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Renesas HZU4ALL-JTLF
- Part No.:
- HZU4ALL-JTLF
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU4ALL-JTLF.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:78,000
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Product details
Overview
HZU4ALL-JTLF from Renesas Electronics is a silicon planar Zener diode in ultra-small resin package (URP/SC-76A) designed for precision voltage stabilization in low-power analog and power-supply reference circuits, with nominal Zener voltage 4.3 V (B3 grade), 10 µA maximum reverse current at 1.0 V, 130 Ω dynamic resistance at 5 mA, and 200 mW power dissipation.
For engineers reviewing the HZU4ALL-JTLF datasheet, HZU4ALL-JTLF pinout, HZU4ALL-JTLF application, or HZU4ALL-JTLF equivalent, this device serves as a surface-mount voltage reference in space-constrained DC-DC feedback paths, sensor biasing networks, and overvoltage protection clamps where tight tolerance and thermal stability are required.
Technical Context
HZU4ALL-JTLF operates as a two-terminal shunt regulator with cathode-anode polarity, optimized for stable reverse-bias conduction at its specified Zener voltage. Its URP package enables high-density PCB placement while maintaining thermal performance up to 150°C junction temperature.
The diode exhibits a Zener voltage range of 4.28 V to 4.48 V (B3 grade) at 5 mA test current, with temperature coefficient near zero crossing (~0 mV/°C) per Figure 2, and is rated for storage between –55°C and +150°C - supporting industrial-grade environmental resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.28 V to 4.48 V at IZ = 5 mA - defines precise clamping threshold for reference and protection circuits |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C - sets maximum continuous power handling before thermal derating |
| Dynamic Resistance (rd) | 130 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to load current changes |
| Reverse Current (IR) | ≤10 µA at VR = 1.0 V - ensures minimal leakage in standby or pre-breakdown conditions |
| Junction Temperature (Tj) | 150°C maximum - defines upper thermal limit for reliable long-term operation |
| Package | URP (SC-76A), 0.8 mm × 0.8 mm footprint - enables 0201-class board area efficiency with standard SMT reflow compatibility |
Pinout & Package
Package: Ultra Small Resin Package (URP), JEITA code SC-76A, Renesas code PTSP0002ZA-A, dimensions 0.8 mm × 0.8 mm × 0.45 mm (max height), mass 0.004 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node in shunt regulation; carries reverse current during Zener conduction |
| 2 | Anode | Connected to lower-potential node (typically ground or return path); completes bias circuit for voltage reference |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small URP package | 0.8 mm × 0.8 mm footprint supports high-density layout in portable and IoT edge devices |
| Taped delivery (TRF) | 3,000 pcs/reel format enables automated pick-and-place assembly without manual handling |
| B3 grade Zener tolerance | ±2.3% total variation (4.28–4.48 V) provides tighter regulation than B/B1/B2 variants for critical references |
| Pulse-tested characterization | All electrical specs validated using 40 ms pulse width to minimize self-heating error during test |
Applications
| Power Supply Feedback Reference | Sensor Biasing Network |
|---|---|
Use Scenario: Stabilizing feedback voltage in adjustable DC-DC converters (e.g., buck regulators with TL431-like topology). IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise output setpoint via resistor divider. Use Value: Enables ±1% output regulation accuracy with minimal board area and no external op-amp. |
Use Scenario: Providing stable excitation voltage to resistive sensors (e.g., RTDs, strain gauges) in data acquisition front-ends. IC Role / Device Role / Timing Role: Low-drift, low-noise bias source replacing larger three-terminal references. Use Value: Reduces thermal EMF and layout sensitivity compared to discrete resistor-divider + capacitor solutions. |
| Overvoltage Clamp Protection | Microcontroller I/O Level Translation |
Use Scenario: Protecting 3.3 V or 5 V MCU GPIO pins from transient surges on external signal lines. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to ≤4.48 V before damage threshold. Use Value: Responds within nanoseconds to ESD or inductive kick events without requiring series impedance. |
Use Scenario: Translating 5 V logic signals to 3.3 V tolerant inputs using passive Zener clamping. IC Role / Device Role / Timing Role: Bidirectional level shifter with inherent current limiting via series resistor. Use Value: Eliminates need for active translators in low-speed control interfaces (e.g., UART, I²C pull-up). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3 (Diodes Inc.) | Same 4.3 V nominal, SOT-23 package (larger than URP), 350 mW Pd, ±5% tolerance (vs. B3's ±2.3%) | Higher power margin but 3× footprint; less suitable for ultra-dense layouts | Select when higher surge energy handling is needed and board space allows SOT-23 |
| MMSZ4685 (ON Semiconductor) | 4.3 V nominal, SOD-123 package, 500 mW Pd, ±5% tolerance, 150 Ω rd | Greater thermal mass and power headroom; not compatible with 0201 placement equipment | Prefer for industrial environments with wide ambient swings where derated power matters more than size |
Compared with BZX84-C4V3 and MMSZ4685, HZU4ALL-JTLF delivers tighter voltage tolerance and smallest footprint - making it optimal for miniaturized battery-powered systems where regulation precision and PCB real estate are both constrained.
