Diodes Incorporated TB1300M-13

Overview

TB1300M-13 from Diodes Incorporated is a bi-directional surface-mount thyristor surge protective device (TSPD) designed for primary-level AC/DC line protection in telecom and industrial interfaces. It features 120V stand-off voltage (VDRM), 160V breakover voltage (VBO), 50A peak pulse current (10/1000µs), 250A peak impulse current (8/20µs), and 90pF off-state capacitance - enabling robust GR-1089-CORE and IEC 61000-4-5 compliance in DSL, POTS, and PoE-powered equipment.

For engineers reviewing the TB1300M-13 datasheet, TB1300M-13 pinout, TB1300M-13 application, or TB1300M-13 equivalent, key selection criteria include verified bi-directional clamping behavior, junction temperature derating above 25°C, hold-current margin validation (IH = 150–800mA), and SMB package thermal resistance (RJL = 20°C/W) for sustained surge duty cycles.

Technical Context

This TSPD operates as a voltage-triggered silicon bilateral switch with oxide-glass passivated junction. Its positive temperature coefficient for VBO (+0.1%/°C) ensures stable triggering across –40°C to +150°C junction range, while low on-state voltage (VT = 3.5V @ 1A) minimizes power dissipation during conduction.

It functions exclusively in crowbar mode: once triggered by overvoltage exceeding VBO, it latches into low-impedance state until current falls below IH (150–800mA). Recovery time is ≤30ms, and off-state capacitance remains stable at 90pF under 2VDC bias at 1MHz - critical for high-frequency signal integrity in xDSL line cards.

Key Specifications

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bi-directional, polarity-free device with two terminals. Molded plastic case meets UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bi-directional thyristor surge protection applications.

Compared with TB1300M-13, SP1003-01FTG trades 50A lower 8/20µs surge capacity for 30% smaller footprint, while TISP4240M3JR-S offers improved VBO consistency at the cost of 25% higher off-state capacitance - both require revalidation of thermal layout due to differing RθJL values.

Availability

TB1300M-13 is available at Aetrix Electronics and suitable for DSL line cards, PoE PSE modules, industrial analog I/O terminals, and AC mains input stages requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TB1300M-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for high-reliability industrial, automotive, and communications systems.

TB1300M-13 belongs to the TBxxx0M series of bi-directional TSPDs engineered specifically for primary-level surge immunity in telecom line interfaces and AC/DC power entry circuits.

FAQ

What is the recommended PCB layout for optimal thermal performance?

Use ≥25 mm² of 2-oz copper connected directly to both leads, with thermal vias (≥4×0.3mm) to inner ground planes. Avoid solder mask over thermal pads. The SMB package's RJL of 20°C/W assumes this layout; insufficient copper raises junction temperature by up to 45°C at 30A surge, risking premature failure.

Does TB1300M-13 require external gate control or biasing?

No. TB1300M-13 is a passive, voltage-triggered device with no gate terminal. It operates autonomously: conduction initiates when voltage across its terminals exceeds VBO (160V typ), and sustains only while load current remains above IH (150–800mA). No external circuitry is needed for basic crowbar operation.

How does junction temperature affect breakover voltage stability?

VBO increases linearly with junction temperature at +0.1%/°C. At 125°C, VBO rises ~10% above its 25°C value (160V → ~176V), delaying trigger point. Designers must verify that worst-case VBO at max Tj still provides adequate margin below system insulation withstand voltage.

Can TB1300M-13 be used in DC-only applications like battery backup lines?

Yes - its bi-directional nature and 120V VDRM make it suitable for DC bus protection up to ±120V. However, ensure load current stays above IH (150mA min) during fault to maintain conduction until upstream fuse clears; otherwise, the device may self-commutate prematurely and allow re-strike.