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Renesas HZS4.3NB2JRX
- Part No.:
- HZS4.3NB2JRX
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZS4.3NB2JRX.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:12,500
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Product details
Overview
HZS4.3NB2JRX from ROHM Semiconductor is a silicon epitaxial planar Zener diode designed for precision voltage regulation in stabilized power supplies, with a nominal zener voltage of 4.3 V (min 4.3 V / max 4.5 V), 5 mA test current, 1.0 µA maximum reverse leakage at 1.0 V, 100 Ω dynamic impedance, and 400 mW power dissipation.
For engineers reviewing the HZS4.3NB2JRX datasheet, HZS4.3NB2JRX pinout, HZS4.3NB2JRX application, or HZS4.3NB2JRX equivalent, key selection criteria include zener voltage tolerance (±0.2 V), low dynamic impedance for stable regulation under load transients, thermal stability up to 200°C junction temperature, and compatibility with 5 mm-pitch automated insertion equipment.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining a stable reference voltage across its cathode-anode terminals when reverse-biased above its breakdown threshold. Its epitaxial planar construction ensures tight VZ distribution and low temperature coefficient - typical ±0.05 %/°C near 4.3 V - enabling reliable performance in low-power biasing and feedback networks.
Rated for 400 mW DC power dissipation at 25°C ambient, derating follows a linear curve to zero at 180°C board temperature (per Fig.3), and it supports operation from −55°C to +175°C storage range. Reverse leakage remains ≤1.0 µA at VR = 1.0 V, confirming suitability for low-current reference paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.3 V min / 4.5 V max at IZ = 5 mA - defines regulated output range in feedback loops |
| Dynamic Impedance (rd) | 100 Ω max at IZ = 5 mA - limits output voltage variation under load current changes |
| Reverse Leakage (IR) | ≤1.0 µA at VR = 1.0 V - ensures minimal quiescent current in high-impedance bias networks |
| Power Dissipation (Pd) | 400 mW at Ta = 25°C - sets maximum continuous power handling on standard FR-4 PCB |
| Junction Temperature (Tj) | 200°C max - enables use in thermally constrained industrial or automotive under-hood environments |
| Storage Temperature | −55°C to +175°C - supports wide-range logistics and long-term reliability in harsh storage conditions |
Pinout & Package
Package: DO-35 (glass axial, 5 mm pitch, 2.5 mm body diameter, 3 mm length). Standard through-hole mounting with cathode band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | High-side reference terminal | Connected to regulated node; carries full load current in shunt configuration |
| 2 (Anode) | Low-side return terminal | Connected to ground or common reference; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Low zener impedance | 100 Ω max ensures <10 mV output shift per 1 mA load change at 5 mA bias |
| Tight VZ tolerance | ±0.2 V (4.3–4.5 V) enables accurate 5 V rail derivation without trimming |
| High-temperature operation | 200°C junction rating supports use in sealed enclosures or near heat sources |
| Automated insertion compatibility | 5 mm pitch and DO-35 outline allow direct placement on legacy high-speed inserters |
Applications
| Industrial Power Monitoring | LED Driver Reference |
|---|---|
Use Scenario: Voltage reference for analog-to-digital conversion of 24 V supply rails in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.3 V input to ADC voltage divider network. Use Value: Low 1.0 µA leakage prevents loading of high-impedance sensor signal paths upstream of the ADC. | Use Scenario: Current-setting reference in constant-current LED driver feedback loop for signage lighting. IC Role / Device Role / Timing Role: Zener element establishing precise 4.3 V threshold for op-amp error amplifier input. Use Value: 100 Ω dynamic impedance minimizes LED brightness drift across 10–100 mA output current range. |
| Automotive Cabin Control | IoT Sensor Biasing |
Use Scenario: Regulated bias source for microcontroller reset circuitry in HVAC control units. IC Role / Device Role / Timing Role: Standby-mode voltage clamp ensuring clean POR (power-on reset) trigger at 4.3 V. Use Value: −55°C to +175°C storage rating guarantees functionality after reflow soldering and under-hood thermal cycling. | Use Scenario: Low-power reference for MEMS accelerometer signal conditioning in battery-operated asset trackers. IC Role / Device Role / Timing Role: Precision shunt regulator supplying stable 4.3 V to instrumentation amplifier stage. Use Value: 400 mW rating allows operation at 5 mA bias while maintaining <100 ppm/°C thermal drift over −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | 5.1 V nominal, 5% tolerance (4.85–5.35 V), 17 Ω rd, 1 W Pd | Higher voltage, higher power - unsuitable where 4.3 V exact reference is required | Select only if system design accommodates 5.1 V and requires higher surge capability |
| BZX55-C4V3 | 4.3 V nominal, ±5% tolerance (4.09–4.52 V), 90 Ω rd, 500 mW Pd | Wider VZ tolerance, higher power - acceptable where ±0.21 V variation is tolerable | Prefer when cost sensitivity outweighs need for tight 4.3–4.5 V window |
Compared with HZS4.3NB2JRX, the 1N4733A shifts regulation to 5.1 V and increases power margin but sacrifices voltage accuracy; the BZX55-C4V3 matches nominal voltage but trades tighter 4.3–4.5 V spec for ±5% tolerance and slightly lower dynamic impedance - making HZS4.3NB2JRX optimal for designs requiring guaranteed 4.3 V minimum under all operating conditions.
