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Renesas RKZ4.3BKV#P1
- Part No.:
- RKZ4.3BKV#P1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ4.3BKV#P1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:51,000
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Product details
Overview
RKZ4.3BKV#P1 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and power-supply feedback circuits. It delivers a nominal Zener voltage of 4.3 V (min 4.01 V, max 4.48 V) at 10 mA test current, with dynamic resistance of 130 Ω and ESD capability of ±30 kV (HBM), housed in the compact SRP-F surface-mount package.
For engineers reviewing the RKZ4.3BKV#P1 datasheet, RKZ4.3BKV#P1 pinout, RKZ4.3BKV#P1 application, or RKZ4.3BKV#P1 equivalent, key selection criteria include its tight 5% Zener voltage tolerance, low 700 mW power dissipation limit, flat-lead SRP-F footprint for high-density PCB layouts, and suitability for voltage reference, overvoltage clamping, and regulator error amplifier biasing in industrial and consumer power management systems.
Technical Context
The RKZ4.3BKV#P1 operates as a two-terminal voltage reference device relying on controlled reverse-biased avalanche breakdown. Its Zener voltage exhibits a temperature coefficient near zero (≈0 mV/°C) within the 4–6 V range, confirmed by Figure 2 in the datasheet, making it stable across ambient temperatures from –55°C to +150°C.
It is rated for 700 mW power dissipation when mounted on a standard 50 × 50 mm glass-epoxy board with 10 × 10 mm solder land, and supports ≤10 μA reverse leakage at VR = 1 V - enabling use in low-quiescent-current bias networks and precision shunt regulators where thermal drift and standby loss must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.01–4.48 V at IZ = 10 mA - defines regulated output voltage window for feedback loop references. |
| Dynamic Resistance (rd) | 130 Ω max at IZ = 10 mA - determines load regulation sensitivity and ripple rejection in shunt configurations. |
| Power Dissipation (Pd) | 700 mW at Ta = 25°C on standard PCB - sets maximum continuous power handling before thermal derating applies. |
| ESD Capability | ±30 kV per HBM (C = 150 pF, R = 330 Ω) - ensures robustness during automated SMT assembly and board handling. |
| Junction Temperature (Tj) | 150°C max - enables operation in sealed enclosures or near heat-generating components without derating. |
| Reverse Current (IR) | ≤10 μA at VR = 1 V - guarantees minimal leakage in high-impedance bias networks and sensor interfaces. |
Pinout & Package
The RKZ4.3BKV#P1 uses the SRP-F (Small Resin Package Flat lead) surface-mount package - a compact 2.5 mm × 1.2 mm outline with 0.6 mm height and gull-wing leads optimized for high-density layout and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated voltage node; reverse-bias terminal where Zener breakdown occurs. |
| 2 | Anode | Connected to ground or lower-potential reference; completes current path during regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Taped packaging (3,000 pcs/reel) | Enables high-speed pick-and-place assembly without manual handling or orientation errors. |
| SRP-F flat-lead package | Reduces PCB footprint by >40% vs. traditional SOD-123, supporting miniaturized power modules and wearables. |
| Low Zener voltage tempco (~0 mV/°C) | Minimizes output drift over –40°C to +85°C operating range - critical for stable reference in unregulated supplies. |
| High ESD immunity (±30 kV HBM) | Eliminates need for external protection in board-level ESD-prone environments like USB-powered peripherals. |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
|
Use Scenario: Used in TL431-based adjustable linear regulators or flyback SMPS feedback loops to set precise output voltage. IC Role / Device Role / Timing Role: Provides stable, low-drift voltage reference point for optocoupler-driven error amplification. Use Value: Enables ±1% output accuracy over temperature due to tight 4.01–4.48 V tolerance and near-zero tempco. |
Use Scenario: Placed across microcontroller I/O pins or sensor supply rails to suppress transient spikes above 4.5 V. IC Role / Device Role / Timing Role: Acts as passive crowbar element that conducts excess energy to ground during ESD or surge events. Use Value: Limits clamping voltage to ≤4.48 V while sustaining ±30 kV HBM - protecting 3.3 V logic without series resistance. |
| Low-Power Bias Network | Temperature-Stable Reference Source |
|
Use Scenario: Supplies bias current to op-amp input stages or transistor base networks in battery-operated instrumentation. IC Role / Device Role / Timing Role: Delivers fixed 4.3 V reference with <10 μA leakage at 1 V reverse bias. Use Value: Reduces quiescent current by >50% compared to resistor-divider references, extending coin-cell life. |
Use Scenario: Serves as primary reference for ADC voltage scaling or DAC output calibration in industrial data loggers. IC Role / Device Role / Timing Role: Functions as a two-terminal shunt reference with minimal thermal hysteresis. Use Value: Maintains <±0.5% voltage shift from –25°C to +75°C - meeting Class A sensor accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C4V3 (Nexperia) | Same 4.3 V nominal Zener, but SOT-23 package (larger footprint); rd = 90 Ω typical (lower), Pd = 300 mW (lower). | Suitable for general-purpose clamping where space allows larger package and lower power suffices. | Select BZX84-C4V3 only if board area permits SOT-23 and thermal budget is constrained to ≤300 mW. |
| MMSZ4V3T1G (ON Semiconductor) | Same SRP-F-equivalent SOD-123 package; tighter 4.1–4.5 V tolerance (±4.7%), rd = 100 Ω typical, Pd = 500 mW. | Better for cost-sensitive consumer designs needing slightly tighter tolerance but less thermal headroom. | Choose MMSZ4V3T1G when Zener voltage consistency is prioritized over power handling and ESD robustness. |
Compared with BZX84-C4V3 and MMSZ4V3T1G, the RKZ4.3BKV#P1 offers superior thermal margin (700 mW), industry-leading ESD rating (±30 kV), and flat-lead SRP-F geometry ideal for ultra-dense layouts - making it optimal for automotive body control modules and medical sensor front-ends requiring reliability and miniaturization.
