Diodes Incorporated DESDA5V3L-7

Overview

DESDA5V3L-7 from Diodes Incorporated is a dual-channel surface-mount TVS diode array designed for bidirectional ESD protection of high-speed data lines. It delivers ±9 kV contact and ±16 kV air discharge ESD immunity per IEC 61000-4-2, 300 W peak pulse power (8/20 µs), 5.3–5.9 V reverse breakdown voltage at 1 mA, and 220 pF channel input capacitance - enabling robust protection in USB 2.0, HDMI, and Ethernet interfaces.

For engineers reviewing the DESDA5V3L-7 datasheet, DESDA5V3L-7 pinout, DESDA5V3L-7 application, or DESDA5V3L-7 equivalent, this device serves as a low-capacitance, AEC-Q101-qualified transient suppressor for signal integrity-critical ports in computing peripherals, industrial communication modules, and automotive infotainment interfaces.

Technical Context

This dual-channel TVS array uses two independent avalanche diode pairs in a common-cathode configuration within a single SOT23 package. Each channel provides symmetrical clamping with 5.3–5.9 V breakdown and sub-0.3 Ω dynamic resistance at 15 A pulse, ensuring fast response (<1 ns) and low clamping voltage under ESD transients.

Its 220 pF input capacitance at 0 V and <2 µA reverse leakage at 3 V support high-speed signal paths up to 480 Mbps without distortion. Thermal derating follows a 500 °C/W junction-to-ambient resistance on standard FR-4 PCB layout, limiting continuous power dissipation to 250 mW at +25°C.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic case, 0.0089 g weight, UL 94V-0 rated molding compound, matte tin-plated Alloy 42 leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel TVS array applications.

Compared with SMAJ5.0A and TPD2E001DRYR, DESDA5V3L-7 uniquely balances 220 pF capacitance, ±16 kV air ESD rating, and SOT23 footprint - making it optimal for cost-sensitive, space-constrained USB 2.0 and industrial Ethernet designs requiring certified AEC-Q101 reliability.

Availability

DESDA5V3L-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and automotive infotainment data line safeguarding requiring stable component supply across production lifecycles.

Supply support for DESDA5V3L-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, serving industrial, computing, consumer, and automotive markets since 1964.

The DESDA5V3L-7 belongs to Diodes' TVS Diode Arrays product line, engineered specifically for high-reliability ESD suppression in high-speed digital interfaces while meeting stringent automotive and environmental compliance standards.

FAQ

What is the maximum clamping voltage of DESDA5V3L-7 at 20 A peak pulse current?

The datasheet specifies a maximum clamping voltage of 14.5 V at 20 A (8/20 µs waveform). This value is measured across each channel with the common cathode grounded, and reflects worst-case voltage seen by protected circuitry during an ESD event. It remains well below the 15 V absolute maximum rating of most 5 V tolerant I/O cells.

Can DESDA5V3L-7 be used for RS-485 bus protection?

Yes - its 5.3–5.9 V breakdown and bidirectional operation suit RS-485 half-duplex transceivers. With 220 pF capacitance per line, it maintains signal integrity up to 25 Mbps. Mounting must follow Diodes' AP02001 pad layout to ensure thermal performance and avoid solder wicking on the SOT23 leads.

Does DESDA5V3L-7 require external series impedance for optimal ESD performance?

No external series resistor is required for basic ESD protection, as the device clamps directly at the connector. However, adding a 0–10 Ω resistor between the TVS and protected IC improves energy sharing during multi-pulse events and reduces ground bounce. Diodes' application note AP02003 recommends ≤5 Ω for USB 2.0 implementations.

Is the SOT23 package of DESDA5V3L-7 compatible with reflow profiles for lead-free assembly?

Yes - the matte tin finish on Alloy 42 leads is qualified for standard Pb-free reflow profiles (J-STD-020 Level 1), with peak temperatures up to 260 °C. The device's moisture sensitivity level 1 eliminates bake requirements, and its 0.0089 g mass ensures uniform heating without tombstoning on fine-pitch PCBs.