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Renesas HZK24TR-S-E
- Part No.:
- HZK24TR-S-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZK24TR-S-E.pdf
- Description:
- DIODE ZENER 0.5W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZK24TR-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 24 V (22.9–25.5 V at 2 mA), with dynamic resistance of 70 Ω, maximum power dissipation of 500 mW, and operates within a junction temperature range up to 175°C - commonly used in precision reference and feedback loops of DC-DC converters and linear regulators.
For engineers reviewing the HZK24TR-S-E datasheet, HZK24TR-S-E pinout, HZK24TR-S-E application, or HZK24TR-S-E equivalent, key selection criteria include its 24 V zener tolerance (±1.3 V), low leakage current (<1 µA at VR = 19 V), LLD surface-mount package compatibility, thermal coefficient behavior, and suitability for high-density PCB layouts requiring stable low-current regulation.
Technical Context
This device functions as a two-terminal shunt voltage regulator, maintaining a stable output by conducting reverse current above its specified breakdown threshold. Its epitaxial planar construction ensures consistent zener impedance and low temperature drift across production lots.
The HZK24TR-S-E is characterized at 2 mA test current and exhibits a positive zener voltage temperature coefficient (~+19 mV/°C near 24 V), requiring thermal-aware placement in feedback networks. It is not intended for surge suppression or transient clamping - its design targets steady-state DC reference stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.9 V to 25.5 V at IZ = 2 mA - defines regulation window for feedback node biasing |
| Dynamic Resistance (rd) | 70 Ω max at IZ = 2 mA - determines load regulation sensitivity and ripple rejection |
| Power Dissipation (Pd) | 500 mW max at Ta = 25°C - sets upper limit for continuous current in series-resistor designs |
| Reverse Leakage Current | <1 µA at VR = 19 V - ensures minimal quiescent error in high-impedance reference paths |
| Junction Temperature (Tj) | –55°C to +175°C - supports operation in industrial ambient environments without derating below 125°C |
| Package Type | LLD (leadless, surface-mount) - enables automated placement and high board density in compact power modules |
Pinout & Package
LLD package: ultra-compact, leadless, rectangular surface-mount outline with cathode band marking. Dimensions: 1.4 mm × 1.35 mm × 0.35 mm (typical height). Mass: 0.027 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Regulated output node | Connected to higher-potential side of series resistor; supplies stable reference voltage to feedback network |
| 2 (Anode) | Reference ground node | Typically tied to circuit common or control IC ground; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 70 Ω max ensures tight regulation under varying load currents in feedback divider networks |
| Wide zener voltage spectrum | 24 V nominal point fits standard 24 V rail monitoring and isolated DC-DC secondary-side sensing |
| LLD surface-mount package | Enables 0.5 mm pitch routing and compatibility with reflow soldering profiles for high-volume manufacturing |
| Stable temperature coefficient | +19 mV/°C allows predictable drift compensation in temperature-critical references |
Applications
| Industrial Power Supply Feedback | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Regulating output voltage of isolated flyback converter in programmable logic controller (PLC) power stage. IC Role / Device Role / Timing Role: Shunt reference diode providing precise 24 V feedback to optocoupler input, enabling primary-side regulation. Use Value: Maintains ±1.3 V tolerance over temperature, minimizing output drift without external trimming components. |
Use Scenario: Generating stable bias for microcontroller ADC reference in 12 V automotive body control unit. IC Role / Device Role / Timing Role: Zener clamp establishing clean 24 V auxiliary rail from switched 12 V supply via boost converter. Use Value: Low leakage (<1 µA) prevents loading error on high-impedance ADC reference divider network. |
| Test Equipment Voltage Calibration | IoT Sensor Node Power Management |
Use Scenario: Precision voltage reference in handheld multimeter front-end analog section. IC Role / Device Role / Timing Role: Stable 24 V zener source for DAC output scaling and analog comparator thresholds. Use Value: 70 Ω dynamic resistance minimizes step response error during auto-ranging transitions. |
Use Scenario: Low-power voltage supervisor in battery-powered environmental sensor node. IC Role / Device Role / Timing Role: Zener-based undervoltage lockout (UVLO) trigger for system reset circuitry. Use Value: Junction temperature rating up to 175°C supports reliable operation inside sealed outdoor enclosures. |
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, 400 mW Pd, rd = 80 Ω max | Higher thermal resistance due to larger package footprint; less suitable for ultra-dense layouts | Select when SOT-23 handling infrastructure is already established and 100 mW lower power margin is acceptable |
| MMSZ4686 (ON Semiconductor) | 24 V nominal, SOD-123 package, 500 mW Pd, rd = 75 Ω max, tighter VZ tolerance (±5%) | Slightly higher dynamic resistance; requires different land pattern and stencil aperture | Prefer for designs needing tighter initial tolerance where LLD footprint adaptation is feasible |
Compared with BZX84-C24 and MMSZ4686, the HZK24TR-S-E offers identical power rating and superior dynamic resistance (70 Ω vs. 75–80 Ω), optimized for space-constrained feedback paths where low impedance and minimal board area are critical - though its LLD package demands specific pick-and-place tooling.
