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

Diodes Incorporated TB0640L-13

Name: TB0640L-13
Brand: Diodes Incorporated
SKU: TB0640L-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TB0640L-13

Manufacturer:: Diodes Incorporated

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: TB0640L-13.pdf

Description:: THYRISTOR 58V 150A DO-214AA

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Product details

Overview

TB0640L-13 from Diodes Incorporated is a bi-directional surface-mount thyristor surge protective device (TSPD) designed for primary-level transient overvoltage clamping in AC/DC power lines and telecom interfaces. It features 58 V stand-off voltage, 77 V breakover voltage, 30 A peak pulse current (10/1000 µs), 3.5 V on-state voltage at 1 A, and 100 pF off-state capacitance - enabling robust protection of low-voltage analog and digital circuits in DSL modems and PoE-powered endpoints.

For engineers reviewing the TB0640L-13 datasheet, TB0640L-13 pinout, TB0640L-13 application, or TB0640L-13 equivalent, key selection criteria include verified bi-directional clamping behavior, junction temperature derating up to +150°C, SMB package thermal resistance (R_θJL = 30°C/W), and compliance with IEC 61000-4-5 (150 A, 8/20 µs) and GR-1089-CORE (30 A, 10/1000 µs) surge standards.

Technical Context

This TSPD operates as a voltage-triggered crowbar device: it remains high-impedance below V_DRM (58 V), transitions rapidly to low-impedance conduction upon reaching V_BO (77 V), and sustains clamping until current falls below I_H (150–800 mA). Its oxide-glass passivated junction ensures stable breakdown characteristics across -40°C to +150°C.

Unlike unidirectional TVS diodes, the TB0640L-13 provides symmetrical protection without polarity constraints, eliminating need for back-to-back component placement. Its 100 pF off-state capacitance at 1 MHz/2 V bias minimizes signal distortion in broadband telecom applications such as ADSL line cards and Ethernet PHY interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM	58 V - Maximum continuous reverse/forward voltage before leakage exceeds 5 µA; sets operating margin for 48 V DC or 36 V RMS AC lines.
V_BO	77 V - Breakover voltage threshold triggering crowbar action; ensures reliable clamping before downstream IC damage occurs.
I_PP (10/1000 µs)	30 A - Peak surge current handling per GR-1089-CORE; supports Level 3 telecom surge immunity requirements.
R_θJL	30 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking for sustained surge duty cycles.
C_O	100 pF - Off-state capacitance at 1 MHz/2 V bias; preserves signal integrity in sub-10 MHz analog and baseband data paths.
I_H	150–800 mA - Holding current range defining minimum load current required to maintain on-state; critical for proper recovery after surge event.
T_J Range	-40°C to +150°C - Validated junction temperature operating window; supports industrial and outdoor deployment 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 terminals; symmetric structure allows identical clamping in both directions without orientation dependency.
Case	Thermal path / mechanical anchor	Exposed copper pad under package body serves as primary heat sink; requires solder mask defined thermal pad on PCB.

Key Features

Feature	Design Value
Oxide-glass passivated junction	Ensures stable V_BO drift <0.1%/°C and long-term reliability under repeated surge stress.
Bi-directional clamping in single device	Eliminates need for dual TVS or back-to-back diode configurations, reducing BOM count and board space by ≥40%.
High off-state impedance (>100 MΩ @ 50 V)	Prevents standby power loss and signal loading in always-on interfaces like telephone line monitoring circuits.
SMB package with R_θJL = 30°C/W	Enables >2× higher surge energy dissipation vs. SOD-123 equivalents under identical PCB layout conditions.

Applications

DSL Line Card Protection

PoE Powered Device Interface

Use Scenario: Protecting ADSL transceiver front-end from lightning-induced surges on twisted-pair telephone lines.

IC Role / Device Role / Timing Role: Primary crowbar clamping element placed between line transformer secondary and codec input.

Use Value: 77 V V_BO aligns with ITU-T K.21 basic protection level; 100 pF C_O avoids attenuation of upstream/downstream 1–2.2 MHz signals.

Use Scenario: Safeguarding 48 V DC input of IEEE 802.3af/at PD controllers against Ethernet cable ESD and surge events.

IC Role / Device Role / Timing Role: Standby-mode overvoltage clamp on PD midspan input, activated only during fault conditions.

Use Value: 58 V V_DRM provides 20% margin above 48 V nominal; bi-directionality covers both positive and negative polarity surges per IEC 61000-4-5.

