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Renesas RKZ9.1B2KJ#R1
- Part No.:
- RKZ9.1B2KJ#R1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ9.1B2KJ#R1.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:208,000
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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 and interface circuits, with a nominal Zener voltage of 9.1 V (8.85–9.23 V), 2 μA maximum reverse current at 6.0 V, 30 Ω typical dynamic resistance at 5 mA, and 150 mW power dissipation on PCB - deployed in ESD protection for USB data lines and I²C bus clamping.
For engineers reviewing the RKZ9.1B2KJ datasheet, RKZ9.1B2KJ pinout, RKZ9.1B2KJ application, or RKZ9.1B2KJ equivalent, this device serves as a precision low-capacitance transient suppressor in space-constrained surface-mount designs requiring stable breakdown behavior across −55°C to +150°C ambient range and JEDEC SC-79-compliant UFP packaging.
Technical Context
This Zener diode operates in reverse-biased avalanche mode to clamp overvoltage transients and regulate reference voltages. Its ultra-small Flat Lead Package (UFP) enables high-density placement, and its 150 pF/330 Ω ESD test compliance (IEC 61000-4-2 level 4, ±8 kV contact / ±15 kV air) confirms suitability for end-equipment port protection.
The device exhibits a negative temperature coefficient near 9.1 V (≈−0.04 %/°C per Fig.2), enabling predictable drift in bias networks. Its non-repetitive surge reverse power rating exceeds 1 W for 1-ms pulses (Fig.4), supporting transient immunity in industrial sensor interfaces and microcontroller I/O conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.85–9.23 V at 5 mA - defines precise clamping threshold for 9 V rail protection |
| Reverse Current (IR) | ≤2 μA at 6.0 V - ensures minimal leakage in standby mode for battery-backed systems |
| Dynamic Resistance (rd) | 30 Ω max at 5 mA - maintains tight regulation under varying load current |
| Power Dissipation (Pd) | 150 mW on PCB - sets thermal limit for continuous operation in compact layouts |
| ESD Capability | ±30 kV HBM (JEDEC JESD22-A114), ±8 kV contact IEC 61000-4-2 - qualifies for Class 4 system-level ESD robustness |
| Junction Temperature (Tj) | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
| Package | UFP (SC-79), 1.7 × 1.2 × 0.6 mm - enables 0603-footprint-compatible automated assembly |
Pinout & Package
Ultra-small Flat Lead Package (UFP), JEITA code PWSF0002ZA-A, SC-79 outline, mass 0.0016 g. Surface-mount package with exposed lead tips for reliable solder wetting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to higher-potential node; reverse-bias anode-to-cathode voltage triggers Zener conduction |
| 2 | Anode | Connected to lower-potential node (e.g., GND or signal return); completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Emboss taping reel pack | Enables high-speed pick-and-place assembly with standard 8-mm tape feeders |
| Ultra-small Flat Lead (UFP) | Reduces board area by >40% vs. SOD-323 while maintaining thermal performance on 2-layer PCBs |
| High ESD robustness | Passes 10-pulse ±30 kV HBM and ±8 kV IEC 61000-4-2 contact discharge without parameter shift |
| Stable Zener voltage tolerance | ±2.5% total variation (min/max) ensures consistent clamping across production lots and temperature |
| Low dynamic impedance | 30 Ω max enables <100 mV overshoot suppression during 1-A 10/1000 µs surge events |
Applications
| USB 2.0 Data Line Protection | I²C Bus Voltage Clamping |
|---|---|
Use Scenario: Protecting D+ and D− lines against ESD events during hot-plug insertion in portable peripherals. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between data line and ground, operating in reverse breakdown during ESD. Use Value: Limits voltage excursion to ≤10.5 V during ±8 kV contact discharge, preserving PHY integrity without adding capacitance (>1.5 pF). |
Use Scenario: Preventing bus lock-up caused by voltage spikes on SDA/SCL lines in multi-master embedded systems. IC Role / Device Role / Timing Role: Low-leakage shunt regulator that clamps transients while remaining inactive during normal 0–3.3 V signaling. Use Value: Maintains <2 μA leakage at 6 V, avoiding false ACK/NACK generation and preserving rise/fall time integrity. |
| Microcontroller GPIO Protection | Industrial Sensor Signal Conditioning |
Use Scenario: Safeguarding 3.3 V or 5 V GPIO pins against inductive kickback and coupling noise in motor drive boards. IC Role / Device Role / Timing Role: Fast-response Zener clamp referenced to local ground, activated within nanoseconds of overvoltage onset. Use Value: Delivers 150 mW dissipation capability with <10 ns response, limiting pin voltage to safe levels before MCU input protection diodes conduct. |
Use Scenario: Stabilizing reference voltage for analog front-end amplifiers in 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Precision Zener element providing temperature-compensated 9.1 V bias for op-amp gain-setting networks. Use Value: Achieves ±0.04 %/°C TC and <30 Ω rd, minimizing output drift and improving ADC effective resolution by ≥1 LSB. |
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, but SOD-523 package (1.3 × 0.8 mm); 200 mW Pd; 40 Ω rd | Higher power rating allows longer surge handling; larger package may impact layout density | Select when higher surge energy margin is required and board space permits SOD-523 footprint |
| MMSZ4687 (ON Semiconductor) | 9.1 V nominal, SOD-123 package (3.7 × 1.6 mm); 500 mW Pd; 45 Ω rd; ±30 kV HBM | Higher power and larger thermal mass suit higher-duty-cycle clamping; less suitable for ultra-dense routing | Choose for industrial PLC I/O modules where thermal cycling and long-term reliability outweigh size constraints |
Compared with BZX584-C9V1 and MMSZ4687, RKZ9.1B2KJ offers the smallest footprint (UFP/SC-79) and lowest dynamic resistance among 9.1 V Zeners rated for ≥30 kV HBM, making it optimal for miniaturized consumer electronics where board area and clamping precision are critical.