Availability
HZU4ALL-JTLF is available at Aetrix Electronics and suitable for power supply feedback reference, sensor biasing network, and overvoltage clamp protection requiring stable component supply across prototyping, NPI, and volume production phases.
Supply support for HZU4ALL-JTLF 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 manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure applications.
HZU4ALL-JTLF belongs to the HZU Series silicon planar Zener diodes - engineered specifically for compact, high-reliability voltage stabilization in surface-mount power management and signal conditioning circuits.
FAQ
What is the Zener voltage tolerance for HZU4ALL-JTLF?
HZU4ALL-JTLF is specified as B3 grade, with a Zener voltage range of 4.28 V to 4.48 V at 5 mA test current - representing ±2.3% tolerance around the nominal 4.3 V value. This tighter tolerance than B/B1/B2 grades makes HZU4ALL-JTLF suitable for applications demanding higher reference accuracy without trimming.
Does HZU4ALL-JTLF require a series current-limiting resistor in operation?
Yes, HZU4ALL-JTLF must be used with an external series resistor to limit reverse current and prevent thermal runaway. The resistor value is calculated based on input voltage, desired Zener current (e.g., 5 mA), and the diode's VZ; typical designs use 1–10 kΩ for 5–12 V supplies. Without this resistor, HZU4ALL-JTLF cannot sustain stable regulation.
Is HZU4ALL-JTLF RoHS compliant and lead-free?
Yes, HZU4ALL-JTLF conforms to the EU RoHS Directive and is lead-free. Renesas confirms compliance in its environmental documentation, and the device uses matte tin plating on terminals with no intentionally added restricted substances - meeting IPC/JEDEC J-STD-609A Class 3 marking requirements.
What is the thermal derating behavior of HZU4ALL-JTLF above 25°C ambient?
HZU4ALL-JTLF follows the derating curve in Figure 3 of its datasheet: power dissipation linearly decreases from 200 mW at 25°C to zero at 150°C ambient. At 75°C, allowable Pd drops to ~130 mW; at 100°C, to ~90 mW. Designers must apply this curve when sizing heat paths or estimating worst-case power in enclosed environments.
Can HZU4ALL-JTLF replace a 3-terminal voltage reference like TL431 in feedback loops?
No - HZU4ALL-JTLF is a 2-terminal shunt Zener diode and lacks the internal op-amp, adjustable reference, and high-impedance cathode of TL431. It can serve as a fixed-voltage alternative only in simple feedback configurations where the TL431's programmability and gain are unnecessary, and where the 4.3 V setpoint matches system requirements.
HZU4ALL-JTLF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -
HZU4ALL-JTLF FAQ
1.How can I place an order for HZU4ALL-JTLF through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU4ALL-JTLF 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 HZU4ALL-JTLF reliable?
The price and inventory of HZU4ALL-JTLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU4ALL-JTLF is usually 5 days.
3.What payment methods are accepted for HZU4ALL-JTLF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU4ALL-JTLF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU4ALL-JTLF?
HZU4ALL-JTLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU4ALL-JTLF 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 HZU4ALL-JTLF?
For technical support, including HZU4ALL-JTLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU4ALL-JTLF requirements.
6.How does Aetrix verify that HZU4ALL-JTLF is sourced from the original manufacturer or authorized distributors?
All HZU4ALL-JTLF 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 HZU4ALL-JTLF meets industry standards.
7.What is the process for return or replacement of HZU4ALL-JTLF?
All HZU4ALL-JTLF units undergo pre-shipment inspection (PSI). If there is an issue with HZU4ALL-JTLF, 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 HZU4ALL-JTLF part is unused and in its original packaging.
Return procedure for HZU4ALL-JTLF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZU4ALL-JTLF Tags
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MM5Z5V1ST1G
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