Diodes Incorporated TB1300H-13

Overview

TB1300H-13 from Diodes Incorporated is a bidirectional surface-mount thyristor surge protective device (TSPD) designed for primary-level overvoltage protection in telecom and data line interfaces. It features a 120V maximum repetitive off-state voltage (VDRM), 100A peak pulse current at 10/1000μs, 160V breakover voltage (VBO), 3.5V on-state voltage at 1A, and 120pF off-state capacitance - enabling robust transient suppression in DSL, T1/E1, and ISDN line cards.

For engineers reviewing the TB1300H-13 datasheet, TB1300H-13 pinout, TB1300H-13 application, or TB1300H-13 equivalent, key selection criteria include stand-off voltage margin vs. line operating voltage, peak pulse current rating under IEC 61000-4-5 8/20μs stress, off-state capacitance impact on high-frequency signal integrity, and SMB package thermal performance in dense PCB layouts.

Technical Context

This TSPD operates as a voltage-triggered crowbar device: it remains in high-impedance off-state until applied voltage exceeds its 160V breakover threshold, then latches into low-voltage conduction to shunt surge energy. Its bidirectional symmetry enables protection of AC-coupled lines without polarity concerns.

Thermal design relies on its 20°C/W junction-to-lead resistance and SMB package's ability to dissipate transient power via PCB copper; holding current (150–800mA) ensures reliable return to blocking state after surge decay, with recovery time ≤30ms.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking required. Molded plastic case rated UL 94V-0; terminals feature matte tin plating, solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SP1003-010 and TISP4240M3JR-S, TB1300H-13 delivers optimal balance of 120V system voltage margin, 400A 8/20μs surge capacity, and 120pF capacitance - making it preferred for telecom line cards requiring both robustness and signal fidelity.

Availability

TB1300H-13 is available at Aetrix Electronics and suitable for DSL line card protection, T1/E1 interface hardening, and ISDN BRI S/T port safeguarding requiring stable component supply and long-lifecycle support.

Supply support for TB1300H-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, specializing in high-reliability protection, power management, and signal integrity solutions for industrial, telecom, and computing markets.

TB1300H-13 belongs to Diodes' TB-series bidirectional TSPDs - engineered specifically for primary-level surge immunity in telecom infrastructure, with emphasis on GR-1089-CORE and IEC 61000-4-5 compliance, thermal robustness in SMB packages, and low-capacitance line protection.

FAQ

What is the maximum continuous operating voltage for TB1300H-13?

The maximum repetitive off-state voltage (VDRM) is 120V DC or RMS. This defines the highest steady-state line voltage the device reliably blocks without triggering. Operation above this voltage risks unintended conduction; designers must ensure system operating voltage plus tolerance remains below 120V, with margin for temperature drift (±0.1%/°C).

How does TB1300H-13 differ from unidirectional TVS diodes in surge protection?

TB1300H-13 is a bidirectional thyristor that latches into low-resistance conduction once triggered, offering lower clamping voltage than TVS diodes under high-current surges. Unlike TVS devices, it requires sufficient holding current (>150mA) to remain on and recover only after current falls below its holding threshold - making it ideal for AC-coupled telecom lines where sustained fault current is present.

Can TB1300H-13 be used without external current-limiting resistors?

Yes - its intrinsic latching behavior and 3.5V on-state voltage enable direct connection across protected lines without series resistors, provided the circuit can deliver ≥150mA holding current during clamping. However, designers must verify that source impedance allows adequate current to sustain conduction until surge energy dissipates, especially in low-impedance telecom loops.

What is the thermal derating guidance for TB1300H-13 in high-ambient environments?

With RθJA = 100°C/W, junction temperature rises significantly in still air. For ambient temperatures above 75°C, reduce peak pulse duty cycle or increase PCB copper area connected to the SMB leads. The 20°C/W RθJL value indicates thermal performance improves markedly when leads are soldered to ≥1cm² of 2oz copper, enabling operation up to +125°C ambient in well-designed layouts.