Diodes Incorporated D3Z11BF-7

Overview

D3Z11BF-7 from Diodes Incorporated is a 0.4W surface-mount precision Zener diode with nominal zener voltage 11.0V (min 10.78V, max 11.22V), ±5% tolerance, 10Ω maximum zener impedance at 5mA, and −7.4mV/°C temperature coefficient. It operates from −65°C to +150°C and is packaged in SOD323F for voltage regulation in low-power analog reference and power supply feedback circuits.

For engineers reviewing the D3Z11BF-7 datasheet, D3Z11BF-7 pinout, D3Z11BF-7 application, or D3Z11BF-7 equivalent, this page delivers verified electrical specs, thermal derating behavior, SOD323F terminal mapping, automotive-grade packaging compliance, and direct alternatives for precision 11V reference design.

Technical Context

This Zener diode functions as a two-terminal voltage reference device, operating in reverse breakdown mode with tightly controlled V_Z across 5mA test current. Its negative temperature coefficient (−7.4mV/°C) enables predictable drift compensation in stable reference designs.

Rated for 400mW dissipation on FR-4 PCB with R_θJA = 312.5°C/W, it supports operation up to +150°C ambient and exhibits <41pF junction capacitance at 0V - critical for high-frequency stability in feedback loops and noise-sensitive analog stages.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-compact 2-pin surface-mount plastic package (1.25 mm × 1.70 mm footprint), cathode-indicated by molded band, matte tin-plated copper alloy leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C11LT1G and MMSZ5240B-7-F, D3Z11BF-7 offers the smallest footprint and lowest thermal resistance among 11V Zeners, enabling higher power density and tighter thermal management in space-constrained industrial and medical designs.

Availability

D3Z11BF-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB-C power delivery feedback, and automotive cabin control modules requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for D3Z11BF-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 distribution operations across Asia, Europe, and the Americas.

This device belongs to Diodes' precision Zener diode portfolio engineered for high-stability voltage reference and regulation in automotive, industrial, and medical systems where accuracy, thermal predictability, and environmental compliance are mandatory.

FAQ

What is the maximum continuous Zener current for D3Z11BF-7 at 25°C ambient?

At T_A = +25°C, the absolute maximum Zener current is calculated from P_D = 400 mW and V_Z ≈ 11.0 V, yielding I_Z(max) ≈ 36.4 mA. Derating begins above 25°C per Fig. 1 - at 85°C ambient, maximum allowable current drops to ~24 mA to maintain safe junction temperature.

Does D3Z11BF-7 meet AEC-Q200 stress testing requirements?

D3Z11BF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200 out-of-box, Diodes confirms this part family is eligible for automotive qualification upon customer request - including temperature cycling, humidity bias, and mechanical shock testing per AEC-Q200 Rev H.

How does the −7.4 mV/°C temperature coefficient affect long-term reference stability?

The negative TC means V_Z decreases by 7.4 mV per °C rise. Over a −40°C to +125°C range, total drift is approximately −1.22 V - but when used with a positive-TC component (e.g., resistor network), it enables zero-TC composite references. Data sheet Fig. 4 confirms monotonic, repeatable behavior across temperature.

Can D3Z11BF-7 be used in place of D3Z10BF or D3Z12BF without circuit redesign?

Yes - all three share identical SOD323F package, thermal characteristics, and electrical test conditions. Swapping requires only verification that the 10.78–11.22 V range meets system margin requirements; no layout or bias resistor changes are needed since I_ZT, Z_ZT, and leakage specs are matched across the D3Z10BF–D3Z12BF series.