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Renesas HZU24B3TRF-E
- Part No.:
- HZU24B3TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU24B3TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:35,995
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Product details
Overview
HZU24B3TRF-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage stabilization in low-power analog and reference circuits, featuring a nominal Zener voltage of 24.54 V to 25.57 V at 5 mA, 60 Ω dynamic resistance, and 200 mW power dissipation in an ultra-small URP surface-mount package. It serves as a stable shunt reference in power supply feedback loops, sensor biasing networks, and overvoltage protection clamps.
For engineers reviewing the HZU24B3TRF-E datasheet, HZU24B3TRF-E pinout, HZU24B3TRF-E application, or HZU24B3TRF-E equivalent, key selection criteria include its B3-grade voltage tolerance (±2.1% at 25°C), low temperature coefficient (~+0.04 %/°C near 24 V), 2 mA minimum test current for reverse leakage validation, and compatibility with reflow soldering due to its JEITA SC-76A-compliant URP package.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ distribution across the B3 grade band. Its planar junction construction ensures stable long-term voltage regulation and low noise performance suitable for precision analog references.
The device exhibits a positive temperature coefficient of approximately +0.04 %/°C at 24 V, enabling predictable drift behavior in ambient temperature variations from –55°C to +150°C. Its 200 mW power rating is derated linearly above 25°C per Fig.3, supporting operation up to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24.54 V to 25.57 V at IZ = 5 mA - defines stable regulation point for feedback or reference use |
| Dynamic Resistance (rd) | 60 Ω max at IZ = 5 mA - determines output impedance and load regulation sensitivity |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating |
| Reverse Current (IR) | 2 µA max at VR = 19.0 V - specifies leakage level below breakdown, critical for low-current bias networks |
| Junction Temperature (Tj) | 150°C max - defines absolute thermal limit for reliable long-term operation |
| Package | URP (SC-76A) - 1.55 mm × 0.80 mm × 0.45 mm surface-mount footprint enabling high-density PCB layouts |
| Temperature Coefficient (γZ) | +0.04 %/°C typical at 24 V - enables predictable VZ drift compensation in temperature-varying environments |
Pinout & Package
Ultra-small Resin Package (URP), JEITA code SC-76A, dimensions 1.55 mm × 0.80 mm × 0.45 mm, weight 0.004 g, compatible with standard SMT reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to circuit ground or lower potential; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B3 voltage tolerance | ±2.1% VZ spread (24.54–25.57 V) - enables tighter system-level voltage accuracy without external trimming |
| Low dynamic resistance | 60 Ω max - minimizes output voltage variation under changing load current conditions |
| Ultra-compact URP package | 1.55 mm × 0.80 mm footprint - supports miniaturized designs in space-constrained consumer and portable electronics |
| Taped and reel packaging | TRF taping (3,000 pcs/reel) - ensures compatibility with high-speed automated SMT placement equipment |
| High junction temperature rating | 150°C max Tj - allows reliable operation in thermally demanding industrial and automotive under-hood environments |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Used in the optocoupler feedback path of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise error signal to primary-side controller. Use Value: Maintains ±1.5% output regulation over line/load/temperature with no active components required. |
Use Scenario: Supplies stable excitation voltage to resistive temperature detectors (RTDs) in industrial process sensors. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source for ratiometric measurement circuits. Use Value: Enables <10 ppm/°C system-level temperature error by minimizing VZ drift contribution. |
| Overvoltage Clamp Protection | ADC Reference Stabilization |
Use Scenario: Placed across microcontroller I/O pins to clamp transient surges exceeding 26 V. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting ESD or inductive kick energy to ground. Use Value: Limits pin voltage to ≤25.6 V during 2-kV HBM events while maintaining sub-µA standby leakage. |
Use Scenario: Provides stable 24.5 V reference for 16-bit SAR ADCs in data acquisition modules. IC Role / Device Role / Timing Role: Precision analog reference replacing higher-cost bandgap ICs in cost-sensitive designs. Use Value: Delivers <0.05% initial accuracy and <30 ppm/°C TC, meeting ENOB >14.5 bit requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage stabilization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5262BT1G | 24 V nominal, ±5% tolerance (B-grade), 30 Ω rd, SOD-123 package (2.7 mm × 1.6 mm) | Larger footprint; looser voltage tolerance; lower rd improves regulation but requires layout revision | Select when board space permits larger package and ±5% VZ is acceptable for cost-driven designs. |
| BZX84-C24 | 24 V nominal, ±5% tolerance, 80 Ω rd, SOT-23 package (3.0 mm × 1.4 mm) | Higher dynamic resistance degrades load regulation; wider VZ spread increases calibration burden | Choose only for legacy compatibility where URP footprint cannot be accommodated and tighter regulation is not required. |
Compared with MMSZ5262BT1G and BZX84-C24, the HZU24B3TRF-E delivers superior voltage accuracy (±2.1% vs. ±5%), smaller PCB area (65% less than SOD-123), and optimized thermal performance for high-density layouts-making it preferred for next-generation compact, precision analog systems.
