Renesas RKZ7.5BKV#P1

Overview

RKZ7.5BKV from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and power supply circuits, with a nominal Zener voltage of 7.5 V (min 7.06 V, max 7.84 V at I_Z = 10 mA), dynamic resistance of 30 Ω, power dissipation of 700 mW, and ESD capability of ±30 kV (HBM). It serves as a stable reference or clamp in compact DC-DC feedback loops and overvoltage protection stages.

For engineers reviewing the RKZ7.5BKV datasheet, RKZ7.5BKV pinout, RKZ7.5BKV application, or RKZ7.5BKV equivalent, key selection criteria include its SRP-F surface-mount package, tight 5% Zener tolerance, low 30 Ω impedance at 10 mA, temperature coefficient behavior near zero crossing (~0 mV/°C at ~7.5 V), and suitability for high-density PCB layouts requiring minimal board area.

Technical Context

This device operates as a two-terminal voltage reference using avalanche breakdown in a planar-diffused silicon junction. Its Zener voltage is specified at 10 mA test current, with dynamic resistance measured under the same condition to ensure predictable regulation slope in shunt regulator configurations.

The SRP-F flat-lead package enables automated SMT assembly and supports thermal dissipation up to 700 mW on standard FR-4 boards (50 × 50 mm, 1.6 mm thick) with 10 × 10 mm solder land - critical for maintaining junction temperature below 150°C in continuous operation.

Key Specifications

Pinout & Package

Package: SRP-F (Small Resin Package Flat lead type), JEITA code LP, Renesas code PWSF0002ZB-A - a compact 2-pin surface-mount package with 1.6 mm × 2.8 mm footprint and 0.6 mm height, optimized for high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C7V5 and MMSZ5235B, RKZ7.5BKV delivers the highest power rating (700 mW) in the smallest footprint among these 7.5 V Zeners, making it optimal for thermally demanding yet space-constrained shunt regulator implementations.

Availability

RKZ7.5BKV is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and low-power sensor biasing requiring stable component supply, consistent parametric performance, and RoHS-compliant SMT packaging.

Supply support for RKZ7.5BKV 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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.

The RKZ-KV Series was developed specifically for compact, high-reliability voltage regulation in space-constrained consumer and industrial power systems - emphasizing tight Zener tolerance, high ESD immunity, and SMT manufacturability.

FAQ

What is the Zener voltage tolerance of RKZ7.5BKV?

The RKZ7.5BKV has a Zener voltage range of 7.06 V to 7.84 V at 10 mA test current, corresponding to ±5.2% tolerance about the nominal 7.5 V value. This specification is guaranteed per the REJ03G1700-0100 datasheet and applies under standard test conditions (Ta = 25°C, pulse width = 40 ms). The RKZ7.5BKV maintains this tolerance across its qualified operating temperature range.

Does RKZ7.5BKV support automated SMT assembly?

Yes, RKZ7.5BKV is supplied in tape-and-reel format (3,000 pcs/reel) compatible with standard pick-and-place equipment. Its SRP-F package features flat leads and precise dimensional control (±0.1 mm), enabling reliable placement and soldering on fine-pitch PCBs. The RKZ7.5BKV's marking ("7 ⋅ 5") and cathode polarity indicator further support automated optical inspection.

What is the maximum power dissipation for RKZ7.5BKV?

The absolute maximum power dissipation for RKZ7.5BKV is 700 mW when mounted on a standard glass-epoxy board (50 × 50 mm, 1.6 mm thick) with a 10 × 10 mm solder land. Derating is required above 25°C ambient, following the curve in Figure 3 of the REJ03G1700-0100 datasheet. Exceeding this limit risks junction temperature exceeding 150°C and permanent device degradation.

How does RKZ7.5BKV perform under ESD stress?

RKZ7.5BKV is rated for ±30 kV human-body-model (HBM) ESD per JEDEC JESD22-A114, tested with C = 150 pF and R = 330 Ω in both forward and reverse directions. This rating is verified per the failure criterion defined in the IR specification and applies to the bare device prior to board assembly. The RKZ7.5BKV's robustness eliminates need for additional ESD protection in many end-equipment interfaces.

Is RKZ7.5BKV suitable for use as a voltage reference in precision circuits?

RKZ7.5BKV provides stable regulation with low dynamic resistance (30 Ω) and near-zero temperature coefficient (~0 mV/°C) near its 7.5 V nominal point, making it suitable for moderate-precision applications such as power supply feedback, clamping, and biasing. However, for high-accuracy references requiring ppm-level stability or active compensation, dedicated IC references remain preferred over the RKZ7.5BKV.