Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

onsemi MMT10B260T3

Name: MMT10B260T3
Brand: onsemi
SKU: MMT10B260T3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: MMT10B260T3

Manufacturer:: onsemi

Category:: Thyristors

Package:: DO-214AA, SMB

Datasheet:: MMT10B260T3.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:5,913

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

MMT10B260T3 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 10×1000 µs surge current rating, and fails short-circuit under overstress-ensuring continued circuit protection. It is surface-mount packaged in SMB (DO-214AA) and rated for operation from −40°C to +125°C.

For engineers reviewing the MMT10B260T3 datasheet, pinout, applications, or equivalent options, key selection criteria include bidirectional clamping voltage stability, guaranteed 100 A surge capability across −20°C to +65°C, fail-safe shorting behavior, compliance with GR-1089 second-level surge, and UL File #E210057 recognition.

Technical Context

The MMT10B260T3 operates as a crowbar-type protector: it remains high-impedance until transient voltage exceeds its breakover threshold (265–365 V), then latches into low-impedance conduction until surge current falls below its holding current (150–270 mA). Its dv/dt immunity exceeds 2000 V/s, minimizing false triggering.

It delivers bidirectional protection without polarity marking, supports telecom secondary protection per ITU K.20/K.21 and Bellcore 1089, and maintains stable voltage limiting across varying transient amplitudes and slew rates-critical for tip/ring line protection in customer-premises equipment.

Key Specifications

Parameter	Value and Actual Design Meaning
Breakover Voltage (V_BO)	265–365 V (bidirectional, defines precise clamping onset for telecom line transients)
Surge Current Rating	100 A peak, 10×1000 µs waveform (guaranteed across −20°C to +65°C ambient)
Holding Current (I_H)	150–270 mA (minimum current required to sustain conduction post-trigger)
Critical dv/dt	2000 V/s (prevents spurious turn-on from fast-rising noise or ringing)
Off-State Leakage	≤2.0 µA at 50 V (low standby power loss in protected circuits)
Package	SMB (DO-214AA, JEDEC-compliant SMT footprint with no polarity marking)
Fail-Safe Behavior	Shorts permanently when overstressed-prevents unprotected operation after end-of-life

Pinout & Package

SMB package (Case 403C), surface-mount, bidirectional-no anode/cathode polarity marking. Dimensions conform to JEDEC DO-214AA: 4.06–4.57 mm length, 3.30–3.81 mm width, 1.90–2.41 mm height.

Pin/Terminal	Circuit Role	Design Meaning
MT1	Thyristor Main Terminal 1	Bidirectional line terminal-connects to TIP or RING; identical function in either direction
MT2	Thyristor Main Terminal 2	Bidirectional line terminal-connects to opposing telecom line; interchangeable with MT1

Key Features

Feature	Design Value
Bidirectional Crowbar Protection	Single-device replacement for dual unidirectional protectors-reduces BOM count and PCB area
Stable Clamping Voltage	Minimal variation in V_BO across transient amplitude and rate of rise-ensures predictable protection margin
Fail-Safe Short-Circuit Mode	Guarantees continued overvoltage blocking after end-of-life-eliminates risk of latent open-circuit failure
GR-1089 Second-Level Compliance	Validated for 500 A, 2×10 µs surge waveforms-meets stringent telecom infrastructure requirements
Pb-Free SMT Packaging	SMB footprint compatible with lead-free reflow profiles up to 260°C for 10 sec-supports RoHS-compliant manufacturing

Applications

DSL Line Interface Protection	VoIP Gateway Tip/Ring Protection
Use Scenario: Protecting analog front-end circuitry in DSLAM line cards against lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Bidirectional crowbar protector placed between tip/ring and line interface IC-clamps transients above 265 V and shunts >100 A surge energy to ground. Use Value: Enables compliance with ITU-T K.21 Class H and Bellcore GR-1089 second-level surge testing without external coordination components.	Use Scenario: Secondary surge protection for VoIP gateways deployed at customer premises, interfacing with POTS lines. IC Role / Device Role / Timing Role: Fail-safe TSPD mounted directly on tip/ring traces-latches during surge and holds until current decays below 150 mA. Use Value: Prevents catastrophic failure of downstream SLIC or codec ICs by guaranteeing short-circuit failure mode upon overstress.
ISDN BRI Line Protection	Remote-Powered Telecom Equipment
Use Scenario: Protecting ISDN Basic Rate Interface (BRI) U-interface transceivers from induced surges in outdoor plant wiring. IC Role / Device Role / Timing Role: High-dv/dt immune (2000 V/s) bidirectional protector-suppresses fast-rising transients without false triggering during normal signaling. Use Value: Maintains signal integrity during 60 Hz AC ringing while providing robust 100 A surge handling per GR-1089.	Use Scenario: Surge protection for remote-powered telecom devices (e.g., powered splitters or repeaters) connected to long outside-plant cables. IC Role / Device Role / Timing Role: Primary secondary protector operating across −40°C to +125°C junction temperature-survives extended thermal cycling in uncontrolled environments. Use Value: Eliminates need for derating at elevated ambient temperatures-delivers full 100 A surge rating up to +65°C ambient.

DSL Line Interface Protection

VoIP Gateway Tip/Ring Protection

Use Scenario: Protecting analog front-end circuitry in DSLAM line cards against lightning-induced surges on twisted-pair copper lines.

IC Role / Device Role / Timing Role: Bidirectional crowbar protector placed between tip/ring and line interface IC-clamps transients above 265 V and shunts >100 A surge energy to ground.