Availability
HZS4.3NB2JRX is available at Aetrix Electronics and suitable for industrial power monitoring, LED driver reference, automotive cabin control, and IoT sensor biasing requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for HZS4.3NB2JRX 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
ROHM Semiconductor is a Japanese semiconductor manufacturer specializing in analog, power, and sensor solutions for automotive, industrial, and consumer markets.
HZS4.3NB2JRX belongs to the HZS Series of precision Zener diodes engineered for stable voltage reference in compact, high-reliability power supply circuits - particularly where tight VZ tolerance and low dynamic impedance are critical.
FAQ
What is the exact zener voltage range for HZS4.3NB2JRX?
HZS4.3NB2JRX has a guaranteed zener voltage range of 4.3 V minimum to 4.5 V maximum when tested at IZ = 5 mA and Ta = 25°C. This 0.2 V window reflects Grade B2 specification per the HZS Series datasheet (ADE-208-120A(Z), Rev 1), and is tighter than standard ±5% Zeners, supporting precision feedback applications.
Is HZS4.3NB2JRX suitable for surface-mount assembly?
No, HZS4.3NB2JRX uses a DO-35 glass axial package with 5 mm lead pitch, designed exclusively for through-hole mounting and high-speed automatic insertion. It is not compatible with SMT reflow or pick-and-place processes. For SMT equivalents, consider ROHM's UDZS series Schottky/Zener devices in SOD-323 packages.
What is the maximum reverse leakage current for HZS4.3NB2JRX?
The maximum reverse leakage current for HZS4.3NB2JRX is 1.0 µA at VR = 1.0 V and Ta = 25°C. This low leakage ensures minimal current draw in high-impedance reference networks, preserving accuracy in battery-powered or low-quiescent-current designs where HZS4.3NB2JRX is deployed.
Can HZS4.3NB2JRX be used in automotive under-hood applications?
Yes, HZS4.3NB2JRX supports junction temperatures up to 200°C and storage from −55°C to +175°C, meeting requirements for non-safety-critical under-hood locations such as HVAC control modules. Its DO-35 package must be mounted with adequate copper pour and thermal relief to maintain Tj within limit under continuous 400 mW dissipation.
How does the dynamic impedance of HZS4.3NB2JRX affect regulation stability?
HZS4.3NB2JRX has a maximum dynamic impedance of 100 Ω at IZ = 5 mA. This value directly determines output voltage deviation: for example, a 2 mA change in load current causes ≤0.2 V shift. That stability makes HZS4.3NB2JRX suitable for feedback references where ripple rejection and line/load regulation are critical - unlike higher-rd Zeners that degrade regulation under varying loads.
HZS4.3NB2JRX 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:
- -
HZS4.3NB2JRX FAQ
1.How can I place an order for HZS4.3NB2JRX through Aetrix?
Please submit a Request for Quotation (RFQ) for HZS4.3NB2JRX 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 HZS4.3NB2JRX reliable?
The price and inventory of HZS4.3NB2JRX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZS4.3NB2JRX is usually 5 days.
3.What payment methods are accepted for HZS4.3NB2JRX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZS4.3NB2JRX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZS4.3NB2JRX?
HZS4.3NB2JRX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZS4.3NB2JRX 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 HZS4.3NB2JRX?
For technical support, including HZS4.3NB2JRX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZS4.3NB2JRX requirements.
6.How does Aetrix verify that HZS4.3NB2JRX is sourced from the original manufacturer or authorized distributors?
All HZS4.3NB2JRX 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 HZS4.3NB2JRX meets industry standards.
7.What is the process for return or replacement of HZS4.3NB2JRX?
All HZS4.3NB2JRX units undergo pre-shipment inspection (PSI). If there is an issue with HZS4.3NB2JRX, 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 HZS4.3NB2JRX part is unused and in its original packaging.
Return procedure for HZS4.3NB2JRX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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