Renesas RKZ6.8BKU-P#P6

Overview

RKZ6.8BKU-P#P6 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and power-supply feedback circuits. It delivers a nominal Zener voltage of 6.8 V (min 6.47 V, max 7.14 V) at 10 mA test current, with dynamic resistance of 30 Ω and 700 mW power dissipation in the SRP-F surface-mount package. It is used in voltage reference, overvoltage protection, and regulator shunt applications requiring stable DC biasing.

For engineers reviewing the RKZ6.8BKU-P#P6 datasheet, RKZ6.8BKU-P#P6 pinout, RKZ6.8BKU-P#P6 application, or RKZ6.8BKU-P#P6 equivalent, this device is selected for compact SMT designs needing tight-tolerance Zener regulation, ESD-hardened operation (±30 kV per IEC 61000-4-2), and thermal stability up to 150°C junction temperature.

Technical Context

This Zener diode operates in reverse-biased breakdown mode, maintaining a stable reference voltage across its terminals under controlled current conditions. Its planar construction ensures consistent voltage tolerance and low leakage, with specified reverse current ≤2 μA at VR = 3.5 V and junction temperature range from –55°C to +150°C.

The SRP-F flat-lead package enables high-density PCB layout while supporting automated tape-and-reel assembly (3,000 pcs/reel). Its thermal derating curve shows linear power reduction above 25°C ambient, reaching zero dissipation at 150°C - matching the absolute maximum junction temperature rating.

Key Specifications

Pinout & Package

Package: SRP-F (Small Resin Package Flat lead type), JEITA code PWSF0002ZB-A, dimensions 2.5 mm × 1.2 mm × 0.9 mm (L × W × H), taping format P (3,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ4687T1G and BZX84-C6V8, RKZ6.8BKU-P#P6 offers 40% higher power dissipation and 25–50% lower dynamic resistance, enabling tighter voltage control in higher-current feedback and clamp roles without thermal derating penalties.

Availability

RKZ6.8BKU-P#P6 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and embedded MCU reset circuits requiring stable component supply and long-term manufacturability.

Supply support for RKZ6.8BKU-P#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 timing solutions for industrial, automotive, and infrastructure markets.

The RKZ-KV Series is part of Renesas' discrete Zener portfolio engineered specifically for high-stability, surface-mount voltage regulation in space-constrained and thermally demanding applications.

FAQ

What is the Zener voltage tolerance of RKZ6.8BKU-P#P6?

The RKZ6.8BKU-P#P6 has a Zener voltage range of 6.47 V to 7.14 V at 10 mA test current, corresponding to ±5% tolerance around the nominal 6.8 V rating. This specification is guaranteed per the REJ03G1700-0100 datasheet and applies across the full operating temperature range of –55°C to +150°C. The RKZ6.8BKU-P#P6 achieves this tolerance through planar process control and laser trimming during final test.

Does RKZ6.8BKU-P#P6 support automated SMT assembly?

Yes, RKZ6.8BKU-P#P6 is supplied in tape-and-reel format (P abbreviation, 3,000 pcs/reel) compatible with standard pick-and-place equipment. Its SRP-F package features flat leads and precise dimensional control (2.5 × 1.2 mm body), ensuring reliable placement accuracy and solder joint formation. The RKZ6.8BKU-P#P6 meets IPC-JEDEC J-STD-020 moisture sensitivity level 1, eliminating bake requirements prior to reflow.

What is the maximum reverse current for RKZ6.8BKU-P#P6 at 3.5 V?

The maximum reverse current (I_R) for RKZ6.8BKU-P#P6 is 2 μA when reverse-biased at 3.5 V, as specified in the Electrical Characteristics table of the REJ03G1700-0100 datasheet. This low leakage ensures minimal error contribution in high-impedance reference or bias networks. The RKZ6.8BKU-P#P6 maintains this performance across its full storage temperature range (–55°C to +150°C).

Can RKZ6.8BKU-P#P6 be used in automotive under-hood applications?

RKZ6.8BKU-P#P6 supports junction temperatures up to +150°C and is rated for storage from –55°C to +150°C, meeting key thermal requirements for under-hood use. However, it is classified as a "Standard" quality grade device per Renesas documentation and is not qualified to AEC-Q101. For automotive applications, RKZ6.8BKU-P#P6 may be used in non-safety-critical subsystems (e.g., cabin sensors, infotainment power rails) subject to customer qualification - the RKZ6.8BKU-P#P6 itself does not carry automotive-specific certification.

How does the ESD rating of RKZ6.8BKU-P#P6 compare to typical Zener diodes?

RKZ6.8BKU-P#P6 is rated for ±30 kV human-body-model (HBM) ESD per IEC 61000-4-2, significantly exceeding the 8–16 kV typical of standard Zener diodes. This high immunity is achieved through optimized junction design and passivation, allowing direct integration into ESD-prone interfaces (e.g., sensor inputs, USB power lines) without supplemental TVS devices. The RKZ6.8BKU-P#P6 sustains this rating across both forward and reverse polarity stress pulses.