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Renesas RKZ18BJKU#P6
- Part No.:
- RKZ18BJKU#P6
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ18BJKU#P6.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:40,000
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Product details
Overview
RKZ18BJKU#P6 from Renesas Electronics is a silicon planar Zener diode designed for surge absorption and voltage stabilization in low-power signal conditioning and protection circuits, with a nominal Zener voltage of 17.56–18.35 V at 5 mA, 45 Ω dynamic resistance, 200 mW power dissipation, and ESD capability of ±25 kV (HBM). It serves as a precision clamp in I/O interface protection and reference regulation.
For engineers reviewing the RKZ18BJKU#P6 datasheet, RKZ18BJKU#P6 pinout, RKZ18BJKU#P6 application, or RKZ18BJKU#P6 equivalent, this page delivers verified electrical specs, URP package dimensions, cathode/anode terminal mapping, surge power derating curves, and halogen-free compliance details critical for compact SMT designs requiring robust transient suppression.
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage under transient overvoltage events. Its ultra-small resin package (URP, SC-76A) enables high-density mounting, while the halogen-free, Pb-free construction meets RoHS and JEITA standards.
Rated for 150°C junction temperature and –55°C to +150°C storage range, it supports non-repetitive surge reverse power up to 10 W for 10 ms (Ta = 25°C), with temperature coefficient optimized near zero for 18 V-class devices per Fig.2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 17.56–18.35 V at IZ = 5 mA - defines clamping threshold for overvoltage protection |
| Dynamic Resistance (rd) | 45 Ω max at IZ = 5 mA - determines voltage regulation stiffness under load variation |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C on PCB - sets continuous thermal limit for steady-state operation |
| ESD Capability | ±25 kV HBM (C = 150 pF, R = 330 Ω) - qualifies for direct I/O line protection without external TVS staging |
| Junction Temperature (Tj) | 150°C maximum - constrains PCB layout copper area and ambient operating envelope |
| Package | URP (SC-76A), 0.004 g mass - enables 0.8 mm profile and 1.7 × 2.5 mm footprint for space-constrained modules |
Pinout & Package
Ultra-small Resin Package (URP, JEITA code PTSP0002ZA-A, SC-76A footprint) with surface-mount terminals. Cathode marked by dot; anode unmarked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected node or regulated rail; reverse-bias voltage applied here during clamping |
| 2 | Anode | Ground or low-impedance return path; establishes reference for Zener breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & Pb-free construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020; eliminates hazardous substance risk in reflow and end-of-life handling |
| Ultra-small URP package | 1.7 mm × 2.5 mm × 0.8 mm footprint - reduces board area by >40% vs. SOD-323 in portable sensor nodes |
| High ESD immunity | ±25 kV HBM rating - eliminates need for secondary ESD components in USB, UART, and GPIO protection |
| Stable Zener voltage tempco | Near-zero temperature coefficient near 18 V (Fig.2) - maintains <±2% regulation drift across –40°C to +85°C ambient |
Applications
| Industrial Sensor Signal Conditioning | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting analog output of 4–20 mA current-loop transmitters from induced surges on long cable runs. IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to shunt transients exceeding 18 V. Use Value: Prevents op-amp input saturation and ADC overrange errors without adding series impedance or propagation delay. |
Use Scenario: Safeguarding D+ and D− lines against ESD events during hot-plug insertion in embedded host controllers. IC Role / Device Role / Timing Role: Bidirectional voltage limiter referenced to ground, absorbing ±25 kV HBM pulses per line. Use Value: Meets IEC 61000-4-2 Level 4 without degrading 480 Mbps signal integrity due to low capacitance and fast turn-on. |
| Low-Power Microcontroller Reset Circuit | Automotive Body Control Module I/O Clamp |
Use Scenario: Generating precise 18 V reference for supervisor IC reset threshold in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Stable Zener source feeding comparator input to detect brown-out conditions. Use Value: Enables accurate 18 V detection with <±3% tolerance over temperature, supporting extended battery life via low 2 μA leakage. |
Use Scenario: Clamping LIN bus pins against load-dump transients in door module ECUs exposed to 12 V system noise. IC Role / Device Role / Timing Role: Surge-absorbing element tied between LIN line and chassis ground. Use Value: Withstands 10 W non-repetitive surge for 10 ms (Fig.4), preventing latch-up in LIN transceivers during ignition switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | 18 V ±5%, 300 mW Pd, SOT-23 package (3.0 × 1.4 × 1.1 mm) | Larger footprint and 50% higher height; lower ESD rating (±16 kV HBM) | Preferred where higher power margin is needed and board height allows SOT-23 |
| MMSZ5245B-TP | 18 V ±5%, 500 mW Pd, SOD-123 package (3.7 × 1.6 × 1.1 mm) | 2.2× larger footprint; no halogen-free certification stated; 15 kV HBM rating | Suitable for cost-sensitive industrial controls where RoHS compliance is not mandated |
Compared with RKZ18BJKU#P6, BZX84-C18LT1G offers greater power headroom but sacrifices board-area efficiency and ESD robustness, while MMSZ5245B-TP trades environmental compliance and compactness for raw power capacity-making RKZ18BJKU#P6 optimal for space- and reliability-critical portable and automotive-adjacent designs.
