Diodes Incorporated DESD2V5Z1BCSF-7

Overview

DESD2V5Z1BCSF-7 from Diodes Incorporated is a bidirectional TVS diode designed for ultra-low-capacitance ESD protection of high-speed data lines. It delivers 5 V breakdown voltage (VBR min = 5 V), clamps at 4.5 V under 3 A 8/20 µs surge, exhibits only 0.17 pF typical input capacitance, and meets IEC 61000-4-2 ±8 kV air/contact ESD immunity - making it suitable for USB3.1 and Thunderbolt 3 interface protection.

For engineers reviewing the DESD2V5Z1BCSF-7 datasheet, DESD2V5Z1BCSF-7 pinout, DESD2V5Z1BCSF-7 application, or DESD2V5Z1BCSF-7 equivalent, key selection criteria include channel input capacitance (<0.25 pF), clamping voltage at rated IPP, standoff voltage tolerance, thermal derating behavior, and compatibility with DSN0603-2 footprint constraints in space-constrained portable PCB layouts.

Technical Context

This device operates as a single-channel, bidirectional transient voltage suppressor optimized for signal integrity preservation in >5 Gbps serial interfaces. Its low dynamic impedance (0.4 Ω typical at 10 A TLP) and sub-0.2 pF capacitance minimize signal distortion and insertion loss up to 10 GHz, as confirmed by S21 attenuation measurements.

The X2-DSN0603-2 package features NiAu-bumped terminals and electrically active side walls requiring controlled soldering to avoid shorts. Thermal resistance is 500 °C/W on standard FR-4, with power derating beginning above 25 °C ambient per Figure 1.

Key Specifications

Pinout & Package

Package: X2-DSN0603-2 - 0.6 mm × 0.3 mm, 0.3 mm height, NiAu-bumped, moisture sensitivity level 1, side walls electrically active (avoid solder contact).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional low-capacitance TVS applications.

Compared with SMA6J2.5A-Q and SP1006-01UTG, DESD2V5Z1BCSF-7 uniquely balances sub-0.2 pF capacitance, 4.5 V clamping, and ±8 kV robustness in the DSN0603-2 package - making it optimal for next-generation USB and Thunderbolt interface protection where signal fidelity and compact layout are co-constrained.

Availability

DESD2V5Z1BCSF-7 is available at Aetrix Electronics and suitable for USB3.1 interface protection, Thunderbolt 3 data lane hardening, and high-speed HDMI auxiliary channel safeguarding requiring stable component supply across production volumes.

Supply support for DESD2V5Z1BCSF-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, specializing in high-performance protection, signal integrity, and power management solutions for consumer, computing, and industrial markets.

This device belongs to Diodes' DESD series of ultra-low-capacitance TVS diodes, engineered specifically for ESD protection of >5 Gbps serial data interfaces without compromising signal integrity or board space.

FAQ

What is the maximum operating temperature range for DESD2V5Z1BCSF-7?

The device is rated for junction and storage temperatures from –65 °C to +150 °C. Its thermal resistance (RθJA = 500 °C/W) requires power derating above 25 °C ambient - for example, maximum continuous power drops to ~150 mW at 85 °C board temperature per the derating curve in Figure 1 of DS43261.

Can DESD2V5Z1BCSF-7 be used on 3.3 V I/O lines?

Yes - its 2.5 V reverse standoff voltage (VRWM) and 5 V minimum breakdown ensure safe operation on 3.3 V rails. Clamping occurs at 4.5 V under 3 A surge, remaining below the 3.6 V absolute maximum rating of most 3.3 V logic interfaces, provided layout minimizes inductive overshoot.

Is the X2-DSN0603-2 package compatible with standard reflow profiles?

Yes - it is qualified for lead-free reflow per J-STD-020, with moisture sensitivity level 1. The NiAu bump terminations support standard SAC305 profiles; however, side-wall contact with solder paste must be avoided due to electrically active silicon sidewalls, as noted in the package outline documentation.

How does DESD2V5Z1BCSF-7 perform under lightning surge (IEC 61000-4-5)?

It is not rated for IEC 61000-4-5 line-to-line or line-to-ground surges. Its 25 W peak pulse power (8/20 µs) targets ESD and fast transient events only. For lightning-level protection, a coordinated two-stage approach using this device downstream of a gas discharge tube or high-energy MOV is required.