Use Value: Enables compliance with ITU-T K.21 Class H and Bellcore GR-1089 second-level surge testing without external coordination components.

Use Scenario: Secondary surge protection for VoIP gateways deployed at customer premises, interfacing with POTS lines.

IC Role / Device Role / Timing Role: Fail-safe TSPD mounted directly on tip/ring traces-latches during surge and holds until current decays below 150 mA.

Use Value: Prevents catastrophic failure of downstream SLIC or codec ICs by guaranteeing short-circuit failure mode upon overstress.

ISDN BRI Line Protection

Remote-Powered Telecom Equipment

Use Scenario: Protecting ISDN Basic Rate Interface (BRI) U-interface transceivers from induced surges in outdoor plant wiring.

IC Role / Device Role / Timing Role: High-dv/dt immune (2000 V/s) bidirectional protector-suppresses fast-rising transients without false triggering during normal signaling.

Use Value: Maintains signal integrity during 60 Hz AC ringing while providing robust 100 A surge handling per GR-1089.

Use Scenario: Surge protection for remote-powered telecom devices (e.g., powered splitters or repeaters) connected to long outside-plant cables.

IC Role / Device Role / Timing Role: Primary secondary protector operating across −40°C to +125°C junction temperature-survives extended thermal cycling in uncontrolled environments.

Use Value: Eliminates need for derating at elevated ambient temperatures-delivers full 100 A surge rating up to +65°C ambient.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Littelfuse SP1003-020	Unidirectional, 200 V V_BRW, 100 A 8/20 µs rating, TO-220 package	Requires two devices for bidirectional protection; larger footprint; higher thermal mass	Select when higher single-pulse energy handling is needed and board space allows TO-220 mounting
Vishay V130LA20AP	Varistor-based, 130 V RMS clamping, 10 kA 8/20 µs, radial leaded	No latching behavior-voltage clamping degrades with repeated surges; no fail-safe shorting	Select only for cost-sensitive, non-critical applications where wear-out mechanisms are acceptable

Compared with SP1003-020 and V130LA20AP, the MMT10B260T3 provides true bidirectional crowbar action in a compact SMB package with guaranteed fail-short behavior-making it uniquely suitable for telecom secondary protection where reliability, predictability, and space constraints are critical.

Availability

MMT10B260T3 is available at Aetrix Electronics and suitable for DSL line interfaces, VoIP gateway protection, ISDN BRI circuits, and remote-powered telecom equipment requiring stable component supply and long-term lifecycle support.

Supply support for MMT10B260T3 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and communications markets.

The MMT10B260T3 belongs to onsemi's Thyristor Surge Protector (TSPD) product line-engineered specifically for secondary overvoltage protection in telecom line interfaces meeting GR-1089, ITU K.20/K.21, and UL 1459 standards.

FAQ

What is the exact breakover voltage range for MMT10B260T3?

The MMT10B260T3 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 range ensures reliable triggering during telecom line surges while maintaining safe margin below system insulation ratings.

Does MMT10B260T3 require external gate control or biasing?

No, the MMT10B260T3 is a breakover-triggered thyristor device with no gate terminal-it operates autonomously based on applied voltage and dv/dt. It requires no external bias, control signals, or supporting circuitry. The device triggers when line voltage exceeds its V_BO threshold and sustains conduction until current falls below its holding current (150–270 mA).

Is MMT10B260T3 compliant with RoHS and lead-free soldering standards?

Yes, the MMT10B260T3G variant is Pb-free and qualified for lead-free reflow soldering up to 260°C for 10 seconds. The device meets RoHS Directive 2011/65/EU and is marked with the "G" suffix to indicate Pb-free packaging. Standard MMT10B260T3 (non-G) is legacy leaded construction.

How does MMT10B260T3 behave after surviving multiple surge events?

The MMT10B260T3 exhibits no wear-out mechanism-its silicon thyristor structure retains full electrical specifications after repeated surge events within rating limits. Unlike varistors or gas tubes, it does not degrade with use. Only when overstressed beyond its 4000 W peak power or 175°C junction limit does it fail-and then it shorts reliably, preserving downstream circuit protection.

Can MMT10B260T3 be used in AC mains protection applications?

No, the MMT10B260T3 is not rated for AC mains (120/230 VAC) primary protection. Its 265–365 V V_BO range and 100 A surge rating are optimized for telecom secondary protection (e.g., tip/ring, DSL, ISDN). For AC mains, higher-voltage TSPDs such as MMT10B400T3 or dedicated MOV/GDT hybrid solutions are required to meet IEC 61643-11 and UL 1449 standards.

MMT10B260T3 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

MMT10B260T3 FAQ

1.How can I place an order for MMT10B260T3 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMT10B260T3 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 MMT10B260T3 reliable?

The price and inventory of MMT10B260T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMT10B260T3 is usually 5 days.

3.What payment methods are accepted for MMT10B260T3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMT10B260T3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMT10B260T3?

MMT10B260T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMT10B260T3 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 MMT10B260T3?

For technical support, including MMT10B260T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMT10B260T3 requirements.

6.How does Aetrix verify that MMT10B260T3 is sourced from the original manufacturer or authorized distributors?

All MMT10B260T3 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 MMT10B260T3 meets industry standards.

7.What is the process for return or replacement of MMT10B260T3?

All MMT10B260T3 units undergo pre-shipment inspection (PSI). If there is an issue with MMT10B260T3, 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 MMT10B260T3 part is unused and in its original packaging.

Return procedure for MMT10B260T3:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…