Availability
RKZ4.3BKV#P1 is available at Aetrix Electronics and suitable for industrial power supplies, portable medical sensors, and automotive interior lighting systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for RKZ4.3BKV#P1 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 specializing in microcontrollers, analog, and power devices for industrial, automotive, and IoT applications.
The RKZ-KV Series was developed specifically for high-reliability, surface-mount voltage regulation in space-constrained power management circuits - emphasizing tight tolerance, thermal stability, and robust ESD performance.
FAQ
What is the Zener voltage tolerance of RKZ4.3BKV#P1?
The RKZ4.3BKV#P1 has a specified Zener voltage range of 4.01 V to 4.48 V at 10 mA test current, representing a ±5.2% tolerance around the nominal 4.3 V rating. This tolerance is verified per the REJ03G1700-0100 datasheet, Table "Electrical Characteristics", and applies under standard test conditions (Ta = 25°C, pulse width = 40 ms). The RKZ4.3BKV#P1 maintains this specification across its qualified operating temperature range.
Does RKZ4.3BKV#P1 support automated SMT assembly?
Yes, the RKZ4.3BKV#P1 is supplied in tape-and-reel format (3,000 pcs/reel, PWSF0002ZB-A carrier tape) and features the SRP-F flat-lead package with standardized gull-wing terminations compatible with standard reflow profiles. Its laser-marked cathode indicator ('4·3' + date code) ensures consistent orientation during vision-guided placement. The RKZ4.3BKV#P1 meets IPC-JEDEC J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to assembly.
What is the maximum reverse leakage current for RKZ4.3BKV#P1?
The RKZ4.3BKV#P1 specifies a maximum reverse current (IR) of 10 μA at VR = 1 V and Ta = 25°C, as stated in the "Electrical Characteristics" table. This low leakage enables use in high-impedance bias networks where standby current must remain below 20 μA - such as in battery-backed real-time clocks or low-power sensor signal conditioning. The RKZ4.3BKV#P1 maintains sub-50 μA leakage up to 80% of VZ under typical operating conditions.
Can RKZ4.3BKV#P1 replace older through-hole Zener diodes?
The RKZ4.3BKV#P1 is not a direct drop-in replacement for through-hole Zeners (e.g., 1N4733A) due to its SRP-F surface-mount footprint and thermal dissipation profile. While electrically equivalent in Zener voltage and regulation function, board redesign is required to accommodate the 2.5 mm × 1.2 mm land pattern and reflow soldering process. The RKZ4.3BKV#P1 delivers identical regulation performance in modern SMT designs where space and assembly efficiency are prioritized over legacy through-hole compatibility.
Is RKZ4.3BKV#P1 compliant with automotive AEC-Q200 standards?
No, the RKZ4.3BKV#P1 is not AEC-Q200 qualified. Per Renesas documentation, the RKZ-KV Series is classified as "Standard" grade and intended for industrial, consumer, and office equipment - not automotive or safety-critical applications. For AEC-Q200-compliant alternatives, consider Renesas' KZ series or ON Semiconductor's 1SMA5914BT3G. The RKZ4.3BKV#P1 remains suitable for non-automotive applications including industrial PLCs, HVAC controls, and consumer power adapters.
RKZ4.3BKV#P1 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:
- -
RKZ4.3BKV#P1 FAQ
1.How can I place an order for RKZ4.3BKV#P1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ4.3BKV#P1 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 RKZ4.3BKV#P1 reliable?
The price and inventory of RKZ4.3BKV#P1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ4.3BKV#P1 is usually 5 days.
3.What payment methods are accepted for RKZ4.3BKV#P1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ4.3BKV#P1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ4.3BKV#P1?
RKZ4.3BKV#P1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ4.3BKV#P1 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 RKZ4.3BKV#P1?
For technical support, including RKZ4.3BKV#P1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ4.3BKV#P1 requirements.
6.How does Aetrix verify that RKZ4.3BKV#P1 is sourced from the original manufacturer or authorized distributors?
All RKZ4.3BKV#P1 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 RKZ4.3BKV#P1 meets industry standards.
7.What is the process for return or replacement of RKZ4.3BKV#P1?
All RKZ4.3BKV#P1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ4.3BKV#P1, 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 RKZ4.3BKV#P1 part is unused and in its original packaging.
Return procedure for RKZ4.3BKV#P1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ4.3BKV#P1 Tags
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MM5Z5V1ST1G
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