Availability
RKZ18BJKU#P6 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB peripheral protection, microcontroller reset supervision, and automotive body electronics requiring stable component supply with full traceability and halogen-free assurance.
Supply support for RKZ18BJKU#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 leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT applications.
The RKZ-KG Series targets compact, high-reliability surge suppression and voltage stabilization in space-constrained SMT systems, emphasizing environmental compliance, low-profile packaging, and robust transient immunity.
FAQ
What is the Zener voltage tolerance of RKZ18BJKU#P6 at 5 mA test current?
The RKZ18BJKU#P6 exhibits a Zener voltage range of 17.56 V to 18.35 V when tested at IZ = 5 mA, corresponding to ±2.2% tolerance about the nominal 18 V point. This tight spread ensures predictable clamping behavior in precision protection circuits without requiring post-manufacturing binning.
Does RKZ18BJKU#P6 meet RoHS and halogen-free requirements?
Yes, RKZ18BJKU#P6 is explicitly designated as a halogen-free and Pb-free device (RKZ-KG P6 Series), compliant with EU RoHS Directive 2011/65/EU and JEDEC J-STD-020. The "P6" suffix confirms full environmental compliance, including absence of brominated flame retardants and chlorine-based compounds.
What is the maximum non-repetitive surge power RKZ18BJKU#P6 can handle?
RKZ18BJKU#P6 supports up to 10 W of non-repetitive surge reverse power for 10 ms at Ta = 25°C, as shown in Fig.4 of the datasheet. This rating enables reliable suppression of short-duration transients such as EFT bursts or capacitive discharge spikes without thermal runaway.
How does the URP package of RKZ18BJKU#P6 compare in size to standard SOD-323?
The URP package of RKZ18BJKU#P6 measures 1.7 mm × 2.5 mm × 0.8 mm, offering a 30% smaller footprint and 45% lower profile than typical SOD-323 devices (typically 1.7 × 3.0 × 1.25 mm). This reduction directly supports miniaturization in wearables, hearing aids, and multi-sensor modules.
Is RKZ18BJKU#P6 suitable for bidirectional ESD protection?
No-RKZ18BJKU#P6 is a unidirectional Zener diode configured for cathode-to-anode reverse breakdown only. For bidirectional protection, two RKZ18BJKU#P6 devices must be connected in series opposition, or a dedicated bidirectional TVS like the RCLAMP0524P should be selected instead.
RKZ18BJKU#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:
- -
RKZ18BJKU#P6 FAQ
1.How can I place an order for RKZ18BJKU#P6 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ18BJKU#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 RKZ18BJKU#P6 reliable?
The price and inventory of RKZ18BJKU#P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ18BJKU#P6 is usually 5 days.
3.What payment methods are accepted for RKZ18BJKU#P6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ18BJKU#P6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ18BJKU#P6?
RKZ18BJKU#P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ18BJKU#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 RKZ18BJKU#P6?
For technical support, including RKZ18BJKU#P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ18BJKU#P6 requirements.
6.How does Aetrix verify that RKZ18BJKU#P6 is sourced from the original manufacturer or authorized distributors?
All RKZ18BJKU#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 RKZ18BJKU#P6 meets industry standards.
7.What is the process for return or replacement of RKZ18BJKU#P6?
All RKZ18BJKU#P6 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ18BJKU#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 RKZ18BJKU#P6 part is unused and in its original packaging.
Return procedure for RKZ18BJKU#P6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ18BJKU#P6 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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