Industrial AC Sensor Input

Smart Meter Communication Port

Use Scenario: Shielding 24 V AC sensor inputs in PLC I/O modules from induced transients on factory floor wiring.

IC Role / Device Role / Timing Role: First-stage protection ahead of rectifier and regulator; handles repetitive 10/1000 µs surges up to 30 A.

Use Value: R_θJL = 30°C/W allows direct thermal coupling to ground plane, sustaining >1000 surge events without degradation.

Use Scenario: Securing RS-485 or HPLC communication ports in electricity meters against meter box-level surges.

IC Role / Device Role / Timing Role: Bi-directional line protector on differential bus pair; coordinated with secondary TVS for full waveform suppression.

Use Value: Symmetric V_DRM/V_BO eliminates polarity concerns during field installation; 150 A (8/20 µs) rating meets EN 61000-4-5 Class 3.

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
SMBJ58CA	Unidirectional TVS diode; 58 V standoff, 93.6 V clamping (I_PP = 30 A, 10/1000 µs); no holding current or crowbar behavior.	Requires dual-device configuration for AC line protection; higher clamping voltage increases risk to downstream ICs.	Select when fast response (<1 ps) and low clamping voltage are prioritized over crowbar latching behavior.
P6SMB58CA	Same unidirectional TVS architecture as SMBJ58CA but rated for 600 W peak power; identical V_BR and clamping profile.	Lacks bi-directional symmetry; unsuitable for true AC line protection without external bridge rectification.	Choose only for DC-biased or rectified AC applications where polarity is fixed and crowbar recovery is not required.

Compared with SMBJ58CA and P6SMB58CA, the TB0640L-13 delivers true bi-directional crowbar action with defined holding current and lower clamping voltage (77 V vs. ≥93.6 V), enabling simpler, more robust protection in AC-coupled telecom and industrial interfaces without added components.

Availability

TB0640L-13 is available at Aetrix Electronics and suitable for DSL line card design, PoE-powered device interface protection, and industrial AC sensor input conditioning requiring stable component supply and long-term lifecycle support.

Supply support for TB0640L-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, headquartered in Plano, Texas, with design centers across Asia and Europe.

The TB-series TSPDs are engineered specifically for telecom and industrial surge immunity compliance, emphasizing bi-directional symmetry, high surge current capability, and stable thermal performance in SMB packaging.

FAQ

What is the maximum allowable surge repetition rate for TB0640L-13?

The TB0640L-13 has no specified minimum recovery time between surges, but its surge recovery time does not exceed 30 ms per datasheet Note 1. For repetitive surges, thermal limits govern duty cycle: with R_θJL = 30°C/W and T_J(max) = +150°C, average power must stay below ~2.3 W assuming 25°C ambient and adequate PCB copper area.

Does TB0640L-13 require a series current-limiting resistor?

No series resistor is required for crowbar operation, as the device self-limits current via on-state voltage (3.5 V at 1 A). However, a fuse or PTC is strongly recommended upstream to interrupt sustained fault current and prevent thermal runaway if the protected circuit fails short.

How does junction temperature affect breakover voltage stability?

Breakover voltage exhibits a positive temperature coefficient of +0.1%/°C (Fig. 3). At +125°C, V_BO rises to ~1.025 × 77 V ≈ 78.9 V - within safe margin for 58 V V_DRM systems. This predictable drift simplifies thermal design versus avalanche-based TVS devices.

Can TB0640L-13 be used in DC-only applications?

Yes - its bi-directional nature makes it fully compatible with DC bus protection, provided the system's fault current can drop below I_H (150–800 mA) to allow automatic recovery. In constant-current DC loads, a series fuse remains essential to force current interruption after triggering.

TB0640L-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):: 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

TB0640L-13 FAQ

1.How can I place an order for TB0640L-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for TB0640L-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 TB0640L-13 reliable?

The price and inventory of TB0640L-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB0640L-13 is usually 5 days.

3.What payment methods are accepted for TB0640L-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB0640L-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TB0640L-13?

TB0640L-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TB0640L-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 TB0640L-13?

For technical support, including TB0640L-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB0640L-13 requirements.

6.How does Aetrix verify that TB0640L-13 is sourced from the original manufacturer or authorized distributors?

All TB0640L-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 TB0640L-13 meets industry standards.

7.What is the process for return or replacement of TB0640L-13?

All TB0640L-13 units undergo pre-shipment inspection (PSI). If there is an issue with TB0640L-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 TB0640L-13 part is unused and in its original packaging.

Return procedure for TB0640L-13:

1.Submit a request within 90 days.

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

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