My Inquiry
My Account
Renesas RKZ3.9B2KG#P1
- Part No.:
- RKZ3.9B2KG#P1
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
RKZ3.9B2KG#P1.pdf
- Description:
- DIODE ZENER
- Quantity:
- Payment:
- Shipping:
Inventory:162,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RKZ3.9B2KG#P1 from Renesas Electronics is a silicon planar Zener diode optimized for surge absorption and voltage stabilization in low-power signal and supply rail protection circuits, with a nominal Zener voltage of 3.87–4.10 V at 5 mA, 10 μA maximum reverse current at 1.0 V, 130 Ω typical dynamic resistance, and 200 mW power dissipation on PCB.
For engineers reviewing the RKZ3.9B2KG#P1 datasheet, RKZ3.9B2KG#P1 pinout, RKZ3.9B2KG#P1 application, or RKZ3.9B2KG#P1 equivalent, this device serves as a compact, halogen-free, surface-mount voltage reference and transient clamp in space-constrained consumer, industrial, and communication interfaces requiring stable ±3% regulation and ESD immunity up to ±30 kV (HBM).
Technical Context
This Zener diode operates in reverse-biased breakdown mode to maintain a stable reference voltage under varying load and temperature conditions. Its ultra-small URP (SC-76A) package enables high-density mounting, while its halogen-free construction complies with modern environmental standards.
The device exhibits a negative temperature coefficient near 4 V (≈ –0.04 %/°C), enabling predictable drift behavior in stabilization circuits. It supports non-repetitive surge reverse power up to ~1.2 W for 100 ms (per Fig.4), making it suitable for transient suppression in I/O lines and sensor supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.87–4.10 V at IZ = 5 mA - defines stable clamping threshold for 3.3 V system rails |
| Reverse Current (IR) | ≤10 μA at VR = 1.0 V - ensures minimal leakage below knee voltage |
| Dynamic Resistance (rd) | 130 Ω max at IZ = 5 mA - determines regulation stiffness and output impedance |
| Power Dissipation (Pd) | 200 mW at Ta = 25°C on PCB - sets continuous thermal limit for board-level design |
| ESD Capability | ±30 kV HBM (C = 150 pF, R = 330 Ω) - qualifies for robust I/O port protection without external TVS |
| Junction Temperature (Tj) | –55 to +150°C - supports operation in extended industrial ambient environments |
| Package | URP (SC-76A), 1.7 × 0.9 × 0.45 mm - enables 0402-equivalent footprint with cathode/anode terminals |
Pinout & Package
Ultra-small Resin Package (URP, JEITA code SC-76A) with two terminals: anode (pin 2) and cathode (pin 1), marked by a laser-coded "3•9" on top surface. Dimensions: 1.70 mm (L) × 0.90 mm (W) × 0.45 mm (H). Cathode terminal is polarity-marked.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Cathode | Connected to regulated node or protected line; carries reverse current during clamping |
| 2 | Anode | Connected to ground or lower-potential reference; completes bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & Pb-free construction | Complies with RoHS and JEDEC J-STD-020 reflow profiles without compromising thermal reliability |
| Ultra-small URP package | Enables <1.0 mm² board area usage-ideal for wearables, IoT sensors, and portable USB peripherals |
| High ESD immunity (±30 kV HBM) | Eliminates need for secondary ESD protection in low-speed digital I/O and analog sensor inputs |
| Taped packaging (3,000 pcs/reel) | Supports automated SMT placement with standard 8 mm carrier tape and embossed pocket design |
Applications
| USB Interface Protection | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamping D+ and D− lines against ESD events and hot-plug transients in USB 2.0 peripheral designs. IC Role / Device Role / Timing Role: Zener clamp providing bidirectional overvoltage protection at signal level. Use Value: Maintains signal integrity below 4.1 V while surviving ±30 kV HBM strikes-reducing failure rate in field-deployed peripherals. | Use Scenario: Generating a precise reset threshold for 3.3 V microcontrollers using resistor-divider biasing. IC Role / Device Role / Timing Role: Stable voltage reference defining reset assertion level independent of supply ripple. Use Value: Delivers ±3% regulation tolerance and <130 Ω dynamic impedance-ensuring deterministic reset timing across temperature. |
| Sensor Supply Rail Stabilization | Low-Power Analog Front-End Clamp |
Use Scenario: Regulating bias voltage for MEMS accelerometers and temperature sensors in battery-powered nodes. IC Role / Device Role / Timing Role: Low-quiescent-current shunt regulator maintaining clean 3.9 V reference under variable load. Use Value: Draws ≤10 μA leakage at 1.0 V-extending battery life while delivering stable excitation for precision ADCs. | Use Scenario: Protecting op-amp inputs and ADC references from overvoltage in industrial sensor signal chains. IC Role / Device Role / Timing Role: Fast-response clamp limiting input swing to safe levels before front-end damage occurs. Use Value: Activates within nanoseconds at 4.1 V threshold-preventing latch-up in rail-to-rail amplifiers operating from 3.3 V supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V9 | Same nominal VZ (3.9 V), but SOD-323 package (1.7 × 1.3 mm); 300 mW Pd; 90 Ω rd | Higher power handling, slightly larger footprint; less suited for ultra-dense layouts | Select when higher surge margin or lower dynamic resistance is prioritized over minimal area |
| MMSZ4685 | VZ = 3.9 V (±5%), SOD-123 package (3.7 × 1.6 mm); 500 mW Pd; 100 Ω rd | Larger size and higher power rating; not halogen-free per default grade | Choose for legacy designs requiring proven qualification or higher thermal mass in non-space-constrained boards |
Compared with BZX584-C3V9 and MMSZ4685, RKZ3.9B2KG#P1 offers the smallest footprint (URP/SC-76A), halogen-free compliance, and optimized ESD robustness-making it preferred for next-generation compact, eco-compliant consumer and IoT endpoints where board area and environmental specs are critical.