Availability
HZU24B3TRF-E is available at Aetrix Electronics and suitable for power supply feedback references, sensor biasing networks, overvoltage clamp protection, and ADC reference stabilization requiring stable component supply and consistent parametric performance across production lots.
Supply support for HZU24B3TRF-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 is a global semiconductor leader delivering microcontrollers, analog power, and timing solutions for industrial, automotive, and infrastructure markets.
The HZU Series belongs to Renesas' precision discrete portfolio, engineered specifically for high-stability voltage reference and clamping applications in space-constrained, thermally demanding environments.
FAQ
What is the Zener voltage range for HZU24B3TRF-E at 5 mA test current?
The HZU24B3TRF-E has a guaranteed Zener voltage range of 24.54 V to 25.57 V when tested at IZ = 5 mA, corresponding to the B3 grade specification. This ±2.1% tolerance ensures tight regulation without post-manufacturing trimming and is validated per Renesas R07DS0423EJ1000 Rev.10.00.
Is HZU24B3TRF-E suitable for reflow soldering processes?
Yes, the HZU24B3TRF-E uses an ultra-small resin package (URP, JEITA SC-76A) qualified for standard lead-free reflow profiles. Its 0.45 mm profile and glass epoxy molding compound withstand peak temperatures up to 260°C, making it fully compatible with IPC-J-STD-020-compliant assembly processes.
What is the maximum reverse leakage current for HZU24B3TRF-E at 19.0 V?
The HZU24B3TRF-E specifies a maximum reverse leakage current (IR) of 2 µA at VR = 19.0 V, as defined in the Electrical Characteristics table on page 2 of the datasheet. This low leakage supports accurate biasing in high-impedance sensor interfaces and low-power standby circuits.
Does HZU24B3TRF-E have a specified temperature coefficient?
Yes, the HZU24B3TRF-E exhibits a typical temperature coefficient (γZ) of +0.04 %/°C near 24 V, as shown in Fig.2 of the datasheet. This positive, low-drift characteristic enables predictable voltage shift over temperature and simplifies compensation in precision analog designs.
What is the power dissipation derating behavior of HZU24B3TRF-E above 25°C?
The HZU24B3TRF-E's 200 mW power dissipation is linearly derated above 25°C ambient, with full derating to zero at 150°C, as illustrated in Fig.3. The derating slope is –2.0 mW/°C, allowing accurate thermal design for continuous operation in industrial enclosures up to 105°C ambient.
HZU24B3TRF-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:
- -
HZU24B3TRF-E FAQ
1.How can I place an order for HZU24B3TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU24B3TRF-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 HZU24B3TRF-E reliable?
The price and inventory of HZU24B3TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU24B3TRF-E is usually 5 days.
3.What payment methods are accepted for HZU24B3TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU24B3TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU24B3TRF-E?
HZU24B3TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU24B3TRF-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 HZU24B3TRF-E?
For technical support, including HZU24B3TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU24B3TRF-E requirements.
6.How does Aetrix verify that HZU24B3TRF-E is sourced from the original manufacturer or authorized distributors?
All HZU24B3TRF-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 HZU24B3TRF-E meets industry standards.
7.What is the process for return or replacement of HZU24B3TRF-E?
All HZU24B3TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU24B3TRF-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 HZU24B3TRF-E part is unused and in its original packaging.
Return procedure for HZU24B3TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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