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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > Thyristors

Diodes Incorporated TB0720L-13

Name: TB0720L-13
Brand: Diodes Incorporated
SKU: TB0720L-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TB0720L-13

Manufacturer:: Diodes Incorporated

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: TB0720L-13.pdf

Description:: THYRISTOR 65V 150A DO-214AA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TB0720L-13 from Diodes Incorporated is a bi-directional surface-mount thyristor surge protective device (TSPD) designed for AC line and telecom port protection. It provides 65V stand-off voltage, 30A peak pulse current (10/1000μs), 150A peak pulse current (8/20μs), 88V breakover voltage, and low 3.5V on-state voltage at 1A - deployed in DSL modems, PoE injectors, and industrial AC input stages.

For engineers reviewing the TB0720L-13 datasheet, TB0720L-13 pinout, TB0720L-13 application, or TB0720L-13 equivalent, key selection factors include verified bi-directional clamping behavior, SMB package thermal resistance (R_θJL = 30°C/W), off-state capacitance (100 pF @ 1 MHz), holding current range (150–800 mA), and junction temperature rating (−40°C to +150°C).

Technical Context

This TSPD operates as a voltage-triggered, self-resetting crowbar device with oxide-glass passivated junction. Its bi-directional symmetry enables single-device protection of AC lines without polarity concerns, and its positive temperature coefficient for breakover voltage (+0.1%/°C) ensures stable triggering across operating temperature.

It exhibits high off-state impedance (>1 GΩ at 65 V), fast response to transient overvoltages, and full recovery within 30 ms after conduction. The device sustains non-repetitive surge currents up to 15 A (8.3 ms half-sine) and maintains low on-state voltage (3.5 V) under 1 A load, minimizing power dissipation during clamping.

Key Specifications

Parameter	Value and Actual Design Meaning
Stand-off Voltage (V_DRM)	65 V - maximum continuous AC/DC voltage before conduction begins; sets minimum system operating margin.
Breakover Voltage (V_BO)	88 V - guaranteed turn-on threshold under specified test conditions; defines clamping initiation point.
Peak Pulse Current (I_PP)	30 A @ 10/1000 μs - surge handling capacity per GR-1089-CORE; validates robustness against lightning-induced transients.
On-State Voltage (V_T)	3.5 V @ I_T = 1 A - low conduction loss during clamping; limits power dissipation and thermal stress.
Holding Current (I_H)	150–800 mA - minimum current required to sustain conduction; determines automatic reset timing post-surge.
Off-State Capacitance (C_O)	100 pF @ 1 MHz, 2 V DC bias - minimal signal distortion in high-frequency data lines (e.g., ADSL/VDSL).
Junction Temp Range (T_j)	−40°C to +150°C - supports operation in harsh industrial or outdoor enclosures without derating.

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bi-directional device with no polarity marking; case material UL 94V-0 molded plastic; moisture sensitivity level 1 per J-STD-020A.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (A/K)	Bi-directional main terminals	Interchangeable; symmetric conduction path enables AC line protection without orientation constraints.
Case	Non-electrical mechanical reference	No internal connection; serves only as thermal path and mechanical anchor; not electrically isolated.

Key Features

Feature	Design Value
Oxide-glass passivated junction	Enables stable, repeatable breakover voltage and long-term reliability under repeated surge stress.
Bi-directional protection in single device	Eliminates need for back-to-back diac or dual-TSPD layout; reduces PCB area and BOM count by 50%.
High off-state impedance & low on-state voltage	Leakage <5 µA at 65 V ensures negligible standby power loss; 3.5 V clamp minimizes I²R heating during surge.
Thermal resistance R_θJL = 30°C/W	Supports rapid heat transfer to PCB copper; enables sustained operation at 15 A surge without thermal runaway.

Applications

DSL Line Interface Protection

PoE Power Sourcing Equipment (PSE)

Use Scenario: Protects twisted-pair DSL ports against induced surges from nearby lightning strikes or AC coupling faults.

IC Role / Device Role / Timing Role: Bi-directional crowbar clamping device that triggers within nanoseconds upon exceeding 88 V, shunting surge energy to ground.

Use Value: 100 pF off-state capacitance preserves signal integrity up to 30 MHz; 30 A 10/1000 μs rating meets ITU-T K.21 basic protection level.

Use Scenario: Safeguards 48 V DC power pairs in IEEE 802.3af/at PSE circuitry against ESD and accidental AC mains contact.

IC Role / Device Role / Timing Role: Standby-mode overvoltage protector that remains high-impedance until fault condition exceeds 88 V, then latches low-impedance state.

