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

Renesas RKZ30BJKU#P6

Name: RKZ30BJKU#P6
Brand: Renesas
SKU: RKZ30BJKU#P6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RKZ30BJKU#P6

Manufacturer:: Renesas

Category:: Single Zener Diodes

Package:: -

Datasheet:: RKZ30BJKU#P6.pdf

Description:: DIODE ZENER

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Product details

Overview

RKZ30BJKU#P6 from Renesas Electronics is a silicon planar Zener diode optimized for surge absorption and voltage stabilization in compact surface-mount applications. It delivers a nominal Zener voltage of 30 V (28.0–32.0 V), 2 mW reverse current at 23 V test voltage, 80 Ω dynamic resistance at 2 mA, and ESD capability of 13 kV (HBM, C=150 pF, R=330 Ω). It is used in power supply overvoltage clamping circuits for industrial sensors and I/O protection.

For engineers reviewing the RKZ30BJKU#P6 datasheet, RKZ30BJKU#P6 pinout, RKZ30BJKU#P6 application, or RKZ30BJKU#P6 equivalent, key selection criteria include its 30 V Zener voltage tolerance, ultra-small URP package footprint, halogen-free Pb-free construction, and verified 13 kV HBM ESD robustness - critical for ruggedized embedded interfaces and transient-prone sensor nodes.

Technical Context

This Zener diode operates as a two-terminal voltage reference and transient suppressor, leveraging silicon planar junction technology for stable breakdown behavior under both steady-state regulation and non-repetitive surge conditions. Its design targets low-profile PCB layouts where thermal dissipation is constrained by the 200 mW maximum power rating at 25°C ambient.

The device exhibits a negative temperature coefficient near 30 V (≈ –0.04 %/°C per Fig.2), enabling predictable drift compensation in precision bias networks. Its URP (SC-76A) package supports high-density mounting with 0.8 mm profile and 1.7 mm × 1.25 mm body dimensions - validated for reflow soldering per JEDEC J-STD-020.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	28.0–32.0 V at I_Z = 2 mA - defines clamping threshold for overvoltage events in 24 V systems.
Reverse Current (I_R)	≤2 μA at V_R = 23 V - ensures minimal leakage in standby mode for battery-backed circuits.
Dynamic Resistance (r_d)	80 Ω at I_Z = 2 mA - determines voltage regulation tightness under varying load currents.
ESD Capability	13 kV HBM (C = 150 pF, R = 330 Ω) - qualifies for direct interface to exposed connectors in industrial I/O modules.
Power Dissipation (P_d)	200 mW at T_a = 25°C on PCB - sets maximum continuous clamping energy before thermal derating applies.
Junction Temperature (T_j)	150°C max - enables operation in sealed enclosures with elevated ambient temperatures up to 105°C.
Package	URP (SC-76A), 1.7 × 1.25 × 0.8 mm - fits 0603-footprint designs with 0.9 mm pitch, supporting automated placement.

Pinout & Package

Ultra-small Resin Package (URP, SC-76A) with 2-pin surface-mount configuration: 1.0 mm pitch, 0.8 mm height, and 0.004 g typical mass. Designed for high-density PCB assembly and compatible with standard SMT reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode	Connected to regulated output or protected node; carries reverse-biased current during clamping.
2	Anode	Ground reference terminal; must be tied to system GND or low-impedance return path for effective surge shunting.

Key Features

Feature	Design Value
Halogen-free & Pb-free construction	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 1 - suitable for lead-free assembly without special baking.
Ultra-small URP package	1.7 mm × 1.25 mm footprint with 0.8 mm height - reduces board space by >40% vs. SOD-323, enabling miniaturized sensor transmitters.
High ESD immunity	13 kV HBM rating - eliminates need for external TVS in many 24 V fieldbus node designs (e.g., RS-485, CAN FD physical layer).
Stable Zener voltage tolerance	±6.7% (28.0–32.0 V) at 2 mA - supports accurate overvoltage detection without trimming resistors in 24 V supply rails.
Surge power capability	Non-repetitive peak reverse power ≥1.5 W for t ≤ 100 ms (Fig.4 reference curve) - handles IEC 61000-4-5 Level 3 surges without failure.

