Diodes Incorporated DDZ3V6ASF-7

Overview

DDZ3V6ASF-7 from Diodes Incorporated is a precision 0.5W surface-mount Zener diode with nominal zener voltage 3.57 V (min 3.45 V, max 3.69 V) at 20 mA test current, 130 Ω dynamic impedance, and 10 µA reverse leakage at 1 V reverse bias. It delivers tight voltage tolerance for voltage reference and regulation in low-power analog circuits, including sensor signal conditioning and ADC reference stabilization on FR-4 PCBs.

For engineers reviewing the DDZ3V6ASF-7 datasheet, DDZ3V6ASF-7 pinout, DDZ3V6ASF-7 application, or DDZ3V6ASF-7 equivalent, this part is selected for stable 3.6 V reference generation where ±3% initial tolerance, low thermal drift, and SOD323F package compatibility with automated assembly are critical design requirements.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable voltage across its terminals under varying load and temperature conditions. Its 130 Ω zener impedance at 20 mA ensures minimal output voltage variation with current changes, while the -65°C to +150°C operating range supports industrial and automotive ambient environments.

The device uses a silicon planar junction structure with cathode band marking and matte tin–annealed copper alloy leadframe for reliable solderability. Thermal resistance of 250°C/W (on 10 mm × 10 mm FR-4 pad) defines its power derating behavior above +25°C ambient, per Figure 1 in DS31987 Rev. 23-2.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-small plastic surface-mount package with molded "green" compound (UL 94V-0), cathode band marking, and matte tin–annealed copper alloy leadframe. Dimensions: 1.25 mm (D) × 1.70 mm (E) × 0.70 mm (A max), weight ≈ 0.004 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX384-C3V6 and MMSZ4685T1G, DDZ3V6ASF-7 offers tighter 3.45–3.69 V tolerance, lower 10 µA leakage, and optimized SOD323F thermal performance-making it preferred for space-constrained, high-accuracy 3.6 V reference designs.

Availability

DDZ3V6ASF-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, ADC reference stabilization, automotive cabin control panels, and low-power IoT node voltage regulation requiring stable component supply across extended temperature ranges and automated assembly compatibility.

Supply support for DDZ3V6ASF-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.

This device belongs to the DDZxx(x)SF precision Zener diode product line, engineered for high-accuracy voltage reference and regulation in space-constrained, thermally demanding applications such as automotive control units and industrial instrumentation.

FAQ

What is the maximum continuous Zener current for DDZ3V6ASF-7 at 75°C ambient?

At 75°C ambient, the device must be derated per Figure 1 in DS31987 Rev. 23-2. With R_θJA = 250°C/W and P_D = 500 mW at 25°C, maximum power at 75°C is 350 mW. For V_Z ≈ 3.57 V, this supports up to 98 mA continuous current, though practical design limits to 20 mA due to impedance and stability constraints.

Does DDZ3V6ASF-7 meet AEC-Q200 stress testing requirements?

DDZ3V6ASF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q200, Diodes states that automotive-grade change control-including qualification to AEC-Q200-is available upon request for this part family, subject to customer-defined test plans and program timelines.

How does the SOD323F package affect solder joint reliability compared to SOD123?

SOD323F's smaller 1.25 mm × 1.70 mm body and 0.40 mm lead pitch require tighter stencil aperture control but offer superior thermal cycling performance due to reduced mechanical strain. Its J-STD-020 Level 1 moisture sensitivity eliminates bake steps, improving first-pass yield in high-volume reflow lines versus moisture-sensitive SOD123 variants.

Can DDZ3V6ASF-7 replace DDZ3V6BSF in an existing design?

Yes-DDZ3V6ASF-7 and DDZ3V6BSF share identical electrical specs (3.45–3.69 V V_Z, 130 Ω Z_ZT, 10 µA I_R) and SOD323F packaging. The "A" suffix denotes tighter binning within the same production lot; no layout or schematic changes are needed for drop-in replacement, and long-term supply continuity is maintained.