Use Value: Holding current window (150–800 mA) ensures reliable auto-reset after fault clears; SMB footprint fits tight PSE board spacing.

Industrial AC Input Stage

Smart Meter Communication Port

Use Scenario: Shields microcontroller-based metering front-ends from surges entering via 230 VAC mains input filters.

IC Role / Device Role / Timing Role: Primary surge suppression element placed before bridge rectifier; clamps both positive and negative half-cycles.

Use Value: 150°C max junction temperature allows direct mounting near heat-generating components; UL 94V-0 housing meets flame-retardancy requirements.

Use Scenario: Protects RS-485 or PLC communication interfaces in utility smart meters exposed to grid-switching transients.

IC Role / Device Role / Timing Role: Bidirectional transient suppressor placed across differential bus lines; responds identically to ± surges.

Use Value: Symmetric V_BO (±88 V) ensures balanced clamping; 65 V stand-off accommodates 48 V nominal bus with safety margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMBJ6.0CA	Unidirectional TVS diode; 6.0 V standoff; 100 A 8/20 μs rating; no holding current or latch behavior.	Lacks self-resetting capability; requires external current limiting; unsuitable for sustained overvoltage events.	Select only for low-energy ESD where fast response and no latch are preferred.
TPSMF6.0A	Uni-directional TVS; 6.0 V standoff; 200 W peak power; no gate control or latching mechanism.	Cannot hold during overvoltage; resets immediately after transient; higher leakage at rated voltage.	Prefer for signal-line ESD protection, not AC mains or PoE power rail clamping.

Compared with SMBJ6.0CA and TPSMF6.0A, TB0720L-13 delivers true latched clamping with automatic reset, enabling robust protection of power rails subject to prolonged overvoltage - critical for PoE and AC input where TVS diodes would fail catastrophically.

Availability

TB0720L-13 is available at Aetrix Electronics and suitable for DSL line interface protection, PoE power sourcing equipment, and industrial AC input stage designs requiring stable component supply, consistent surge performance, and UL-certified packaging.

Supply support for TB0720L-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.

TB0720L-13 belongs to the TB-series bi-directional TSPD product line, engineered specifically for cost-effective, self-resetting surge protection in AC-powered and telecom infrastructure applications.

FAQ

What is the maximum allowable continuous operating voltage for TB0720L-13?

The maximum repetitive off-state voltage (V_DRM) is 65 V DC or RMS AC. Operation above this value risks unintended triggering. Derating is required for capacitive loads (20% reduction) and elevated ambient temperatures per thermal resistance data (R_θJA = 120°C/W).

Does TB0720L-13 require a gate trigger circuit?

No. TB0720L-13 is a gateless, voltage-triggered thyristor. It conducts automatically when applied voltage exceeds its breakover voltage (88 V typical), with no external control signal needed. Its bi-directional symmetry eliminates polarity concerns in AC applications.

How does TB0720L-13 differ from standard TVS diodes in surge response?

Unlike TVS diodes that clamp and reset instantly, TB0720L-13 latches into low-impedance conduction until current falls below its holding threshold (150–800 mA). This enables sustained clamping during prolonged overvoltages - such as AC line faults - where TVS devices would thermally fail.

Can TB0720L-13 be used in parallel for higher surge current handling?

Parallel operation is not recommended due to manufacturing variations in breakover voltage (±5 V tolerance), which cause current imbalance and potential single-device failure. For higher I_PP, select a higher-rated part (e.g., TB1100L-13) or verify matched-bin pairing with characterization data.

TB0720L-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: DO-214AA, SMB

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Voltage - Breakover:: 88V

Voltage - Off State:: 65V

Voltage - On State:: 3.5 V

Current - Peak Pulse (8/20µs):: 150 A

Current - Peak Pulse (10/1000µs):: 30 A

Current - Hold (Ih):: 150 mA

Number of Elements:: 1

Capacitance:: 100pF

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

TB0720L-13 FAQ

1.How can I place an order for TB0720L-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for TB0720L-13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TB0720L-13 reliable?

The price and inventory of TB0720L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB0720L-13 is usually 5 days.

3.What payment methods are accepted for TB0720L-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB0720L-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TB0720L-13?

TB0720L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TB0720L-13 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TB0720L-13?

For technical support, including TB0720L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB0720L-13 requirements.

6.How does Aetrix verify that TB0720L-13 is sourced from the original manufacturer or authorized distributors?

All TB0720L-13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TB0720L-13 meets industry standards.

7.What is the process for return or replacement of TB0720L-13?

All TB0720L-13 units undergo pre-shipment inspection (PSI). If there is an issue with TB0720L-13, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TB0720L-13 part is unused and in its original packaging.

Return procedure for TB0720L-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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