Renesas RKZ24BKV#P1

Overview

RKZ24BKV#P1 from Renesas Electronics is a silicon planar Zener diode designed for precision voltage regulation in low-power analog and power-supply feedback circuits, with a nominal Zener voltage of 24.3 V (min 22.93 V, max 25.57 V), 5 mA test current, 60 Ω dynamic resistance, 700 mW power dissipation, and SRP-F surface-mount package. It operates as a shunt voltage reference in DC-DC converter error amplifiers and overvoltage clamp circuits.

For engineers reviewing the RKZ24BKV#P1 datasheet, RKZ24BKV#P1 pinout, RKZ24BKV#P1 application, or RKZ24BKV#P1 equivalent, this device serves as a stable, low-noise, temperature-compensated voltage reference for compact power management designs requiring ±5% regulation tolerance and ESD robustness up to 30 kV.

Technical Context

The RKZ24BKV#P1 implements a planar-diffused Zener junction optimized for stable breakdown at 24.3 V under 5 mA DC bias, with a positive temperature coefficient near +0.06 %/°C per Figure 2. Its SRP-F flat-lead package enables high-density PCB layout while maintaining thermal performance on standard FR-4 substrates.

It delivers 60 Ω dynamic impedance at 5 mA, ensuring minimal output voltage variation under load transients, and meets JEITA Package Code LP with 0.8 mm profile-critical for space-constrained consumer and industrial power modules where thermal derating above 25°C must be calculated using the published Pd vs. Ta curve.

Key Specifications

Pinout & Package

SRP-F is a 2-terminal surface-mount package with cathode-marked top-side marking and coplanar gull-wing leads. Thermal performance assumes solder land area of 10 × 10 mm on glass-epoxy board (50 × 50 mm, 1.6 mm thick).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RKZ24BKV#P1, BZX84-C24LT1G offers smaller size but reduced power handling, while MMSZ5245B-TP provides lower impedance at the cost of lower thermal margin-making RKZ24BKV#P1 optimal for 700 mW-capable layouts needing robust ESD and stable high-current regulation.

Availability

RKZ24BKV#P1 is available at Aetrix Electronics and suitable for AC-DC adapters, USB-C PD protection circuits, industrial sensor supplies, and PLC input protection requiring stable component supply with full traceability and RoHS compliance.

Supply support for RKZ24BKV#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 specializing in microcontrollers, analog power devices, and timing solutions for automotive, industrial, and IoT applications.

The RKZ-KV Series targets precision voltage regulation in compact power systems, engineered for stable Zener characteristics, high ESD resilience, and compatibility with automated SMT assembly lines.

FAQ

What is the Zener voltage tolerance of RKZ24BKV#P1 at 5 mA test current?

The RKZ24BKV#P1 has a Zener voltage range of 22.93 V to 25.57 V at I_Z = 5 mA, corresponding to ±5% tolerance around the nominal 24.3 V value. This specification is guaranteed per Renesas preliminary datasheet REJ03G1700-0100 Rev.1.00 and applies under standard test conditions (T_a = 25°C, pulse width = 40 ms). The RKZ24BKV#P1 maintains this tolerance across its qualified operating temperature range when used within derated power limits.

Does RKZ24BKV#P1 support lead-free reflow soldering processes?

Yes, RKZ24BKV#P1 is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its SRP-F package uses matte tin-plated terminals compatible with peak temperatures up to 260°C. The device's thermal profile tolerance is validated for standard Pb-free reflow cycles including ramp-to-spike and time-above-liquidus specifications. RKZ24BKV#P1 meets RoHS Directive 2011/65/EU and is marked with the RoHS-compliant logo on its tape reel packaging.

How does the dynamic resistance of RKZ24BKV#P1 affect voltage regulation stability?

The RKZ24BKV#P1 exhibits 60 Ω dynamic resistance at 5 mA, directly determining how much the Zener voltage shifts under varying load currents. For example, a 10 mA change in Zener current causes ~0.6 V deviation-critical for feedback loop accuracy in switching regulators. This value is measured per datasheet condition and remains stable across the device's operating temperature range, making RKZ24BKV#P1 suitable for applications demanding <1% output voltage drift under dynamic load steps.

Can RKZ24BKV#P1 replace older through-hole Zener diodes like 1N4749A in new designs?

RKZ24BKV#P1 is not a direct drop-in replacement for 1N4749A due to differing package, thermal behavior, and test conditions-but it serves the same 24 V regulation function with superior SMT compatibility and ESD robustness. Engineers must verify PCB layout changes for SRP-F footprint, recalculate thermal derating using the RKZ24BKV#P1 Pd vs. Ta curve, and confirm that 60 Ω r_d meets loop stability requirements. RKZ24BKV#P1 is recommended for new designs prioritizing miniaturization and automated assembly.

What is the maximum allowable ambient temperature for continuous operation of RKZ24BKV#P1 at full 700 mW power dissipation?

RKZ24BKV#P1 achieves its rated 700 mW power dissipation only at T_a = 25°C on a defined 50×50 mm glass-epoxy board with 10×10 mm solder land. As ambient temperature rises, power must be linearly derated: the datasheet specifies zero dissipation at 150°C junction temperature, yielding a derating slope of 11.7 mW/°C above 25°C. Thus, at 75°C ambient, maximum safe P_d drops to ~115 mW. RKZ24BKV#P1 must be thermally modeled in its final layout using these parameters.