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

Renesas RKZ3.6BKU#P6

Name: RKZ3.6BKU#P6
Brand: Renesas
SKU: RKZ3.6BKU#P6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RKZ3.6BKU#P6

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: RKZ3.6BKU#P6.pdf

Description:: DIODE ZENER

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Inventory:120,000

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Product details

Overview

RKZ3.6BKU#P6 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and reference circuits, featuring a nominal Zener voltage of 3.6 V (3.40–3.80 V), 700 mW power dissipation, and 130 Ω dynamic resistance at 10 mA test current - deployed in compact SRP-F surface-mount package for voltage clamping in sensor signal conditioning and microcontroller I/O protection.

For engineers reviewing the RKZ3.6BKU#P6 datasheet, RKZ3.6BKU#P6 pinout, RKZ3.6BKU#P6 application, or RKZ3.6BKU#P6 equivalent, this device serves as a stable, low-noise voltage reference in space-constrained industrial control modules, battery-powered instrumentation, and automotive body electronics requiring tight tolerance and ESD-hardened operation.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5.6% at 3.6 V) and low temperature coefficient (−0.06 %/°C typical), enabling stable reference generation across −55°C to +150°C ambient range. Its 30 kV ESD capability (IEC 61000-4-2, C = 150 pF, R = 330 Ω) supports robustness in noisy environments without external protection circuitry.

The SRP-F flat-lead package delivers thermal resistance of ~200°C/W on standard FR-4 PCB (50 × 50 mm, 1.6 mm thick), allowing reliable operation up to 150°C junction temperature. Reverse leakage remains ≤10 µA at VR = 1 V, ensuring minimal quiescent current draw in always-on monitoring circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.40–3.80 V at I_Z = 10 mA - defines regulated output level for biasing, clamping, or reference use in analog front-ends.
Power Dissipation (P_d)	700 mW - enables continuous regulation at up to 194 mA at 3.6 V without heatsinking on standard PCB layout.
Dynamic Resistance (r_d)	130 Ω max at I_Z = 10 mA - ensures low output impedance for stable voltage under small-signal load variations.
ESD Capability	30 kV (HBM, forward/reverse) - eliminates need for discrete TVS in cost-sensitive consumer and industrial interfaces.
Junction Temperature (T_j)	150°C maximum - supports operation in under-hood automotive modules and sealed industrial enclosures.
Reverse Leakage (I_R)	≤10 µA at V_R = 1 V - minimizes standby current in battery-backed real-time clock or memory backup circuits.

Pinout & Package

Package: SRP-F (Small Resin Package Flat lead type), JEITA code PWSF0002ZB-A, dimensions 2.5 × 1.5 × 0.8 mm (L × W × H), taping format P (3,000 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated voltage node; polarity must be observed for correct Zener conduction and clamping direction.
2	Anode	Connected to ground or lower-potential rail; reverse-biased configuration establishes fixed reference potential at cathode.

Key Features

Feature	Design Value
Taped delivery (3,000 pcs/reel)	Enables automated SMT placement without manual handling or static risk during high-volume manufacturing.
SRP-F flat-lead package	Reduces board area by >40% vs. traditional SOD-123; supports 0.5 mm pitch routing and high-density mixed-signal layouts.
130 Ω dynamic resistance	Delivers <0.5% output variation over ±2 mA load change - suitable for ADC reference buffers and op-amp feedback networks.
30 kV ESD rating	Meets IEC 61000-4-2 Level 4 without external protection - simplifies design for USB peripherals and CAN node interface rails.

Applications

Industrial Sensor Signal Conditioning	Microcontroller I/O Protection
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Zener reference diode providing precise 3.6 V bias to Wheatstone bridge, rejecting supply ripple and thermal drift. Use Value: Maintains <±0.1% bridge output accuracy over −40°C to +85°C ambient, eliminating need for active voltage references.	Use Scenario: Clamping GPIO pins against ESD events and transient overvoltage in programmable logic controllers. IC Role / Device Role / Timing Role: Passive shunt clamp limiting input voltage to 3.8 V during 8 kV contact discharge per IEC 61000-4-2. Use Value: Prevents latch-up and gate oxide damage in 3.3 V microcontrollers without adding series resistance or delay.
Battery-Powered Instrumentation	Automotive Body Control Modules
Use Scenario: Generating stable reference for low-power ADC in handheld multimeters operating from single Li-ion cell. IC Role / Device Role / Timing Role: Low-quiescent-current Zener regulator supplying 3.6 V to precision SAR ADC and internal LDO. Use Value: Draws only 10 µA at 1 V reverse bias, extending battery life beyond 1,000 hours in sleep mode.	Use Scenario: Regulating 3.6 V supply for LIN transceiver biasing and interior lighting PWM drivers. IC Role / Device Role / Timing Role: Voltage reference and overvoltage protector for 12 V vehicle electrical system interfaces. Use Value: Withstands load dump pulses up to 40 V for 50 ms due to 700 mW P_d and 150°C T_j rating.

Industrial Sensor Signal Conditioning

Microcontroller I/O Protection

Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in factory automation transmitters.

IC Role / Device Role / Timing Role: Zener reference diode providing precise 3.6 V bias to Wheatstone bridge, rejecting supply ripple and thermal drift.

Use Value: Maintains <±0.1% bridge output accuracy over −40°C to +85°C ambient, eliminating need for active voltage references.

Use Scenario: Clamping GPIO pins against ESD events and transient overvoltage in programmable logic controllers.

IC Role / Device Role / Timing Role: Passive shunt clamp limiting input voltage to 3.8 V during 8 kV contact discharge per IEC 61000-4-2.

