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Renesas RKZ3.9BKU#P6
- Part No.:
- RKZ3.9BKU#P6
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ3.9BKU#P6.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
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Inventory:240,000
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Product details
Overview
RKZ3.9BKU#P6 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and reference circuits. It delivers a nominal Zener voltage of 3.9 V (min 3.70 V, max 4.10 V at 10 mA), with dynamic resistance of 130 Ω, power dissipation up to 700 mW, and ESD capability of ±30 kV (HBM). It is used in voltage reference stages of sensor signal conditioning and microcontroller power-supply monitoring.
For engineers reviewing the RKZ3.9BKU#P6 datasheet, RKZ3.9BKU#P6 pinout, RKZ3.9BKU#P6 application, or RKZ3.9BKU#P6 equivalent, key selection criteria include its tight 3.7–4.1 V Zener tolerance at 10 mA, SRP-F surface-mount package compatibility with high-density PCB layouts, thermal derating behavior up to 150°C junction temperature, and robust ±30 kV HBM ESD rating for industrial environments.
Technical Context
This device operates as a two-terminal voltage-reference element relying on controlled reverse-biased Zener breakdown. Its electrical behavior is defined under pulsed test conditions (Pw = 40 ms) to minimize self-heating, ensuring stable VZ measurement at IZ = 10 mA. The SRP-F flat-lead package enables direct thermal coupling to PCB copper, supporting reliable operation within the specified –55°C to +150°C storage range and 150°C maximum junction temperature.
The RKZ3.9BKU#P6 exhibits a negative temperature coefficient typical of low-voltage Zeners (<5 V), confirmed by characteristic curves in the datasheet. Its 130 Ω dynamic resistance directly impacts output impedance in shunt-regulator configurations, while its 700 mW power rating assumes mounting on a 50 × 50 mm glass-epoxy board with 10 × 10 mm solder land - a defined thermal boundary condition critical for layout-dependent derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70–4.10 V at IZ = 10 mA - defines regulated output voltage window in shunt reference applications |
| Dynamic Resistance (rd) | 130 Ω at IZ = 10 mA - determines load regulation error and ripple rejection in voltage reference circuits |
| Power Dissipation (Pd) | 700 mW at Ta = 25°C on standard test board - sets maximum continuous power before thermal shutdown or degradation |
| Junction Temperature (Tj) | 150°C maximum - constrains operating ambient and PCB copper area requirements for thermal management |
| ESD Capability | ±30 kV per HBM (C = 150 pF, R = 330 Ω) - ensures robustness against handling and board-level electrostatic discharge events |
| Reverse Current (IR) | ≤10 µA at VR = 1 V - guarantees low leakage in standby or high-impedance bias networks |
| Package | SRP-F (Flat lead, small resin) - 2.5 × 1.5 × 0.9 mm outline optimized for automated SMT placement and space-constrained designs |
Pinout & Package
SRP-F is a 2-pin surface-mount flat-lead package with cathode-marked top-side marking. The device has no internal die bonding wires; terminals are formed by molded leads extending from opposite sides of the resin body. Thermal path relies on solder joint conduction to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 | Anode | Connected to circuit ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Taped delivery (3,000 pcs/reel) | Enables high-speed pick-and-place assembly without manual handling or orientation errors |
| SRP-F flat-lead package | Reduces board footprint to 3.75 mm² and supports <0.5 mm pitch placement for ultra-compact designs |
| ±30 kV HBM ESD rating | Eliminates need for external ESD protection in cost-sensitive industrial control and sensor modules |
| 10 µA max reverse leakage at 1 V | Minimizes quiescent current draw in battery-powered voltage monitor circuits |
| 150°C max junction temperature | Permits operation in enclosed enclosures or near heat-generating components without forced cooling |
Applications
| Industrial Sensor Reference | Microcontroller Power Monitor |
|---|---|
Use Scenario: Providing stable 3.9 V reference for analog-to-digital conversion in pressure or temperature transmitters. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise scaling factor for ADC input range. Use Value: Tight 3.7–4.1 V tolerance and 130 Ω dynamic resistance ensure <±0.5% full-scale error across temperature and supply variations. | Use Scenario: Monitoring 5 V or 3.3 V supply rails in embedded controllers to trigger brown-out reset or warning flags. IC Role / Device Role / Timing Role: Threshold detector via resistor divider into MCU GPIO or comparator input. Use Value: Low 10 µA leakage preserves accuracy of resistive divider ratio; ±30 kV ESD rating prevents false triggers from board-level transients. |
| Low-Power Analog Biasing | LED Current Regulation |
Use Scenario: Generating stable bias voltages for op-amp input stages or transistor amplifiers in portable instrumentation. IC Role / Device Role / Timing Role: Passive voltage source supplying fixed DC offset or reference point. Use Value: 700 mW power rating allows use with series resistors down to ~100 Ω for 30 mA bias currents without thermal overload. | Use Scenario: Setting constant current through indicator or status LEDs in industrial HMIs and control panels. IC Role / Device Role / Timing Role: Voltage clamp defining forward drop across current-setting resistor. Use Value: Stable 3.9 V Zener voltage ensures consistent LED brightness across input voltage fluctuations from 4.5–12 V supplies. |
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 |
|---|---|---|---|
| MMSZ4V3T1G | Zener voltage 4.3 V (min 4.01 V, max 4.59 V); SOD-123 package; 500 mW Pd | Higher nominal voltage and lower power rating limit use in 3.9 V–specific references | Select when 4.3 V regulation is acceptable and board space permits larger SOD-123 footprint |
| BZX84-C3V9 | Zener voltage 3.9 V (min 3.7 V, max 4.1 V); SOT-23 package; 300 mW Pd; 90 Ω rd | Lower power rating requires tighter current limiting; smaller SOT-23 footprint but higher thermal resistance | Choose for ultra-low-power designs where 300 mW suffices and SOT-23 placement is preferred |
Compared with MMSZ4V3T1G and BZX84-C3V9, the RKZ3.9BKU#P6 offers superior thermal performance (700 mW vs ≤500 mW), identical VZ tolerance, and enhanced ESD robustness (±30 kV vs typical ±8 kV), making it optimal for industrial environments requiring long-term stability under thermal stress.
