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Renesas RKZ9.1B2KJ#R6
- Part No.:
- RKZ9.1B2KJ#R6
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ9.1B2KJ#R6.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:96,000
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Product details
Overview
RKZ9.1B2KJ from Renesas Electronics is a silicon planar Zener diode designed for surge absorption and voltage stabilization in low-power signal-line protection circuits, with a nominal Zener voltage of 9.1 V (8.85–9.23 V), 2 μA maximum reverse leakage at 6.0 V, 30 Ω dynamic resistance at 5 mA, and 150 mW power dissipation on PCB.
For engineers reviewing the RKZ9.1B2KJ datasheet, RKZ9.1B2KJ pinout, RKZ9.1B2KJ application, or RKZ9.1B2KJ equivalent, this device serves as a compact, surface-mount overvoltage clamp for I/O port protection, precision reference biasing, and transient suppression in consumer and industrial control interfaces where tight voltage tolerance and ESD robustness (±30 kV per IEC 61000-4-2) are required.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage under transient surges and steady-state bias conditions. Its ultra-small Flat Lead Package (UFP, JEITA code PWSF0002ZA-A, SC-79 compatible) enables high-density PCB layout while supporting automated SMT assembly via embossed taping.
It exhibits a negative temperature coefficient near 0 mV/°C at ~9.1 V (per Fig.2), enabling stable regulation across ambient temperatures from −55°C to +150°C. Non-repetitive surge reverse power capability exceeds 1 W for sub-millisecond transients (Fig.4), confirming suitability for IEC 61000-4-5 Level 3 surge immunity designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.85–9.23 V at IZ = 5 mA - defines clamping threshold for overvoltage protection and reference accuracy |
| Dynamic Resistance (rd) | 30 Ω max at IZ = 5 mA - ensures minimal voltage shift under load current variation |
| Reverse Leakage (IR) | 2 μA max at VR = 6.0 V - guarantees low standby power loss in always-on protection circuits |
| Power Dissipation (Pd) | 150 mW at Ta = 25°C on PCB - sets thermal design limit for continuous DC or low-duty-cycle pulse operation |
| ESD Capability | ±30 kV (HBM, C = 150 pF, R = 330 Ω) - meets IEC 61000-4-2 Level 4 for system-level ESD immunity |
| Junction Temperature (Tj) | 150°C max - supports reliable operation in enclosed or thermally constrained environments |
| Package | UFP (Ultra-small Flat Lead, SC-79) - 1.7 × 1.2 × 0.6 mm footprint ideal for space-constrained IoT sensor nodes and portable electronics |
Pinout & Package
UFP (Ultra-small Flat Lead) package: 2-terminal surface-mount device with cathode marked by dot; terminals exposed for soldering; lead material optimized for reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated output or protected node; reverse-biased during clamping; carries surge current to ground or rail |
| 2 | Anode | Connected to reference potential (e.g., GND or lower rail); completes conduction path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Emboss taping reel packaging | Enables high-speed pick-and-place assembly without manual handling or orientation errors |
| SC-79 / UFP footprint | 1.7 × 1.2 mm outline with 0.6 mm height - fits 0402-class board area while offering superior thermal mass vs. smaller packages |
| 150 mW rated power on PCB | Supports sustained clamping of moderate-energy transients (e.g., EFT bursts) without derating in standard FR-4 layouts |
| ±30 kV HBM ESD rating | Eliminates need for external ESD diodes in cost-sensitive USB, UART, and GPIO protection schemes |
| Negative tempco near zero | Temperature-induced VZ drift < ±0.05 %/°C around 9.1 V - maintains reference stability across −40°C to +85°C operating range |
Applications
| USB 2.0 Data Line Protection | Microcontroller GPIO Clamp |
|---|---|
Use Scenario: Protecting D+ and D− lines against ESD and cable discharge events in embedded USB peripherals. IC Role / Device Role: Bidirectional transient voltage suppressor placed between data line and ground. Use Value: Clamps fast transients to ≤12 V while adding <0.3 pF capacitance - preserves signal integrity up to 480 Mbps. |
Use Scenario: Safeguarding 3.3 V or 5 V microcontroller input pins from accidental overvoltage or hot-plug spikes. IC Role / Device Role: Low-leakage Zener clamp referenced to MCU VDD or GND. Use Value: Limits pin voltage to 9.1 V with only 2 μA leakage at 6 V - prevents latch-up without loading valid logic levels. |
| Industrial Sensor Signal Conditioning | Low-Power Reference Biasing |
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges) in battery-powered condition monitoring nodes. IC Role / Device Role: Precision shunt regulator providing stable 9.1 V bias independent of supply ripple. Use Value: 30 Ω dynamic resistance and <0.4% VZ tolerance ensure <±5 mV output variation under 1 mA load changes. |
Use Scenario: Generating a stable reference for ADC voltage dividers or comparator thresholds in energy-harvesting systems. IC Role / Device Role: Low-power Zener-based reference source drawing <5 μA quiescent current. Use Value: 150 mW rating allows operation from 12 V supplies with series resistor; 8.85–9.23 V range supports ±2.5% accuracy designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C9V1 (Nexperia) | Same 9.1 V nominal Zener, but SOD-523 package (1.3 × 0.8 mm); 200 mW Pd; 40 Ω rd; ±30 kV HBM | Smaller footprint but higher dynamic resistance reduces regulation precision under varying loads | Select when board area is critical and tighter VZ tolerance is not required |
| MMBZ5240BLT1G (onsemi) | 9.1 V Zener in SOT-23; 350 mW Pd; 17 Ω rd; 100 nA IR at 7.2 V; ±8 kV HBM | Higher power and lower rd, but significantly lower ESD rating limits use in unshielded I/O environments | Select for high-current biasing where ESD is managed upstream, e.g., internal power rails |
Compared with BZX584-C9V1 and MMBZ5240BLT1G, RKZ9.1B2KJ delivers optimal balance of ESD robustness, regulation precision, and thermal performance in ultra-compact UFP packaging-making it preferred for space-constrained, system-level ESD-critical applications like portable instrumentation and industrial edge nodes.
