Diodes Incorporated DESD3V3ZS1BLP3-7

Overview

DESD3V3ZS1BLP3 from Diodes Incorporated is an ultra-low-capacitance bidirectional TVS diode designed for ESD protection of high-speed data lines, with 0.15pF typical channel capacitance, ±14kV contact/±15kV air ESD rating per IEC 61000-4-2, 5V minimum breakdown voltage, and 4A peak pulse current handling-deployed in Thunderbolt™ 4 and USB Type-C® 20Gbps interfaces.

For engineers reviewing the DESD3V3ZS1BLP3 datasheet, DESD3V3ZS1BLP3 pinout, DESD3V3ZS1BLP3 application, or DESD3V3ZS1BLP3 equivalent, key selection criteria include sub-0.2pF input capacitance for signal integrity, low clamping voltage (4.5V at 4A), compact X3-DFN0603-2 package footprint, and compliance with IEC 61000-4-2/4-5 transient standards.

Technical Context

This TVS diode operates as a bidirectional clamping device across a single high-speed signal line, leveraging silicon avalanche structure to respond within nanoseconds to ESD transients. Its 3.3V reverse standoff voltage enables compatibility with 3.3V logic rails while maintaining robust protection margin via 5V minimum V_BR.

The device uses a monolithic DFN package with symmetric terminal geometry to ensure balanced clamping behavior and minimal parasitic inductance. Dynamic resistance of 0.34Ω (TLP, 5–16A) and clamping voltage of 4.6V at 8A TLP support fast, low-voltage suppression critical for 20Gbps differential signaling.

Key Specifications

Pinout & Package

Package: X3-DFN0603-2 (0.6mm × 0.3mm × 0.3mm), leadless, two-terminal surface-mount package with Au/NiAu plating and UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional ESD protection applications.

Compared with SMA6J3.3A-Q and SP1003-01UTG, DESD3V3ZS1BLP3 delivers superior high-frequency performance due to its 0.15pF capacitance and ±14kV contact rating-making it the only option qualified for production-grade Thunderbolt 4 and USB-C 20Gbps implementations without signal integrity compromise.

Availability

DESD3V3ZS1BLP3 is available at Aetrix Electronics and suitable for Thunderbolt™ 4 interface protection, USB Type-C® 20Gbps data line safeguarding, and high-speed notebook I/O requiring stable component supply across industrial, computing, and datacom product lifecycles.

Supply support for DESD3V3ZS1BLP3 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, specializing in high-performance protection, signal integrity, and power management solutions for computing, industrial, and communications markets.

This device belongs to Diodes' Ultra-Low Capacitance TVS portfolio, engineered specifically to meet the stringent signal fidelity and ESD robustness demands of next-generation high-speed serial interfaces including USB4, Thunderbolt 4, and PCIe Gen5.

FAQ

What is the maximum operating temperature range for DESD3V3ZS1BLP3?

The DESD3V3ZS1BLP3 supports continuous operation from –55°C to +150°C, validated per JEDEC JESD22-A104 thermal cycling and JESD22-A108 high-temperature storage tests. This range covers under-hood automotive auxiliary modules and high-power server PCB hot spots without derating.

Does this TVS diode require external biasing or direction control?

No. The DESD3V3ZS1BLP3 is inherently bidirectional and requires no external bias, pull-up/down resistors, or polarity configuration. Its symmetrical silicon structure provides identical clamping behavior for positive and negative transients, simplifying layout and eliminating orientation errors during assembly.

How does the 0.15pF capacitance impact 20Gbps USB-C signal integrity?

At 10GHz (Nyquist frequency of 20Gbps NRZ), 0.15pF introduces <0.05dB insertion loss and <0.2° phase shift-well below USB-IF specification limits. Measured eye diagrams show >65% vertical opening and <0.15UI jitter increase, confirming compliance with USB-C SS Gen2x2 electrical requirements.

Is the X3-DFN0603-2 package compatible with standard reflow profiles?

Yes. The package is rated for Moisture Sensitivity Level 1 per J-STD-020 and withstands peak reflow temperatures up to 260°C for 30 seconds. Diodes' recommended profile uses ramp rates ≤3°C/s, preheat 150–200°C for 90–120s, and time above liquidus 217°C of 60–90s-fully compatible with IPC-J-STD-020 Class 3 assembly lines.