Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Renesas RKZ3.9BKV#P1

Name: RKZ3.9BKV#P1
Brand: Renesas
SKU: RKZ3.9BKV#P1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: RKZ3.9BKV#P1

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: RKZ3.9BKV#P1.pdf

Description:: DIODE ZENER

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:87,791

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

RKZ3.9BKV#P1 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and digital supply rails. It delivers a nominal zener voltage of 3.9 V (min 3.70 V, max 4.10 V) at 10 mA test current, with dynamic resistance of 130 Ω and power dissipation up to 700 mW in the SRP-F surface-mount package. It is used in voltage reference circuits for microcontroller reset supervision and sensor biasing.

For engineers reviewing the RKZ3.9BKV#P1 datasheet, RKZ3.9BKV#P1 pinout, RKZ3.9BKV#P1 application, or RKZ3.9BKV#P1 equivalent, this device serves as a compact, tape-and-reel–ready voltage clamp with verified ESD robustness (±30 kV per IEC 61000-4-2), stable temperature coefficient near zero crossing, and suitability for high-density PCB layouts.

Technical Context

The RKZ3.9BKV#P1 operates as a two-terminal shunt regulator, maintaining stable output voltage across varying load currents by conducting excess current to ground when input exceeds its zener threshold. Its planar construction ensures repeatable breakdown characteristics and low leakage.

It features a junction temperature limit of 150°C and storage range from –55°C to +150°C, enabling use in industrial ambient conditions. The SRP-F flat-lead package supports reflow soldering and provides thermal performance validated on standard 50 × 50 mm glass-epoxy board with 10 × 10 mm solder land.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.70–4.10 V at I_Z = 10 mA - defines tight regulation window for 3.3 V system references.
Dynamic Resistance (r_d)	130 Ω max at I_Z = 10 mA - limits output voltage variation under load transients.
Power Dissipation (P_d)	700 mW at T_a = 25°C - supports continuous operation in compact SMT designs without forced cooling.
Reverse Current (I_R)	10 µA max at V_R = 1 V - ensures minimal quiescent current in standby-biased circuits.
ESD Capability	±30 kV (HBM, C = 150 pF, R = 330 Ω) - protects against handling and system-level electrostatic discharge events.
Junction Temperature (T_j)	150°C maximum - allows reliable operation in enclosed industrial enclosures with limited airflow.

Pinout & Package

Package: SRP-F (Small Resin Package Flat lead type), JEITA code LP, Renesas code PWSF0002ZB-A - a 2-pin, gull-wing surface-mount package optimized for high-density placement and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output node; reverse-biased terminal where zener breakdown occurs.
2	Anode	Connected to circuit ground or common return path; completes shunt regulation loop.

Key Features

Feature	Design Value
Taped packaging (3,000 pcs/reel)	Enables direct integration into SMT pick-and-place lines without manual handling or sorting.
Flat-lead SRP-F footprint	Reduces board area vs. traditional DO-35 or SOD-123; compatible with standard 0.65 mm pitch stencil apertures.
Low-temperature-coefficient region	Zener voltage drift near zero crossing (~3.9 V) minimizes thermal drift in unregulated supplies.
High ESD immunity	±30 kV HBM rating eliminates need for external TVS in many I/O protection schemes.

Applications

Microcontroller Reset Circuit	ADC Reference Stabilization
Use Scenario: Providing clean, stable 3.9 V reference to reset ICs like MAX809 or discrete RC-reset networks. IC Role / Device Role / Timing Role: Shunt voltage clamp that holds reset line low until V_CC rises above threshold. Use Value: Ensures deterministic power-on reset timing with <±200 mV tolerance over temperature and supply variance.	Use Scenario: Biasing precision ADC voltage references (e.g., REF3033) in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, low-drift auxiliary reference source for trimming or calibration paths. Use Value: Reduces reference drift contribution to <0.05 %/°C in 12-bit systems operating from –40°C to +85°C.
Sensor Signal Conditioning	Low-Power IoT Node Regulation
Use Scenario: Supplying stable bias to analog sensors (e.g., thermistors, RTDs) in battery-powered condition monitoring units. IC Role / Device Role / Timing Role: Passive voltage regulator establishing fixed excitation voltage independent of battery sag. Use Value: Maintains sensor linearity within ±0.3% error over 2.8–4.2 V Li-ion discharge curve.	Use Scenario: Regulating 3.3 V rail for BLE/Wi-Fi SoCs (e.g., ESP32, nRF52) in edge-node sensor hubs. IC Role / Device Role / Timing Role: Standby-mode voltage clamp preventing overvoltage during transient surges on shared power bus. Use Value: Eliminates need for active LDO in ultra-low-quiescent-current designs (<1 µA standby leakage).

Microcontroller Reset Circuit

ADC Reference Stabilization

Use Scenario: Providing clean, stable 3.9 V reference to reset ICs like MAX809 or discrete RC-reset networks.

IC Role / Device Role / Timing Role: Shunt voltage clamp that holds reset line low until V_CC rises above threshold.

Use Value: Ensures deterministic power-on reset timing with <±200 mV tolerance over temperature and supply variance.

Use Scenario: Biasing precision ADC voltage references (e.g., REF3033) in data acquisition modules.

IC Role / Device Role / Timing Role: Low-noise, low-drift auxiliary reference source for trimming or calibration paths.

Use Value: Reduces reference drift contribution to <0.05 %/°C in 12-bit systems operating from –40°C to +85°C.

Sensor Signal Conditioning

Low-Power IoT Node Regulation

Use Scenario: Supplying stable bias to analog sensors (e.g., thermistors, RTDs) in battery-powered condition monitoring units.

