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Renesas HZU4.3B1TRF-E
- Part No.:
- HZU4.3B1TRF-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZU4.3B1TRF-E.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:48,000
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Product details
Overview
HZU4.3B1TRF-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage stabilization in low-power analog and digital supply rails. It delivers a nominal Zener voltage of 4.3 V (min 4.42 V, max 4.61 V at IZ = 5 mA), with dynamic resistance of 130 Ω, power dissipation of 200 mW, and operates within –55°C to +150°C storage range - commonly used in reference voltage generation for ADCs, LDO feedback networks, and overvoltage protection circuits.
For engineers reviewing the HZU4.3B1TRF-E datasheet, HZU4.3B1TRF-E pinout, HZU4.3B1TRF-E application, or HZU4.3B1TRF-E equivalent, key selection criteria include its URP (Ultra small Resin Package) footprint, cathode-anode polarity marking, 5 mA test current specification, and ±2% Zener voltage tolerance band (Grade B1).
Technical Context
This Zener diode employs a silicon planar junction structure optimized for stable reverse-breakdown behavior under DC and pulsed conditions (PW = 40 ms). Its electrical characteristics are specified at Ta = 25°C with defined test currents and voltage limits, and thermal derating follows Fig. 3 - power dissipation drops linearly above 25°C ambient.
The device exhibits a negative temperature coefficient (γZ) near zero for 4.3 V grade, minimizing drift across operating temperature. It is delivered in tape-and-reel format (TRF, 3,000 pcs/reel) with laser-marked cathode identification on the URP package surface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.42 V to 4.61 V at IZ = 5 mA - defines tight regulation window for 4.3 V nominal reference |
| Dynamic Resistance (rd) | 130 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 DC power before thermal derating applies |
| Reverse Current (IR) | 10 μA max at VR = 1.0 V - ensures low leakage in standby or high-impedance bias networks |
| Junction Temperature (Tj) | 150°C max - supports operation in thermally constrained PCB layouts and industrial environments |
| Package | URP (SC-76A) - 0.8 mm × 0.8 mm × 0.45 mm surface-mount footprint compatible with fine-pitch reflow assembly |
Pinout & Package
URP (Ultra small Resin Package) is a miniature surface-mount plastic package with two terminals: cathode (marked side) and anode. Dimensions: 0.8 mm × 0.8 mm body, 0.45 mm height, 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; polarity mark on package surface identifies this terminal |
| 2 | Anode | Connected to ground or lower-potential rail; reverse-biased configuration enables Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Grade-B1 Zener tolerance | ±2.2% voltage spread (4.42–4.61 V) enables tighter reference accuracy than standard-grade variants |
| Low-profile URP package | 0.8 mm × 0.8 mm footprint reduces PCB area by >50% vs. SOD-323, supporting ultra-compact portable designs |
| Pulse-tested characterization | Electrical specs validated using 40 ms pulses - ensures reliability under transient overvoltage stress |
| Tape-and-reel delivery (TRF) | 3,000 pcs/reel format supports automated SMT placement without manual handling or static risk |
Applications
| ADC Reference Voltage | LDO Feedback Node |
|---|---|
Use Scenario: Providing stable 4.3 V reference for 12-bit SAR ADCs in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Zener diode acts as shunt voltage reference, replacing higher-cost bandgap ICs where moderate accuracy suffices. Use Value: Enables <±0.5% full-scale error budget with minimal external components and no quiescent current overhead. | Use Scenario: Biasing the feedback divider of a 5 V fixed-output LDO to achieve adjustable 4.3 V output. IC Role / Device Role / Timing Role: Functions as precision voltage clamp in resistor-divider network to set output regulation point. Use Value: Delivers stable setpoint despite input ripple or load transients, improving output regulation by 15–20 mV over resistor-only dividers. |
| Overvoltage Clamp | Microcontroller Reset Circuit |
Use Scenario: Protecting 3.3 V I/O pins against ESD or surge events exceeding 5 V. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 4.61 V to divert excess energy to ground. Use Value: Limits transient voltage to safe levels below absolute maximum ratings, preventing latch-up or gate oxide damage. | Use Scenario: Generating clean reset pulse for ARM Cortex-M0+ microcontrollers during power-up sequencing. IC Role / Device Role / Timing Role: Supplies threshold-determined delay via RC network tied to Zener-clamped voltage node. Use Value: Ensures reliable reset assertion until VCC stabilizes above 4.42 V, eliminating brown-out glitches in firmware initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3LT1G | 4.3 V nominal, ±5% tolerance (4.06–4.54 V), SOT-23 package (1.3 mm × 1.3 mm), 350 mW Pd | Higher power margin but larger footprint; less precise voltage control due to wider tolerance | Select when board space allows larger package and higher surge capability is needed |
| MMSZ4685T1G | 4.3 V nominal, ±5% tolerance (4.06–4.54 V), SOD-123 package (1.8 mm × 1.4 mm), 500 mW Pd | Higher power rating and thermal mass, but 2.5× larger area than URP; not suitable for ultra-dense layouts | Prefer for high-reliability industrial systems requiring extended surge endurance and legacy footprint compatibility |
Compared with BZX84-C4V3LT1G and MMSZ4685T1G, HZU4.3B1TRF-E offers superior voltage accuracy (±2.2% vs. ±5%) and smallest PCB footprint (0.64 mm²), making it optimal for space-constrained, precision-biased applications where tight regulation outweighs raw power handling.
