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

Diodes Incorporated TB0720M-13-F

Name: TB0720M-13-F
Brand: Diodes Incorporated
SKU: TB0720M-13-F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TB0720M-13-F

Manufacturer:: Diodes Incorporated

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: TB0720M-13-F.pdf

Description:: THYRISTOR 65V 250A DO-214AA

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Product details

Overview

TB0720M-13-F from Diodes Incorporated is a bidirectional surface-mount thyristor surge protection device (TSPD) designed for primary-level transient overvoltage clamping in telecom and data line interfaces. It features a 65V maximum repetitive off-state voltage (V_DRM), 50A peak pulse current (10/1000μs), 88V breakover voltage (V_BO), 3.5V on-state voltage at 1A, and 140pF off-state capacitance - enabling robust GR-1089-CORE and IEC 61000-4-5 compliance in DSL, T1/E1, and ISDN line cards.

For engineers reviewing the TB0720M-13-F datasheet, TB0720M-13-F pinout, TB0720M-13-F application, or TB0720M-13-F equivalent, key selection criteria include stand-off voltage margin relative to operating line voltage, hold-current stability across temperature, surge waveform compatibility (8/20μs vs. 10/1000μs), and SMB package thermal performance under repeated surge stress.

Technical Context

This bidirectional TSPD operates as a voltage-triggered crowbar device: it remains in high-impedance off-state until applied voltage exceeds its symmetric breakover threshold (~88V), then latches into low-voltage conduction until current falls below holding current (150–800mA). Its oxide-glass passivated junction ensures stable V_BO with only +0.1%/°C temperature coefficient.

Unlike unidirectional TVS diodes, it provides symmetrical clamping without polarity sensitivity and maintains <5μA leakage at 65V - critical for maintaining signal integrity on balanced AC-coupled lines such as xDSL pairs. Recovery time is ≤30ms after surge removal, and thermal resistance (Junction-to-Lead = 20°C/W) supports sustained operation in SMB footprint.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	65V - Maximum continuous AC/DC line voltage the device blocks without triggering; sets minimum isolation margin for 48V telecom systems.
I_PP (10/1000μs)	50A - Peak surge current handling per IEEE/IEC standard; defines clamping energy capacity for long-duration lightning-induced surges.
V_BO	88V - Symmetric breakover voltage; determines clamping onset point for both polarities on balanced lines.
V_T @ 1A	3.5V - On-state voltage drop during conduction; directly impacts power dissipation (3.5W at 1A) and thermal design in SMB package.
C_O	140pF - Off-state capacitance at 2V DC bias and 1MHz; limits insertion loss and bandwidth degradation on high-speed data lines (e.g., ADSL2+).
I_H	150–800mA - Holding current range; must exceed steady-state fault current to ensure reliable latch-off after surge clears.
R_θJL	20°C/W - Junction-to-lead thermal resistance; enables calculation of junction temperature rise under sustained conduction (e.g., +70°C rise at 3.5W).

Pinout & Package

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

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (A/K)	Interchangeable bidirectional terminals	No functional distinction - either terminal serves as anode or cathode depending on instantaneous voltage polarity; enables single-device protection of AC or differential lines.
Case	Non-electrical mechanical interface	Plastic body provides electrical isolation; thermal path to PCB copper via soldered leads - critical for heat dissipation during surge events.

Key Features

Feature	Design Value
Bidirectional clamping	Enables single-component protection of balanced AC-coupled interfaces (e.g., T1, ISDN, xDSL) without external polarity management.
Oxide-glass passivated junction	Ensures ±0.1%/°C V_BO drift over –40°C to +150°C, maintaining consistent trigger margin across industrial temperature range.
UL Recognized Component	File E156346 confirms compliance with UL497B for primary circuit surge protection - reduces certification burden for end equipment.
Green molding compound	Halogen-free, antimony-free encapsulant meets IPC-4101D/89 requirements - supports RoHS and environmental compliance without performance trade-offs.

Applications

DSL Line Card Protection

T1/E1 Interface Protection

Use Scenario: Protects ADSL2+/VDSL2 line drivers and receivers from induced lightning surges on twisted-pair copper loops.

IC Role / Device Role / Timing Role: Primary crowbar protector placed before line transformer; triggers within nanoseconds when line voltage exceeds 88V.

Use Value: Limits clamped voltage to ≤3.5V during 50A surge, preventing damage to downstream transceivers while maintaining 140pF signal path capacitance for >2.2MHz bandwidth.

Use Scenario: Shields T1/E1 framer ICs and transformers from longitudinal surges per GR-1089-CORE requirements in central office and CPE equipment.

IC Role / Device Role / Timing Role: Standoff-rated (65V) bidirectional clamp on tip/ring pair; latches during 10/1000μs surges up to 50A.

Use Value: Maintains <5μA leakage at 48V nominal line voltage, preserving DC bias integrity while delivering 250A (8/20μs) surge capability per IEC 61000-4-5.

ISDN BRI Protection

Industrial Ethernet Surge Port

Use Scenario: Safeguards ISDN basic rate interface (2B+D) transceivers against fast transients from nearby switching loads or EFT.

IC Role / Device Role / Timing Role: Bidirectional overvoltage crowbar on both B-channels and D-channel; symmetric response eliminates need for dual unidirectional devices.