Availability
RKZ3.9BKU#P6 is available at Aetrix Electronics and suitable for industrial sensor reference, microcontroller power monitoring, and low-power analog biasing requiring stable component supply, traceable sourcing, and lifecycle continuity.
Supply support for RKZ3.9BKU#P6 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 manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.
The RKZ-KV Series was developed specifically for compact, high-reliability voltage regulation in space-constrained industrial and sensing applications, emphasizing tight Zener tolerance, high ESD immunity, and thermally efficient surface-mount packaging.
FAQ
What is the Zener voltage tolerance of RKZ3.9BKU#P6 at 10 mA test current?
The RKZ3.9BKU#P6 has a guaranteed Zener voltage range of 3.70 V to 4.10 V when tested at IZ = 10 mA, resulting in a ±5.1% tolerance about the nominal 3.9 V value. This specification is verified under pulsed conditions (Pw = 40 ms) to avoid self-heating effects, and applies strictly to the RKZ3.9BKU#P6 variant as documented in Renesas preliminary datasheet REJ03G1700-0100.
Does RKZ3.9BKU#P6 support high-density PCB layouts?
Yes, RKZ3.9BKU#P6 uses the SRP-F package - a flat-lead, small-resin surface-mount outline measuring 2.5 × 1.5 × 0.9 mm - explicitly designed for compact and high-density layouts. Its lead configuration allows 0.5 mm minimum pitch placement, and the taped 3,000 pcs/reel format supports automated SMT assembly without reorientation, making RKZ3.9BKU#P6 ideal for miniaturized industrial control modules.
What is the maximum allowable junction temperature for RKZ3.9BKU#P6?
The maximum junction temperature (Tj) for RKZ3.9BKU#P6 is 150°C, as specified in the Absolute Maximum Ratings table of the Renesas datasheet. This rating assumes proper PCB thermal design - specifically mounting on a 50 × 50 mm glass-epoxy board with 10 × 10 mm solder land - and must be respected to prevent parametric drift or permanent degradation of the RKZ3.9BKU#P6's Zener characteristics.
How does the ESD rating of RKZ3.9BKU#P6 compare to standard Zener diodes?
RKZ3.9BKU#P6 achieves ±30 kV Human Body Model (HBM) ESD immunity (C = 150 pF, R = 330 Ω), significantly exceeding typical Zener diodes rated at ±2–8 kV. This high rating is confirmed per IR spec failure criteria and applies in both forward and reverse directions with 10-pulse testing. Engineers can rely on RKZ3.9BKU#P6 to withstand common handling and system-level transients without external protection, unlike most alternatives that require supplemental TVS devices.
Can RKZ3.9BKU#P6 be used in battery-powered applications?
Yes, RKZ3.9BKU#P6 is well-suited for battery-powered applications due to its ≤10 µA reverse leakage current at VR = 1 V and stable regulation at low test currents. When biased at 1–5 mA - well below its 10 mA nominal test point - the RKZ3.9BKU#P6 maintains usable regulation with minimal quiescent draw, enabling long operational life in portable sensors or wireless nodes where RKZ3.9BKU#P6 serves as a precision reference or supervisor threshold element.
RKZ3.9BKU#P6 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:
- -
RKZ3.9BKU#P6 FAQ
1.How can I place an order for RKZ3.9BKU#P6 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ3.9BKU#P6 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 RKZ3.9BKU#P6 reliable?
The price and inventory of RKZ3.9BKU#P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ3.9BKU#P6 is usually 5 days.
3.What payment methods are accepted for RKZ3.9BKU#P6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ3.9BKU#P6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ3.9BKU#P6?
RKZ3.9BKU#P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ3.9BKU#P6 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 RKZ3.9BKU#P6?
For technical support, including RKZ3.9BKU#P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ3.9BKU#P6 requirements.
6.How does Aetrix verify that RKZ3.9BKU#P6 is sourced from the original manufacturer or authorized distributors?
All RKZ3.9BKU#P6 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 RKZ3.9BKU#P6 meets industry standards.
7.What is the process for return or replacement of RKZ3.9BKU#P6?
All RKZ3.9BKU#P6 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ3.9BKU#P6, 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 RKZ3.9BKU#P6 part is unused and in its original packaging.
Return procedure for RKZ3.9BKU#P6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ3.9BKU#P6 Tags
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