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

onsemi MMT10B260T3G

Name: MMT10B260T3G
Brand: onsemi
SKU: MMT10B260T3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMT10B260T3G

Manufacturer:: onsemi

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: MMT10B260T3G.pdf

Description:: THYRISTOR 200V 100A DO-214AA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MMT10B260T3G from onsemi is a bidirectional thyristor surge protective device (TSPD) designed for secondary overvoltage protection in telecom line interfaces. It features a 265–365 V breakover voltage range, 100 A peak surge current (10×1000 µs), 2000 V/s critical dv/dt rating, and fails short-circuit under overstress-ensuring continued protection integrity in customer-premises telecom equipment.

For engineers reviewing the MMT10B260T3G datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping voltage window, guaranteed surge capability across −20°C to +65°C, fail-safe shorting behavior, SMB package thermal limits, and compliance with GR-1089 Level 2 (500 A, 2×10 µs) and ITU-T K.20/K.21 standards.

Technical Context

This device operates as a crowbar-type protector: it remains high-impedance until transient voltage exceeds its breakover threshold (V_BO = 265–365 V), then latches into low-impedance conduction until surge current falls below holding current (I_H = 150–270 mA). Its bidirectional symmetry eliminates polarity concerns in AC-coupled telecom lines.

It delivers 4000 W instantaneous peak power dissipation at 100 A, supports 260 °C soldering, and maintains stable V_BO with only +0.08 %/°C temperature coefficient-critical for consistent protection margin across operating temperature (−40°C to +125°C junction).

Key Specifications

Parameter	Value and Actual Design Meaning
Breakover Voltage (V_BO)	265–365 V (bidirectional; defines precise clamping onset for telecom line transients)
Peak Surge Current (I_PPS3)	100 A (10×1000 µs waveform; validated across −20°C to +65°C ambient)
Holding Current (I_H)	150–270 mA (minimum current required to sustain conduction; ensures clean turn-off after surge)
Critical dv/dt	2000 V/s (prevents false triggering from fast-rising noise on tip/ring lines)
Off-State Leakage (I_D2)	≤5.0 µA at V_DM = 200 V (low standby power loss in always-connected telecom interfaces)
On-State Voltage (V_T)	≤5.0 V at I_T = 1.0 A (limits power dissipation during crowbar conduction)
Junction Temp Range	−40°C to +125°C (supports operation in uncontrolled indoor telecom cabinets)

Pinout & Package

MMT10B260T3G uses an SMB package (JEDEC DO-214AA, Case 403C), surface-mount, polarity-free construction. Two terminals-MT1 and MT2-are electrically symmetric and interchangeable.

Pin/Terminal	Circuit Role	Design Meaning
MT1	Anode/Cathode (bidirectional)	Interchangeable terminal; connects to either tip or ring line without polarity constraint
MT2	Anode/Cathode (bidirectional)	Interchangeable terminal; completes symmetrical crowbar path across telecom differential pair

Key Features

Feature	Design Value
Bidirectional crowbar action	Eliminates need for back-to-back diac or dual-device placement on AC telecom lines
Fail-safe short-circuit behavior	Guarantees circuit remains protected-even after end-of-life overstress-by physically shorting faulted line to ground
Stable V_BO vs. temperature	+0.08 %/°C coefficient ensures ≤±10 V variation across full operating range, preserving margin against telecom ringing voltage
Pb-free SMB package	Enables RoHS-compliant reflow assembly without lead contamination risk in telecom BOMs
GR-1089 Level 2 compliance	Validated for 500 A, 2×10 µs surge waveforms-exceeding baseline requirements for secondary telecom protection

Applications

DSL Line Interface Protection	VoIP Gateway Tip/Ring Protection
Use Scenario: Protects ADSL/VDSL line interface ICs from lightning-induced surges entering via outdoor plant wiring. IC Role / Device Role / Timing Role: Crowbar-type primary secondary protector placed before PPTC and line transformer. Use Value: Clamps transients above 265 V within nanoseconds while surviving repeated 100 A surges-preserving signal integrity and preventing IC latch-up.	Use Scenario: Shields VoIP analog front-end (AFE) components from induced surges on residential telephone wiring. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp between tip/ring and ground, upstream of isolation transformer. Use Value: Symmetric response ensures equal protection regardless of line polarity reversal-critical for universal deployment in global VoIP hardware.
ISDN BRI S/T Interface	Central Office Customer Premises Equipment
Use Scenario: Secures ISDN Basic Rate Interface (BRI) physical layer against cross-talk and power-line coupling events. IC Role / Device Role / Timing Role: Fast-acting voltage-triggered switch that diverts surge energy before reaching transceiver ICs. Use Value: 2000 V/s dv/dt immunity prevents spurious triggering from normal ISDN signaling edges (e.g., 2B1Q transitions).	Use Scenario: Integrated into DSLAM or fiber-to-the-node (FTTN) cabinet protection modules serving multiple subscriber lines. IC Role / Device Role / Timing Role: Secondary surge arrestor deployed downstream of gas discharge tubes (GDTs) in multi-stage telecom protection schemes. Use Value: Low capacitance (≤200 pF) avoids signal degradation on 1–30 MHz DSL bands while providing precise voltage clamping.

DSL Line Interface Protection

VoIP Gateway Tip/Ring Protection

Use Scenario: Protects ADSL/VDSL line interface ICs from lightning-induced surges entering via outdoor plant wiring.

IC Role / Device Role / Timing Role: Crowbar-type primary secondary protector placed before PPTC and line transformer.

