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

Diodes Incorporated TB0640H-13

Name: TB0640H-13
Brand: Diodes Incorporated
SKU: TB0640H-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TB0640H-13

Manufacturer:: Diodes Incorporated

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: TB0640H-13.pdf

Description:: THYRISTOR 58V 400A DO-214AA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TB0640H-13 from Diodes Incorporated is a bidirectional surface-mount thyristor surge protective device (TSPD) designed for primary-level transient overvoltage clamping in telecom and data line interfaces. It features a 58 V maximum repetitive off-state voltage (V_DRM), 100 A peak pulse current (10/1000 μs), 77 V breakover voltage (V_BO), 3.5 V on-state voltage at 1 A, and 200 pF 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 TB0640H-13 datasheet, TB0640H-13 pinout, TB0640H-13 application, or TB0640H-13 equivalent, key selection criteria include stand-off voltage tolerance, bidirectional clamping symmetry, surge current derating under thermal stress, junction-to-lead thermal resistance (20 °C/W), and UL 497B recognition for telecom safety compliance.

Technical Context

The TB0640H-13 operates as a voltage-triggered, gateless bidirectional thyristor that latches into low-impedance conduction upon exceeding its 77 V breakover voltage (V_BO) and remains conducting until current falls below its 150–800 mA holding current (I_H). Its oxide-glass passivated junction ensures stable V_BO drift of only +0.1 %/°C across –40 to +150 °C junction temperature.

It delivers 100 A non-repetitive impulse current under 10/1000 μs waveform and sustains 400 A under 8/20 μs, with off-state leakage limited to 5 μA at 58 V and junction capacitance fixed at 200 pF (1 MHz, 2 V bias), minimizing signal distortion in high-speed data lines.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	58 V - Maximum continuous AC/DC stand-off voltage before triggering; sets minimum operating margin for 48 V telecom systems.
V_BO	77 V - Breakover voltage threshold; defines precise clamping onset for transient suppression without false triggering.
I_PP (10/1000 μs)	100 A - Peak surge current handling; supports Level 4 GR-1089-CORE immunity in central office equipment.
R_θJL	20 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking for repeated surge duty cycles.
C_O	200 pF - Off-state capacitance at 1 MHz/2 V bias; preserves signal integrity up to ~10 MHz in ADSL2+ and VDSL2 lines.
I_H	150–800 mA - Holding current range; ensures reliable self-reset after surge when line current drops below threshold.
T_J Range	–40 to +150 °C - Operational junction temperature span; validated for outdoor cabinet and industrial telecom environments.

Pinout & Package

Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking; case material is UL 94V-0 molded plastic; weight ≈ 0.093 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode/Cathode (A/K)	Bidirectional main terminals	Interchangeable due to symmetrical thyristor structure; both pins conduct identically during positive/negative transients.
Case	Non-electrical mechanical interface	UL 94V-0 plastic body provides isolation; no internal connection - serves only as thermal path and mounting surface.

Key Features

Feature	Design Value
Bidirectional clamping	Enables single-device protection of AC-coupled or differential telecom lines (e.g., T1, ISDN S/T) without polarity concerns.
Oxide-glass passivated junction	Ensures <±5% V_BO tolerance and <0.1 %/°C temperature coefficient - critical for consistent clamping across environmental extremes.
UL 497B recognition	Validates suitability for primary-side protection in telecom network interface devices (NIDs) and line cards per safety standard.
Lead-free & halogen-free	Meets RoHS Directive 2002/95/EC and JEDEC J-STD-020 moisture sensitivity Level 1 - supports lead-free reflow assembly.

Applications

DSL Line Card Protection

T1/E1 Interface Protection

Use Scenario: Protecting xDSL line drivers and receivers from lightning-induced surges on twisted-pair copper loops.

IC Role / Device Role / Timing Role: Primary-level crowbar device that clamps transients above 77 V while maintaining <200 pF loading on 1–30 MHz signals.

Use Value: Prevents damage to downstream line transceivers (e.g., LMX2594-based clock recovery) by diverting >100 A surges within nanoseconds.

Use Scenario: Safeguarding T1/E1 framer ICs and transformer-coupled line interfaces in carrier-grade access multiplexers.

IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp placed before isolation transformers to absorb 400 A (8/20 μs) surges per IEC 61000-4-5.

Use Value: Maintains signal fidelity with minimal capacitive loading, avoiding jitter degradation in 2.048 Mbps E1 timing paths.

ISDN S/T Bus Protection

Central Office Line Card

Use Scenario: Securing ISDN terminal adapters against induced surges on shared S/T bus wiring in multi-line business systems.

IC Role / Device Role / Timing Role: Standoff-rated protector (58 V V_DRM) that remains transparent during normal 48 V DC power delivery and 100 kHz signaling.

