Diodes Incorporated TB0720H-13

Overview

TB0720H-13 from Diodes Incorporated is a bidirectional surface-mount thyristor surge protective device (TSPD) designed for primary-level overvoltage clamping in telecom and data line interfaces. It features a 65 V maximum repetitive off-state voltage (VDRM), 100 A peak pulse current (10/1000 µs), 88 V breakover voltage (VBO), 3.5 V on-state voltage at 1 A, and 200 pF off-state capacitance - enabling robust protection of DSL, T1/E1, and PoE-powered Ethernet ports against lightning-induced surges.

For engineers reviewing the TB0720H-13 datasheet, TB0720H-13 pinout, TB0720H-13 application, or TB0720H-13 equivalent, key selection criteria include stand-off voltage margin relative to line operating voltage, peak surge current rating under IEC 61000-4-5 8/20 µs waveform, holding current compliance with load impedance, thermal resistance (RθJL = 20 °C/W), and UL 497B recognition for telecom safety certification.

Technical Context

This TSPD operates as a voltage-triggered crowbar device: it remains in high-impedance off-state until applied voltage exceeds its 88 V breakover threshold, then latches into low-voltage conduction mode until current falls below 150–800 mA holding current (IH). Its oxide-glass passivated junction ensures stable triggering and long-term reliability under repeated surge stress.

Designed for bidirectional AC line protection, it requires no polarity marking and delivers symmetrical clamping in both directions. The device's 0.1 %/°C positive temperature coefficient of breakdown voltage supports predictable derating across –40 °C to +150 °C junction temperature range, while its 20 °C/W junction-to-lead thermal resistance enables effective heat dissipation into PCB copper.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bidirectional, polarity-free case with matte tin-plated terminals. Dimensions: 4.3 mm × 3.6 mm × 2.2 mm (L × W × H), UL 94V-0 molded plastic body, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SP1003-065 and SP3022-065, TB0720H-13 offers superior balance of low on-state voltage (3.5 V), certified bidirectionality in one package, and UL 497B listing - making it optimal for space-constrained, safety-certified telecom line card designs where clamping efficiency and regulatory alignment are critical.

Availability

TB0720H-13 is available at Aetrix Electronics and suitable for DSL line interface protection, T1/E1 data line protection, and PoE power sourcing equipment requiring stable component supply, full traceability, and long-term lifecycle support.

Supply support for TB0720H-13 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 North America.

TB0720H-13 belongs to Diodes' TB-series bidirectional TSPDs - engineered specifically for primary-level surge immunity in telecom infrastructure, meeting GR-1089-CORE, IEC 61000-4-5, and UL 497B standards.

FAQ

What is the maximum operating temperature for TB0720H-13?

The TB0720H-13 has a specified junction temperature range of –40 °C to +150 °C and a storage temperature range of –55 °C to +150 °C. Its thermal resistance from junction to lead is 20 °C/W, allowing reliable operation at full rated surge current when mounted on adequate PCB copper area per the SMB footprint recommendations in DS30360.

Does TB0720H-13 require external triggering or bias circuitry?

No. TB0720H-13 is a self-triggering, voltage-activated thyristor device. It requires no gate drive, control signal, or external bias - switching automatically into low-impedance conduction when applied voltage exceeds its 88 V breakover threshold (VBO), and remaining latched until load current drops below its 150–800 mA holding current (IH).

How does TB0720H-13 coordinate with upstream GDTs or downstream TVS diodes?

TB0720H-13 is typically used as the primary protector in a coordinated cascade: a slow-acting GDT handles high-energy surges first, then the TSPD clamps residual voltage to protect faster secondary TVS devices. Its 100 A (10/1000 µs) rating and 88 V VBO provide precise voltage limiting after GDT sparkover, preventing overstress of downstream silicon-based protectors.

Is TB0720H-13 compliant with RoHS and halogen-free standards?

Yes. TB0720H-13 features a lead-free matte tin finish and green molding compound containing no halogens or antimony, fully compliant with EU Directive 2002/95/EC (RoHS) and JEDEC M122 specifications. Its RoHS status is documented in Diodes' official compliance statements and reflected in its "-13-F" ordering suffix.