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Renesas RKZ6.8TJKJ#R1
- Part No.:
- RKZ6.8TJKJ#R1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ6.8TJKJ#R1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:384,000
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Product details
Overview
RKZ6.8TJKJ#R1 from Renesas Electronics is a silicon planar Zener diode designed for surge absorption and voltage stabilization in low-power signal-line protection circuits. It delivers a nominal Zener voltage of 6.8 V (6.65–6.93 V), 2 µA maximum reverse leakage at 3.5 V, 30 Ω typical dynamic resistance at 5 mA, and 150 mW power dissipation on PCB - deployed in USB port ESD clamping and I²C bus voltage rail conditioning.
For engineers reviewing the RKZ6.8TJKJ#R1 datasheet, RKZ6.8TJKJ#R1 pinout, RKZ6.8TJKJ#R1 application, or RKZ6.8TJKJ#R1 equivalent, this page provides verified package mapping (UFP/SC-79), terminal roles, ESD capability (±30 kV per IEC 61000-4-2), thermal derating curve, and direct alternative options with documented parameter divergence.
Technical Context
This device operates as a two-terminal, unidirectional voltage reference and transient suppressor. Its planar junction construction ensures stable breakdown characteristics under repetitive surge stress, with a junction temperature limit of 150°C and storage range from −55°C to +150°C.
The RKZ6.8TJKJ#R1 exhibits a negative temperature coefficient near zero crossing (~0.02%/°C at 6.8 V), enabling predictable voltage drift in ambient-temperature-varying interfaces. Its ultra-small flat lead (UFP) package supports high-density SMT placement while maintaining 30 kV HBM ESD robustness in both forward and reverse directions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.65–6.93 V at 5 mA - defines clamping threshold for overvoltage events on 5 V logic rails. |
| Reverse Leakage (IR) | ≤2 µA at 3.5 V - ensures minimal standby current draw in always-on sensor interfaces. |
| Dynamic Resistance (rd) | 30 Ω max at 5 mA - determines voltage deviation under transient current surges up to 100 mA. |
| Power Dissipation (Pd) | 150 mW at Ta = 25°C - sets continuous power handling on standard FR-4 PCB; derates linearly above 25°C. |
| ESD Capability | ±30 kV per IEC 61000-4-2 (C = 150 pF, R = 330 Ω) - qualifies for Level 4 system-level ESD immunity without external TVS. |
| Junction Temperature (Tj) | 150°C max - constrains thermal design margin when used adjacent to heat-generating ICs. |
Pinout & Package
Package: Ultra Small Flat Lead (UFP), JEITA code PWSF0002ZA-A, industry-standard SC-79 footprint (1.70 × 0.80 × 0.60 mm), mass 0.0016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to protected line (e.g., USB D+); conducts during overvoltage to clamp voltage to VZ. |
| 2 | Anode | Connected to ground or lower-potential rail; completes conduction path during reverse-bias surge events. |
Key Features
| Feature | Design Value |
|---|---|
| Emboss taping reel packaging | Enables automated pick-and-place assembly at >10,000 units/hour without manual handling or static risk. |
| Ultra-small UFP footprint | Reduces board area by 65% vs. SOD-323; fits within 0.8 mm pitch routing on space-constrained IoT sensor modules. |
| Stable Zener voltage tolerance | ±2.2% total variation (6.65–6.93 V) ensures reliable clamping across production lots and temperature ranges. |
| High ESD robustness | 30 kV contact discharge rating eliminates need for secondary ESD components in consumer-grade USB and audio ports. |
Applications
| USB 2.0 Data Line Protection | I²C Bus Voltage Stabilization |
|---|---|
Use Scenario: Clamps ESD transients on D+ and D− lines during hot-plug insertion of USB peripherals. IC Role / Device Role / Timing Role: Two-diode back-to-back configuration (one RKZ6.8TJKJ#R1 per line) acts as bidirectional voltage limiter referenced to GND. Use Value: Maintains signal integrity below 0.3 V overshoot during ±8 kV contact discharge, preserving USB eye diagram compliance. |
Use Scenario: Stabilizes 3.3 V pull-up rail on I²C SDA/SCL lines exposed to noisy MCU GPIO switching noise. IC Role / Device Role / Timing Role: Shunt regulator placed between SDA and GND to absorb coupling spikes without loading bus capacitance. Use Value: Limits rail excursion to ≤6.93 V during 100 ns transients, preventing false ACK/NACK due to logic-level corruption. |
| Low-Power Sensor Interface Clamp | Industrial Control Signal Conditioning |
Use Scenario: Protects analog output of temperature/humidity sensors (e.g., Sensirion SHT45) against field-induced surges. IC Role / Device Role / Timing Role: Single-ended clamp from sensor VOUT to GND, sized to avoid affecting 12-bit ADC resolution. Use Value: Adds <0.5 µA leakage at 2.5 V full-scale, preserving measurement accuracy while surviving 30 kV ESD events. |
Use Scenario: Suppresses inductive kickback from 24 V solenoid drivers feeding PLC input modules via optocoupler inputs. IC Role / Device Role / Timing Role: Zener shunt placed across optocoupler LED anode to limit reverse voltage during coil de-energization. Use Value: Absorbs 150 mW peak energy without degradation, extending optocoupler lifetime in 100,000-cycle industrial cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode surge suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C6V8 (Nexperia) | Same 6.8 V nominal Zener, but 350 mW Pd, 40 Ω rd, SOD-523 package (1.3 × 0.85 × 0.6 mm). | Higher power handling suits higher-energy transients; larger footprint requires layout revision. | Select when surge energy exceeds 150 mW limits but UFP footprint is not mandatory. |
| MMSZ4688 (ON Semiconductor) | 6.8 V Zener, 500 mW Pd, 10 µA IR at 5.5 V, SOD-123 package (3.7 × 1.6 × 1.1 mm). | Lower ESD rating (±30 kV HBM only, no system-level spec), larger size increases parasitic inductance. | Choose for cost-sensitive industrial designs where board space and ESD level are secondary to BOM cost. |
Compared with BZX584-C6V8 and MMSZ4688, the RKZ6.8TJKJ#R1 offers the smallest footprint and certified system-level ESD performance, making it optimal for miniaturized consumer electronics where PCB real estate and robustness are co-constrained.