Availability
RKZ3.9B2KG#P1 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset circuits, and sensor supply rail stabilization requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for RKZ3.9B2KG#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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and enterprise applications.
The RKZ-KG Series is part of Renesas' discrete protection portfolio, designed specifically for compact, high-reliability voltage stabilization and surge absorption in space-constrained, environmentally regulated electronic systems.
FAQ
What is the Zener voltage tolerance of RKZ3.9B2KG#P1?
The RKZ3.9B2KG#P1 has a Zener voltage range of 3.87 V to 4.10 V at 5 mA test current, corresponding to ±2.8% tolerance around the nominal 3.9 V rating. This tight tolerance ensures reliable clamping in 3.3 V system rails without excessive headroom or risk of premature conduction. The specification is guaranteed under standard test conditions (Ta = 25°C, pulse width = 40 ms) per Renesas REJ03G1512-0300.
Does RKZ3.9B2KG#P1 support lead-free reflow soldering?
Yes, RKZ3.9B2KG#P1 is a halogen-free and Pb-free device compliant with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and RoHS Directive 2011/65/EU. Its URP package is qualified for standard lead-free reflow profiles up to 260°C peak temperature, making it compatible with automated SMT assembly lines used for consumer and industrial PCBs.
What is the maximum reverse current specification for RKZ3.9B2KG#P1 at 1.0 V?
The maximum reverse current (IR) for RKZ3.9B2KG#P1 is 10 μA at VR = 1.0 V and Ta = 25°C. This low leakage ensures minimal power loss in standby mode and preserves signal integrity in high-impedance bias networks-critical for battery-operated sensor nodes and low-power reset circuits using RKZ3.9B2KG#P1 as a reference element.
Can RKZ3.9B2KG#P1 be used as a standalone ESD protector?
Yes, RKZ3.9B2KG#P1 is rated for ±30 kV HBM (C = 150 pF, R = 330 Ω) in both forward and reverse directions, meeting IEC 61000-4-2 Level 4 requirements for many end-equipment classes. While not a dedicated TVS diode, its robust ESD capability allows RKZ3.9B2KG#P1 to serve as a primary or secondary clamp in low-speed digital and analog I/O paths without additional protection components.
What is the thermal derating behavior of RKZ3.9B2KG#P1 above 25°C ambient?
RKZ3.9B2KG#P1 follows a linear thermal derating curve: its 200 mW power dissipation rating decreases by approximately 1.6 mW/°C above 25°C ambient, reaching zero at 150°C junction temperature. This behavior is defined in Fig.3 of the datasheet and must be applied in layout design-especially when mounted on small copper pads or in enclosed enclosures-to ensure RKZ3.9B2KG#P1 remains within safe operating limits under worst-case thermal conditions.
RKZ3.9B2KG#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:
- -
RKZ3.9B2KG#P1 FAQ
1.How can I place an order for RKZ3.9B2KG#P1 through Aetrix?
Please submit a Request for Quotation (RFQ) for RKZ3.9B2KG#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 RKZ3.9B2KG#P1 reliable?
The price and inventory of RKZ3.9B2KG#P1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ3.9B2KG#P1 is usually 5 days.
3.What payment methods are accepted for RKZ3.9B2KG#P1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ3.9B2KG#P1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RKZ3.9B2KG#P1?
RKZ3.9B2KG#P1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RKZ3.9B2KG#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 RKZ3.9B2KG#P1?
For technical support, including RKZ3.9B2KG#P1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ3.9B2KG#P1 requirements.
6.How does Aetrix verify that RKZ3.9B2KG#P1 is sourced from the original manufacturer or authorized distributors?
All RKZ3.9B2KG#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 RKZ3.9B2KG#P1 meets industry standards.
7.What is the process for return or replacement of RKZ3.9B2KG#P1?
All RKZ3.9B2KG#P1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ3.9B2KG#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 RKZ3.9B2KG#P1 part is unused and in its original packaging.
Return procedure for RKZ3.9B2KG#P1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RKZ3.9B2KG#P1 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