Use Value: 88V V_BO provides 20V margin above 64V ISDN peak line voltage, ensuring no false triggering during normal operation.

Use Scenario: Integrated into RJ45 port-level protection circuits for industrial Ethernet switches exposed to harsh EMC environments.

IC Role / Device Role / Timing Role: First-stage surge limiter ahead of GDT or TVS array; handles bulk energy before secondary clamping stages activate.

Use Value: 20°C/W R_θJL allows sustained 3.5W dissipation during multi-pulse testing, supporting IEC 61000-4-5 Level 4 compliance (4kV line-earth).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
P6SMB68A	Unidirectional 68V TVS diode; 52.2V V_BR, 100A I_PP (8/20μs), but no latching behavior or hold-current requirement.	Requires external series impedance or back-to-back configuration for AC line use; higher leakage (~1μA at 55V) than TB0720M's 5μA at 65V.	Select when fast response (<1ps) and no latch recovery delay are needed, but accept added component count and polarity management.
SMCJ64CA	Bi-directional TVS diode; 64V V_BR, 100A I_PP (8/20μs); clamps progressively rather than latching, with ~30V clamping voltage at 50A.	No holding current or recovery timing constraints; better suited for short-duration ESD/EFT, less effective for long-tail lightning surges.	Prefer for mixed-signal ports where low clamping voltage and sub-ns response outweigh energy-handling needs.

Compared with P6SMB68A and SMCJ64CA, TB0720M-13-F delivers superior energy absorption per unit volume via latching action and lower clamping voltage under sustained surge, making it optimal for telecom line interfaces where waveform duration and system reset behavior are critical.

Availability

TB0720M-13-F is available at Aetrix Electronics and suitable for DSL line card protection, T1/E1 interface hardening, and ISDN BRI surge suppression requiring stable component supply and full traceability through production lifecycles.

Supply support for TB0720M-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, specializing in high-reliability protection, signal integrity, and power management solutions for industrial, telecom, and consumer markets.

TB0720M-13-F belongs to the TB-series bidirectional TSPD product line, engineered specifically for primary-side surge immunity in telecom infrastructure - balancing precise voltage standoff, robust surge current rating, and SMB footprint efficiency.

FAQ

What is the maximum continuous operating voltage for TB0720M-13-F?

The maximum repetitive off-state voltage (V_DRM) is 65V DC or RMS. This is the highest continuous voltage the device can block without triggering. Operation above this level risks unintended conduction. Derating is recommended for reliability in high-temperature or high-humidity environments per Diodes Inc. Application Note AN-4001.

Does TB0720M-13-F require a gate drive or external trigger circuit?

No. TB0720M-13-F is a passive, voltage-triggered thyristor with no gate terminal. It conducts automatically when voltage across its terminals exceeds the symmetric breakover voltage (V_BO ≈ 88V), then remains latched until current drops below the holding current (I_H ≥ 150mA). No external control signals or biasing are needed.

How does TB0720M-13-F compare to a standard TVS diode in surge response?

TB0720M-13-F exhibits crowbar behavior: it transitions sharply from high-impedance to low-voltage conduction (≤3.5V) once triggered, sustaining current until cleared by system impedance. Standard TVS diodes clamp progressively with rising voltage under surge - resulting in higher clamping voltages (e.g., 30V+ at 50A) and greater power stress on downstream components.

Can TB0720M-13-F be used in automotive applications?

TB0720M-13-F is not AEC-Q200 qualified and lacks automotive-grade screening or extended temperature validation beyond its rated –40°C to +150°C junction range. While electrically capable of surviving automotive surge waveforms (ISO 7637-2 Pulse 1/2a/3a), its qualification status and absence of automotive-specific reliability data preclude formal use in safety-critical vehicle systems without additional customer validation.

TB0720M-13-F Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: DO-214AA, SMB

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Breakover:: 88V

Voltage - Off State:: 65V

Voltage - On State:: 3.5 V

Current - Peak Pulse (8/20µs):: 250 A

Current - Peak Pulse (10/1000µs):: 50 A

Current - Hold (Ih):: 150 mA

Number of Elements:: 1

Capacitance:: 140pF

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

TB0720M-13-F FAQ

1.How can I place an order for TB0720M-13-F through Aetrix?

Please submit a Request for Quotation (RFQ) for TB0720M-13-F 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 TB0720M-13-F reliable?

The price and inventory of TB0720M-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB0720M-13-F is usually 5 days.

3.What payment methods are accepted for TB0720M-13-F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB0720M-13-F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TB0720M-13-F?

TB0720M-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TB0720M-13-F 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 TB0720M-13-F?

For technical support, including TB0720M-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB0720M-13-F requirements.

6.How does Aetrix verify that TB0720M-13-F is sourced from the original manufacturer or authorized distributors?

All TB0720M-13-F 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 TB0720M-13-F meets industry standards.

7.What is the process for return or replacement of TB0720M-13-F?

All TB0720M-13-F units undergo pre-shipment inspection (PSI). If there is an issue with TB0720M-13-F, 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 TB0720M-13-F part is unused and in its original packaging.

Return procedure for TB0720M-13-F:

1.Submit a request within 90 days.

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

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