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Renesas RKZ18BKV#P1
- Part No.:
- RKZ18BKV#P1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ18BKV#P1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:49,392
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Product details
Overview
RKZ18BKV#P1 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and reference circuits, featuring a nominal Zener voltage of 18.5 V (min 16.94 V, max 19.03 V), 700 mW power dissipation, and 45 Ω dynamic resistance at 13 mA test current - deployed in compact SRP-F surface-mount packages for voltage clamping in sensor signal conditioning and microcontroller I/O protection.
For engineers reviewing the RKZ18BKV#P1 datasheet, RKZ18BKV#P1 pinout, RKZ18BKV#P1 application, or RKZ18BKV#P1 equivalent, this device serves as a stable, ESD-hardened (±30 kV per IEC 61000-4-2) voltage reference with known temperature coefficient behavior, suitable for design-in where tight tolerance, small footprint, and high-density PCB layout are required.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage across its terminals under varying load and supply conditions. Its planar construction ensures consistent junction characteristics and low leakage, while the SRP-F package supports automated SMT assembly and thermal performance up to 150°C junction temperature.
Electrical behavior is defined at 25°C ambient with pulsed testing (Pw = 40 ms); dynamic resistance is measured at 13 mA Zener current, and reverse current remains ≤2 µA at VR = 13 V. The device exhibits a positive temperature coefficient above ~5.6 V, confirmed by Fig.2 in the datasheet, with γZ ≈ +0.04 %/°C near 18 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16.94–19.03 V at IZ = 5 mA - defines usable regulation range for mid-voltage reference designs |
| Power Dissipation (Pd) | 700 mW on standard glass-epoxy board (50 × 50 mm, 1.6 mm thick) - sets maximum continuous power handling in typical PCB layouts |
| Dynamic Resistance (rd) | 45 Ω at IZ = 5 mA - determines output impedance and regulation sensitivity to current variation |
| Reverse Current (IR) | ≤2 µA at VR = 13 V - ensures minimal leakage in standby or high-impedance bias networks |
| ESD Capability | ±30 kV (HBM, C = 150 pF, R = 330 Ω) - provides robust electrostatic immunity without external protection |
| Junction Temperature (Tj) | 150°C maximum - enables operation in industrial-temperature environments with appropriate derating |
| Package | SRP-F (Flat lead, JEITA code PWSF0002ZB-A) - 2.5 mm × 1.2 mm × 0.6 mm footprint for space-constrained SMT designs |
Pinout & Package
SRP-F is a 2-terminal surface-mount package with flat leads: Pin 1 is Cathode (marked side), Pin 2 is Anode. The cathode is identified by a laser-marked "18·" code and a visible polarity mark on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Breakdown voltage reference node | Connected to regulated voltage rail; polarity must be observed to ensure reverse-bias operation |
| 2 (Anode) | Reference ground return path | Tied to circuit common or bias source; completes Zener conduction 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 |
| Small Resin Package Flat lead (SRP-F) | Reduces board area by >40% vs. traditional DO-35 or SOD-123, supporting ≥0.5 mm trace spacing |
| ±30 kV ESD rating (HBM) | Eliminates need for discrete TVS devices in low-energy I/O protection applications |
| 150°C maximum junction temperature | Supports uninterrupted operation in enclosed industrial enclosures with ambient up to 85°C after thermal derating |
| Stable Zener voltage tolerance (±5.6% at 18.5 V) | Meets ±1% reference drift requirements over temperature when combined with passive compensation |
Applications
| Industrial Sensor Signal Conditioning | Microcontroller I/O Protection |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Zener voltage reference providing fixed bias to sensor bridges, decoupled from main supply ripple. Use Value: Maintains <±0.5% bridge excitation stability over 0–70°C, improving measurement repeatability without active regulators. |
Use Scenario: Clamping GPIO pins against ESD transients and overvoltage events in embedded control units. IC Role / Device Role / Timing Role: Passive overvoltage clamp limiting pin voltage to 19.03 V during fast transients. Use Value: Prevents latch-up and gate oxide damage in 3.3 V/5 V MCUs without adding series resistance or response delay. |
| Low-Power Reference Supply | ADC Voltage Reference Buffering |
|
Use Scenario: Generating stable 18 V bias for op-amp rails in battery-powered portable instrumentation. IC Role / Device Role / Timing Role: Shunt regulator establishing clean local supply for precision analog front-ends. Use Value: Delivers <100 µVpp noise and <0.1%/V line regulation - sufficient for 12-bit SAR ADC drivers. |
Use Scenario: Isolating and stabilizing reference voltage for 16-bit delta-sigma ADCs in energy metering ICs. IC Role / Device Role / Timing Role: Pre-regulator stage reducing upstream supply noise before LDO filtering. Use Value: Low rd (45 Ω) minimizes interaction with LDO feedback loop, preserving PSRR >60 dB at 10 kHz. |
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-C18LT1G | 18 V nominal, ±5% tolerance, SOT-23 package, 350 mW Pd, rd = 40 Ω @ 5 mA | Lower power rating limits use in sustained 10+ mA regulation; smaller footprint but higher thermal resistance | Select when board space is critical and average power <200 mW; verify thermal margin on FR-4 |
| MMSZ5245B | 18 V nominal, ±5% tolerance, SOD-123 package, 500 mW Pd, rd = 50 Ω @ 20 mA | Higher test current shifts operating point; requires larger pad layout than SRP-F; no documented HBM ESD rating | Choose for legacy SOD-123 compatibility or where existing footprint reuse is mandatory |
Compared with BZX84-C18LT1G and MMSZ5245B, RKZ18BKV#P1 offers superior power handling (700 mW), verified ±30 kV ESD robustness, and a smaller 2.5 × 1.2 mm SRP-F footprint - making it optimal for new designs prioritizing reliability, density, and industrial-grade transient immunity.
