Diodes Incorporated DLPT05-7

Overview

DLPT05-7 from Diodes Incorporated is a unidirectional surface-mount TVS diode designed for high-speed data line transient protection in USB, Ethernet, and RS-485 interfaces. It delivers 300W peak pulse power (8×20µs), clamps at 9.8V @ 1A, features 5V reverse standoff voltage, and exhibits only 1.9pF capacitance - enabling low-distortion signal integrity in 100Mbps+ serial links.

For engineers reviewing the DLPT05-7 datasheet, DLPT05-7 pinout, DLPT05-7 application, or DLPT05-7 equivalent, key selection criteria include its ultra-low capacitance for high-speed lines, IEC 61000-4-2 Level 4 ESD robustness (±30kV air/±30kV contact), IEC 61000-4-4 EFT compliance, SOT-23 footprint compatibility, and 75V V_RRM rating for 5V rail protection.

Technical Context

The DLPT05-7 operates as a unidirectional avalanche TVS diode with a 5V reverse standoff voltage (V_RWM) and 6.0V minimum breakdown voltage (V_BR). Its 9.8V clamping voltage at 1A peak pulse current ensures safe voltage limiting during transients while preserving signal fidelity on protected lines.

Designed for bidirectional data lines where ground-referenced protection suffices, it uses a single-diode configuration between line and ground. Its 1.9pF total capacitance (measured at 0V, 1MHz) minimizes signal degradation, and its 20µA max reverse leakage at VRWM supports low-power interface designs.

Key Specifications

Pinout & Package

DLPT05-7 is housed in an industry-standard SOT-23 package (JEDEC TO-236AB), measuring 2.9mm × 1.3mm × 1.0mm, with gull-wing leads compatible with automated reflow assembly. Moisture sensitivity level is MSL1 per J-STD-020D.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS diode applications.

Compared with SMAJ5.0A and TPD4E001DPYR, DLPT05-7 uniquely balances ultra-low capacitance (1.9pF), tight 9.8V clamping, and minimal SOT-23 footprint-making it optimal for discrete, high-speed, single-line protection where board area and signal integrity are critical.

Availability

DLPT05-7 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, Ethernet PHY line safeguarding, and RS-485 transceiver bus hardening requiring stable component supply across industrial, networking, and embedded design cycles.

Supply support for DLPT05-7 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-reliability protection, power management, and signal integrity solutions for industrial, computing, and communications markets.

The DLPT05-7 belongs to Diodes' Dataline Protection portfolio, engineered specifically for low-capacitance, high-immunity transient suppression on high-speed serial interfaces without compromising signal fidelity or board space.

FAQ

Is DLPT05-7 suitable for bidirectional data lines like RS-485?

Yes - DLPT05-7 is unidirectional but can protect bidirectional lines when used in pairs (one per line) referenced to ground. Its 5V V_RWM and 9.8V clamping ensure safe operation across typical RS-485 common-mode ranges (±7V), and its 1.9pF capacitance avoids skew or attenuation on full-duplex signals.

What is the maximum recommended trace length between DLPT05-7 and the protected IC?

For optimal ESD performance, keep the trace from DLPT05-7 cathode to ground plane under 5mm, and from anode to protected IC pin under 8mm. Longer traces increase inductance, raising clamping voltage during fast transients - verified via IEC 61000-4-2 testing on Diodes' reference layouts.

Does DLPT05-7 require derating at elevated ambient temperatures?

Yes - DLPT05-7's peak pulse power derates linearly above 25°C ambient, dropping to ~75% at +85°C and ~50% at +125°C per Figure 1 in DS30310 Rev. 10-2. This reflects junction-to-ambient thermal resistance (417°C/W) and must be considered in thermally constrained enclosures or high-power-density boards.

Can DLPT05-7 replace older DLPT05 variants in existing designs?

Yes - DLPT05-7 is a direct replacement for earlier DLPT05 versions (e.g., DLPT05-13-F) with identical electrical specs, SOT-23 footprint, and marking format. The "-7" suffix denotes tape-and-reel packaging (3000 units), and all revisions comply with RoHS 3 and halogen-free requirements per Note 3 in the datasheet.