Availability
HZK24TR-S-E is available at Aetrix Electronics and suitable for industrial power supplies, test instrumentation, automotive body electronics, and IoT edge sensor nodes requiring stable component supply with guaranteed long-term sourcing.
Supply support for HZK24TR-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 was developed by Renesas Electronics as a family of precision silicon Zener diodes targeting stabilized DC power supply feedback, reference, and voltage-clamp functions in high-reliability embedded systems.
FAQ
What is the exact zener voltage range for HZK24TR-S-E at 2 mA test current?
The HZK24TR-S-E has a guaranteed zener voltage range of 22.9 V to 25.5 V when tested at IZ = 2 mA and Ta = 25°C. This 2.6 V span reflects the device's grade-specific tolerance and must be accounted for in feedback divider calculations. The nominal 24 V value is the center point of this range, and actual units fall within it per Renesas' characterization data on page 3 of the HZK Series datasheet (Rev. 3.00).
Does HZK24TR-S-E support operation above 125°C ambient temperature?
Yes - the HZK24TR-S-E is rated for storage and operation from –55°C to +175°C junction temperature. At elevated ambient temperatures, derating applies: its 500 mW power dissipation decreases linearly above 25°C per the curve in Figure 3 (page 5). For sustained 125°C ambient use, maximum allowable power drops to approximately 320 mW, assuming standard PCB thermal coupling.
Is the LLD package of HZK24TR-S-E compatible with standard reflow soldering profiles?
Yes - the LLD package of HZK24TR-S-E is qualified for lead-free reflow soldering per J-STD-020. Its glass-epoxy PCB mounting (per page 6) supports peak temperatures up to 260°C for ≤10 seconds. The 0.35 mm typical height and 1.4 mm × 1.35 mm footprint require precise stencil aperture design and 0.3–0.4 mm solder paste volume to ensure coplanarity and void-free joints.
How does the temperature coefficient of HZK24TR-S-E affect its performance in precision references?
The HZK24TR-S-E exhibits a positive temperature coefficient of approximately +19 mV/°C near 24 V (Figure 2, page 5), meaning its zener voltage rises linearly with junction temperature. In precision references, this drift must be compensated via resistor network design or matched TC components; uncorrected, it introduces ~0.08% error per °C change in junction temperature.
Can HZK24TR-S-E replace older NEC-branded HZK24 variants without design changes?
Yes - the HZK24TR-S-E is a direct continuation of the legacy NEC HZK24 series under Renesas Electronics ownership, with identical electrical specifications, LLD package dimensions, pinout, and marking scheme (Light Blue/Verdure/Pink bands per page 4). No schematic or layout modifications are required when migrating from prior NEC-labeled HZK24 devices.
HZK24TR-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:
- -
HZK24TR-S-E FAQ
1.How can I place an order for HZK24TR-S-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZK24TR-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 HZK24TR-S-E reliable?
The price and inventory of HZK24TR-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 HZK24TR-S-E is usually 5 days.
3.What payment methods are accepted for HZK24TR-S-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZK24TR-S-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZK24TR-S-E?
HZK24TR-S-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZK24TR-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 HZK24TR-S-E?
For technical support, including HZK24TR-S-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZK24TR-S-E requirements.
6.How does Aetrix verify that HZK24TR-S-E is sourced from the original manufacturer or authorized distributors?
All HZK24TR-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 HZK24TR-S-E meets industry standards.
7.What is the process for return or replacement of HZK24TR-S-E?
All HZK24TR-S-E units undergo pre-shipment inspection (PSI). If there is an issue with HZK24TR-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 HZK24TR-S-E part is unused and in its original packaging.
Return procedure for HZK24TR-S-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZK24TR-S-E Tags
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MM5Z5V1ST1G
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