Scenario: Generating stable bias for op-amp comparators in portable blood glucose meter analog front ends. IC Role / Device Role / Timing Role: Precision DC voltage reference ensuring consistent threshold detection across battery discharge cycles. Use Value: Delivers 24 V regulation with ±5% tolerance and 70 Ω dynamic resistance, minimizing comparator hysteresis variation. |
Use Scenario: Providing calibrated reference for multimeter auto-ranging circuitry and DMM internal DAC offset trimming. IC Role / Device Role / Timing Role: Stable shunt reference enabling accurate 24 V full-scale measurement calibration points. Use Value: Low 1 µA leakage at 19 V reverse bias prevents loading errors in high-impedance calibration paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24 (Nexperia) | Same 24 V nominal, SOT-23 package, 250 mW Pd, 90 Ω rd - lower power rating and higher impedance. | Not suitable for 500 mW continuous dissipation; limited to low-current biasing or intermittent clamping. | Select only when board space constraints require SOT-23 and thermal load remains below 250 mW. |
| 1N5245B (ON Semiconductor) | 24 V nominal, DO-35 axial package, 500 mW Pd, 35 Ω rd - lower impedance but through-hole mounting required. | Requires manual or wave-solder assembly; incompatible with fully SMT production lines. | Choose only for prototyping or legacy through-hole designs where lower rd justifies assembly complexity. |
Compared with BZX84-C24 and 1N5245B, the HZK24LTL-S-E uniquely combines 500 mW surface-mount capability, 70 Ω dynamic resistance, and LLD footprint - making it optimal for high-density, thermally constrained, and volume-manufactured industrial electronics.
Availability
HZK24LTL-S-E is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, programmable logic controller (PLC) input protection, and test & measurement instrument reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for HZK24LTL-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 leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZK Series is part of Renesas' discrete Zener diode portfolio, engineered for precision voltage stabilization in power supply and reference circuits across Standard-grade applications including industrial automation and test equipment.
FAQ
What is the zener voltage tolerance for HZK24LTL-S-E?
The HZK24LTL-S-E has a zener voltage range of 22.9 V to 25.5 V at 2 mA test current, corresponding to ±5% tolerance (Grade C). This is explicitly defined in the Electrical Characteristics table on page 3 of the Renesas HZK Series datasheet Rev.3.00. The tolerance ensures predictable regulation performance in production-batched power supply designs without individual calibration.
Is HZK24LTL-S-E RoHS compliant?
Yes, HZK24LTL-S-E meets EU RoHS Directive requirements. Renesas confirms environmental compliance for the HZK Series in its product documentation and public declarations, and Aetrix Electronics sources only RoHS-compliant lots with full material declarations available upon request for HZK24LTL-S-E.
What is the maximum reverse leakage current for HZK24LTL-S-E?
The maximum reverse leakage current for HZK24LTL-S-E is less than 1 µA when tested at VR = 19 V, as specified in the Electrical Characteristics table on page 3 of the Renesas datasheet. This low leakage preserves accuracy in high-impedance reference and bias networks where current draw must be minimized.
Can HZK24LTL-S-E be used in place of HZK24C?
Yes - HZK24LTL-S-E is the modern Renesas designation replacing HZK24C, retaining identical electrical specifications (22.9–25.5 V VZ, 70 Ω rd, 500 mW Pd) and LLD package. The "LTL-S-E" suffix denotes tape-and-reel packaging and enhanced environmental compliance, with no functional or parametric deviation from HZK24C.
What is the thermal derating behavior of HZK24LTL-S-E?
HZK24LTL-S-E derates linearly from 500 mW at 25°C ambient to 0 mW at 150°C, based on the Power Dissipation vs. Ambient Temperature curve (Fig.3, page 5). This derating slope of –3.57 mW/°C applies to standard FR-4 PCB mounting (15 × 20 × 1.6 mm), and must be applied in thermal design calculations for enclosed or high-temperature enclosures.
HZK24LTL-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:
- -
HZK24LTL-S-E FAQ
1.How can I place an order for HZK24LTL-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK24LTL-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 HZK24LTL-S-E reliable?
The price and inventory of HZK24LTL-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 HZK24LTL-S-E is usually 5 days.
3.What payment methods are accepted for HZK24LTL-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK24LTL-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK24LTL-S-E?
HZK24LTL-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK24LTL-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 HZK24LTL-S-E?
For technical support, including HZK24LTL-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK24LTL-S-E requirements.
6.How does Aetrix verify that HZK24LTL-S-E is sourced from the original manufacturer or authorized distributors?
All HZK24LTL-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 HZK24LTL-S-E meets industry standards.
7.What is the process for return or replacement of HZK24LTL-S-E?
All HZK24LTL-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK24LTL-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 HZK24LTL-S-E part is unused and in its original packaging.
Return procedure for HZK24LTL-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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