Diodes Incorporated DFLZ24-7

Overview

DFLZ24-7 from Diodes Incorporated is a 1.0W surface-mount power Zener diode in PowerDI123 package, rated for 24V nominal zener voltage (22.8–25.6V range) at 25mA test current, with 15Ω max zener impedance and ±0.06%/°C temperature coefficient - used for precision voltage regulation and overvoltage protection in automotive and industrial power rails.

For engineers reviewing the DFLZ24-7 datasheet, DFLZ24-7 pinout, DFLZ24-7 application, or DFLZ24-7 equivalent, key selection criteria include its 1W FR-4 PCB power dissipation, cathode-band polarity marking, JEDEC-qualified reliability, RoHS-compliant green construction, and thermal resistance of 9°C/W junction-to-soldering-point - critical for thermal design in space-constrained DC-DC feedback and clamp circuits.

Technical Context

This Zener operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its low 15Ω dynamic impedance ensures minimal voltage deviation across 1–25mA operating current range, while the ±0.06%/°C tempco enables predictable drift compensation in analog sensing and supply monitoring.

The PowerDI123 package delivers high thermal efficiency via direct cathode-tab solder connection to PCB copper, achieving 9°C/W junction-to-soldering-point thermal resistance - significantly lower than standard SOD-123 - enabling sustained 1W dissipation without external heatsinking in ambient temperatures up to +125°C.

Key Specifications

Pinout & Package

Package: PowerDI123 - molded green plastic housing (UL 94V-0), cathode identified by band marking, matte tin-plated copper leadframe, 0.01g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C24LT1G and 1N4749A, DFLZ24-7 uniquely combines surface-mount compatibility, 1W FR-4-rated power, AEC-Q reliability, and ultra-low R_θJS - making it optimal for thermally demanding, high-volume automotive and industrial PCBs where both performance and compliance are mandatory.

Availability

DFLZ24-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog input stages, telecom DC-DC feedback networks, and medical sensor supply regulation requiring stable component supply and long-term lifecycle support.

Supply support for DFLZ24-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with emphasis on high-reliability, energy-efficient components for automotive, industrial, and consumer markets.

DFLZ24-7 belongs to the PowerDI123 Zener diode product line, engineered specifically for high-power-density voltage regulation and transient suppression in space-constrained, thermally aggressive environments such as automotive ECUs and industrial automation controllers.

FAQ

What is the maximum continuous power dissipation for DFLZ24-7 on a standard PCB?

DFLZ24-7 delivers 1.0W continuous power dissipation when mounted on a 1.5" × 1.5" FR-4 PCB with 2 oz. copper and a 1" × 1" thermal pad under the cathode tab. Derating begins above +25°C ambient per the published power derating curve, reaching ~0.5W at +100°C ambient.

Is DFLZ24-7 qualified for automotive applications?

Yes - DFLZ24-7 is qualified to JEDEC standards referenced in AEC-Q for high-reliability operation and rated for –55°C to +150°C junction temperature. An automotive-specific variant (DFLZ24Q-7) is also available with additional PPAP documentation and extended testing.

How does the PowerDI123 package improve thermal performance over SOD-123?

PowerDI123 features an exposed cathode metal tab that forms a direct thermal path to the PCB, achieving 9°C/W junction-to-soldering-point resistance - versus ~110°C/W for standard SOD-123. This allows full 1W operation without heatsinks and improves long-term reliability under thermal cycling.

Can DFLZ24-7 be used in bidirectional ESD protection configurations?

Yes - its 1.2V forward voltage at 200mA and symmetric low-capacitance structure (<2pF at 1V reverse bias) enable effective bidirectional clamping. Paired with a series resistor, it protects sensitive inputs from ±15kV contact ESD per IEC 61000-4-2 when placed across signal lines referenced to 24V or ground.