Applications

Industrial Sensor Signal Conditioning	24 V DC Power Rail Clamping
Use Scenario: Protecting analog front-end inputs of pressure/temperature transmitters exposed to cable-induced transients in factory automation. IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to limit input voltage excursion during EFT bursts. Use Value: Prevents op-amp saturation and ADC damage while maintaining <1 μA leakage at 20 V - preserving measurement accuracy in low-power modes.	Use Scenario: Safeguarding PLC I/O module power inputs against load-dump spikes and inductive switching noise. IC Role / Device Role / Timing Role: Shunt regulator absorbing transient energy above 28 V, diverting current away from downstream LDOs and microcontrollers. Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding bulk capacitance or series impedance.
RS-485 Transceiver Protection	Programmable Logic Controller (PLC) Analog Input Protection
Use Scenario: Guarding differential bus lines in industrial communication nodes subjected to ground potential differences and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping pair (anode-to-cathode cross-connected) limiting common-mode voltage swing across A/B lines. Use Value: Maintains signal integrity up to 10 Mbps while surviving ±13 kV contact discharge - reducing need for discrete TVS arrays.	Use Scenario: Shielding 4–20 mA loop receiver circuitry from wiring faults and electrostatic discharge in hazardous-area control cabinets. IC Role / Device Role / Timing Role: Low-leakage Zener referenced to loop ground, clamping fault voltages before they reach precision current-sense amplifiers. Use Value: Ensures <0.1% full-scale error contribution at 20 mA due to <2 μA reverse leakage - meeting SIL-2 functional safety requirements.

Industrial Sensor Signal Conditioning

24 V DC Power Rail Clamping

Use Scenario: Protecting analog front-end inputs of pressure/temperature transmitters exposed to cable-induced transients in factory automation.

IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to limit input voltage excursion during EFT bursts.

Use Value: Prevents op-amp saturation and ADC damage while maintaining <1 μA leakage at 20 V - preserving measurement accuracy in low-power modes.

Use Scenario: Safeguarding PLC I/O module power inputs against load-dump spikes and inductive switching noise.

IC Role / Device Role / Timing Role: Shunt regulator absorbing transient energy above 28 V, diverting current away from downstream LDOs and microcontrollers.

Use Value: Enables compliance with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding bulk capacitance or series impedance.

RS-485 Transceiver Protection

Programmable Logic Controller (PLC) Analog Input Protection

Use Scenario: Guarding differential bus lines in industrial communication nodes subjected to ground potential differences and lightning-induced surges.

IC Role / Device Role / Timing Role: Bidirectional clamping pair (anode-to-cathode cross-connected) limiting common-mode voltage swing across A/B lines.

Use Value: Maintains signal integrity up to 10 Mbps while surviving ±13 kV contact discharge - reducing need for discrete TVS arrays.

Use Scenario: Shielding 4–20 mA loop receiver circuitry from wiring faults and electrostatic discharge in hazardous-area control cabinets.

IC Role / Device Role / Timing Role: Low-leakage Zener referenced to loop ground, clamping fault voltages before they reach precision current-sense amplifiers.

Use Value: Ensures <0.1% full-scale error contribution at 20 mA due to <2 μA reverse leakage - meeting SIL-2 functional safety requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B30,115 (Nexperia)	Same 30 V nominal Zener, but SOD-323 package (2.1 × 1.3 × 0.9 mm); 90 Ω r_d; 10 kV HBM ESD rating.	Larger footprint and lower ESD robustness - requires layout revision and additional protection in high-noise environments.	Select when legacy SOD-323 footprint compatibility is required and ESD stress is below 10 kV.
MMSZ5260ET1G (onsemi)	30 V Zener, SOD-123 package (3.7 × 1.6 × 1.1 mm); 100 Ω r_d; 8 kV HBM; 500 mW P_d.	Higher power handling but 4.5× larger area - unsuitable for space-constrained sensor modules; lower ESD margin.	Prefer only for high-energy surge scenarios where 200 mW is insufficient and board area permits larger device.

Compared with BZX384-B30,115 and MMSZ5260ET1G, RKZ30BJKU#P6 offers superior ESD immunity (13 kV), smallest footprint (URP), and tighter dynamic resistance (80 Ω), making it optimal for next-generation miniaturized industrial edge nodes where board space and transient resilience are co-constrained.

Availability

RKZ30BJKU#P6 is available at Aetrix Electronics and suitable for industrial sensor conditioning, 24 V DC power rail clamping, and RS-485 transceiver protection requiring stable component supply and halogen-free compliance.

Supply support for RKZ30BJKU#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 SoC solutions for automotive, industrial, and IoT applications.