Use Value: Clamps transients above 265 V within nanoseconds while surviving repeated 100 A surges-preserving signal integrity and preventing IC latch-up.

Use Scenario: Shields VoIP analog front-end (AFE) components from induced surges on residential telephone wiring.

IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp between tip/ring and ground, upstream of isolation transformer.

Use Value: Symmetric response ensures equal protection regardless of line polarity reversal-critical for universal deployment in global VoIP hardware.

ISDN BRI S/T Interface

Central Office Customer Premises Equipment

Use Scenario: Secures ISDN Basic Rate Interface (BRI) physical layer against cross-talk and power-line coupling events.

IC Role / Device Role / Timing Role: Fast-acting voltage-triggered switch that diverts surge energy before reaching transceiver ICs.

Use Value: 2000 V/s dv/dt immunity prevents spurious triggering from normal ISDN signaling edges (e.g., 2B1Q transitions).

Use Scenario: Integrated into DSLAM or fiber-to-the-node (FTTN) cabinet protection modules serving multiple subscriber lines.

IC Role / Device Role / Timing Role: Secondary surge arrestor deployed downstream of gas discharge tubes (GDTs) in multi-stage telecom protection schemes.

Use Value: Low capacitance (≤200 pF) avoids signal degradation on 1–30 MHz DSL bands while providing precise voltage clamping.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SM10T270A	Unidirectional TSPD; 270 V V_BR; 100 A surge rating; SMA package	Requires external reverse-polarity protection; less suitable for AC telecom lines	Select only when used with series diode or in DC-biased circuits where polarity is fixed
BT138-600D	Triac-based; 600 V blocking; higher I_H (500 mA); TO-220 package	Larger footprint; not optimized for telecom surge waveforms or GR-1089 compliance	Consider only for industrial AC mains protection-not telecom line interfaces

Compared with SM10T270A and BT138-600D, the MMT10B260T3G uniquely combines bidirectional symmetry, SMB footprint, GR-1089 Level 2 validation, and precise 265–365 V V_BO window-making it the only drop-in solution for space-constrained, standards-compliant telecom secondary protection.

Availability

MMT10B260T3G is available at Aetrix Electronics and suitable for DSL line interface protection, VoIP gateway tip/ring protection, and ISDN BRI S/T interface designs requiring stable component supply, RoHS compliance, and repeatable surge performance across temperature.

Supply support for MMT10B260T3G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and communications markets.

The MMT10B260T3G belongs to onsemi's Thyristor Surge Protector (TSPD) family-engineered specifically for secondary-level overvoltage protection in telecom infrastructure, with emphasis on fail-safe operation, regulatory compliance (ITU-T K.20/K.21, GR-1089), and robustness in customer-premises environments.

FAQ

What is the exact breakover voltage range for MMT10B260T3G?

The MMT10B260T3G has a specified breakover voltage (V_BO) range of 265 V to 365 V for both polarities, measured at 25°C with 1.0 A short-circuit current and 1000 V DC test voltage. At +65°C, the upper limit extends to 400 V. This window ensures reliable triggering above telecom ringing voltage (typically ≤170 V) while avoiding nuisance tripping.

Does MMT10B260T3G meet GR-1089 Level 2 surge requirements?

Yes, the MMT10B260T3G is explicitly validated for GR-1089 Second Level Surge testing using a 500 A, 2×10 µs waveform. This exceeds standard secondary protection requirements and confirms its suitability for use in carrier-class telecom customer premises equipment where high-energy transients must be safely diverted.

How does MMT10B260T3G behave when overstressed beyond ratings?

When subjected to energy exceeding its safe operating area, the MMT10B260T3G fails in a short-circuit mode-maintaining a low-impedance path between MT1 and MT2. This fail-safe behavior prevents unprotected operation and alerts system designers to replace the device, aligning with telecom safety mandates for continuous protection integrity.

Is MMT10B260T3G compatible with lead-free reflow processes?

Yes, the "G" suffix in MMT10B260T3G denotes a Pb-free SMB package qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds. Its thermal characteristics-including 175°C maximum conducting-state junction temperature-support reliable solder joint formation without parametric shift.

What is the holding current specification for MMT10B260T3G?

The MMT10B260T3G has a holding current (I_H) range of 150 mA to 270 mA, measured at 25°C with 500 V sustaining voltage and 1.0 A initiating current. This ensures stable latching during surge conduction and clean turn-off once line current drops below this threshold-critical for restoring normal operation post-transient.

MMT10B260T3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Package/Case:: DO-214AA, SMB

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Breakover:: 320V

Voltage - Off State:: 200V

Voltage - On State:: 5 V

Current - Peak Pulse (8/20µs):: -

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

MMT10B260T3G FAQ

1.How can I place an order for MMT10B260T3G through Aetrix?

Please submit a Request for Quotation (RFQ) for MMT10B260T3G 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 MMT10B260T3G reliable?

The price and inventory of MMT10B260T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMT10B260T3G is usually 5 days.

3.What payment methods are accepted for MMT10B260T3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMT10B260T3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMT10B260T3G?

MMT10B260T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMT10B260T3G 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 MMT10B260T3G?

For technical support, including MMT10B260T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMT10B260T3G requirements.

6.How does Aetrix verify that MMT10B260T3G is sourced from the original manufacturer or authorized distributors?

All MMT10B260T3G 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 MMT10B260T3G meets industry standards.

7.What is the process for return or replacement of MMT10B260T3G?

All MMT10B260T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMT10B260T3G, 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 MMT10B260T3G part is unused and in its original packaging.

Return procedure for MMT10B260T3G:

1.Submit a request within 90 days.

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

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