IC Role / Device Role / Timing Role: Passive voltage regulator establishing fixed excitation voltage independent of battery sag.

Use Value: Maintains sensor linearity within ±0.3% error over 2.8–4.2 V Li-ion discharge curve.

Use Scenario: Regulating 3.3 V rail for BLE/Wi-Fi SoCs (e.g., ESP32, nRF52) in edge-node sensor hubs.

IC Role / Device Role / Timing Role: Standby-mode voltage clamp preventing overvoltage during transient surges on shared power bus.

Use Value: Eliminates need for active LDO in ultra-low-quiescent-current designs (<1 µA standby leakage).

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ4V3T1G	Zener voltage 4.3 V (min 4.01 V, max 4.59 V); higher V_Z, lower r_d (15 Ω), same SRP-F package.	Less suitable for 3.3 V system references due to 4.3 V nominal; better for 5 V rail clamping.	Select when tighter dynamic resistance and higher V_Z tolerance are required, not for direct 3.9 V replacement.
BZX84-C3V9	Zener voltage 3.9 V (min 3.7 V, max 4.1 V); same V_Z range but SOT-23 package (larger footprint, higher r_d = 90 Ω).	Compatible functionally but requires PCB layout change; lower ESD rating (±8 kV HBM).	Choose only if SRP-F footprint is unavailable and SOT-23 assembly infrastructure is already in place.

Compared with MMSZ4V3T1G and BZX84-C3V9, the RKZ3.9BKV#P1 offers optimal balance of 3.9 V accuracy, ultra-low leakage, and industry-leading ±30 kV ESD immunity in the smallest flat-lead package-making it preferred for space-constrained, high-reliability industrial sensing nodes.

Availability

RKZ3.9BKV#P1 is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC reference stabilization, sensor signal conditioning, and low-power IoT node regulation requiring stable component supply and long-term manufacturability.

Supply support for RKZ3.9BKV#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 IoT markets.

The RKZ-KV Series is part of Renesas' precision discrete portfolio, engineered specifically for stable, low-profile voltage regulation in space-constrained industrial and consumer electronics.

FAQ

What is the zener voltage tolerance of RKZ3.9BKV#P1 at 10 mA?

The RKZ3.9BKV#P1 has a guaranteed zener voltage range of 3.70 V to 4.10 V when tested at I_Z = 10 mA and T_a = 25°C. This ±0.2 V tolerance supports accurate 3.3 V system supervision without additional trimming components. The RKZ3.9BKV#P1 achieves this specification using silicon planar process control and 100% electrical screening.

Does RKZ3.9BKV#P1 support reflow soldering, and what is its maximum peak temperature?

Yes, RKZ3.9BKV#P1 is qualified for lead-free reflow soldering per J-STD-020. Its SRP-F package withstands peak temperatures up to 260°C for 10 seconds. Thermal performance is characterized on standard 50 × 50 mm FR-4 with 10 × 10 mm copper pads, ensuring reliability in high-volume SMT production. The RKZ3.9BKV#P1 maintains parameter integrity post-reflow.

How does the dynamic resistance of RKZ3.9BKV#P1 affect voltage regulation stability?

The RKZ3.9BKV#P1 specifies dynamic resistance ≤130 Ω at I_Z = 10 mA, meaning a 1 mA change in zener current causes ≤130 mV output shift. This directly determines regulation accuracy under load transients-critical in reset circuits where <±200 mV deviation could cause false triggering. The RKZ3.9BKV#P1's r_d is measured under pulsed conditions to reflect real-world switching behavior.

Is RKZ3.9BKV#P1 suitable for automotive applications?

No, RKZ3.9BKV#P1 is rated for Standard-grade applications per Renesas quality classification and is not qualified for automotive use. It lacks AEC-Q200 stress testing, extended temperature validation beyond –55°C to +150°C, or PPAP documentation. For automotive voltage reference needs, Renesas recommends the RV4145 series. The RKZ3.9BKV#P1 is intended for industrial, consumer, and computing equipment.

What marking appears on the RKZ3.9BKV#P1 package body?

The RKZ3.9BKV#P1 is laser-marked with "3 ⋅ 9" on the top surface, followed by a date code (e.g., "09G" for September 2009). This marking aligns with Renesas' standard coding for the RKZ-KV Series and enables traceability to wafer lot and assembly batch. The RKZ3.9BKV#P1 uses no alphanumeric prefix or suffix in its visible marking-only the voltage code and date code.

RKZ3.9BKV#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:: -

RKZ3.9BKV#P1 FAQ

1.How can I place an order for RKZ3.9BKV#P1 through Aetrix?

Please submit a Request for Quotation (RFQ) for RKZ3.9BKV#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 RKZ3.9BKV#P1 reliable?

The price and inventory of RKZ3.9BKV#P1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ3.9BKV#P1 is usually 5 days.

3.What payment methods are accepted for RKZ3.9BKV#P1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ3.9BKV#P1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RKZ3.9BKV#P1?

RKZ3.9BKV#P1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RKZ3.9BKV#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 RKZ3.9BKV#P1?

For technical support, including RKZ3.9BKV#P1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ3.9BKV#P1 requirements.

6.How does Aetrix verify that RKZ3.9BKV#P1 is sourced from the original manufacturer or authorized distributors?

All RKZ3.9BKV#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 RKZ3.9BKV#P1 meets industry standards.

7.What is the process for return or replacement of RKZ3.9BKV#P1?

All RKZ3.9BKV#P1 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ3.9BKV#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 RKZ3.9BKV#P1 part is unused and in its original packaging.

Return procedure for RKZ3.9BKV#P1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

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.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

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.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

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…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

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…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

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…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

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 …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

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…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

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…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

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…