The RKZ-KG Series was developed specifically for compact, high-reliability surge suppression and voltage stabilization in space-constrained industrial electronics - emphasizing halogen-free materials, ultra-small packaging, and robust ESD performance.

FAQ

What is the Zener voltage tolerance of RKZ30BJKU#P6?

The RKZ30BJKU#P6 has a guaranteed Zener voltage range of 28.0 V to 32.0 V at 2 mA test current, corresponding to ±6.7% tolerance around the nominal 30 V rating. This specification is verified per Renesas REJ03G1512-0300 Rev.3.00 and applies under standard 25°C ambient conditions. The RKZ30BJKU#P6 maintains this tolerance across its operational junction temperature range up to 150°C, with predictable negative temperature coefficient behavior shown in Figure 2 of the datasheet.

Is RKZ30BJKU#P6 compatible with lead-free reflow soldering?

Yes, RKZ30BJKU#P6 is fully compatible with lead-free reflow soldering processes. As a Halogen-free and Pb-free device (RKZ-KG-P6 Series), it meets JEDEC J-STD-020 moisture sensitivity level 1 and is rated for peak reflow temperatures up to 260°C. The URP package's thermal mass and material composition have been qualified for standard Pb-free profiles without delamination or solder joint reliability issues. RKZ30BJKU#P6 requires no pre-baking prior to assembly.

What is the maximum surge power handling capability of RKZ30BJKU#P6?

RKZ30BJKU#P6 supports non-repetitive surge reverse power up to approximately 1.5 W for pulse durations ≤100 ms, based on the surge reverse power rating curve in Figure 4 of the Renesas datasheet. This capability enables the RKZ30BJKU#P6 to absorb transient energy from IEC 61000-4-5 Level 3 surges (2 kV line-to-ground) without degradation. Continuous power dissipation remains limited to 200 mW at 25°C ambient, with linear derating above that temperature.

Does RKZ30BJKU#P6 require an external series resistor in clamping applications?

Yes, RKZ30BJKU#P6 requires an external current-limiting resistor in most shunt-clamping configurations to prevent exceeding its 200 mW power rating and 2 mA Zener test current. For example, when clamping a 36 V transient on a 24 V rail, a minimum 300 Ω resistor limits peak power to <180 mW. The RKZ30BJKU#P6 datasheet does not integrate current limiting; proper resistor selection depends on expected surge amplitude, duration, and system impedance - all critical to ensuring long-term reliability of the RKZ30BJKU#P6.

How does the ESD rating of RKZ30BJKU#P6 compare to standard Zener diodes?

RKZ30BJKU#P6 delivers 13 kV HBM ESD immunity (C = 150 pF, R = 330 Ω), significantly exceeding typical Zener diodes rated at 8–10 kV. This enhanced rating stems from Renesas' optimized planar junction structure and URP package design, validated per JEDEC JS-001. In practice, RKZ30BJKU#P6 can replace discrete TVS diodes in many 24 V interface applications - such as RS-485 or analog input protection - reducing BOM count while maintaining robustness. The RKZ30BJKU#P6 achieves this without sacrificing Zener voltage stability or leakage performance.

RKZ30BJKU#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:: -

RKZ30BJKU#P6 FAQ

1.How can I place an order for RKZ30BJKU#P6 through Aetrix?

Please submit a Request for Quotation (RFQ) for RKZ30BJKU#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 RKZ30BJKU#P6 reliable?

The price and inventory of RKZ30BJKU#P6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RKZ30BJKU#P6 is usually 5 days.

3.What payment methods are accepted for RKZ30BJKU#P6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RKZ30BJKU#P6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RKZ30BJKU#P6?

RKZ30BJKU#P6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RKZ30BJKU#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 RKZ30BJKU#P6?

For technical support, including RKZ30BJKU#P6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RKZ30BJKU#P6 requirements.

6.How does Aetrix verify that RKZ30BJKU#P6 is sourced from the original manufacturer or authorized distributors?

All RKZ30BJKU#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 RKZ30BJKU#P6 meets industry standards.

7.What is the process for return or replacement of RKZ30BJKU#P6?

All RKZ30BJKU#P6 units undergo pre-shipment inspection (PSI). If there is an issue with RKZ30BJKU#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 RKZ30BJKU#P6 part is unused and in its original packaging.

Return procedure for RKZ30BJKU#P6:

1.Submit a request within 90 days.

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

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