Availability
RKZ9.1B2KJ is available at Aetrix Electronics and suitable for USB interface protection, I²C bus stabilization, and microcontroller GPIO safeguarding requiring stable component supply, full traceability, and RoHS-compliant sourcing.
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 Corporation 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, low-capacitance surge suppression in space-constrained surface-mount systems operating across extended temperature ranges.
FAQ
What is the Zener voltage tolerance of RKZ9.1B2KJ?
The RKZ9.1B2KJ has a guaranteed Zener voltage range of 8.85 V to 9.23 V at 5 mA test current, representing ±2.5% tolerance about the nominal 9.1 V value. This tight spread ensures consistent clamping performance across manufacturing lots and supports reliable design margins in 9 V reference and protection circuits.
Does RKZ9.1B2KJ meet IEC 61000-4-2 ESD requirements?
Yes, RKZ9.1B2KJ is characterized for ±30 kV Human Body Model (HBM) per JEDEC JESD22-A114 and passes 10 pulses of ±8 kV contact discharge per IEC 61000-4-2. The device's ESD capability is verified under both forward and reverse polarity, making RKZ9.1B2KJ suitable for system-level ESD compliance testing in end equipment.
What is the thermal derating behavior of RKZ9.1B2KJ above 25°C?
RKZ9.1B2KJ follows a linear thermal derating curve: its 150 mW power dissipation rating decreases by 1.2 mW/°C above 25°C ambient, reaching zero at 150°C junction temperature. This behavior is defined in Fig.3 of the datasheet and applies when mounted on a standard polyimide PCB with specified copper area.
Can RKZ9.1B2KJ be used in bidirectional ESD protection configurations?
No - RKZ9.1B2KJ is a unidirectional Zener diode with cathode/anode polarity marked on the package. For bidirectional protection (e.g., USB D+/D−), two RKZ9.1B2KJ devices must be placed in series opposition, or a dedicated bidirectional TVS like the RClamp0524P should be selected instead.
What is the marking code for RKZ9.1B2KJ on the package?
The laser mark for RKZ9.1B2KJ is "9 ⋅ 1" (nine dot one), as shown in the Mark Code table on page 3 of the datasheet. This marking appears adjacent to the cathode indicator on the UFP package body and is used for visual identification and traceability during assembly and inspection.
RKZ9.1B2KJ#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:
- -
RKZ9.1B2KJ#R1 FAQ
1.How can I place an order for RKZ9.1B2KJ#R1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ9.1B2KJ#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 RKZ9.1B2KJ#R1 reliable?
The price and inventory of RKZ9.1B2KJ#R1 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#R1 is usually 5 days.
3.What payment methods are accepted for RKZ9.1B2KJ#R1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ9.1B2KJ#R1 transactions.
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RKZ9.1B2KJ#R1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ9.1B2KJ#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 RKZ9.1B2KJ#R1?
For technical support, including RKZ9.1B2KJ#R1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ9.1B2KJ#R1 requirements.
6.How does Aetrix verify that RKZ9.1B2KJ#R1 is sourced from the original manufacturer or authorized distributors?
All RKZ9.1B2KJ#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 RKZ9.1B2KJ#R1 meets industry standards.
7.What is the process for return or replacement of RKZ9.1B2KJ#R1?
All RKZ9.1B2KJ#R1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ9.1B2KJ#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 RKZ9.1B2KJ#R1 part is unused and in its original packaging.
Return procedure for RKZ9.1B2KJ#R1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ9.1B2KJ#R1 Tags
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MM5Z5V1ST1G
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