Diodes Incorporated TB1500M-13-F

Overview

TB1500M-13-F from Diodes Incorporated is a bidirectional surface-mount thyristor surge protection device (TSPD) designed for telecom and data line transient suppression at the system interface. It features a 140V maximum repetitive off-state voltage (V_DRM), 50A peak pulse current (10/1000μs), 180V breakover voltage (V_BO), 3.5V on-state voltage at 1A, and 90pF off-state capacitance - enabling robust GR-1089-CORE and IEC 61000-4-5 compliance in DSL, T1/E1, and PoE-powered equipment.

For engineers reviewing the TB1500M-13-F datasheet, TB1500M-13-F pinout, TB1500M-13-F application, or TB1500M-13-F equivalent, key selection criteria include standoff voltage margin vs. line operating voltage, hold current stability over temperature, surge waveform derating (e.g., 250A @ 8/20μs), junction-to-lead thermal resistance (20°C/W), and SMB package compatibility with IPC-7351B layout standards.

Technical Context

This TSPD operates as a voltage-triggered crowbar device: it remains in high-impedance off-state until applied voltage exceeds its 180V breakover threshold, then latches into low-voltage conduction (≤3.5V) to shunt surge energy. Its bidirectional symmetry enables single-device protection of AC-coupled lines without polarity concerns.

Thermal design relies on its 20°C/W junction-to-lead resistance and 100°C/W junction-to-ambient rating; sustained conduction requires external current limiting to stay below 30A non-repetitive on-state rating and avoid thermal runaway. Off-state leakage remains ≤5μA up to 140V and -40°C to +150°C junction range.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount plastic case rated UL 94V-0, 3.3–3.94mm length × 4.06–4.57mm width × 1.96–2.21mm height, 0.093g weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMJ130CA and P6SMB150A, TB1500M-13-F delivers true latching behavior and inherent bidirectionality - critical for protecting AC-coupled telecom lines without added components or polarity constraints, while maintaining lower capacitance and superior thermal performance in SMB layout.

Availability

TB1500M-13-F is available at Aetrix Electronics and suitable for DSL line interface protection, T1/E1 telecom interface hardening, and PoE power sourcing equipment requiring stable component supply and long-term lifecycle support.

Supply support for TB1500M-13-F 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 and manufacturing operations across Asia and the Americas.

TB1500M-13-F belongs to the TB-series bidirectional thyristor surge protection devices, engineered specifically for telecom infrastructure and industrial data line applications demanding high surge immunity with minimal signal loading.

FAQ

What is the minimum trigger voltage for TB1500M-13-F?

The device has a maximum breakover voltage (V_BO) of 180V, meaning it will reliably trigger at or below this voltage under specified test conditions (I_BO = 50–800mA). Actual trigger point varies slightly with temperature and rate-of-rise, but remains within ±5% across -40°C to +125°C junction range per datasheet Figure 3.

Can TB1500M-13-F be used in DC power rail protection?

No - TB1500M-13-F is not recommended for DC power rail protection because its holding current (150–800mA) may prevent automatic reset after triggering, causing latch-up and potential damage. It is optimized for signal/data line protection where series impedance naturally limits post-trigger current.

How does TB1500M-13-F compare to standard TVS diodes in surge response time?

TB1500M-13-F exhibits typical turn-on delay of <100ns from surge onset to conduction, comparable to high-performance TVS diodes. However, its thyristor structure provides lower clamping voltage (3.5V vs. 15–25V for TVS) once triggered, due to latching behavior rather than avalanche breakdown.

Is the SMB package of TB1500M-13-F compatible with automated optical inspection (AOI)?

Yes - the SMB package uses matte tin-plated terminals and a green, halogen-free molding compound with consistent reflectivity. Its standardized DO-214AA outline and visible top-side marking "T150M" enable reliable detection and alignment verification during AOI and SPI processes per IPC-A-610 Class 2 requirements.