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Renesas HZS4.3NB3TD-E
- Part No.:
- HZS4.3NB3TD-E
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4.3NB3TD-E.pdf
- Description:
- DIODE ZENER 0.4W
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
HZS4.3NB3TD-E from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power stabilized power supplies. It delivers a nominal zener voltage of 4.34 V to 4.53 V at 5 mA test current, with dynamic resistance of 120 Ω max and reverse leakage current ≤5 μA at 1.0 V, housed in a standard MHD (JEITA GRZZ0002ZC-A) axial lead package.
For engineers reviewing the HZS4.3NB3TD-E datasheet, HZS4.3NB3TD-E pinout, HZS4.3NB3TD-E application, or HZS4.3NB3TD-E equivalent, this device serves as a compact, high-stability reference element in analog sensing circuits, microcontroller reset supervision, and low-current bias networks where tight voltage tolerance and low temperature drift are required.
Technical Context
The HZS4.3NB3TD-E operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds its zener threshold. Its junction temperature rating of 200°C supports operation in thermally constrained environments.
Designed for 5 mm-pitch automated insertion, it features low zener impedance and low leakage-key for minimizing error in precision reference paths. The B3 grade specifies tighter zener voltage tolerance (±2.2% typical) versus B1/B2 variants, enabling higher accuracy in calibration-critical applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.34 V to 4.53 V at IZ = 5 mA - defines precise regulation point for reference and clamp functions |
| Dynamic Resistance (rd) | ≤120 Ω at IZ = 5 mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage Current (IR) | ≤5 μA at VR = 1.0 V - enables low-error biasing in high-impedance analog nodes |
| Power Dissipation (Pd) | 400 mW - supports continuous operation up to ~93 mA at 4.3 V without heatsinking |
| Junction Temperature (Tj) | 200°C - allows reliable use in industrial ambient conditions up to +125°C with derating |
| Zener Voltage Tempco (γZ) | ≈−0.02 mV/°C near 4.3 V - provides low thermal drift for stable references over temperature |
Pinout & Package
Package: MHD (JEITA GRZZ0002ZC-A), axial-leaded, 2.0 mm diameter × 26.0 mm length, 0.4 mm lead diameter, 5 mm pitch compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener terminal with black band marking | Connected to regulated voltage node; reverse-biased during regulation |
| 2 (Anode) | Reference/ground terminal | Tied to circuit common; completes shunt path for excess current |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 120 Ω max ensures <1 mV output shift per 100 μA load change at regulation point |
| B3-grade voltage tolerance | ±2.2% (4.34–4.53 V) enables direct replacement in designs requiring tighter than ±5% specs |
| 400 mW power rating | Supports 93 mA max zener current at 4.3 V - sufficient for sensor excitation and MCU reset circuits |
| 200°C junction rating | Permits full-rated operation in sealed enclosures or near heat sources without derating below +125°C ambient |
| 5 mm pitch compatibility | Enables high-speed automated insertion on legacy and modern PCB assembly lines without retooling |
Applications
| Microcontroller Reset Circuit | Analog Sensor Reference |
|---|---|
Use Scenario: Providing a stable 4.3 V threshold to trigger reset when supply drops below safe operating level. IC Role / Device Role / Timing Role: Shunt voltage reference defining reset assertion voltage for supervisory ICs or discrete comparator inputs. Use Value: Tight B3 tolerance ensures consistent reset point across temperature and unit-to-unit variation, reducing field failures. |
Use Scenario: Supplying excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in portable instrumentation. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage reference source for ratiometric measurement systems. Use Value: 120 Ω dynamic resistance minimizes loading-induced error; −0.02 mV/°C tempco maintains <0.5% reference error from −40°C to +85°C. |
| Low-Power Voltage Clamp | LED Bias Stabilization |
Use Scenario: Protecting ADC input pins from overvoltage transients in battery-powered data loggers. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input to 4.53 V maximum during surge events. Use Value: 400 mW rating absorbs short-duration energy spikes without degradation; low leakage avoids signal path interference. |
Use Scenario: Stabilizing forward voltage for indicator LEDs in automotive control panels with wide supply variation (9–16 V). IC Role / Device Role / Timing Role: Constant-voltage shunt regulating LED current via series resistor. Use Value: Predictable 4.4 V regulation enables fixed-resistor current setting with ±2% accuracy across production lots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A (ON Semiconductor) | Zener voltage 5.1 V ±5%, Pd = 1 W, DO-41 package, rd = 17 Ω | Higher power and lower impedance but 18% higher voltage - unsuitable for 4.3 V–specific thresholds | Select only if system requires ≥5.1 V reference and can accommodate larger DO-41 footprint and higher thermal mass. |
| BZX55-C4V3 (Vishay) | Zener voltage 4.3 V ±5%, Pd = 500 mW, DO-35 package, rd = 90 Ω | Same nominal voltage but wider tolerance and different package - not drop-in for MHD board layout | Acceptable for new designs where DO-35 footprint is available and ±5% voltage tolerance is acceptable. |
Compared with 1N4733A and BZX55-C4V3, the HZS4.3NB3TD-E offers tighter B3-grade voltage tolerance (±2.2%), MHD axial package optimized for 5 mm pitch insertion, and a balance of 400 mW rating and 120 Ω impedance ideal for space-constrained, precision low-power regulation.