Availability
RKZ6.8TJKJ#R1 is available at Aetrix Electronics and suitable for USB interface protection, I²C bus stabilization, and low-power sensor signal conditioning requiring stable component supply across high-mix, low-volume production runs.
Supply support for RKZ6.8TJKJ#R1 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 markets.
The RKZ-KJ Series targets compact, high-reliability surge suppression in portable and space-constrained electronics - engineered specifically for ESD-critical data lines and low-power voltage references.
FAQ
What is the Zener voltage tolerance of RKZ6.8TJKJ#R1?
The RKZ6.8TJKJ#R1 has a guaranteed Zener voltage range of 6.65 V to 6.93 V at 5 mA test current, representing ±2.2% tolerance around the nominal 6.8 V rating. This tight spread ensures consistent clamping behavior across manufacturing lots and operating temperatures, critical for precision voltage reference and ESD protection applications where overvoltage margin must remain predictable.
Does RKZ6.8TJKJ#R1 meet IEC 61000-4-2 ESD requirements?
Yes, RKZ6.8TJKJ#R1 is rated for ±30 kV contact discharge per IEC 61000-4-2 (C = 150 pF, R = 330 Ω), tested in both forward and reverse directions with 10 pulses. This certification enables RKZ6.8TJKJ#R1 to serve as a standalone ESD protection device on consumer-facing ports like USB and audio jacks without requiring supplemental TVS arrays or layout shielding.
What is the thermal derating behavior of RKZ6.8TJKJ#R1 above 25°C?
RKZ6.8TJKJ#R1 derates linearly from its 150 mW maximum power dissipation at 25°C ambient, reaching zero allowable dissipation at approximately 150°C junction temperature. The exact slope is defined by the thermal resistance from junction to ambient (RθJA ≈ 833°C/W), meaning usable power drops by ~1.2 mW per °C rise above 25°C - a key constraint when RKZ6.8TJKJ#R1 is placed near heat sources on densely packed PCBs.
Can RKZ6.8TJKJ#R1 be used in bidirectional ESD protection configurations?
Yes, RKZ6.8TJKJ#R1 is routinely deployed in back-to-back pairs (anode-to-anode) to provide symmetrical ±6.93 V clamping for differential data lines such as USB D+/D− or RS-485. Each RKZ6.8TJKJ#R1 handles one polarity, leveraging its specified 30 kV HBM rating in both directions - eliminating the need for dedicated bidirectional TVS diodes in cost- and space-sensitive designs.
What is the package code and footprint compatibility of RKZ6.8TJKJ#R1?
RKZ6.8TJKJ#R1 uses the Ultra Small Flat Lead (UFP) package, JEITA code PWSF0002ZA-A, and is physically identical to the SC-79 outline (1.70 × 0.80 × 0.60 mm). It shares land pattern compatibility with other SC-79 devices like BZX584 series, though solder paste volume and reflow profile must be validated due to its unique lead-exposed cutting plane and thermal mass.
RKZ6.8TJKJ#R1 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:
- -
RKZ6.8TJKJ#R1 FAQ
1.How can I place an order for RKZ6.8TJKJ#R1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ6.8TJKJ#R1 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 RKZ6.8TJKJ#R1 reliable?
The price and inventory of RKZ6.8TJKJ#R1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ6.8TJKJ#R1 is usually 5 days.
3.What payment methods are accepted for RKZ6.8TJKJ#R1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ6.8TJKJ#R1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ6.8TJKJ#R1?
RKZ6.8TJKJ#R1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ6.8TJKJ#R1 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 RKZ6.8TJKJ#R1?
For technical support, including RKZ6.8TJKJ#R1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ6.8TJKJ#R1 requirements.
6.How does Aetrix verify that RKZ6.8TJKJ#R1 is sourced from the original manufacturer or authorized distributors?
All RKZ6.8TJKJ#R1 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 RKZ6.8TJKJ#R1 meets industry standards.
7.What is the process for return or replacement of RKZ6.8TJKJ#R1?
All RKZ6.8TJKJ#R1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ6.8TJKJ#R1, 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 RKZ6.8TJKJ#R1 part is unused and in its original packaging.
Return procedure for RKZ6.8TJKJ#R1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ6.8TJKJ#R1 Tags
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