Diodes Incorporated DFLZ16-7

Overview

DFLZ16-7 from Diodes Incorporated is a 16V, 1W surface-mount power Zener diode in PowerDI123 package, rated for 25mA test current with 15Ω maximum zener impedance and ±0.06%/°C temperature coefficient. It provides precise voltage regulation in low-power supply rails and overvoltage protection circuits operating from −55°C to +150°C.

For engineers reviewing the DFLZ16-7 datasheet, DFLZ16-7 pinout, DFLZ16-7 application, or DFLZ16-7 equivalent, this part serves as a high-reliability, automotive-qualified (Q-grade variant available) Zener reference in space-constrained industrial power management, DC-DC feedback networks, and ESD-tolerant voltage clamping designs.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled nominal voltage (16V, ±3.1% tolerance), low dynamic impedance (15Ω max at 25mA), and stable temperature coefficient (−0.06%/°C to +0.11%/°C). Its thermal resistance junction-to-soldering point is 9°C/W, enabling reliable 1W dissipation on FR-4 PCBs with standard 1"x1" copper pad layout.

The device uses a planar silicon junction structure, features matte tin–annealed copper leadframe terminals, and meets JEDEC reliability standards. Cathode identification is via molded band marking; no anode/cathode pin numbering applies-only polarity orientation matters in circuit placement.

Key Specifications

Pinout & Package

Package: PowerDI123 - surface-mount, single-ended, cathode-band-marked plastic package with exposed cathode tab for thermal conduction. Dimensions: 1.78 mm (D) × 3.70 mm (E) × 0.98 mm (A), weight ≈ 0.01 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DFLZ16-7, BZX84-C16-7 trades power robustness for size, while MMSZ5245B-7 improves voltage accuracy at half the power rating-making DFLZ16-7 optimal for 1W-capable, thermally constrained industrial regulation where ±3.1% tolerance is acceptable.

Availability

DFLZ16-7 is available at Aetrix Electronics and suitable for industrial power supply feedback, overvoltage clamp for MCU I/O, and low-power reference for sensors requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DFLZ16-7 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DFLZ series belongs to Diodes' Power Discrete product line, engineered specifically for high-reliability voltage regulation and protection in harsh-environment industrial and automotive power systems.

FAQ

What is the maximum continuous reverse voltage DFLZ16-7 can withstand before breakdown?

The DFLZ16-7 is specified for nominal 16V Zener voltage at 25mA test current, with guaranteed breakdown occurring between 15.3V and 17.1V. It is not rated for continuous operation above its nominal V_Z; sustained reverse voltage >17.1V may cause thermal runaway unless current is strictly limited by external series resistance to maintain P_D ≤1W.

Does DFLZ16-7 require a heatsink for 1W operation?

No heatsink is required. The PowerDI123 package achieves 1W dissipation on a standard 1.5"×1.5" FR-4 PCB with 2 oz. copper and a 1"x1" thermal pad per Diodes' layout guidelines. Its R_θJS of 9°C/W allows direct thermal transfer from die to solder joint, making external heatsinking unnecessary in compliant layouts.

Can DFLZ16-7 be used in automotive applications?

Yes-the automotive-qualified variant DFLZ16Q-7 is explicitly qualified to AEC-Q200 standards. While DFLZ16-7 itself is not AEC-Q200 certified, its construction, JEDEC qualification, and "Green" material set align with automotive supply chain requirements; however, functional safety-critical automotive use requires the Q-grade version.

How does the temperature coefficient affect regulation accuracy over temperature?

With a temperature coefficient ranging from −0.06%/°C to +0.11%/°C, DFLZ16-7 exhibits up to ±1.1% V_Z shift over its full −55°C to +150°C operating range. At 100°C ambient, this translates to ~±0.6V deviation from 16V nominal-acceptable for non-precision regulation but insufficient for metrology-grade references without compensation.