Availability
HZS4.3NB3TD-E is available at Aetrix Electronics and suitable for microcontroller reset circuits, analog sensor references, low-power voltage clamps, and LED bias stabilization requiring stable component supply and long-term obsolescence management.
Supply support for HZS4.3NB3TD-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 HZS-N Series was developed specifically for high-reliability, low-power voltage stabilization in cost-sensitive industrial and consumer equipment, emphasizing manufacturability, thermal robustness, and tight parametric grading.
FAQ
What is the exact zener voltage range for HZS4.3NB3TD-E?
The HZS4.3NB3TD-E has a guaranteed zener voltage range of 4.34 V to 4.53 V when tested at 5 mA (IZ = 5 mA), corresponding to its B3 grade specification. This 4.4% total span reflects tighter tolerance than B1/B2 grades in the same series and is confirmed in the Renesas REJ03G0185-0300 datasheet, page 2.
Is HZS4.3NB3TD-E RoHS compliant?
Yes, HZS4.3NB3TD-E meets EU RoHS Directive requirements. Renesas confirms environmental compliance for the HZS-N Series in official product documentation and supports material declarations upon request. No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed allowable limits.
What is the maximum continuous power dissipation for HZS4.3NB3TD-E?
The HZS4.3NB3TD-E has a maximum power dissipation (Pd) of 400 mW at Ta = 25°C. Derating is required above 25°C ambient, with full rating maintained up to approximately 93 mA at 4.3 V. Power capability decreases linearly to zero at 175°C storage temperature, per the absolute maximum ratings table.
Can HZS4.3NB3TD-E be used in automotive applications?
HZS4.3NB3TD-E is classified as "Standard" quality grade per Renesas documentation and is intended for computers, office equipment, and industrial robots-not automotive or safety-critical systems. For automotive use, Renesas offers AEC-Q200 qualified alternatives; HZS4.3NB3TD-E must not be deployed in vehicle subsystems without explicit written approval.
What does the "TD-E" suffix indicate in HZS4.3NB3TD-E?
The "TD-E" suffix denotes tape-and-reel packaging per JEDEC standard J-STD-020, with embossed carrier tape (E), 2 mm pitch, and 2,000 units per reel. This format supports automated SMT placement equipment and is distinct from bulk or ammo-pack variants of the same HZS4.3NB3 base part.
HZS4.3NB3TD-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:
- -
HZS4.3NB3TD-E FAQ
1.How can I place an order for HZS4.3NB3TD-E through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4.3NB3TD-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 HZS4.3NB3TD-E reliable?
The price and inventory of HZS4.3NB3TD-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4.3NB3TD-E is usually 5 days.
3.What payment methods are accepted for HZS4.3NB3TD-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4.3NB3TD-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4.3NB3TD-E?
HZS4.3NB3TD-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4.3NB3TD-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 HZS4.3NB3TD-E?
For technical support, including HZS4.3NB3TD-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4.3NB3TD-E requirements.
6.How does Aetrix verify that HZS4.3NB3TD-E is sourced from the original manufacturer or authorized distributors?
All HZS4.3NB3TD-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 HZS4.3NB3TD-E meets industry standards.
7.What is the process for return or replacement of HZS4.3NB3TD-E?
All HZS4.3NB3TD-E units undergo pre-shipment inspection (PSI). If there is an issue with HZS4.3NB3TD-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 HZS4.3NB3TD-E part is unused and in its original packaging.
Return procedure for HZS4.3NB3TD-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZS4.3NB3TD-E Tags
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