Availability
RKZ9.1B2KJ is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O clamping, industrial sensor biasing, and low-power reference generation requiring stable component supply and full traceability.
Supply support for RKZ9.1B2KJ 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 automotive, industrial, and IoT applications.
The RKZ-KJ Series is part of Renesas' discrete protection portfolio, engineered specifically for high-reliability, surface-mount surge absorption and voltage stabilization in space-constrained consumer and industrial electronics.
FAQ
What is the Zener voltage tolerance of RKZ9.1B2KJ?
The RKZ9.1B2KJ has a specified Zener voltage range of 8.85 V to 9.23 V at 5 mA test current, corresponding to ±2.5% tolerance about the nominal 9.1 V value. This tight tolerance ensures predictable clamping behavior in precision protection and reference circuits without requiring post-production calibration.
Does RKZ9.1B2KJ support automated SMT assembly?
Yes, RKZ9.1B2KJ is supplied in embossed taping reels compatible with standard pick-and-place equipment. Its UFP package (SC-79 footprint) and laser-marked cathode orientation enable reliable, high-yield placement in high-volume manufacturing of compact PCBs.
What is the maximum reverse leakage current for RKZ9.1B2KJ?
The RKZ9.1B2KJ specifies a maximum reverse leakage current (IR) of 2 μA at VR = 6.0 V. This ultra-low leakage minimizes standby power draw and avoids false triggering in high-impedance sensing or bias networks where even nanoamp-level currents matter.
Can RKZ9.1B2KJ be used for bidirectional ESD protection?
No - RKZ9.1B2KJ is a unidirectional Zener diode configured for cathode-to-anode reverse breakdown. For bidirectional ESD protection (e.g., USB data lines), two RKZ9.1B2KJ devices must be connected anode-to-anode in series, or a dedicated bidirectional TVS such as the RCLAMP0524P should be selected.
What is the thermal resistance junction-to-ambient for RKZ9.1B2KJ?
The RKZ9.1B2KJ does not specify a formal RθJA value, but its 150 mW power rating is defined "with P.C. Board" per the Absolute Maximum Ratings table. Derating follows the curve in Fig.3: power dissipation drops linearly to zero at 150°C ambient, implying effective RθJA ≈ 1000°C/W on standard FR-4 with minimal copper area.
RKZ9.1B2KJ#R6 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:
- -
RKZ9.1B2KJ#R6 FAQ
1.How can I place an order for RKZ9.1B2KJ#R6 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ9.1B2KJ#R6 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 RKZ9.1B2KJ#R6 reliable?
The price and inventory of RKZ9.1B2KJ#R6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ9.1B2KJ#R6 is usually 5 days.
3.What payment methods are accepted for RKZ9.1B2KJ#R6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ9.1B2KJ#R6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ9.1B2KJ#R6?
RKZ9.1B2KJ#R6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ9.1B2KJ#R6 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 RKZ9.1B2KJ#R6?
For technical support, including RKZ9.1B2KJ#R6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ9.1B2KJ#R6 requirements.
6.How does Aetrix verify that RKZ9.1B2KJ#R6 is sourced from the original manufacturer or authorized distributors?
All RKZ9.1B2KJ#R6 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 RKZ9.1B2KJ#R6 meets industry standards.
7.What is the process for return or replacement of RKZ9.1B2KJ#R6?
All RKZ9.1B2KJ#R6 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ9.1B2KJ#R6, 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 RKZ9.1B2KJ#R6 part is unused and in its original packaging.
Return procedure for RKZ9.1B2KJ#R6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ9.1B2KJ#R6 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
onsemi
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MMSZ5245BS-7-F
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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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