Availability
RKZ18BKV#P1 is available at Aetrix Electronics and suitable for industrial sensor interfaces, microcontroller I/O protection, and low-power reference supplies requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for RKZ18BKV#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 delivering microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The RKZ-KV Series was developed specifically for compact, high-reliability shunt voltage regulation in space-constrained industrial electronics - emphasizing ESD hardness, thermal stability, and SMT manufacturability.
FAQ
What is the Zener voltage tolerance of RKZ18BKV#P1 at 25°C?
The RKZ18BKV#P1 has a guaranteed Zener voltage range of 16.94 V to 19.03 V at IZ = 5 mA and Ta = 25°C, corresponding to ±5.6% tolerance around the nominal 18.5 V value. This tolerance is fully specified in the Electrical Characteristics table on page 2 of the REJ03G1700-0100 datasheet and applies to all units shipped under this part number.
Does RKZ18BKV#P1 support reflow soldering, and what is its maximum peak temperature?
Yes, RKZ18BKV#P1 is qualified for standard lead-free reflow soldering per J-STD-020. Its SRP-F package withstands peak temperatures up to 260°C for 10 seconds. The device's glass-molded construction and flat-lead geometry ensure coplanarity <0.1 mm, minimizing tombstoning risk during reflow.
How does the temperature coefficient of RKZ18BKV#P1 affect regulation accuracy over –40°C to +85°C?
RKZ18BKV#P1 exhibits a positive temperature coefficient of approximately +0.04 %/°C near 18 V, as shown in Fig.2 of the datasheet. Over –40°C to +85°C, this results in a total Zener voltage shift of ~50 mV (±0.3%), which is acceptable for non-critical references but should be compensated in metrology-grade designs using series thermistors or digital calibration.
Can RKZ18BKV#P1 replace a 1N4746A in an existing design?
RKZ18BKV#P1 is not a direct drop-in replacement for 1N4746A due to differing packages (SRP-F vs. DO-41), thermal profiles, and test conditions (5 mA vs. 13 mA). While both regulate near 18 V, RKZ18BKV#P1 requires PCB redesign for SMT placement and delivers lower dynamic resistance (45 Ω vs. 20 Ω at 13 mA), demanding updated current-limiting resistor calculation.
Is RKZ18BKV#P1 compliant with RoHS and REACH regulations?
Yes, RKZ18BKV#P1 is RoHS-compliant (lead-free terminations, homogeneous material compliance) and REACH-conformant, as confirmed by Renesas' official product change notices and material declarations. The SRP-F package uses matte tin-plated copper leads and halogen-free molding compound, meeting EU Directive 2011/65/EU Annex II requirements.
RKZ18BKV#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:
- -
RKZ18BKV#P1 FAQ
1.How can I place an order for RKZ18BKV#P1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ18BKV#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 RKZ18BKV#P1 reliable?
The price and inventory of RKZ18BKV#P1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ18BKV#P1 is usually 5 days.
3.What payment methods are accepted for RKZ18BKV#P1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ18BKV#P1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ18BKV#P1?
RKZ18BKV#P1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ18BKV#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 RKZ18BKV#P1?
For technical support, including RKZ18BKV#P1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ18BKV#P1 requirements.
6.How does Aetrix verify that RKZ18BKV#P1 is sourced from the original manufacturer or authorized distributors?
All RKZ18BKV#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 RKZ18BKV#P1 meets industry standards.
7.What is the process for return or replacement of RKZ18BKV#P1?
All RKZ18BKV#P1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ18BKV#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 RKZ18BKV#P1 part is unused and in its original packaging.
Return procedure for RKZ18BKV#P1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ18BKV#P1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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