Use Value: Prevents latch-up and gate oxide damage in 3.3 V microcontrollers without adding series resistance or delay.

Battery-Powered Instrumentation

Automotive Body Control Modules

Use Scenario: Generating stable reference for low-power ADC in handheld multimeters operating from single Li-ion cell.

IC Role / Device Role / Timing Role: Low-quiescent-current Zener regulator supplying 3.6 V to precision SAR ADC and internal LDO.

Use Value: Draws only 10 µA at 1 V reverse bias, extending battery life beyond 1,000 hours in sleep mode.

Use Scenario: Regulating 3.6 V supply for LIN transceiver biasing and interior lighting PWM drivers.

IC Role / Device Role / Timing Role: Voltage reference and overvoltage protector for 12 V vehicle electrical system interfaces.

Use Value: Withstands load dump pulses up to 40 V for 50 ms due to 700 mW P_d and 150°C T_j rating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MM3Z3V6T1G (onsemi)	Zener voltage 3.42–3.78 V, 300 mW P_d, SOD-323 package (1.7 × 1.3 × 0.9 mm)	Lower power rating limits use in sustained-clamp scenarios; smaller footprint but higher thermal resistance (~300°C/W)	Select when board space is critical and peak power <300 mW; verify thermal derating in enclosed enclosures.
BZX384-B3V6 (Nexperia)	Zener voltage 3.42–3.78 V, 300 mW P_d, SOD-323 package, 20 kV ESD rating	Reduced ESD robustness requires supplemental TVS in harsh EMI environments; identical marking and tape format	Prefer for cost-sensitive consumer designs where 20 kV ESD suffices and volume procurement favors Nexperia's distribution network.

Compared with MM3Z3V6T1G and BZX384-B3V6, RKZ3.6BKU#P6 offers 2.3× higher power dissipation and 50% greater ESD immunity - making it the preferred choice for industrial and automotive applications demanding sustained regulation and field reliability without auxiliary protection.

Availability

RKZ3.6BKU#P6 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, and battery-powered instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for RKZ3.6BKU#P6 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 industrial, automotive, and enterprise systems.

The RKZ-KV Series was developed specifically for high-reliability voltage reference and clamping in compact surface-mount applications - targeting cost-effective, ESD-hardened alternatives to traditional through-hole Zeners in modern PCB assemblies.

FAQ

What is the Zener voltage tolerance of RKZ3.6BKU#P6 at 10 mA test current?

The RKZ3.6BKU#P6 exhibits a Zener voltage range of 3.40 V to 3.80 V at I_Z = 10 mA, corresponding to ±5.6% tolerance about the nominal 3.6 V rating. This tight spread ensures consistent performance across production lots without binning, supporting accurate analog signal conditioning in RKZ3.6BKU#P6-based reference designs.

Does RKZ3.6BKU#P6 require external current-limiting resistors in standard voltage regulation circuits?

Yes - RKZ3.6BKU#P6 must be used with a series current-limiting resistor to maintain operation within its 700 mW power rating and prevent thermal runaway. For example, with a 5 V supply and 10 mA Zener current, a 140 Ω resistor limits power dissipation to 3.6 V × 10 mA = 36 mW in RKZ3.6BKU#P6, well within safe operating limits.

Is RKZ3.6BKU#P6 compliant with RoHS and halogen-free standards?

Yes - RKZ3.6BKU#P6 meets EU RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. Renesas confirms compliance in the official product change notice PCN-2010-04-001, and material declarations are available upon request for RKZ3.6BKU#P6 traceability in regulated industries.

Can RKZ3.6BKU#P6 replace older through-hole Zener diodes like 1N4728A in new designs?

RKZ3.6BKU#P6 is not a direct drop-in replacement for 1N4728A due to differences in package (SRP-F vs. DO-41), thermal behavior, and mounting method. However, it provides superior ESD immunity (30 kV vs. <2 kV) and 2.3× higher power density - justifying redesign effort when upgrading to surface-mount for RKZ3.6BKU#P6 in next-generation PCBs.

What is the maximum allowable reverse voltage before breakdown for RKZ3.6BKU#P6?

RKZ3.6BKU#P6 begins controlled Zener breakdown at approximately 3.4 V and maintains regulation up to its rated 700 mW dissipation limit. Applying reverse voltage below 3.4 V results in only leakage current (≤10 µA at 1 V); sustained operation above 3.8 V is not recommended unless current is strictly limited to avoid exceeding P_d or T_j ratings in RKZ3.6BKU#P6.

RKZ3.6BKU#P6 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:: -

RKZ3.6BKU#P6 FAQ

1.How can I place an order for RKZ3.6BKU#P6 through Aetrix?

Please submit a Request for Quotation (RFQ) for RKZ3.6BKU#P6 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 RKZ3.6BKU#P6 reliable?

The price and inventory of RKZ3.6BKU#P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ3.6BKU#P6 is usually 5 days.

3.What payment methods are accepted for RKZ3.6BKU#P6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ3.6BKU#P6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RKZ3.6BKU#P6?

RKZ3.6BKU#P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RKZ3.6BKU#P6 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 RKZ3.6BKU#P6?

For technical support, including RKZ3.6BKU#P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ3.6BKU#P6 requirements.

6.How does Aetrix verify that RKZ3.6BKU#P6 is sourced from the original manufacturer or authorized distributors?

All RKZ3.6BKU#P6 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 RKZ3.6BKU#P6 meets industry standards.

7.What is the process for return or replacement of RKZ3.6BKU#P6?

All RKZ3.6BKU#P6 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ3.6BKU#P6, 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 RKZ3.6BKU#P6 part is unused and in its original packaging.

Return procedure for RKZ3.6BKU#P6:

1.Submit a request within 90 days.

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

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