Use Value: Eliminates need for separate AC/DC coupling networks while meeting ITU-T K.20/K.21 immunity requirements.

Use Scenario: Front-end surge suppression in Class 5 central office line cards exposed to lightning strikes on outside plant cables.

IC Role / Device Role / Timing Role: UL 497B-recognized primary protector rated for GR-1089-CORE Level 4 (100 A, 10/1000 μs).

Use Value: Reduces field failure rates by >90% compared to MOV-only solutions due to faster response and lower clamping voltage.

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
Littelfuse SP1003-058	Same 58 V V_DRM, but 120 A I_PP (10/1000 μs); higher 250 pF C_O; SMB package.	Higher surge rating suits harsher outdoor deployments; increased capacitance may limit use in >15 MHz VDSL2.	Select when higher I_PP margin is prioritized over RF bandwidth.
Bourns TBU-CA12-200-WH	Not a thyristor - it's a resettable TBU (thermal cutoff); 12 V trip voltage, 200 mA hold current; different protection mechanism.	Acts as current-limiting switch, not voltage-clamping device; requires coordination with downstream TVS.	Choose only for secondary overcurrent protection; not a direct functional replacement.

Compared with SP1003-058 and TBU-CA12-200-WH, the TB0640H-13 uniquely balances low-capacitance clamping (200 pF), precise 77 V V_BO, and UL 497B listing - making it optimal for telecom primary protection where signal integrity and regulatory compliance are jointly critical.

Availability

TB0640H-13 is available at Aetrix Electronics and suitable for DSL line cards, T1/E1 interface modules, ISDN S/T bus protection, and central office line cards requiring stable component supply, long-lifecycle support, and full traceability.

Supply support for TB0640H-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 and communications markets.

The TB series TSPDs are engineered specifically for primary-level surge immunity in telecom infrastructure - emphasizing bidirectional symmetry, low capacitance, and UL/IEC certification readiness from wafer to final test.

FAQ

What is the maximum continuous operating voltage for TB0640H-13?

The TB0640H-13 has a maximum repetitive off-state voltage (V_DRM) of 58 V DC or RMS. This is the highest steady-state voltage it can block without triggering. Operation above this level risks unintended conduction; design margin should maintain at least 20% below V_DRM for reliability under temperature and aging effects.

Does TB0640H-13 require a gate drive or external trigger circuit?

No - the TB0640H-13 is a gateless, voltage-triggered bidirectional thyristor. It conducts automatically when voltage across its terminals exceeds 77 V (V_BO) in either polarity. No external control signal, resistor network, or timing circuit is needed, simplifying PCB layout and reducing BOM count.

How does TB0640H-13 compare to a standard MOV for telecom line protection?

Unlike MOVs, the TB0640H-13 offers sharper voltage clamping (77 V V_BO vs. ±10% V_N tolerance), lower leakage (<5 μA), stable parameters over temperature (+0.1 %/°C), and no degradation after repeated surges. MOVs exhibit capacitance drift and wear-out; the TB0640H-13 maintains 200 pF and clamping performance across its full lifetime.

Can TB0640H-13 be used in automotive applications?

No - the TB0640H-13 is not qualified to AEC-Q200 or automotive temperature/humidity standards. Its –40 to +150 °C junction rating meets industrial telecom requirements, but it lacks automotive-specific qualification, vibration testing, and PPAP documentation. Automotive designs require purpose-qualified TSPDs such as Diodes' AP7XXX series.

TB0640H-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:: 77V

Voltage - Off State:: 58V

Voltage - On State:: 3.5 V

Current - Peak Pulse (8/20µs):: 400 A

Current - Peak Pulse (10/1000µs):: 100 A

Current - Hold (Ih):: 150 mA

Number of Elements:: 1

Capacitance:: 200pF

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

TB0640H-13 FAQ

1.How can I place an order for TB0640H-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for TB0640H-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 TB0640H-13 reliable?

The price and inventory of TB0640H-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB0640H-13 is usually 5 days.

3.What payment methods are accepted for TB0640H-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB0640H-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TB0640H-13?

TB0640H-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TB0640H-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 TB0640H-13?

For technical support, including TB0640H-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB0640H-13 requirements.

6.How does Aetrix verify that TB0640H-13 is sourced from the original manufacturer or authorized distributors?

All TB0640H-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 TB0640H-13 meets industry standards.

7.What is the process for return or replacement of TB0640H-13?

All TB0640H-13 units undergo pre-shipment inspection (PSI). If there is an issue with TB0640H-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 TB0640H-13 part is unused and in its original packaging.

Return procedure for TB0640H-13:

1.Submit a request within 90 days.

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

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