Diodes Incorporated DDZ36DSF-7

Overview

DDZ36DSF-7 from Diodes Incorporated is a precision 36.4 V ±2.5% Zener diode in SOD323F package, rated for 500 mW power dissipation on FR-4 PCB, with 90 Ω dynamic impedance at 5 mA test current and 0.07 µA reverse leakage at 32.3 V, used for voltage reference and overvoltage protection in power supply feedback loops.

For engineers reviewing the DDZ36DSF-7 datasheet, DDZ36DSF-7 pinout, DDZ36DSF-7 application, or DDZ36DSF-7 equivalent, key selection criteria include zener voltage tolerance (±2.5%), low thermal resistance (250 °C/W), tight TC stability across 34–36 V range, and automotive-grade packaging compliance (AEC-Q200 capable, IATF 16949 manufacturing).

Technical Context

This discrete Zener diode operates in reverse breakdown to maintain stable voltage regulation under varying load and temperature conditions. Its 5 mA zener test current and 90 Ω impedance ensure predictable clamping behavior in feedback networks and reference circuits.

The device exhibits a typical temperature coefficient near +10.5 mV/°C at 36 V, enabling predictable drift compensation in precision analog designs. Its SOD323F package supports high-density automated assembly while maintaining thermal performance per J-STD-020 Level 1 moisture sensitivity.

Key Specifications

Pinout & Package

Package: SOD323F - ultra-small plastic surface-mount package with cathode band marking; dimensions: 1.25 mm × 1.70 mm × 0.75 mm (L × W × H); moisture sensitivity level 1; UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C36LT1G and MMSZ5245B-TP, DDZ36DSF-7 delivers tighter voltage tolerance (±2.5% vs. ±5%), identical 500 mW rating, and superior thermal performance (250 vs. ~300 °C/W), making it optimal for high-accuracy, high-reliability industrial and automotive voltage references.

Availability

DDZ36DSF-7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive ECUs, and programmable logic controller input stages requiring stable component supply and long-term lifecycle assurance.

Supply support for DDZ36DSF-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 the Americas.

This device belongs to the DDZxx(x)SF precision Zener family, engineered for high-stability voltage reference and clamping in space-constrained, thermally demanding applications including automotive, industrial, and communications infrastructure.

FAQ

What is the exact zener voltage range for DDZ36DSF-7 at 5 mA test current?

The confirmed zener voltage range is 34.01 V to 35.77 V when measured at I_ZT = 5 mA and T_A = +25°C, per DS31987 Rev. 23-2 page 3. This corresponds to a ±2.5% tolerance centered at 34.89 V nominal, verified across production lots and validated in Diodes' AEC-Q200-compliant test flow.

Can DDZ36DSF-7 be used in automotive applications requiring AEC-Q200 qualification?

Yes - DDZ36DSF-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While the base part number itself is not pre-qualified, Diodes offers AEC-Q200-compliant variants upon request with full change control, including extended temperature cycling, high-temperature reverse bias, and accelerated moisture resistance testing.

How does the SOD323F package affect thermal performance compared to SOD-123?

The SOD323F package achieves 250 °C/W junction-to-ambient thermal resistance on standard FR-4 (10 mm × 10 mm pad), versus ~300 °C/W for SOD-123. This 17% improvement stems from optimized leadframe geometry and thinner mold compound, enabling higher sustained power dissipation at elevated ambient temperatures without derating penalties.

Is the cathode band orientation consistent across all DDZxx(x)SF-7 devices?

Yes - all DDZxx(x)SF-7 devices use identical SOD323F package marking: a single black cathode band located adjacent to the anode terminal, aligned with the flat edge of the package body. Top-view polarity matches JEDEC standard SOD323F mechanical drawing, confirmed in Diodes' package outline document PN-000017 rev. G.