Availability
HZU4.3B1TRF-E is available at Aetrix Electronics and suitable for voltage reference design, LDO feedback networks, and overvoltage protection circuits requiring stable component supply and consistent Grade-B1 Zener performance.
Supply support for HZU4.3B1TRF-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 manufacturer specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and consumer applications.
The HZU Series belongs to Renesas' discrete Zener diode product line, engineered specifically for compact, high-accuracy voltage stabilization in space- and power-sensitive embedded systems.
FAQ
What is the Zener voltage tolerance for HZU4.3B1TRF-E?
HZU4.3B1TRF-E has a Zener voltage range of 4.42 V to 4.61 V at IZ = 5 mA, corresponding to a ±2.2% tolerance around the nominal 4.3 V rating. This Grade-B1 specification is tighter than standard B-grade parts (e.g., HZU4.3B3: 4.28–4.48 V) and supports higher-accuracy reference designs without external trimming.
Does HZU4.3B1TRF-E support reflow soldering?
Yes, HZU4.3B1TRF-E uses the URP (SC-76A) package, which is qualified for standard lead-free reflow profiles per J-STD-020. Its plastic body and tin-plated terminals withstand peak temperatures up to 260°C, and the 0.65 mm lead pitch is compatible with standard stencil apertures and placement accuracy.
What is the maximum reverse current for HZU4.3B1TRF-E at 1.0 V?
The maximum reverse current (IR) for HZU4.3B1TRF-E is 10 μA when tested at VR = 1.0 V. This low leakage ensures minimal parasitic loading in high-impedance bias networks and preserves accuracy in precision reference applications where current draw must remain sub-microamp.
Can HZU4.3B1TRF-E replace HZU4.3B3 in existing designs?
HZU4.3B1TRF-E is not a direct drop-in replacement for HZU4.3B3 due to different Zener voltage ranges: HZU4.3B3 specifies 4.28–4.48 V, while HZU4.3B1TRF-E is 4.42–4.61 V. Substituting may shift regulation points by up to 130 mV; verify circuit margin and stability before interchange, especially in feedback-critical applications.
Is HZU4.3B1TRF-E RoHS compliant and halogen-free?
Yes, HZU4.3B1TRF-E complies with EU RoHS Directive 2011/65/EU and is halogen-free per Renesas' material declarations. The URP package uses bromine-free epoxy resin, and all metallization meets Pb-free soldering requirements without exemptions.
HZU4.3B1TRF-E 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:
- -
HZU4.3B1TRF-E FAQ
1.How can I place an order for HZU4.3B1TRF-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZU4.3B1TRF-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 HZU4.3B1TRF-E reliable?
The price and inventory of HZU4.3B1TRF-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZU4.3B1TRF-E is usually 5 days.
3.What payment methods are accepted for HZU4.3B1TRF-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZU4.3B1TRF-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZU4.3B1TRF-E?
HZU4.3B1TRF-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZU4.3B1TRF-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 HZU4.3B1TRF-E?
For technical support, including HZU4.3B1TRF-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZU4.3B1TRF-E requirements.
6.How does Aetrix verify that HZU4.3B1TRF-E is sourced from the original manufacturer or authorized distributors?
All HZU4.3B1TRF-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 HZU4.3B1TRF-E meets industry standards.
7.What is the process for return or replacement of HZU4.3B1TRF-E?
All HZU4.3B1TRF-E units undergo pre-shipment inspection (PSI). If there is an issue with HZU4.3B1TRF-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 HZU4.3B1TRF-E part is unused and in its original packaging.
Return procedure for HZU4.3B1TRF-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZU4.3B1TRF-E Tags
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